MEA - Daikin Applied · • Double-wall construction protec ts insulation and provides a wipe clean...

Catalog 219

RoofPak™ Singlezone Heating and Cooling UnitsWith Evaporative Condensers

See page 1

MEA368-93-N

Type RPE/RDE75 to 150 Tons

RPE = DWDI Airfoil SAFBlow Through or Draw Through Cooling Coil / FiltersGas, Electric, Steam or Hot Water Heat

RDE = SWSI Airfoil (Plenum) SAF Draw Through Cooling / FiltersSteam or Hot Water Heat

1

ContentsMcQuay’s unique features and options . . . . . . . . .2Energy Savings . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Factory Installed and Wired Options . . . . . . . . . .10Application Considerations . . . . . . . . . . . . . . . . . .14Selection Instructions . . . . . . . . . . . . . . . . . . . . . .23Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25Cooling Capacity Data . . . . . . . . . . . . . . . . . . . . . .26

Heating Capacity Data . . . . . . . . . . . . . . . . . . . . . 32Component Pressure Drops . . . . . . . . . . . . . . . . 37Fan Performance Data . . . . . . . . . . . . . . . . . . . . . 38Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . 42Roof Curbs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51Unit Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54Engineering Guide Specification . . . . . . . . . . . . . 57

“HI-F,” “MicroTech II,” “RoofPak,” “Protocol Selectability,” “SpeedTrol,” “VaneTrol,” “DesignFlow,” “SuperMod,” and “UltraSeal” are trademarks and “McQuay” is a registered trademark of McQuay International, Minneapolis, Minnesota.

The McQuay HI-F fin surface is covered by U.S. Patent No. 3,645,330. © 2004 McQuay International. All rights reserved throughout the world. Bulletin illustrations cover the general appearance of McQuay International products at the time of publication and we reserve the right to make

changes in design and construction at anytime without notice.

2

A New Standard in Rooftop Systems with Evaporative Condensers• 75 through 150 tons.• Full factory operation test.• 100% make-up air, dehumidification, VAV or CV

operation.• Modular construction and customized application

flexibility.• Multiple fan, coil, filter and heat selections. High

efficiency compressor and coil combinations.• Factory integrated and commissioned MicroTech II™

advanced DDC control system.

• McQuay’s innovative Protocol Selectability™ feature provides building automation system interoperability with BACnet® and LonMark® communications capability.

• Durable, double-wall construction with access doors on both sides of each section.

• Heavy-duty evaporative condenser designed for easy maintenance with a walk-in service compartment

• Blow through configuration for high sensible cooling and quieter operation.

• Draw through configuration for high latent cooling or high humidity applications.

Agency Listed

Nomenclature

MEA368-93-N

Manufactured in a ISO-Certified

Facility

R P E - 150 C S E

RoofPak

Unit ConfigurationP = Blow through CoolingD = Draw through Cooling

Evaporative Condensers

Heat MediumA = Natural GasE = ElectricS = SteamW = Hot WaterY = None (Cooling Only)

Design VintageNominal Capacity (Tons)RPE, RDE: 076, 089, 100, 110, 130, 140, 150

Cooling Coil SizeS = Standard (Low Airflow)L = Large (High Airflow)

2 Catalog 219 Catalog 219 3

SuperMod High Turndown Gas Burner• Full 20:1 turndown and multiple sizes

enable precise temperature control at reduced design, installation, and life-cycle costs.

• Maintain comfortable tenant environment in VAV, 100% make-up air, and dehumidification applications.

MicroTech II™ Control System• Factory-installed and tested to

minimize costly field commissioning.

• Protocol Selectability™ feature for easy integration into the BAS of your choice using open, standard protocols such as BACnet® or LonTalk®.

• Easily accessed for system diagnostics and adjustments via a unit mounted keypad/display (optional remote keypad).

• Minimum outdoor air and humidity control logic for fresh air intake and optimum humidity levels.

Return or Exhaust Fans • Return fans can provide better building pressure and

ventilation control as return duct pressure drop increases.• Exhaust fans can save energy as return duct pressure

drop requirements decrease.

Factory-Mounted Variable Frequency Drives

• Control fan motor speed for lower fan operating costs and sound levels in VAV systems.

Airfoil Fans• More energy efficient and quieter

than forward curved fans.• Double width, double inlet (DWDI) or

single width, single inlet (SWSI) plenum fans.

Economizer• Outside air enters from both

sides, improving mixing for better temperature control.

• DesignFlow™ Precision Outdoor Air Measurement and Control System accurately measures and maintains outdoor air quantity.

• Patented UltraSeal™ low leak dampers minimize air leakage, reducing energy costs.

• Generous face area intakes/outlets and control dampers reduce system pressure drops, improving efficiency.

Hinged Access Doors• On both sides of every section for

easy access to all components.• Single lever latch and door

holders provide easy entry and support routine maintenance.

• Double-wall construction protects insulation during maintenance.

Blank Sections• Available throughout the unit to

factory-mount air blenders, carbon or charcoal filters, sound attenuators, humidifiers, or other specialty equipment.

• Allow customization for maximum system performance and efficiency.

• Reduce design and installation costs.

Durable Construction• Pre-painted exterior cabinet panels pass 750 hour ASTM

B117 Salt Spray Test for durability.• Heavy-duty R-6.5 insulation minimizes heat loss for

reduced energy costs.• Double-wall construction protects insulation and provides a

wipe clean surface to inhibit microbial growth.• Stainless steel, sloped drain pans eliminate standing water

and provide long service life.• Full unit base rail with heavy-duty lifting lugs provide single

piece rigging of units up to 150 tons.

Modular Flexibility• Allows you to specify the unit you want, optimized for

high energy efficiency, good IAQ, and quiet operation.

• 100% make-up air, dehumidification, CV, and VAV operation.

• Blow through cooling coil configuration (shown) provides higher sensible cooling, a quiet tenant environment, and energy savings.

• Draw through cooling coil configuration provides higher latent cooling for make-up air systems or systems with high humidity loads.

• Multiple filter, fan, coil, and heating options and sizes to match system requirements.

• Extended face area filters and coils reduce system pressure drops and improve efficiency.

• Multiple high efficiency compressor and coil combinations match system requirements.

• Optional return/supply locations match system configuration requirements at lower installed costs, reduced air pressure drops, and quieter operation.

McQuay’s Unique Features and Benefits

Evaporative Condensing Section• Open design allows easy access to compressors and

refrigerant piping. • Unique rail support system allows the roof deck and insulation

to help block compressor noise from entering the building.• Replaceable, slide out condenser tube bundles .• Replaceable, slide out, sectional, sloped stainless steel sump.

Heaviest piece weighs less than 175 pounds.• Entire spray chamber is enclosed in stainless steel.• Replaceable mist eliminators.• Replaceable air inlet screens.• Vertical discharge propeller condenser fans with service

guards reduce noise. • PVC spray system with spray pump, water treatment

connections and float control automatically maintains acceptable water levels.

• Replaceable, clog resistant nozzles completely wet the coil surface.

Walk-in Service Compartment• Ventilation fan with a manual shutter allows conditioned air into the

service compartment for comfortable servicing in hot weather. • Lights, electrical outlet, condensing section electrical panels, spray

pump, water connections, and space for water treatment systems and chemical tanks.

• Drain pan under the water piping and a raised floor grate in the pan keeps the walking area dry.

• Single field connections to make-up water and drain lines.

4 Cat 219

Energy Savings

Evaporative Condenser Energy SavingsAir cooled condensers can only reject heat to the ambient dry bulb as the condenser air passes over the condenser surface. Typical design dry bulb temperature is often considered to be 95°F. However, actual rooftop dry bulb conditions are usually much greater due to solar heat on a dark roof. See Figure 1.

Figure 1: Air-Cooled Condenser

Evaporative condensers use a cooling spray of water that evaporates and cools the condenser air down toward the typical ambient wet bulb temperature of 75°F. See Figure 2.

Evaporative condensers, therefore, reject heat to colder temperatures and operate at lower condensing temperatures. Therefore less compressor work and energy are required.

This allows compressors in an evaporative condensing unit to operate at lower condensing temperatures and consume 25-40% less electricity than comparable air cooled units, especially at design conditions. Refer to Table 1.

Figure 2: Evaporative Condenser

Table 1: Air-Cooled vs. Evaporative-Cooled

Condensers

Rooftops with Evaporative Condensers Save Money In Three Ways

1. Savings In Electrical Consumption Costs

Both consumption and demand usually drive the electrical costs for large, non-residential customers. Electrical consumption is the total energy consumed and is usually measured in kW Hours. Several factors influence consumption, including unit efficiency, operating hours, and load profile. McQuay's Energy Analyzer™ computer program is the ideal tool for estimating energy consumption for a given building.

2. Savings in Electrical Demand Costs

Electrical demand is the peak energy consumed in a billing cycle and is usually measured in kW. Demand costs

95/75Air

Heat TransferSurface Cooledby 95°F Air

CondenserSurface

Design Conditions

Ambient Temperature

Condensing Unit kW per ton

Condensing Temperatures

ARI Design Conditions

Air Cooled 95°/ 75°F 1.15 - 1.20 125 - 135° F

Evaporative Cooled

95/75° F 0.84 - 0.88 105 - 115° F

Desert Design Conditions

Air Cooled 110°/72° F 1.35 - 1.40 135 - 145° F

Evaporative Cooled

110°/72° F 0.82 - 0.86 102 - 112° F

Heat Transfer Surface

Cooled by 75°F WB

Within the Spray

CondenserTubes

95/75Air

Cat 219 5

associated with air-cooled and evaporative-cooled rooftops are relatively easy to compare.

a. The 25-40% reduction in peak design condensing unit kW translates into a 25-40% savings in con-densing unit demand costs. Based on utility rate structures, this can be a substantial savings.

b. In addition, McQuay offers airfoil supply and return fans that reduce design BHP and air handler demand costs by up to 20%.

3. Savings in Installation Cost

Rooftop ampacity and electrical service costs are proportional to design KW. A 25-40% reduction in condensing unit design KW translates into smaller and less expensive wires, disconnects and transformers that feed the rooftop units. McQuay's airfoil supply and return fans often save one or two motor sizes and further reduce the required electrical service.

Typical Savings vs. Air-Cooled Rooftop Systems*

To illustrate the savings generated by evaporative condensing, consider a two-story shopping mall using several 125-ton VAV rooftop units and occupied 365 days a year. Assume external static pressures of 2.5" for each supply duct and 0.5" for return ducts. Tables 2 through 4 show the McQuay RPE evaporative condenser rooftop if this mall is located in the Los Angeles, New York and Las Vegas.

Table 2: Comparison of Evaporative and Air-Cooled

Condensing For Los Angeles Area Mall.

* All shopping mall energy analysis and comparison charts pro-

vided in this document have been generated using McQuay

Energy Analyzer™ software.


Condensing For New York Area Mall.


Condensing For the Las Vegas Area

McQuay RPE energy costs are Competitive with any HVAC system - Even Water-Cooled Chillers

Using the 0.85 kW/ton condensing unit efficiency from the previous example, Figure 5 shows a comparison of a McQuay RPE evaporative condenser rooftop system with a 0.55 kW/ton water-cooled chiller system. In this case, we assumed that the chiller system would have constant flow pumps and that it unloads to 0.46 kW/ton.

As shown in Figure 5, the energy performance of the two systems is very comparable, with the RPE offering a significant part load advantage and the chiller offering a small full load advantage. Given that most air-conditioning systems operate at 60% load or less over the great majority of a typical year, the McQuay RPE may be the best energy savings investment.

Table 5: Comparable Energy Performance to Water-Cooled Chillers

Conditions Air-CooledMcQuay

RPE

Design Ambient Dry Bulb/Wet Bulb 95°F/72°F 95°F/72°F

Electrical Consumption Rate (per kW Hour) $0.15 $0.15

Electrical Demand Rate (per kW) $24 $24

Condensing Unit

Efficiency (kW/ton) 1.15 0.85

Electrical Cost $30,200 $22,100

Percent Savings 27%


RPE




Condensing Unit



Percent Savings 31%


RPE




Condensing Unit



Percent Savings 40%

0%

% Load

20% 40% 60% 80% 100%0

0.3

0.6

0.9

1.2

1.5

Co

mp

res

so

r S

ys

tem

KW

Per

To

n

Water Cooled Chiller

RPE

6 Cat 219

McQuay Energy Analyzer™ Software Program

McQuay Energy Analyzer is the perfect tool for quantifying the savings that can be generated by evaporative condensing. Energy Analyzer software can model energy consumption for almost any type of building based on local climate and utility costs.

Using Energy Analyzer to Quantify Savings

Go To The Primary System Screen

1. Click On The Condensing Unit

2. Click On Air Cooled Or Evap Cooled

3. Check The Defaults

For access to McQuay Energy Analyzer Software, contact your local McQuay representative for a copy. To locate your McQuay representative, visit mcquay.com or call (800) 432-1342.

Energy Analyzer - Primary System Screen

1 13

2

Cat 219 7

FeaturesMcQuay RPE and RDE units contain the same air handler construction and controls as McQuay RPS and RDT applied rooftop units. For more detail, refer to RPS Catalog 214 and RDT Catalog 217. For a copy of these catalogs, contact your local McQuay representative or visit mcquay.com.

Refrigeration Circuit

• Open condenser design allows easy service access to compressors and refrigerant piping.

• Multiple high efficiency Copeland Discusá compressors mounted on isolators with crankcase heaters, positive displacement oil pump, low oil pressure protection control, 3-leg internal motor protection and cylinder unloaders for up to 8 steps of capacity control.

• Dual refrigerant circuits include manual shut off valves on the suction, discharge and liquid lines, accessible sight glass, filter drier and solenoid valves (expansion valves are included in the air handler section). The controls include high and low refrigerant pressure protection control switches, manual control switch, and manual pump down switch.

• Compressors are allowed to operate down to 45° F ambient, where economizer ‘free cooling’ operation takes over.

Evaporative Condenser

• Unique rail support system allows the roof deck and insulation to help block compressor noise from entering the building.

• Replaceable, slide out condenser tube bundles are constructed of corrosion-resistant copper tubes, stainless steel casing, and polymer tube sheets.

• The sloped, stainless steel sump is divided into multiple sections that slide out for easy replacement. The heaviest section weighs less than 174 pounds.

• The entire spray chamber is constructed of corrosion-resistant stainless steel.

• Replaceable mist eliminators between the tube bundle and condenser fans minimize water consumption.

• Replaceable air inlet screens keep sunlight out of the sump and help prevent microbial growth.

• Direct drive condenser fans eliminate the service expense associated with belts and sheaves.

• Vertical discharge, propeller condenser fans with service guards reduce horizontal-radiated noise.

• 3-phase, severe duty, totally enclosed condenser fan motors with current sensing overload protection and permanently lubricated bearings support extended product life.

• PVC spray system includes spray pump, water treatment connections and float control that automatically maintains acceptable water levels. Replaceable, clog resistant nozzles spray water across a 150° arc and completely wet the coil surface for improved performance. Single field connections to make-up water and drain lines can reduce installed cost.

Figure 3: Standard RPE and RDE Spray System (See Figure 4 on page 12 for Water Treatment Enhancements)

Water TreatmentConnections

Manual Bleed OffSolenoid Valve

Manual Shut Off Valve

To SanitarySewer

RemovableScreen

Pump

Sump

Automatic Float ControlledIntake Valve

Hose Bib withManual Shut OffValve

Intake Water

Spray

8 Cat 219

Corrosion Resistant

Easy Service Access

Walk-in Service Compartment

• All routine refrigerant service can be performed inside the walk-in service compartment away from compressor noise and outdoor conditions.

• Contains marine lights, electrical outlet, condensing section electrical panels, spray pump, water connections, and space for water treatment system and chemical tanks.

• A thermostat-controlled ventilation fan turns on at 75°F and a manual shutter draws conditioned air into the service compartment for comfort. These features provide more comfort for service even in hot weather.

• A hose bib is provided as standard in the make up water line to aid in condenser cleaning.

• A drain pan under the water piping and a raised floor grate in the pan help keep the walking area dry.

• Optional unit heater for cold climate use.

• No compressor noise is generated in the work area.

• Sight glass, filter driers, solenoid valves and charging valves are in the service compartment.

Walk-In Service Compartment

Stainless Steel Spray Enclosure

PVC

Spray

Tubes

Stainless

Steel Sump

Copper

Tube Bundles

Polymer Tube Sheets

Stainless Steel Fan Decks with

Severe Duty Motors and

Corrosion-Resistant Fans

Walk In

Service

Compartment

Access Doors

on Both Sides

Replaceable Nozzles

with 150° Spray Arc

Replaceable, Slide Out

Tube Bundles

Replaceable

Sump

Easy

Compressor

Access

Access to Most

Electrical Components

Perform Most Refrigerant Service in Comfort, Away From Compressor Noise

Raised Floor Grate and Drain Pan

Charging, Suction,

Discharge & Liquid

Schrader Connections

Solenoid, Sight Glass

& Filter Drier

Hot Gas

Bypass

Valves

Space for

Water

Treatment

Marine Lights Exhaust Fan

Optional Unit

Heater

Cat 219 9

Cabinet

• Weather resistant skin is made of pre-painted, galvanized steel that successfully withstands a 750 hour salt spray test. The service compartment walls are double wall with R6.5 insulation sandwiched between the outer skin and inner liner. The air handler cabinet is also available with double-wall construction with R6.5 insulation.

• Full-sized, double-wall, hinged access doors are provided on each side of the section, complete with a single lever latch.

• Heavy gauge galvanized steel base with a formed recess sits on the gasketed curb and provides a weather tight seal. The base also includes strategically placed lifting brackets to allow balanced cable or chain hook lifting.

Air Handling Section

• Factory piped, charged and tested refrigeration system comes complete with an aluminum fin, copper tube, DX coil with expansion valves and distributors. Each distributor tube is wrapped in plastic to help prevent refrigerant leaks.

• DX coils feature interlaced circuiting to keep the entire coil face active during all capacity steps and eliminate the air bypass associated with face split coil designs. An intermediate drain pan collects condensate from the top half of the coil. Drain tubes run from the intermediate drain pan to the sloped, galvanized [optional stainless] steel drain pan.

• High efficiency airfoil supply fans require less BHP and generate less noise than forward curved fans at the medium static pressures typical of large VAV units. Fans are available in both DWDI (housed) and SWSI (plenum) fan arrangements. For more information, refer to page 14 through 16.

• Insulated supply and return air plenums with bottom [optional horizontal] openings reduce ducted noise levels. A double wall option is available with perforated liners in these sections

Airfoil Fans

Electrical and Controls

• Single source power with optional, non-fused disconnect switch with control panel door interlock.

• Individual short circuit protection for each compressor, supply fan and return fan motor. Condenser fan and exhaust fan motors are also provided with short circuit protection.

• All control panel wiring is labeled per the wiring diagram and all 115-575 volt wiring is housed in conduit or metal raceways.

• MicroTech II™ control system with state of the art control sequences communicates with BAS systems through Protocol Selectability™. This allows any building automation system (BAS) to communicate with MicroTech II over an industry standard network and obtain access to the operating status, all set points, and alarms.

• LONMARKá certified discharge air control (DAC) or space comfort control (SCC) communication options.

• BACnetá compliant communication options.

• MicroTech II is available in several temperature control modes.

• LONMARKá certified Space Comfort Control [SCC] for single zone, constant volume applications; including 100% make-up air application.

• LONMARKá certified Discharge air temperature control [DAC] for VAV or constant volume applications. Static pressure control of the supply fan and return/ exhaust fan can also be included.

• Time clock, lead lag, morning warm up, night set back, economizer pre-cool and flexible reset are all standard.

• Published integration instructions for both forms of communication.

• Unit mounted keypad and 4-line by 20-character display provide an enhanced user interface.

• Compressor head pressure control that reliably cycles the condenser fans from sump temperature down to 45° F ambient.

• Duct high pressure safety on all VAV units.

MicroTech II Keyboard

10 Cat 219

Factory Installed and Wired OptionsThe RPE and RDE contain the same air handler construction and controls as the RPS and RDT units. For complete detail refer to RPS Catalog 214 and RDT Catalog 217. For a copy of these catalogs, contact your local McQuay representative or visit mcquay.com.

Condensing Section

• Compressor spring isolation with suction and discharge line vibration absorbers.

• Extra compressor unloaders that provide 6 stages (size 76-100) or 8 stages (size 110-150) of capacity control.

• Compressor part winding start to reduce inrush current.

• Replaceable core filter driers.

• Hot gas bypass on one or both refrigerant circuits.

• Electric sump heater that helps prevent the sump from freezing in cold weather. Heat tape is also included for the sump drain and supply water lines.

• 1.5 kW electric unit heater and ambient on-off thermostat for the service compartment

Air Handling Section

• Multiple fan and coil options optimize reliability, efficiency, sound performance and first cost for varying CFM per ton operation. Units can be selected for make-up air applications.

• Economizer systems come standard with outdoor and return air damper leakage rates of less than 0.5% at 1.5" static pressure. Economizers are available with the following value add options.

• Patented DesignFlow™ minimum outdoor air measurement and control system that is independently certified to control ventilation air within +/- 5% of set point from 1,594 to 37,126 CFM of outdoor air.

• Static air mixers that provide optimum uniformity in mixed air temperature and reduce the chances of freezestat trips and localized coil freezing.

DesignFlow™

• Economizers are available with return fans or exhaust fans.

• SWSI airfoil return fans provide better building pressure and ventilation control on ducted returns.

• Multiple propeller exhaust fans may save energy on low-pressure drop, ceiling plenum returns.

• see “Economizer, Return Fan and Exhaust Fan Application” on page 15.

• Variable frequency RAF and SAF drives for VAV control (exhaust fans always include a variable frequency drive).

• Supply and return fan belt guards.

• Spring isolation (with optional seismic construction).

• Cooling coils are available in blow through and draw through arrangements to optimize the use of fan and motor heat. See Figure 12 on page 18.

• In blow through arrangements (RPE only), fan energy pre-heats the mixed air temperature before entering the cooling coil, providing greater sensible capacity and colder supply air temperature for a given compressor capacity.

• In draw through units, fan energy re-heats the air leaving the cooling coil. Draw through systems provide greater latent cooling capacity, lower sensible heat ratios.

• Gas and electric heat are available on RPE units with the following options.

• Two-pass drum and tube heat exchanger with, fully modulating, FM approved burners for 3 to 1 or 20 to 1 (patented SuperMod™) turn down and optional IRI approval. Drum and tube heat exchangers feature all stainless steel construction. Selections are available to handle up to 100°F temperature rise.

• Low watt density, nickel chromium electric heaters with branch short circuit, automatic reset and manual reset safety.

• 1- or 2-row hot water or jet distributing steam coils with optional valve control and optional freezestats.

• Supply fan sound attenuators with or without mylar coating of the acoustic insulation (RPE only).

• Generous face area, 2" pleated, 30% efficient panel filters and/or 65 or 95% cartridge filters are available Cartridge filters can be in the final, last in air flow position for hospital or laboratory applications (RPE only).

• Blank sections can be added for field-installed devices such as humidifiers and integral face and bypass coils.

• Ultraviolet Germicidal Irradiation (UVGI) lamps are available factory installed in all RDE/RPE units to cleanse cooling coils and drain pans. The UVGI lamps irradiate the cooling coil and drain pan surfaces with light in the 254-nanometer wavelength of the light spectrum (UV-C). UV-C light has been proved effective in killing most bacteria, molds and viruses in both laboratory and practical application. In addition, the continuous “cleansing” action of the UV-C light also serves to continuously clean the coil and drain pan, improving long-term performance and reducing coil/drain pan maintenance. The completed package of McQuay equipment and UVGI lights includes Intertek Services Inc. (ETL) safety agency certification.

Cat 219 11

Electrical and Controls

• Smoke detectors in the supply and/or return air openings.

• Marine lights in the supply and/or return/exhaust fan sections.

McQuay MictroTech II™ Rooftop Remote User Interface

Each remote user interface is identical to its unit-mounted counterpart and offers the same functionality, including:

• Touch sensitive key pad with a 4 line by 20 character display format.

• Digital display of messages in English language.

• All operating conditions, system alarms, control parameters and schedules are monitored.

Features

• Can be wired up to 1,200 feet from unit for flexibility in placing each remote user interface within your building.

• Unit-mounted switch enables the remote user interface during normal operation or the unit user interface for maintenance and service.

Benefits

• Allows you to access the user interface for each unit from one location, inside the building.

• Users need to learn one format because the remote user interface is identical to the unit-mounted version.

McQuay MicroTech II™ Multiple Air Handler Control (MAC)

The MAC provides control coordination for multiple Rooftops serving a common space or feeding a common ductwork system.

The MAC manages each group of units to operate in concert. Individual unit controls cannot reliably handle parallel units because the controls fight each other at part load. Inevitably one unit overpowers the other.

Benefits of Parallel Units on a Common Duct

• Improved system reliability as units and sensors can provide redundancy if a sensor or unit require maintenance.

• Lower first cost from increased diversity resulting in lower installed tonnage.

• Lower installed cost due to fewer roof penetrations and less floor-to-floor ductwork.

• Improved space temperature control from smaller cooling stages relative to load and reduced compressor cycling.

Field-Installed Roof Curbs

• Constructed in accordance with NRCA guidelines using 12-gauge galvanized steel.

• Fits inside the unit base around the perimeter of the air handling section and service compartment.

• Duct frames are provided to allow duct connections to be made to the curb before the unit is placed. The unit seals to the duct frames.

• Ship loose gasket seals between the unit and curb.

• Separate condensing unit support rail allows an open condensing unit design and minimizes compressor noise and vibration transmission through the roof.

Common

Supply Duct

MAC Panel

Remotely

Mounted

IndoorsCommon

Return Duct

12 Cat 219

Optional Water TreatmentAll evaporative condensing products require water treatment systems for proper operation. The water treatment system serves the following purposes:

• Controls organic contamination

• Reduces condenser fouling and corrosion

• Reduces cleaning frequency and water usage

Overview

McQuay RPE/ RDE units come with a spray system, pump, sump strainer, automatic float controlled intake, and manual bleed off as standard.

McQuay offers a basic water treatment option that includes the following factory-installed features:

• Controlled bleed off

• Digital controller and sensors

• Combination corrosion and scale inhibitor, chemical tanks and feed system

• Biocide chemical tank and feed system

If the McQuay basic water treatment option is not purchased, then an equal system must be field installed (manual bleed off is not recommended).

The following water treatment enhancements are offered for more severe applications.

• Intake and bleed off, water meters

• Side stream cyclone separator

• Corrosion sensing coupons

Bleed Off and Water Consumption

Controlled bleed off [or blow down] is required on McQuay RPE/ RDE units as it should be with all evaporative condensing products. It involves draining off a portion of the highly concentrated water from the bottom of the sump and replacing it with lower concentration make-up water to prevent scale. Scale protection is required because the evaporation process leaves behind solids (scale) that will coat the heat exchanger surfaces and sump. This reduces the capacity, efficiency, and life expectancy of the equipment.

Manual bleed off occurs whenever the spray pump operates and a manual valve adjusts flow. This inevitably bleeds off too much [increased water costs] or too little [risking scale build up] water. Controlled bleed off is included with the McQuay water treatment controller. The concentration of scale forming solids is measured by water conductivity and the control opens or closes a solenoid to allow the proper amount of bleed off. The conductivity set point should be adjusted based on water analysis to maintain a desired cycles of concentration.

Figure 4: McQuay Water Treatment Option

Bromine

Corrosion& ScaleInhibitor

Controllerwith 3Sensorsto ControlBothSolenoids

Flow

Conductivity

ORP

OptionalInternetConnectionDrain Solenoids

(not shown) openduring freezingconditions

Optional Water Meters

Corrosion Sensors

M

M

M

CS

CS

OptionalCycloneSeparator

HandValve

ControlSolenoid

Automatic Bleed OffSolenoid Valve

To SanitarySewer

PumpIntake Water

Spray

RemovableScreen

SumpSump

Automatic Float ControlledIntake Valve

Hose Bib withManual Shut OffValve

Cat 219 13

Theoretical water consumption required for proper heat rejection is 1.8 gallons per ton hour. All of this water evaporates and none goes into the sewer. An additional 0.6 to 0.9 gallons per ton hour is also required for make up and bleed off. The exact amount should be determined by water analysis. The RPE/ RDE includes a float valve and solenoid that automatically refills the sump as required.

Bleed off must be handled in accordance with local codes and normally is drained into the sanitary sewer. This water should never be drained onto the roof or into a storm drain. Because most water utilities charge for both intake and sewer water flows based on intake meter readings, sewer charges may be reduced if sewer flow is proven to be less than water intake. McQuay offers both intake and bleed off water meters to document reduced sewer flow [confirm details with your local utility]. These meters are not included in the basic water treatment option.

Particle Control

Particle filtration is required to remove dirt and debris that collects in the spray water. A large face area sump strainer is included in the sump drain that prevents debris from entering the pump and spray system. The sump strainer can easily be removed and cleaned. A hose connection is included, upstream of the float valve, so that sludge can be washed out of the sump as needed.

For areas where airborne dirt and debris are more severe, a side stream cyclone separator can be added when the McQuay water treatment control is purchased. About 10% of the flow is diverted to the separator. Collected particles are purged in conjunction with controlled bleed off that is included in the McQuay water treatment controller.

Figure 5: Figure - Centrifugal Solids Separator

Controller and Chemical Treatment

The McQuay water treatment option includes a controller, sensors, chemical feed equipment, interconnecting piping, and control wiring. The McQuay water treatment option can be enhanced to simplify its operation and the supply of chemicals for your RPE or RDE unit.

• Water analysis is available to allow optimum setting of controller set points, water bleed off rates, and chemical feed rates.

• Chemicals can be ordered and shipped to the job site.

• An optional Internet card for field Internet connection is available to support 24/7 remote monitoring of chemical levels and water quality. Consult you local McQuay Representative for contact information.

• Precisely selected and weighed metals (corrosion coupons) can be placed in the spray water. The weight reduction of these coupons over time is measured to reveal corrosion problems before they are severe.

The spray systems use only PVC, copper and stainless steel materials, but corrosion can occur if proper water treatment is not provided. McQuay offers a chemical treatment system with a combination scale and corrosion inhibitor that increases the water solubility limits, helps protect against scale, reduces bleed off water requirements and helps protect the system metals from corrosion. The inhibitor treatment products do not simply dissolve. The products are encapsulated in a proprietary coating that allows the chemistry to diffuse into the system water. This diffusion rate is highly predictable and the release rate is constant over a 33 “operating” day period as long as the product is in water. Chemical treatment demand for the “operating” period is calculated based on water quality which determines the amount of chemicals to be added.

Figure 6: Dry Chemical Injection System

Microbial protection is required to help prevent heat exchanger and spray system fouling and corrosion. The McQuay Controller meters dry chemicals [such as bromine] into the spray water through a solenoid to maintain sufficient oxidation-reduction potential [ORP] and kill microorganisms. Bromine is recommended because it is easy to handle and microorganisms do not develop immunity to oxidizing biocides.

14 Cat 219

Application ConsiderationsThe RPE and RDE require many of the same application considerations as McQuay RPS and RDT units. More detail is provided on pages 11-12 and 23-29 in RPS Catalog 214-5 and RDT Catalog 217-5. For a copy of these catalogs, contact your local McQuay representative or visit mcquay.com

General• Intended for normal HVAC use. Consult factory if

cataloged operating range is exceeded, such as make up air. Compressor cooling below 45° F is not allowed.

• Rig the unit in accordance with the instructions provided in the Installation Manual IM-791. Split units are available to reduce rigging weight and may be required if the total length exceeds 52 ft. For a copy of IM-791, contact your local McQuay representative or visit mcquay.com.

• Fire dampers may be required by code. They are not included.

• Qualified Start up of the unit in accordance with the IM-791 is required.

• Clean off any road chemicals, such as winter salt, when the unit is received.

• Proper water treatment must be provided before unit start-up.

Location and Curb/ Rail Support• The structural engineer must verify that sufficient roof

strength is provided.

• Maximum unit pitch is 1/16 in. per foot. Curbs or supporting rails must be rigidly supported along the entire length of the unit to prevent deflection that results in door interference.

• Gaskets must be installed between the curb and the unit, per IM-791.

• Curbs must be installed per NRCA guidelines. see “Roof Curbs” on page 48.

• Avoid locating the unit near any heat source, exhaust, smoke stack, or any source of air-borne particles or chemicals.

• Local codes must be followed regarding fastening the unit to the curb/ rail and the curb/ rail to the building. This is especially critical in higher risk, hurricane or seismic zones.

• Refer to the “Acoustics” section below to avoid noise and vibration problems.

• McQuay curbs include supply and return opening support frames and perimeter channels that seal to the unit as it is placed on the curb. Therefore, duct connections can be made to the curb before the unit is placed.

Acoustics Ducted and radiated sound power ratings are available from your local McQuay sales representative. The designer is responsible for addressing these sound levels.

The following guidelines will help to achieve the desired sound levels in the occupied space.

• Locate the unit as far away from sound sensitive areas as possible. Refer to the “Location and Curb/ Rail Support” section.

• Minimize supply and return fan TSP and select the fan as close to peak efficiency as possible. Avoid the “do not select” areas on the fan curve. McQuay offers several different fans per model size to allow for various design conditions. Refer to “Fan Performance Data” on page 38.

3 different sound paths from the unit to occupants and/or neighbors must be considered.

1. Radiated Path

• Use a concrete deck or pad when the unit must be located over sound sensitive areas. If this isn't possible, provide extra acoustical insulation under the condensing unit.

• Only the supply and return ducts, and the essential plumbing and electrical connections should penetrate the acoustical insulation or roofing below the unit. The outside perimeter of the ducts must be sealed after they are installed.

• If a built-up roof with metal decking is used, then the area inside the curb perimeter requires special attention:

• Provide an inverted 6" channel around the inside perimeter of the curb and seal to the curb.

• Acoustical insulation must be installed above the decking and the 6" channel.

2. Vibration Path

• Locate the unit's center of gravity close to a main support beam to minimize roof deflection and vibration transmission into the building.

• McQuay offers 2" deflection, supply and return fan spring isolation or rubber in shear isolators. The rubber in shear isolators should only be used when vibration isolation is clearly not required in the rooftop, such as when the unit is mounted on spring isolated curbs, spring isolated rails or the ground.

• McQuay offers compressor spring isolation, including the necessary refrigerant line vibration eliminators.

• Internal spring isolation options may be insufficient for some applications. Spring isolation of the entire unit may be required.

3. Air-borne path through the supply and return openings

• Use 2003 ASHRAE Fundamentals Chapter 43 to help reduce ducted noise and minimize duct turbulence. Maintain straight ducts to and from the unit and avoid abrupt changes in duct size and direction. Avoid turns opposed to the fan wheel rotation. If 90° elbows are required, use turning vanes.

• Use as much insulated return duct as possible and include at least one elbow and 15' of length. Maximum recommended velocities are 1000-1200 fpm.

• Allow for duct break out and use oval or round duct whenever possible.

Cat 219 15

• Insulate the first 20' of supply duct. The first 20' of rectangular duct should be routed over non-sensitive areas and avoid large aspect ratios. Maximum recommended velocities are 1800-2000 fpm.

• McQuay offers factory-installed discharge plenums with optional perforated liners. The plenum provides several dB of attenuation and discharges the air at a more uniform, relatively low velocity. Ducted supply noise can be further reduced by adding optional sound attenuators between the supply fan and the unit discharge.

• Route the return air path through the length of the curb to add distance between the unit return opening and the building return opening.

Economizer, Return Fan and Exhaust Fan ApplicationRooftop economizer applications usually require return or exhaust fans to properly control building pressure and maintain minimum ventilation. McQuay offers both exhaust and return fan capability. They are not generally interchangeable for a given design. In general:

• Return air fans (RAF) should be used on ducted return systems [return ESP exceeds 0.4 - 0.5 in.]

• Properly selected propeller exhaust air fans (EAF) can successfully operate and save energy on open return systems [return ESP is less than 0.4 - 0.5 in.]

• Supply air fan (SAF) selection depends on whether a return or exhaust fan is used.

• RAF system-SAF handles only the supply ESP at design.

• EAF system-SAF handles both the supply and return ESP at design [EAF is off.]

Figure 7 illustrates why supply fan only units have problems, especially as return ESP increases.

• No exhaust will occur from the rooftop because the economizer section must be at a negative pressure.

• The air balancer must adjust the outdoor air damper to generate large pressure drops at minimum ventilation settings [about 0.9" in Figure 7.]

Figure 7: Supply Air Fan Only System Static

Pressures with 1” Return Duct ESP

Figure 8 illustrates how the addition of a return fan corrects these problems. The return fan is responsible for return system ESP and maintains a slightly positive pressure in the economizer section [about +0.1 in. in

Figure 8.] to allow for exhaust air control and a more suitable outside air intake pressure.

Figure 8: RAF System Allows Proper Exhaust and

Outdoor Air Control

Exhaust fans are very different than return fans and can not maintain proper building pressure and ventilation control as return ESP increases.

• Exhaust fan systems are intended to save energy by having the fan 'off' during non-economizer operation. During these minimum outdoor air conditions, the system essentially acts like a supply fan only system.

• With the exhaust fan off, there is no device available to maintain a positive pressure for relief, the mixed air plenum goes to an accentuated negative pressure condition affecting minimum ventilation air control and space pressure is no longer under control.

An exhaust fan's performance weaknesses diminish as return ESP decreases. Properly selected and controlled propeller exhaust fans can successfully operate and save energy at reduced return ESP designs.

• At system operating conditions where a single fan can be used successfully, it generally will be more efficient than operating series fans under the same total load. When the exhaust fan turns off, the supply fan can efficiently handle both the supply and return duct loads.

• At the relatively high CFM, low static pressure conditions of exhaust/return application, exhaust fans can be selected closer to their peak design efficiency than can full return fans. This allows them to run more efficiently throughout their operating range. Therefore, when return duct losses don't dictate the use of a return air fan, exhaust fans are an efficient alternate.

Filters• Filters should be replaced on a regular basis to avoid

excessive pressure drop increases, especially on high efficiency cartridge filters.

• Fan selection must consider dirty filter losses. Using a filter pressure drop midway between clean and dirty values is recommended unless maintaining minimum CFM is critical.

• McQuay RPE units offer last in air stream “final” filters. They require special consideration.

• The McQuay design uses full double wall construction down stream of the final filters.

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16 Cat 219

• Cooling coils must be in the draw through position.

• Final filters down stream of gas and electric heaters must be rated for 500° F temperatures. Maintenance personnel must use properly-rated replacement filters.

Variable Air Volume (VAV)McQuay Rooftop VAV options include everything required to provide the full advantages of true shut-off VAV. Bypass VAV systems do not offer any fan energy savings at light load.

• Variable Frequency Drives for all indoor fans maximize part load fan efficiency and minimize fan sound generation.

• Indoor fan volume control based on supply static pressure and building pressure.

• Up to 2 supply duct sensors to properly respond to building diversity (such as east-west variation).

• Constant discharge temperature control.

Shut-off VAV offers the following advantages.

• Reduces first cost and energy due to building diversity.

• Reduces indoor fan energy requirements at light load.

• Provides the opportunity for efficient multiple zone control from a single unit and to match changing occupancy demands.

• VFDs turn down in accordance with Figure 9.

Figure 9: VFD Turndown

The benefits of McQuay airfoil fans are particularly applicable to VAV applications.

• Better efficiency and less noise at the medium static pressures associated with VAV.

• Airfoil fans are much more forgiving than forward curved fans if unexpected variations in ESP occur.

• They are “non-overloading” (BHP is fairly constant for a given RPM) and require less safety factor in motor selection.

• They have steeper RPM lines (less variation in CFM for a given variation in ESP).

• Multiple forward curved fans are often used and they risk unstable fan paralleling at light load.

MicroTech II™ controlSupply fans are controlled to maintain constant supply duct static pressure.

• Run pressure-sensing tubes to the desired location (generally at the end of the main trunk).

• Use a second sensor when there is more than one main trunk, multiple floors, or significantly varying zones (such as east and west sides of a building).

Return / exhaust fans are controlled to maintain building pressure in one of two ways.

• McQuay's exclusive Vanetrol™ supply/return fan tracking is generally preferred. Vanetrol is adjusted at system air balance to maintain proper building pressure throughout the expected loading conditions. This reduces the effect of wind, climate variation and doors opening and closing.

• Direct building sensing control is available for exhaust fans or any return fan application that cannot predictably track the supply fan.

McQuay generally offers more steps of compressor capacity control than the industry norm, as well as HGBP, and these capabilities should be included on VAV applications to minimize variations in duct temperature.

Unit Operating Range (CFM and Temperature)

Fan Operating Range

The acceptable system operating range of the McQuay rooftop unit is determined by all of the following characteristics. Each of these limiting factors must be considered for proper performance and component design life.

1. Unstable fan operation

2. Maximum fan rpm

3. Maximum cabinet static pressure

4. Maximum face velocity (cooling coil is most important)

5. Minimum furnace or electric heater velocity

6. Turndown capability on VAV applications

7. Compressor operating pressures

Figure 10 on page 17 illustrates these limiting factors with the exception of items 6 and 7. The shaded area indicates the design operating range of the fan. For optimal efficiency, select fans as close to the fan’s peak static efficiency line as possible. This line is the first system curve to the right of the unstable line illustrated. VAV fan selections must also allow for keeping the fan away from the “do not select” area at minimum design CFM.

Cat 219 17

Figure 10: Fan Selection Boundary

Cooling coil maximum face velocity is based on moisture blow off limitations and laboratory testing.

• 650 feet per minute maximum face velocity for 8 and 10 fin per inch coils.

• 600 feet per minute maximum face velocity for 12 fin per inch coils.

• Cooling coil minimum face velocity is 200 feet per minute for any coil selection. VAV systems must be designed such that this velocity is maintained at minimum airflow.

• Maximum design ambient wet bulb temperature varies per unit, but is at least 85° F. Evaporative condenser units are an excellent choice for high ambient applications.

• The minimum ambient temperature for compressor operation is 45° F. The MicroTech II™ Controller is set to prevent compressor operation below that temperature and use the economizer only when cooling is required at a lower ambient.

Indoor Fan and Motor Heat, Blow Through versus Draw Through Cooling

Indoor fan and motor heat.

• The indoor fan and motor electrical consumption is a sensible cooling load approximately equal to 2.8 MBH per BHP (depending slightly on motor efficiency). This occurs at the fan. See Figure 11 and Figure 12. The fan and motor preheat the mixed air before it enters a blow through cooling coil. The fan and motor reheat the air leaving a draw through cooling coil. Refer also to 2001 ASHRAE Fundamentals Handbook, Chapter 31.

• Fan and motor temperature rise is equal to BTUH / (1.08 x CFM) and is typically about 3° F.

• Due to fan and motor heat placement (Figure 11), blow through coils provide a high sensible heat ratio while draw through coils provide more latent cooling per total ton. Blow through coils achieve a higher sensible heat ratio because they operate with a higher coil approach temperature and a lower entering relative humidity. Conversely, draw through coils cool air at a lower approach temperature and a higher relative humidity, increasing latent cooling.

• Blow through coils effectively provide colder supply air temperatures per ton of air conditioning and

greater sensible heat ratio. This potentially allows a significant reduction in design CFM for buildings with high sensible heat ratios and a resulting reduction in building energy use.

Figure 11: Blow Through vs. Draw Through Concept

Min Furnace,Electric Heat,

or DX Coil Airflow

Max CabinetStatic Pressure

Max RPM

Uns

tabl

e Li

ne

Pea

k St

atic

Effi

cien

cyMax FaceVelocity

Do Not Select

Draw Through Cooling Design

Blow Through Cooling Design

Fan & Motor Heat After Coil

Fan & Motor Heat Before Coil

Fan

Fan

DXCoil

DXCoil

18 Cat 219

Figure 12: Blow Through and Draw Through Performance Comparison

Recommended Clearances

Service Clearance

Allow the recommended service clearances shown in Figure 13. Provide a roof walkway along two sides of the unit for service and access to most controls.

Cooling coil, heat and supply fan service clearance

An additional clearance of 24” is recommended adjacent to the cooling coil, heat, and supply fan sections.

Figure 13: Service Clearances

3° D.T.

Reheat

MAT

3° B.T.

Preheat

Coil EAT Is

DifferentCoil LAT Is

Different

Roof Walkway

24"

72" Service Clearance on4 sides except as indicated

72" Clearance toend of unit or endof outside hood

Adjacent to Cooling Coil, Heat, and Supply Fan Sections.

Cat 219 19

Overhead Clearance

1. Unit(s) surrounded by screens or solid walls must have no overhead obstructions over any part of the unit.

2. The area above the condenser must be unobstructed in all installations to allow vertical air discharge.

3. The following restrictions must be observed for overhead obstructions above the air handler section:a. There must be no overhead obstructions above the

furnace flue, or within 9 inches of the flue box.b. Any overhead obstruction shall not be within 2

inches of the top of the unit.c. A service canopy must not protrude more than 24

inches beyond the unit in the area of the outside air and exhaust dampers.

d. Flue box outlet must extend above any obstructions.

Outdoor Air Intakes

Do not locate outside air intakes near exhaust vents or other sources of contaminated air.

If the unit is installed where windy conditions are common, install wind screens around the unit, maintaining the

clearances specified. This is particularly important to prevent blowing snow from entering outside air intakes.

Ventilation Clearance

Unit(s) surrounded by a screen or a 50% open area fence:

1. The bottom of the screen should be a minimum of 1 ft. above the roof surface.

2. Minimum distance from the unit to screen is the same as the recommended service clearance.

3. Minimum distance, unit to unit - 120 in.

Unit(s) surrounded by solid walls:

1. Minimum distance from the unit to the wall is 96 inches for all sizes.

2. Minimum distance from the unit to another unit is 120 inches.

3. Wall height restrictions:a. No restrictions if there is a wall on one side only, or

on two adjacent sides.b. The wall height is restricted to no more than the unit

height with walls on more than two adjacent sides.

Figure 14: Ventilation Clearances

Maximum AllowableOverhead Canopy Area

9" Min to Flue BoxTypical All Sides

Flue Box

24" Max

24" Max

2" Top of UnitTo OverheadObstruction

20 Cat 219

Control and Power WiringWiring must be done in accordance with the NEC and local code. For wire sizing instructions, see “Supply Power Wiring” on page 53.

• All units require 208-60-3, 230-60-3, 460-60-3, 575-60-3 or 380-50-3 power.

• Size wire in accordance with tables 310-16 or 310-19 of the National Electric Code. Wires should be sized for a maximum 3% voltage drop. Copper conductors must be used.

• Actual voltage at the unit connection must be within +/- 10% of nameplate voltage at all times.

• McQuay offers several power connection options.

• Single power connection with a terminal block or non-fused disconnect are normally the most economical.

• Systems served by emergency generators often require two power connections (with terminal blocks or non-fused disconnects). The generator normally serves only the air handler and controls portion so the condensing unit must be powered separately.

• Each unit is provided with a separate 115-volt convenience outlet that requires a separate power connection per the NEC.

• A second, 115 volt power supply is required to power the optional unit heater for the service compartment.

Most units require a zone temperature sensor for night heat and other functions. The sensor must be properly placed so that its temperature reflects the zone requirements. Avoid outside walls, sunlight and close proximity to supply air or heat generating equipment. A return air sensor can be substituted for the space sensor if necessary.

Altitude AdjustmentsFan curve performance is based on 70°F air temperature and sea level elevation. Selections at any other conditions require the following adjustment for air densities listed in Table 6 on page 20. Higher elevations generally require more RPM to provide a given static pressure but less BHP due to the decrease in air density.

1. Assume 32,000 CFM is required at 3.11” TSP. The elevation is 5000 ft. and 70°F average air temperature is selected. A 40” DWDI airfoil fan is selected.

2. The density adjustment factor for 5000 ft. and 70°F is 0.83.

3. TSP must be adjusted as follows; 3.11” / 0.83 = 3.75”

4. Locate 32,000 CFM and 3.75 on the fan curve. RPM = 900 and BHP = 27.5. The required fan speed is 900 RPM.

5. The consumed fan power at design = 27.5 BHP x 0.83 = 22.8 BHP.

Figure 15: RPE 105C-135C 40 in. DWDI Airfoil

Table 6: Temperature and Altitude Conversion Factors

Air Temp (°F)

Altitude (Feet)

0 1000 2000 3000 4000 5000 6000 7000 8000

-20 1.20 1.16 1.12 1.08 1.04 1.00 0.97 0.93 0.89

0 1.15 1.10 1.08 1.02 0.99 0.95 0.92 0.88 0.85

20 1.11 1.06 1.02 .098 0.95 0.92 0.88 0.85 0.82

40 1.06 1.02 0.98 0.94 0.91 0.88 0.84 0.81 0.78

60 1.02 0.98 0.94 0.91 0.88 0.85 0.81 0.79 0.76

70 1.00 0.96 0.93 0.89 0.86 0.83 0.80 0.77 0.74

80 0.98 0.94 0.91 0.88 0.84 0.81 0.78 0.75 0.72

100 0.94 0.91 0.88 0.84 0.81 0.78 0.75 0.72 0.70

120 0.92 0.88 0.85 0.81 0.78 0.76 0.72 0.70 0.67

Cat 219 21

Freezing ConcernsFreeze protection measures must be taken for any rooftop exposed to freezing conditions. The owner and building designer must take primary responsibility based on the exact climate and installation conditions.

• Drain all condenser water as soon as the climate allows the economizer to provide all required cooling.

• The optional sump heater is recommended to protect the sump if ambient temperatures can drop to freezing conditions (even at night).

Spray system

The spray tree and nozzles are not vulnerable to freezing because water drains out of them when the spray pump is off. Remove the sump drain plug whenever the unit is not in operation to prevent precipitation from building up in the sump and drain.

Two freeze protection options are required to prevent the rest of the spray system from freezing.

1. An optional service vestibule heater provides primary freeze protection of the spray system enclosed in the vestibule. A thermostat turns the unit heater on when vestibule temperature drops to 40°F.

2. A sump heater is a recommended option that includes the following:

• An ambient thermostat-controlled insertion heater for the sump.

• Heat tape, insulation and thermostat for the sump drain.

• Heat tape, thermostat and insulation is included on the high pressure, factory water inlet piping upstream of the float control valve. An additional 10 feet of heat tape is provided to protect field connections. The installer must provide additional heat tape as required and insulate all field piping.

• An emergency drain solenoid opens up whenever the vestibule temperature drops near freezing and the spray system drains onto the roof.

Hot Water and Steam Coils

The RPE/RDE economizer offers better mixing capability than competitive rooftops but it cannot protect a hydronic coil from localized freezing. Optional air mixers are available to reduce air stratification and freezing concerns.

• Glycol is strongly recommended for hot water coils. It is the only reliable protection in the event of a power failure. Glycol's impact on coil and pump performance must be considered.

• An optional, non-averaging coil freezestat is offered on the downstream face of the heating coil. The outdoor dampers are shut, the fan is shut off, and the heating valve is fully opened, if freezing temperatures are experienced. The freezestat must be set somewhat above freezing temperatures to improve protection and may experience nuisance trips. It can not protect the coils during a power outage.

• Freeze protection strategies must not cause the cabinet temperature to exceed 150° F or motors and electrical equipment may be damaged.

The field installed supply and bleed off water lines can enter the unit through the floor, inside the curb perimeter. This may provide sufficient protection depending on the temperature inside the curb. Use freeze protection if there is any concern the temperature inside the curb may fall below freezing. If no curb is provided, or field water piping enters the side of the unit, then additional measures are required such as heat tape and proper pipe insulation.

• Hot water and steam coil piping can enter the floor of the unit in the heat section and requires similar consideration.

Condenser Water Connections

Supply and return condenser water piping, plus field connections for chemical water treatment, are shown in Figure 16 on page 22. Supply water can enter the floor of the service vestibule. Space is allowed in the vestibule for chemical tanks. Condenser bleed off (or return) connections allow easy drainage to a sanitary sewer through the floor of the vestibule.

The spray operation washes particles out of the condenser air and condenser heat rejection evaporates water. This process leaves behind minerals and particles that were contained in the water. Water bleed off and water treatment are required to prevent the build up of scale, sludge and microorganisms on the tube bundles and in the sump. These must be installed prior to unit start-up. See “Optional Water Treatment” on page 12.

22 Cat 219

Figure 16: Condenser Water Piping and Connections

Water Consumption

The theoretical water consumption required for proper heat rejection is 1.8 gallons per cooling ton hour. A nominal 100-ton unit, running at 50% capacity or 50 tons, evaporates 90 gallons of water per hour while rejecting condenser heat.

• Additional water must be added to the sump and bled off to the sanitary sewer to remove particles and minerals that accumulate in the water during operation. The required amount of bleed off varies with the water quality and is generally 0.6 to 0.9 gallons per ton hour or 33-50% of the theoretical evaporation water. Bleed off can be controlled in two ways.

• The RPE/RDE is provided with a manual shut off valve that can be used to adjust for a constant flow rate of bleed off water. This standard bleed off system can easily bleed off too much or too little water.

• Controlling bleed off with a solenoid valve, based on water conductivity or some other measure of particle concentration should be used. It is included in the RPE/RDE water treatment option.

• The RPE sump also has a float control that automatically opens the supply water solenoid and replaces water lost in evaporation and bleed off.

Water utility costs are usually based on the combination of water usage and sewer discharge. Only the bleed off portion of the water used by an evaporative condenser drains to the sewer (about 25-33% of total water used). Therefore, the sewer component of the cost of water may be reduced significantly if approved water meters are installed in the intake and bleed lines. The difference in meter rates reflects evaporation (water that will not go to the sewer) and this can be applied as a credit to the total water bill. Consult your local water utility for details.

Water Treatment

All evaporative condensers require proper water treatment. See “Optional Water Treatment” on page 12.

The purpose of the water treatment system is to:

• Control organic contamination.

• Reduce condenser and sump scaling, fouling and corrosion.

• Reduce the required cleaning frequency.

Proper water treatment involves 2 mandatory components (chemical treatment and bleed off) and may also require a solid separator system depending on water quality.

SprayPump

Optional FreezeProtection DrainValve

Manual DrainValve

OptionalWater TreatmentController

Supply toSump

Field Bleedoffor DrainConnection

From OptionalSeparator

To SpraySystem

To SpraySystem

Field SupplyWater Connection

ManualShut offValves

To OptionalSeparator andChemical Tanks

Hose Biband ManualShut offValve

RecommendedWater PipingEntranceThrough theCurb

AutomaticSupply Water Valve(Float Controlled)

RemovableSump Screen

FromSump

Sump Drain LeftOpen for Shipment

Cat 219 23

Selection InstructionsBuilding design and unit selection must allow for code compliance and installation limitations. The McQuay Rooftop unit offers excellent flexibility to meet diverse application requirements.

This catalog includes summary performance tables at several operating conditions. Performance at other conditions can be estimated by interpolation but accuracy may suffer. Extrapolation often results in unreliable or damaging operating conditions and should not be used without factory guidance that is available through your local sales representative. Contact your McQuay Representative for custom selections at specific design conditions.

Selection Example

Proper selection is illustrated based on the

following design criteria:

• 38,000 supply CFM at 2.00" ESP

• 36,000 return CFM at 0.75" ESP

• Sea level location using 60 Hertz power

• 95/ 75° F cooling ambient temperature

• 80/ 67° F cooling mixed air temperature [MAT]

Total cooling loads requirements:

• 115 total tons

• 87 sensible tons

Total sensible loads allow for:

• 50 HP SAF motor

• 25 HP RAF motor

Gas furnace requirements:

• 1520 MBH of design heating

• 9" gas pressure available at the unit

• Furnace to only be used at design CFM for morning warm up and night heat

• An RPE unit must be used since a furnace, or electric heat, or final filters are required.

Unit includes:

• Economizer plus return fan

• 65% filters plus pre-filters

Cooling Selection

Gross and Net Cooling

The tables within the section “Cooling Capacity Data” on page 26 provide gross cooling or DX coil capacity based on DX coil entering air temperature (EAT).

Net unit cooling capacity = [Gross cooling capacity] - [fan/ motor heat]

Fan/ motor heat is critical. Refer to “Indoor Fan and Motor Heat, Blow Through versus Draw Through Cooling” on page 17.

Fan/ motor heat = 2800 BTUH per BHP

Fan/ motor temperature rise (TR) = BTUH / (1.08 x CFM)

Mixed air vs. entering air temperature [MAT vs. EAT]

Draw through coil EAT = MAT

Blow through coil EAT = MAT + TR

Blow through EDB = mixed air EDB + TR

Use a psychometric chart to find blow through EWB.

Selection From Capacity Tables

Blow through vs. draw through. Refer to “Indoor Fan and Motor Heat, Blow Through versus Draw Through Cooling” on page 17.

Required sensible heat ratio < 80% [87 / 115 = 76%]

An RPE is required due to the gas heat requirement. Therefore a draw through RPE will be considered first.

The RPE unit is available with both a low and high airflow DX coil. Refer to Table 7 on page 25.

First select a high and low airflow coil with sufficient capacity.

The RPE 110 with high airflow coil has sufficient capacity.

No low airflow coil has sufficient capacity.

Check coil velocity on all possible selections.

High airflow face area = 76.0 square feet face velocity = 526 feet per minute.

Low airflow face area = 60.8 square feet face velocity = 658 feet per minute

The low airflow velocity is too much per “Unit Operating Range (CFM and Temperature)” on page 16.

The RPE 110 [with high airflow coil] is sufficient per Table 15 on page 29.

RPE 110 provides 117.6 total tons.

RPE 110 provides 90.8 tons of sensible capacity.

RPE 110 power consumption.

90.0 compressor kW (see Table 15 on page 29).

4.0 condenser fan and pump kW (see Table 20 on page 32).

RPE 110 fan and motor heat must still be verified to be less than 50 = 25 BHP [per “fan selection”] to be sure that net cooling capacity is sufficient.

Heat SelectionSee Catalog 214 or 217 for hot water, steam and electric heat selection instructions.

Furnace SelectionSee Table 23 and Table 24 on page 34 and Table 25 on page 35.

Table 23 and Table 24 indicate all of the furnace output capacities available.

Output capacity is the true measure of furnace capacity

24 Cat 219

Output capacity = Input capacity x furnace efficiency

Furnace efficiency = 80% for McQuay furnaces [similar to most direct fired furnaces]

Net unit heating capacity =

Furnace heating capacity + fan / motor heat =

Furnace heating capacity + (50 + 25) X 2800 =

Furnace heating capacity + 210,000 BTUH

Net heating capacity must satisfy the heating load of 1520 MBH. A 1400 MBH furnace is the correct choice.

1,400,000 BTUH + 210,000 BTUH exceeds the 1,520 MBH requirement.

Assuming actual BHP exceeds (1,520,000 - 1,400,000) / 2800 = 42.9 BHP

Baffle selection is based on design airflow and Table 23.

Baffle A has the greatest air pressure drop.

Use baffle A from 21,000 to 37,999 CFM.

Baffle B has the next greatest air pressure drop.

Use baffle B from 38,000 to 38,999 CFM.

Furnace air pressure drop at design air flow

Refer to Table 23 on page 34 for a 1400 MBH furnace with B baffle.

0.86" = furnace air pressure drop.

Minimum inlet gas pressure

Refer to Table 24 on page 34 for a 1400 MBH furnace.

Minimum inlet gas pressure = 8.8" for the standard modulating burner.

5.0" for the 20:1 high turndown, modulating burner.

Furnace air temperature rise = Output BTUH 1,400,000 / 1.08 x CFM = 32.4° F

Filter SelectionRefer to Table 7 on page 25 and Table 27 on page 37.

Table 7 shows the filter face area options.

Table 27 shows performance data for each filter option:

Clean filter air pressure drop

Maximum airflow

Selection for 65% filter at 38,000 CFM per Table 27.

The medium airflow option is required

Clean air pressure drop = 0.65"

30% prefilter clean air pressure drop = 0.36"

Maximum recommended, dirty filter pressure drop [PD] for these filters:

0.7" for the 30% prefilter

1.0" for the 65% filters

Please note that 95% filters are not part of this selection.

95% filter, maximum recommended, dirty PD = 1.20".

Average filter PD = (0.7 + 1.0 + 0.65 + 0.36) / 2 = 1.35"

McQuay generally recommends selecting the supply fan based on average filter PD.

This allows airflow to best match specifications.

Adjustments can be made to maintain critical, mini-mum airflow.

Fan SelectionRefer to the following:

Table 7 on page 25 and Table 27 on page 37.

“Fan Performance Data” beginning on page 38.

“Fan Operating Range” on page 16.

Return Air Fan and Exhaust Air Fan Selection

Refer to Figure 32 on page 43 for 36,000 CFM at 0.75" ESP.

The 44" SWSI return fan performance requires 19.5 BHP at 810 RPM.

19.5 BHP satisfies the RAF BHP specification

Supply Fan Selection

The unit is specified to have a return fan.

Therefore the supply fan must only handle internal APD and supply duct ESP.

See “Economizer, Return Fan and Exhaust Fan Application” on page 15.

Internal APD per Table 26 and Table 27 on page 37.

Economizer with return fan = 0.52"

High airflow, 12 fpi, DX coil air pressure drop = 0.80"

Gas furnace = 0.86"

Average filter air PD = 1.35"

TSP = 0.52 + 0.80 + 0.86 + 1.35 + 2.00 ESP = 5.54"

SWSI plenum vs. DWDI supply fan selection

Each type should be considered based on maximum efficiency and customer preference.

DWDI fans are available on RPE, blow through or draw through units and must be used due to the furnace requirement.

SWSI fans are only available on RDE, draw though units.

No blow through coils or filters.

No furnaces or electric heat.

They offer advantages with side discharge.

Pick the optimum SAF for 38,000 CFM and 5.54" TSP

40" DWDI = 47.8 BHP and 1085 RPM (see Figure 23 on page 33).

36" DWDI = 50.1 BHP and 1288 RPM (see Figure 24 on page 36).

33" DWDI = do not select.

The 40" fan is superior.

5% more efficient and, therefore, quieter

Saves a motor size.

Meets the 50 HP supply fan allowance.

We can now verify acceptable net heating and cooling capacities.

Actual supply and return fan BHP = 47.8 + 19.5 = 67.3

Acceptable for cooling (67.3 < 50 + 25)

Acceptable for heating (67.3 > 42.9)

Cat 219 25

Physical Data

Table 7: Physical Data, RPE/RDE 076C-150C

DataUnit Size

076C 089C 100C 110C 130C 140C 150C

Nominal Capacity (tons)a

a. Rated in accordance with ARI Standard 360

79.2 89.4 98.9 119.3 130.8 141.9 152.5

Nominal Airflow (cfm) 32000 35000 35000 42000 45000 46000 46000

Compressor

Type Reciprocating

Quantity - hp 2-30 2-35 2-40 4-25 4-30 2-30, 2-35 4-35

Std. capacity control 100-83-67-33-0 100-75-50-25-0 100-72-44-22-0 100-75-50-25-0

Opt. capacity control 100-83-67-50-33-16-0 100-88-75-63-50-38-25-12-0100-89-79-61-44-32-22-11-0

100-92-83-67-50-42-33-16-0

Condenser Fans No. - Dia. (In.) 4-26 4-26 4-26 6-26 6-26 6-26 6-26

Condenser Fan Motors

No. - Hp 4-1.5 4-1.5 4-1.5 6-1.5 6-1.5 6-1.5 6-1.5

Supply Fans

Type SWSI Airfoil

No. - Dia. (In.) 1-44, 49

Motor hp range 5 - 75

Type DWDI Airfoil

No. - Dia. (In.) 1-33, 36 1-33, 36 1-33, 36 1-36, 40 1-36, 40 1-36, 40 1-36, 40

Motor hp range 5-75 5-75 5-75 5-75 5-75 5-75 5-75

Return Fans

Type SWSI Airfoil

No. - Dia. (In.) 1-44.5 1-44.5 1-44.5 1-44.5 1-44.5 1-44.5 1-44.5

Motor hp range 5-60 5-60 5-60 5-60 5-60 5-60 5-60

Exhaust Fans

Type Propeller

Diameter (In.) 36 36 36 36 36 36 36

Quantity 2-3 per unit 2-3 per unit 2-3 per unit 2-3 per unit 2-3 per unit 2-3 per unit 2-3 per unit

Motor hp 5 each 5 each 5 each 5 each 5 each 5 each 5 each

Evaporator Coils

Rows 3, 4, 5 3, 4, 5 3, 4, 5 3, 4, 5 3, 4, 5 3, 4, 5 3, 4, 5

FPI 8, 10, 12 8, 10, 12 8, 10, 12 8, 10, 12 8, 10, 12 8, 10, 12 8, 10, 12

F.A., small (sq. ft.) 53.9 53.9 53.9 60.8 - - -

F.A., large (sq. ft.) 60.8 60.8 60.8 76.0 76.0 76.0 76.0

Hot Water Coils

Type - Rows 5WH-1 5WH-1 5WH-1 5WH-1 5WH-1 5WH-1 5WH-1

Type - Rows 5WS-2 5WS-2 5WS-2 5WS-2 5WS-2 5WS-2 5WS-2

FPI 9 9 9 9 9 9 9

Face area (sq. ft.) 42.2 42.2 42.2 42.2 42.2 42.2 42.2

Steam Coils

Type - Rows 5JA-1, 2 5JA-1, 2 5JA-1, 2 5JA-1, 2 5JA-1, 2 5JA-1, 2 5JA-1, 2

FPI 6, 12 6, 12 6, 12 6, 12 6, 12 6, 12 6, 12

Face area (sq. ft.) 42.2 42.2 42.2 42.2 42.2 42.2 42.2

Gas Furnaceb

b. Gas furnace size availability is limited by minimum airflow. See Table 23 on page 34.

Input (MBh) 625, 800, 812, 988, 1000, 1250, 1375, 1750, 1875, 2500

Nom. Output (MBh) 500, 640, 650, 790, 800, 1000, 1100, 1400, 1500, 2000

Electric Heatc

c. Electric heat availability is limited by minimum airflow, See through. See Table 22 on page 34.

Nom. Output (kW) 80, 100, 120, 160, 200, 240, 280, 320

Panel Filters

Type 30% Pleated

Area (sq. ft.) 116.1 116.1 116.1 116.1 116.1 116.1 116.1

No. - size (in.)11-16x20x233-16x25x2

11-16x20x233-16x25x2

11-16x20x233-16x25x2

11-16x20x233-16x25x2

11-16x20x233-16x25x2

11-16x20x233-16x25x2

11-16x20x233-16x25x2

Prefilters (for Cartridge Filters)

Type Prefilter, Standard Flow Prefilter, Medium Flow

Area (sq. ft.) 56.0 56.0 56.0 64.0 64.0 64.0 64.0

No. - size (in.)4-12x24x2

12-24x24x24-12x24x212-24x24x2

4-12x24x212-24x24x2

16-24x24x2 16-24x24x2 16-24x24x2 16-24x24x2

Type Prefilter, Medium Flow Prefilter, High Flow

Area (sq. ft.) 64.0 64.0 64.0 80.0 80.0 80.0 80.0

No. - size (in.) 16-24x24x2 16-24x24x2 16-24x24x28-12x24x216-24x24x2

8-12x24x216-24x24x2

8-12x24x216-24x24x2

8-12x24x216-24x24x2

Cartridge Filters

Type 65% or 95% Standard Flow 65% or 95% Medium Flow

Area (sq. ft.) 56.0 56.0 64.0 64.0 64.0 64.0

No. - size (in.)4-12x24x1212-24x24x12

4-12x24x1212-24x24x12

4-12x24x1212-24x24x12

16-24x24x12 16-24x24x12 16-24x24x12 16-24x24x12

Type 65% or 95% Medium Flow 65% or 95% High Flow

Area (sq. ft.) 40.0 64.0 64.0 80.0 80.0 80.0 80.0

No. - size (in.) 16-24x24x12 16-24x24x12 16-24x24x128-12x24x12

16-24x24x128-12x24x12

16-24x24x128-12x24x1216-24x24x12

8-12x24x1216-24x24x12

26 Cat 219

Cooling CaCooling Capacity Dapacity Data

Table 8: RPE/RDE 076C Low Airflow Coil

Table 9: RPE/RDE 076C High Airflow Coil

Unit DataEntering Air

Ambient Wet Bulb Temperature

70 75 80

DB WB TH SH KW TH SH KW TH SH KW

24000 cfm

5 row 12 fpi

75

63 855 642 49.4 844 637 51.1 832 632 52.8

67 917 531 50.5 906 526 52.2 893 521 53.9

71 986 419 51.6 973 415 53.3 961 410 55.1

80

63 857 773 49.5 846 769 51.1 834 764 52.8

67 918 663 50.6 905 658 52.2 893 653 54.0

71 984 551 51.6 972 547 53.3 959 542 55.1

85

63 879 879 49.9 870 870 51.5 861 861 53.3

67 919 795 50.6 908 791 52.3 896 786 54.0

71 982 683 51.6 970 678 53.4 957 674 55.1

28000 cfm

5 row 12 fpi

75

63 876 695 49.8 865 691 51.5 853 686 53.2

67 940 568 50.9 927 563 52.6 915 558 54.3

71 1007 438 51.9 995 434 53.7 — — —

80

63 883 847 50.0 871 842 51.6 859 836 53.3

67 938 720 50.9 926 716 52.6 914 711 54.4

71 1005 591 51.9 993 586 53.7 981 582 55.5

85

63 924 924 50.6 915 915 52.3 905 905 54.1

67 942 872 51.0 931 867 52.7 918 863 54.5

71 1004 744 52.0 991 739 53.7 — — —

32000 cfm

5 row 12 fpi

75

63 893 748 50.1 881 743 51.8 869 738 53.5

67 955 602 51.2 943 598 52.8 930 593 54.6

71 — — — — — — — — —

80

63 905 905 50.4 895 895 52.1 884 884 53.8

67 955 776 51.2 943 771 52.9 930 766 54.7

71 — — — — — — — — —

85

63 960 960 51.2 950 950 53.0 940 940 54.8

67 965 945 51.4 953 939 53.1 940 932 54.9

71 — — — — — — — — —



70 75 80


28000 cfm

5 row 12 fpi

75

63 884 700 50.0 873 695 51.6 861 690 53.3

67 947 571 51.0 935 566 52.7 923 562 54.4

71 — — — — — — — — —

80

63 888 852 50.1 879 848 51.7 866 842 53.5

67 946 724 51.1 934 720 52.7 921 715 54.5

71 — — — — — — — — —

85

63 932 932 50.7 922 922 52.5 912 912 54.2

67 952 878 51.1 938 873 52.8 926 868 54.6

71 — — — — — — — — —

32000 cfm

5 row 12 fpi

75

63 899 752 50.3 887 747 51.9 875 742 53.6

67 964 607 51.3 951 602 53.0 938 597 54.7

71 — — — — — — — — —

80

63 912 912 50.5 903 903 52.2 892 892 54.0

67 963 781 51.3 951 776 53.0 937 771 54.8

71 — — — — — — — — —

85

63 969 969 51.4 959 959 53.1 948 948 54.9

67 973 952 51.5 961 946 53.2 947 939 55.0

71 — — — — — — — — —

36000 cfm

5 row 12 fpi

75

63 913 803 50.5 901 798 52.2 889 793 53.9

67 975 641 51.5 963 636 53.2 950 631 55.0

71 — — — — — — — — —

80

63 944 944 50.9 933 933 52.7 923 923 54.4

67 977 836 51.6 965 831 53.3 951 826 55.0

71 — — — — — — — — —

85

63 1001 1001 51.9 990 990 53.6 979 979 55.4

67 998 998 51.9 988 988 53.7 977 977 55.5

71 — — — — — — — — —

DO NOT SELECT NOMINAL CAPACITY

Cat 219 27





70 75 80


27000 cfm

5 row 12 fpi

75

63 962 721 62.9 951 716 64.5 939 711 66.0

67 1035 598 64.6 1023 593 66.2 1011 588 67.8

71 1113 473 66.5 1101 469 68.0 1089 464 69.6

80

63 966 870 63.0 955 865 64.5 944 860 66.1

67 1035 746 64.7 1024 742 66.2 1011 737 67.8

71 1111 621 66.5 1099 616 68.0 1086 612 69.6

85

63 990 990 63.5 980 980 65.1 971 971 66.8

67 1035 893 64.7 1024 889 66.3 1012 884 67.8

71 1111 769 66.5 1098 764 68.1 1085 760 69.7

31000 cfm

5 row 12 fpi

75

63 985 775 63.5 973 770 65.0 961 765 66.5

67 1057 634 65.2 1045 629 66.7 1032 624 68.3

71 1136 492 67.0 1124 488 68.6 1111 483 70.2

80

63 991 942 63.6 979 937 65.2 968 931 66.7

67 1058 804 65.2 1046 799 66.8 1034 794 68.3

71 1135 661 67.0 1123 657 68.6 1109 652 70.2

85

63 1035 1035 64.6 1025 1025 66.2 1016 1016 67.8

67 1060 971 65.3 1049 966 66.9 1036 961 68.4

71 1133 830 67.1 1120 825 68.6 1107 821 70.2

35000 cfm

5 row 10 fpi

75

63 992 816 63.6 980 811 65.2 968 806 66.7

67 1065 662 65.3 1053 657 66.8 1040 652 68.4

71 1142 504 67.2 1130 500 68.7 1116 495 70.3

80

63 1001 991 63.9 990 984 65.4 979 976 67.0

67 1063 848 65.4 1051 843 66.9 1038 838 68.5

71 1140 691 67.2 1128 687 68.7 1114 682 70.3

85

63 1060 1060 65.2 1050 1050 66.8 1040 1040 68.4

67 1072 1028 65.6 1059 1022 67.1 1046 1016 68.7

71 1139 877 67.2 1126 873 68.8 1113 868 70.4



70 75 80


31000 cfm

5 row 12 fpi

75

63 995 781 63.7 983 776 65.2 971 771 66.8

67 1068 639 65.4 1056 634 67.0 1043 629 68.5

71 1148 497 67.3 1135 492 68.9 1122 487 70.5

80

63 1001 950 63.9 990 945 65.4 978 939 67.0

67 1067 809 65.5 1055 804 67.0 1043 799 68.6

71 1146 666 67.3 1134 662 68.9 1120 657 70.5

85

63 1045 1045 64.8 1035 1035 66.4 1025 1025 68.1

67 1070 977 65.6 1059 973 67.1 1046 968 68.7

71 1144 835 67.4 1132 831 68.9 1118 826 70.5

35000 cfm

5 row 12 fpi

75

63 1013 833 64.2 1001 828 65.7 989 823 67.2

67 1087 675 65.8 1075 670 67.4 1061 665 69.0

71 — — — — — — — — —

80

63 1022 1015 64.4 1012 1009 66.0 1001 1001 67.6

67 1086 865 65.9 1073 860 67.5 1060 855 69.0

71 — — — — — — — — —

85

63 1085 1085 65.8 1074 1074 67.4 1063 1063 69.0

67 1093 1052 66.2 1082 1047 67.7 1070 1042 69.3

71 — — — — — — — — —

39000 cfm

5 row 10 fpi

75

63 1018 873 64.3 1006 868 65.8 994 863 67.3

67 1090 701 65.9 1078 697 67.5 1064 692 69.1

71 — — — — — — — — —

80

63 1041 1041 64.7 1031 1031 66.3 1020 1020 67.9

67 1090 908 66.0 1078 903 67.6 1065 898 69.1

71 — — — — — — — — —

85

63 1103 1103 66.3 1093 1093 67.9 1082 1082 69.5

67 1102 1098 66.4 1093 1091 68.0 1081 1081 69.6

71 — — — — — — — — —


28 Cat 219



Unit Data

Entering AirAmbient Wet Bulb Temperature

70 75 80


29000 cfm

5 row 12 fpi

75

63 1072 791 77.1 1060 786 78.9 1046 780 80.8

67 1154 659 79.6 1140 653 81.5 1125 647 83.4

71 1240 525 82.3 1226 519 84.2 1211 514 86.3

80

63 1078 951 77.1 1064 945 78.9 1049 938 80.9

67 1153 817 79.6 1141 812 81.4 1125 806 83.4

71 1238 683 82.3 1223 677 84.2 1208 672 86.3

85

63 1094 1094 77.6 1083 1083 79.5 1072 1072 81.6

67 1153 976 79.7 1140 970 81.6 1125 964 83.6

71 1237 842 82.4 1223 836 84.3 1208 831 86.3

32000 cfm

5 row 12 fpi

75

63 1092 832 77.6 1079 826 79.4 1065 820 81.4

67 1172 686 80.2 1158 680 82.1 1143 674 84.1

71 1258 538 83.0 1244 533 84.9 1228 527 86.9

80

63 1095 1005 77.7 1081 998 79.6 1068 993 81.5

67 1171 860 80.2 1156 854 82.1 1142 849 84.1

71 1257 713 82.9 1242 707 84.9 1227 702 86.9

85

63 1129 1129 78.8 1118 1118 80.7 1106 1106 82.8

67 1173 1034 80.3 1159 1028 82.2 1144 1022 84.2

71 1257 888 83.0 1243 882 84.9 1227 877 86.9

35000 cfm

5 row 10 fpi

75

63 1096 860 77.7 1082 854 79.5 1067 848 81.5

67 1175 704 80.3 1160 698 82.2 1145 692 84.2

71 1262 546 83.0 1247 541 85.0 1232 535 87.0

80

63 1099 1042 77.9 1087 1036 79.7 1073 1029 81.7

67 1175 891 80.3 1160 885 82.2 1145 879 84.2

71 1259 733 83.0 1245 728 84.9 1229 722 87.0

85

63 1146 1146 79.3 1135 1135 81.3 1123 1123 83.3

67 1177 1074 80.5 1163 1068 82.4 1148 1062 84.4

71 1261 921 83.1 1246 916 85.0 1228 909 87.0



70 75 80


31000 cfm

5 row 12 fpi

75

63 1099 826 77.8 1086 820 79.6 1071 813 81.6

67 1180 683 80.4 1166 677 82.3 1150 671 84.3

71 1269 540 83.2 1254 535 85.2 1238 529 87.2

80

63 1102 995 77.9 1089 989 79.8 1075 983 81.7

67 1179 853 80.5 1165 847 82.4 1150 841 84.4

71 1266 709 83.2 1251 704 85.2 1235 698 87.2

85

63 1129 1129 78.8 1118 1118 80.7 1107 1107 82.8

67 1180 1022 80.6 1166 1016 82.5 1151 1010 84.5

71 1267 880 83.3 1252 874 85.2 1234 868 87.2

35000 cfm

5 row 12 fpi

75

63 1120 878 78.5 1105 872 80.4 1090 866 82.3

67 1202 719 81.2 1187 713 83.0 1171 707 85.0

71 1292 559 84.0 1277 554 85.9 1261 548 87.9

80

63 1126 1068 78.7 1113 1061 80.6 1098 1054 82.6

67 1202 910 81.2 1187 904 83.1 1172 899 85.1

71 1289 749 84.0 1274 744 85.9 1258 738 87.9

85

63 1175 1175 80.2 1163 1163 82.2 1151 1151 84.3

67 1205 1099 81.4 1190 1093 83.3 1175 1087 85.3

71 1288 940 84.1 1273 935 86.0 1257 929 88.0

39000 cfm

5 row 10 fpi

75

63 1127 919 78.7 1112 913 80.6 1097 907 82.5

67 1207 745 81.3 1192 740 83.2 1177 734 85.2

71 1297 570 84.2 1282 565 86.1 1266 560 88.1

80

63 1136 1116 79.1 1122 1109 80.9 1108 1100 82.9

67 1208 954 81.4 1194 948 83.3 1178 942 85.3

71 1296 779 84.1 1281 774 86.0 1264 768 88.1

85

63 1198 1198 81.0 1186 1186 83.0 1174 1174 85.1

67 1213 1155 81.7 1201 1150 83.5 1185 1142 85.6

71 1293 987 84.2 1278 981 86.1 1262 976 88.1


Cat 219 29





70 75 80


33000 cfm

5 row 12 fpi

75

63 1257 916 82.9 1240 909 85.0 1221 900 87.2

67 1357 768 85.3 1340 760 87.5 1321 753 89.8

71 1463 616 88.0 1445 609 90.2 1426 602 92.5

80

63 1258 1096 82.9 1242 1089 85.0 1224 1081 87.2

67 1359 949 85.3 1341 942 87.5 1321 934 89.8

71 1461 796 88.0 1442 789 90.2 1423 782 92.5

85

63 1272 1269 83.3 1258 1258 85.5 1243 1243 87.8

67 1359 1129 85.4 1341 1122 87.6 1321 1114 89.9

71 1459 977 88.0 1441 970 90.2 1422 963 92.6

36000 cfm

5 row 12 fpi

75

63 1277 957 83.4 1260 950 85.5 1242 942 87.8

67 1379 795 85.9 1361 788 88.0 1342 781 90.3

71 1483 630 88.5 1465 623 90.8 1445 616 93.1

80

63 1280 1153 83.5 1265 1146 85.6 1246 1137 87.8

67 1379 992 85.9 1360 984 88.1 1339 976 90.4

71 1482 827 88.5 1463 820 90.7 1444 812 93.0

85

63 1312 1312 84.2 1299 1299 86.4 1284 1284 88.8

67 1379 1187 86.0 1361 1180 88.2 1342 1172 90.4

71 1481 1023 88.6 1463 1016 90.8 1442 1009 93.1

39000 cfm

5 row 10 fpi

75

63 1280 985 83.5 1263 977 85.6 1245 969 87.8

67 1381 812 85.9 1363 805 88.1 1344 798 90.4

71 1486 637 88.6 1468 631 90.8 1448 623 93.1

80

63 1286 1191 83.5 1269 1183 85.7 1250 1174 87.9

67 1379 1021 86.0 1362 1014 88.1 1343 1007 90.4

71 1483 845 88.5 1465 839 90.8 1445 832 93.1

85

63 1330 1330 84.6 1316 1316 86.8 1302 1302 89.2

67 1381 1227 86.1 1364 1220 88.2 1345 1212 90.5

71 1483 1055 88.7 1465 1048 90.8 1445 1041 93.2



70 75 80


38000 cfm

5 row 12 fpi

75

63 1326 1003 84.6 1309 995 86.7 1289 987 89.0

67 1429 830 87.2 1410 823 89.3 1390 815 91.6

71 1537 655 89.9 1518 648 92.1 1497 641 94.4

80

63 1332 1212 84.7 1315 1204 86.9 1293 1194 89.2

67 1429 1039 87.2 1411 1032 89.4 1392 1024 91.7

71 1536 864 89.8 1516 857 92.1 1495 849 94.4

85

63 1372 1372 85.6 1356 1356 87.9 1340 1340 90.3

67 1429 1246 87.3 1411 1239 89.5 1391 1231 91.8

71 1532 1071 89.9 1513 1064 92.2 1492 1057 94.5

42000 cfm

5 row 12 fpi

75

63 1349 1057 85.2 1331 1049 87.3 1311 1041 89.6

67 1451 867 87.7 1432 859 89.9 1412 852 92.2

71 1559 674 90.4 1540 667 92.7 1519 659 95.0

80

63 1358 1285 85.4 1340 1277 87.5 1321 1268 89.8

67 1453 1097 87.8 1431 1089 90.0 1411 1081 92.3

71 1557 903 90.4 1537 896 92.6 1516 889 95.0

85

63 1417 1417 86.8 1402 1402 89.1 1386 1386 91.5

67 1455 1324 87.9 1436 1316 90.1 1416 1308 92.5

71 1554 1132 90.5 1535 1125 92.7 1514 1117 95.1

46000 cfm

5 row 10 fpi

75

63 1354 1096 85.3 1335 1089 87.4 1316 1080 89.7

67 1456 892 87.8 1437 885 90.0 1416 877 92.3

71 1562 684 90.5 1542 678 92.7 1521 670 95.1

80

63 1365 1333 85.6 1347 1323 87.8 1328 1313 90.1

67 1454 1138 87.9 1435 1131 90.1 1414 1123 92.4

71 1559 931 90.5 1539 924 92.7 1518 917 95.1

85

63 1439 1439 87.4 1424 1424 89.7 1408 1408 92.1

67 1462 1379 88.1 1443 1370 90.3 1424 1362 92.7

71 1557 1177 90.6 1537 1170 92.8 1516 1163 95.1


30 Cat 219



Unit Data Entering AirAmbient Wet Bulb Temperature

70 75 80


41000 cfm

5 row 12 fpi

75

63 1460 1094 101.4 1445 1087 103.6 1427 1080 106.0

67 1566 905 104.4 1549 898 106.8 1531 891 109.2

71 1677 714 107.6 1660 707 110.0 1641 701 112.5

80

63 1463 1317 101.5 1446 1310 103.8 1432 1303 106.2

67 1563 1128 104.4 1548 1122 106.8 1530 1115 109.2

71 1675 938 107.6 1658 931 110.0 1640 925 112.5

85

63 1500 1500 102.4 1485 1485 104.9 1471 1471 107.4

67 1566 1353 104.6 1550 1346 106.9 1532 1339 109.4

71 1675 1163 107.7 1658 1156 110.1 1640 1150 112.5

45000 cfm

5 row 12 fpi

75

63 1483 1147 102.0 1466 1140 104.3 1448 1132 106.7

67 1588 941 105.1 1571 934 107.4 1552 927 109.9

71 1700 732 108.3 1682 726 110.7 1663 719 113.1

80

63 1489 1390 102.2 1472 1383 104.5 1455 1375 107.0

67 1587 1186 105.1 1570 1179 107.5 1552 1172 109.9

71 1698 977 108.2 1680 971 110.6 1661 964 113.1

85

63 1544 1544 103.7 1530 1530 106.2 1515 1515 108.7

67 1590 1429 105.3 1574 1422 107.7 1556 1415 110.1

71 1699 1223 108.3 1682 1217 110.7 1663 1210 113.2

49000 cfm

5 row 10 fpi

75

63 1484 1184 102.1 1467 1176 104.4 1449 1169 106.8

67 1590 964 105.1 1572 957 107.5 1554 950 109.9

71 1704 742 108.3 1686 736 110.7 1667 730 113.2

80

63 1494 1437 102.4 1478 1429 104.7 1461 1420 107.1

67 1590 1226 105.2 1573 1220 107.6 1554 1212 110.0

71 1700 1004 108.3 1682 998 110.7 1663 991 113.1

85

63 1563 1563 104.3 1550 1550 106.8 1535 1535 109.3

67 1595 1482 105.4 1578 1474 107.8 1560 1467 110.2

71 1698 1266 108.4 1681 1259 110.8 1662 1253 113.2



70 75 80


43000 cfm

5 row 12 fpi

75

63 1602 1177 115.9 1585 1170 118.2 1567 1162 120.7

67 1721 980 119.3 1703 973 121.7 1685 966 124.1

71 1846 780 122.9 1828 774 125.4 1809 767 127.9

80

63 1607 1413 115.9 1590 1406 118.3 1572 1397 120.7

67 1720 1215 119.3 1703 1208 121.7 1684 1201 124.2

71 1845 1015 122.9 1827 1009 125.3 1807 1001 127.8

85

63 1626 1626 116.6 1611 1611 119.1 1599 1599 121.6

67 1722 1450 119.4 1705 1443 121.8 1687 1436 124.3

71 1843 1250 122.9 1823 1243 125.4 1806 1236 127.9

46000 cfm

5 row 10 fpi

75

63 1603 1203 115.9 1586 1196 118.3 1566 1187 120.8

67 1721 996 119.3 1703 989 121.7 1684 981 124.2

71 1848 786 122.9 1829 780 125.3 1810 773 127.8

80

63 1609 1449 115.9 1592 1441 118.3 1574 1433 120.8

67 1720 1243 119.3 1703 1236 121.7 1684 1229 124.2

71 1844 1033 122.9 1826 1026 125.3 1806 1019 127.8

85

63 1640 1640 117.1 1630 1630 119.4 1615 1615 122.0

67 1723 1489 119.4 1706 1482 121.8 1687 1474 124.3

71 1843 1280 122.9 1825 1274 125.4 1806 1267 127.9

49000 cfm

5 row 10 fpi

75

63 1617 1240 116.4 1601 1233 118.8 1583 1226 121.2

67 1738 1022 119.8 1720 1015 122.1 1701 1007 124.6

71 1863 799 123.4 1847 793 125.8 1825 785 128.4

80

63 1625 1500 116.5 1608 1492 118.9 1590 1484 121.4

67 1737 1284 119.8 1719 1277 122.2 1703 1271 124.6

71 1861 1061 123.4 1843 1055 125.8 1823 1048 128.3

85

63 1676 1676 117.9 1663 1663 120.4 1646 1646 123.0

67 1742 1544 119.9 1724 1537 122.3 1705 1529 124.8

71 1861 1324 123.5 1842 1317 125.9 1823 1310 128.4


Cat 219 31


Table 19: RPE/RDE Condenser Fan and Spray Pump Power Consumption

1.5 HP Spray Pump on all units0.8 kW per condenser fan motor



70 75 80


43000 cfm

5 row 12 fpi

75

63 1715 1228 130.1 1699 1220 132.5 1681 1212 135.0

67 1848 1032 133.7 1830 1025 136.1 1812 1017 138.6

71 1986 833 137.8 1968 826 140.2 1948 818 142.7

80

63 1717 1463 130.1 1701 1456 132.5 1683 1448 135.0

67 1846 1267 133.7 1829 1260 136.1 1810 1252 138.7

71 1983 1067 137.7 1964 1060 140.2 1945 1053 142.7

85

63 1729 1694 130.4 1713 1686 132.8 1693 1675 135.4

67 1843 1500 133.8 1828 1494 136.2 1809 1486 138.7

71 1980 1301 137.7 1961 1294 140.1 1941 1287 142.6

46000 cfm

5 row 10 fpi

75

63 1716 1253 130.1 1701 1246 132.5 1682 1238 134.9

67 1849 1047 133.8 1831 1040 136.2 1813 1032 138.7

71 1986 837 137.8 1967 830 140.2 1948 823 142.7

80

63 1721 1500 130.1 1704 1493 132.5 1687 1485 135.0

67 1847 1294 133.7 1830 1287 136.1 1811 1280 138.6

71 1983 1084 137.7 1964 1077 140.2 1944 1070 142.7

85

63 1735 1729 130.7 1721 1719 133.1 1706 1706 135.7

67 1847 1541 133.8 1829 1533 136.2 1811 1526 138.7

71 1980 1331 137.7 1961 1324 140.1 1941 1316 142.6

49000 cfm

5 row 10 fpi

75

63 1737 1292 130.7 1720 1285 133.1 1702 1277 135.6

67 1870 1074 134.3 1849 1066 136.8 1830 1058 139.3

71 2007 851 138.4 1988 844 140.8 1968 837 143.3

80

63 1741 1553 130.7 1724 1545 133.1 1706 1537 135.6

67 1867 1336 134.3 1849 1329 136.8 1830 1321 139.3

71 2004 1113 138.4 1985 1106 140.8 1965 1099 143.3

85

63 1770 1770 131.7 1755 1755 134.2 1741 1741 136.8

67 1868 1597 134.4 1850 1589 136.9 1831 1581 139.4

71 2001 1375 138.4 1985 1369 140.7 1964 1362 143.3


Unit Size Number of Condenser Fans Spray Pump & Condenser Fan Total kW

RPE 076C-100C 4 4.6

RPE 110C-150C 6 6.2

32 Cat 219

Heating Capacity Data

Figure 17: Steam Coil, Low Capacity

Figure 18: Steam Coil, Medium Capacity

Figure 19: Steam Coil, High Capacity

Table 20: Saturated Steam Properties

Table 21: Steam Valve Selection Chart

Pressure (psig) Temperature (°F) Latent Heat (Btu/lb.)

2 218.5 966.1

5 227.1 960.6

10 239.4 952.6

15 249.7 945.7

25 266.8 934.0

Valve Size

(inches)

Condensate Rate, lb./hr.

Steam Supply Pressurea

a. Based on valve pressure drop of 80% of saturated

steam supply pressure.

5 psig 10 psig 15 psig 25 psig

1 196- 260 301- 380 391- 480 571- 650

1-1/4 261- 380 381- 560 481- 700 651- 940

1-1/2 381- 600 561- 870 701-1090 940-1470

2 601- 950 871-1390 1091-1750 1471-2350

2-1/2 951-1330 1391-1940 1751-2450 2351-3290

3 1331-2020 1941-2950 2451-3716 -

Cat 219 33

Figure 20: Hot Water Valve Pressure Drop RPE/RDE 076C-150C

Figure 21: Hot Water Valve Piping Pressure Drop RPE/RDE 076C-150C

34 Cat 219

Table 22: Electric Heat Options

Electric Heat Minimum CFM must satisfy two issues:

1. Maximum temperature rise is 60°F, therefore (minimum cfm = (MBH) (1000) / (1.085) (60)

2. Airflow must not be less than 22,000 cfm regardless of temperature rise.

Table 23: Gas Furnace Design Maximum Air Temperature Rise (°F) and Minimum Air Flow

Table 24: Gas Burner Connection Size (inches) and gas inlet pressure (inches w.c.)

Model 80 100 120 160 200 240 280 320

208 Volt MBH 204 255 306 408 510 612 714 816

230-460, 575 Volt MBH 249 312 374 499 624 748 873 998

380 Volt MBH

Baffle

Position

Maximum Temperature Rise (°F)

Minimum Airflow (cfm)

*Column Number for Pressure Drop (See Table 25 on page 35)

Furnace Size (MBh) 500 640 650 790 800 1000 1100 1400 1500 2000

A

Maximum Temperature Rise 100 61 100 61 100 61 100 61 100 61

Minimum CFM 4600 9600 5970 12000 7340 15000 10100 21000 13700 30000

Column Number* 2 2 3 3 3 3 4 4 7 7

B


Minimum CFM 7400 14000 8200 14000 9800 18500 14000 38000 17000 38000

Column Number* 5 5 4 4 4 4 6 6 8 8

C


Minimum CFM 8400 16000 9200 16000 10400 23000 16000 39000 19000 46000

Column Number* 10 10 10 10 10 10 10 10 10 10

DescriptionFurnace Size (MBh Output)

500 640 650 790 800 1000 1100 1400 1500 2000

Natural Gas (CFH) 625 800 812 1000 1000 1250 1375 1750 1875 2500

Minimum Gas Inlet

Pressure

(In. W.C.)

Standard Burner 7.00 7.00 7.00 7.50 7.50 9.00 7.00 8.00 8.00 9.00

20:1 Burner 5.50 7.00 7.00 6.50 6.50 6.50 5.00 5.00 5.00 6.00

Gas Pipe

Connection Size

Inches (N.P.T.)

Through .5 psi 1.00 1.25 1.25 1.25 1.25 1.25 1.50 1.50 1.50 2.00

2-3 psi 1.00 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.50

5-10 psi 1.00 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25

Cat 219 35

Table 25: Furnace Pressure Drop (in. W.C.)

Airflow (cfm)Column Number (See Table 23 on page 34)

2 3 4 5 6 7 8 9 10

4000 0.05 - - - - - - - -

6000 0.1 - - - - - - - -

8000 0.17 0.14 0.08 0.07 - - - - -

10000 0.27 0.22 0.12 0.11 0.09 0.08 - - -

12000 0.39 0.32 0.17 0.16 0.13 0.12 0.09 0.08 -

14000 0.54 0.44 0.24 0.21 0.18 0.16 0.12 0.1 0.1

16000 0.7 0.57 0.31 0.28 0.24 0.2 0.15 0.13 0.12

18000 0.89 0.72 0.39 0.35 0.3 0.26 0.19 0.17 0.16

20000 1.09 0.89 0.48 0.43 0.37 0.32 0.24 0.21 0.2

22000 - 1.08 0.58 0.52 0.44 0.39 0.29 0.25 0.24

24000 - - 0.69 0.62 0.53 0.46 0.34 0.3 0.28

26000 - - 0.81 0.73 0.62 0.54 0.4 0.35 0.33

28000 - - 0.94 0.85 0.72 0.63 0.47 0.41 0.38

30000 - - 1.08 0.97 0.83 0.72 0.54 0.47 0.44

32000 - - 1.23 1.11 0.94 0.82 0.61 0.53 0.5

34000 - - - 1.25 1.06 0.92 0.69 0.6 0.56

36000 - - - - 1.19 1.04 0.77 0.68 0.63

38000 - - - - - 1.15 0.86 0.75 0.7

40000 - - - - - - 0.95 0.84 0.78

42000 - - - - - - 1.05 0.92 0.86

44000 - - - - - - 1.15 1.01 0.94

46000 - - - - - - - 1.11 1.03

48000 - - - - - - - 1.2 1.12

50000 - - - - - - - - 1.22

36 Cat 219

Gas Piping Schematic

Figure 22: Gas Piping Schematic

Table 26: Gravity Relief Damper Air Pressure Drop - 0-100% Economizer

Note: If all exhaust must occur through the economizer gravity relief damper, and no return or exhaust fan is provided, then the building may be pressurized by the sum of the return duct pressure drop plus the gravity relief pressure.

Item Description

ETL/UL ETL-C IRI/FIA FM

200-400

Mbh

500-2000

Mbh

200-400

Mbh

500-2000

Mbh

400-1000

Mbh

1100-2000

Mbh

500-2000

Mbh

1-8

(1) Forced Draft Blower (2) Combination Air

Switch (3) Pilot Cock (4) Pilot Pressure

Regulator (5) Pilot Gas Valve (6) Pilot

Orifice (7) Main Gas Orifice (8) Manifold

Pressure Tap

S S S S S S S

9 High Pressure Switch - - - - - S -

10 Test Cock B B B B L L B

11 Leak Test Tap Cock - - - - S S -

12 Shutoff Valve C S C - - H -

13 Vent To Atmosphere Valve, N/O - - - - - S -

14 Shutoff Valve C S C H HP H HP

15 Low Pressure Switch - - - - - S -

16 Main Pressure Regulator C S C S S S S

17 Main Gas Shutoff Cock B B B L L L B

18-22

(18) High Pressure Regulator (19)

Lubricated Shutoff Cock (20) Combustion

Air Butterfly Valve (21) Main Gas Butterfly

Valve (22) Modulating Operator

O O O O O O O

Exhaust CFM 20000 25000 30000 35000 40000

Size 076C-150C .25 .35 .48 .66 .85

Cat 219 37

Component Pressure Drops

Table 27: Component Pressure Drops

Table 28: Cooling Coil Air Pressure Drop

Note: DX coil pressure drops are based on wet coils.

Note: Pressure drop of cooling coils not shown can be found in the McQuay selection program output.

ComponentAirflow (cfm)

26,000 30,000 34,000 38,000 42,000 46,000 50,000

Outdoor/ Return

Air Optionsa b

0-30% outside air hood w/damper 0.11 0.14 0.18 0.23 0.28 0.34 0.40

100% outside air hood w/damper 0.03 0.03 0.04 0.06 0.07 0.08 0.09

Economizer, w/o RAF 0.15 0.20 0.26 0.32 0.39 0.46 0.54

Economizer, w/RAF 0.29 0.36 0.44 0.52 0.61 0.70 0.80

Filter Options

30% pleated 0.11 0.13 0.15 0.18 0.21 0.24 0.27

Prefilter, standard flow 0.24 0.31 0.37 - - - -

Prefilter, medium flow 0.21 0.25 0.31 0.36 - - -

Prefilter, high flow 0.15 0.18 0.22 0.26 0.30 0.34 0.39

65% cartridge, standard flow 0.43 0.55 0.68 - - - -

65% cartridge, medium flow 0.35 0.44 0.54 0.65 - - -

65% cartridge, high flow 0.24 0.31 0.38 0.45 0.53 0.62 0.71

95% cartridge, standard flow 0.57 0.71 0.85 - - - -

95% cartridge, medium flow 0.47 0.58 0.70 0.83 - - -

95% cartridge, high flow 0.34 0.42 0.50 0.59 0.69 0.79 0.89

Plenum OptionsReturn, isolation damper 0.03 0.03 0.03 0.03 0.03 0.03 0.03

Discharge, isolation damper 0.03 0.03 0.03 0.03 0.03 0.03 0.03

Cooling OptionscCooling diffuser 0.07 0.10 0.13 0.16 0.19 0.23 0.28

Cooling coils See Cooling Air Pressure Drop Table Below

Heating Options

Hot water, 1-row 0.19 0.24 0.30 0.36 0.43 0.50 0.58

Hot water, 2-row 0.38 0.48 0.60 0.72 0.86 1.00 1.16

Steam, 1-row, 6 fpi 0.15 0.19 0.24 0.29 0.34 0.40 0.46

Steam, 1-row, 12 fpi 0.25 0.31 0.37 0.45 0.52 0.60 0.69

Steam, 2-row, 6 fpi 0.30 0.39 0.48 0.58 0.68 0.80 0.92

Electric heat 0.14 0.19 0.24 0.30 0.37 0.45 0.53

Gas heat See Table 25 on page 35

a. Pressure drop through hood and damper is based on 30% of listed airflow.b. Pressure drop through the economizer assumes that the majority of air will be passing through the return air dampers. If large quantities of outside air are required, pressure

drops will increase causing airflow to decrease.c. A diffuser is provided on units with blow-through cooling coils, final filters or hydronic heating.

Unit

SizeCooling Coil

Airflow (cfm)

28000 30000 32000 34000 36000 38000 40000 42000 44000 46000 48000 50000

076C-

100C

DX, low airflow, 5-row, 10fpi 0.72 0.78 0.87 0.95 - - - - - - - -

DX, low airflow, 5-row, 12fpi 0.85 0.92 1.02 - - - - - - - - -

DX, high airflow, 5-row,

10fpi0.60 0.65 0.72 0.79 0.86 0.93 - - - - - -


12fpi0.71 0.77 0.85 0.93 1.01 - - - - - - -

110C-

150C

DX, low airflow, 5-row, 10fpi 0.60 0.67 0.74 0.81 0.88 0.95 - - - - - -

DX, low airflow, 5-row, 12fpi 0.72 0.80 0.87 0.95 1.04 - - - - - - -


10fpi0.43 0.48 0.53 0.58 0.63 0.68 0.73 0.78 0.84 0.89 0.95 1.01


12fpi0.52 0.57 0.62 0.68 0.74 0.80 0.86 0.92 0.98 1.05 - -

38 Cat 219

Fan Performance Data

DWDI Supply Fans

Figure 23: RPE076C-100C 33in. Airfoil Supply Fan

Figure 24: RPE076C-150C 36 in. Airfoil Supply Fan

Note: Maximum allowable static pressure at fan bulkhead is 5.0 in (i.e., ESP plus blow-through component pressure drops cannot exceed 5.0 in).

Cat 219 39

Figure 25: RPE 110C-150C 40” Airfoil Supply Fan


SWSI Plenum Supply FansFigure 26: RDE076C-150C 44 in. SWSI Airfoil Supply Fan


Airflow - cfm

0 4000 8000 12000 16000 20000 24000 28000 32000 36000 40000 44000 48000 52000

Sta

tic P

ress

ure

- in

. w.g

.

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

500

600

700

800

900

1000

1100

1200 RP

M60.0 BH

P50.0

7.5

10.0

15.0

20.025.0

30.0

40.0

40 Cat 219

Figure 27: RDE076C-150C 49 in. SWSI Airfoil Supply Fan


Return Fans & Exhaust Fans

Figure 28: All sizes (2) 36in. Propeller Exhaust Fans

.

Sta

tic P

ress

ure

- in

. w

.g.

Airflow -cfm

0 4000 8000 12000 16000 20000 24000 28000 32000 36000 40000

Ex

tern

al

Sta

tic

Pre

ss

ure

-in

.w

.g.

0.00

0.25

0.50

0.75

1.00

400

500

600

700800

900

1000 1100

1200

1250R

PM

10.08 .0

6.04.02.0

12.0

BH

P

Cat 219 41

Figure 29: All sizes (3) 36 in. Propeller Exhaust Fans

Figure 30: All sizes Standard 44 in. Airfoil Return

Airflow -cfm

0 6000 12000 18000 24000 30000 36000 42000 48000 54000 60000

Ex

tern

al

Sta

tic

Pre

ss

ure

-in

.w

.g.

0.00

0.25

0.50

0.75

1.00

400

500

600

700

800900

10001100

12001250

RPM

15.012

.0

9.06.03.0

18.0

BH

P

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42 Cat 219

Dimensional Data

Section Options and LocationsFigures show section options, curb lengths, and relative positions. Curb lengths (in inches) are shown below each icon.

Figure 31: RDE 076C-150C

Exhaust/ReturnAir

OA/Hood

Plenum

72

30% OA

72

Economizer

96

Econ/RAF

96

Filter

Angular

24

Cartridge56 ft

2

076C-100COnly

OptionalBlank

Blank

DX Coil

076C-100C

53.9 ft2

24

60.8 ft2

48

110C-130C

60.8 ft2

48

76 ft2

72

140C-150C

76 ft2

72

OptionalHeat

S&HW

48

Blank

48

Supply AirFan

44 in. Dia

72

49 in. Dia

96

Standard Service

Compartment

72

EvaporativeCondensing Unit

076C-100C

96

110C-150C

132

24

076C-100C

Cartridge 64 ft2

48 in.

Blank

48

Blank

24

110C-150C

Cartridge 80 ft2

72

48 in.

Blender &Angular or

56 sq ft Cartridge

72

Blender &64 sq ft Cartridge

96

48

VFDSection

48

All

Econ w/ Prop. Exh. Fans and

Back Return

Econ w/ Prop. Exh. Fans and

Bottom Return

Econ w/ Prop. Exh. & Side Return

120

96

72

(Does not affectcurb length)

(Does not affectcurb length)

Cat 219 43

Figure 32: RPE 076C-150C Blow-through Coil Section (NA Final Filters)

48

VFDSection

48

SoundAttenuator

Sound

Attenuator*

72

EvaporativeCondensing

Unit

132(Does not affect

curb length)

Air-cooledCondenser

96(Does not affect

curb length)

BlankCompartment

Standard Service

Vestibule

72

DischargePlenum

DischargePlenum

Mandatory

48

48

DX CoilMandatory

076C-100C 076C-100C076C-100C

(53.9 sq. Ft.)

24

(60.8 sq. Ft.)

110C-130C

(60.8 sq. Ft.)

48

(76.0 sq. Ft.)

72

140C-150C

(76.0 sq. Ft.)

72

BlankOptional

Blank

48

Steam/Hot Water

Electric

48

Gas

48

Blank

48

HeatMandatory

48

33” Dia

72

36” Dia

96

110C-150C

110C-150C

36” & 40” Dia

96

SupplyAir Fan

Mandatory

Blank

48

BlankOptional

24

48

24

FilterMandatory

OA Hood

0

Plenum

72

30%OA

72

Economizer

96

Econ / RAF

96

Outdoor/Return AirMandatory

Econ w/ Prop. Exh. & Back Reurn

Econ w/ Prop. Exh. & Bottom Return

Econ w/ Prop. Exh. & Side Return

120

72

Angular

Cartridge56 ft

2

076C-100C Only

076C-100C

Cartridge64 ft

2

48 in.

Blank

48

Blank

24

110C-150C

Cartridge80 ft

2

72

Blender &Angular or

56 sq ft Cartridge

72


9696

All

44 Cat 219

Figure 33: RPE 076 - C150C Draw-through Coil Section

48

VFDSection

48

SoundAttenuator

Sound

Attenuator*

72

Outdoor/Return AirMandatory

OutdoorAir Hood

0

Plenum

72

30%Outside Air

72

Economizer

96

Economizer w/Return Air Fan

96

FilterMandatory

BlankOptional

Blank

48

DX CoilMandatory

(53.9 sq. Ft.)

24

(60.8 sq. Ft.)

48

110C-130C

(60.8 sq. Ft.)

48

(76.0 sq. Ft.)

72

140C-150C

(76.0 sq. Ft.)

72

SupplyAir Fan

Mandatory

076C-100C 076C-100C076C-100C

33” Dia

72

36” Dia

96

110C-150C

110C-150C

36” & 40” Dia

96

HeatMandatory

Steam/Hot Water

48

Electric

48

Gas

48

Blank

48

BlankOptional

Blank

48

FinalFilter

Optional

(56 sq. Ft.)(076C-100C only)

48

(64 sq. Ft.)

72

(80 sq. Ft.)(110C-150C only)

96

Blank

48

Blank

72

DischargePlenum

Mandatory

DischargePlenum

48

Standard Service

Vestibule

BlankCompartment

72

Air-cooledCondenser

96(Does not affect

curb length)

Air-cooledCondenser

132(Does not affect

curb length)

Econ w/ Prop.Exh. Fans,

Back Ret.Fans

Econ w/ Prop.Exh. Fans,

Bottom Ret.Fans

Econ w/ Prop. Exh. & Side Ret. Fans

120

72

96

Gas orElectric Heat

With Gas orElectric Heat

CoolingOnly, Steam or Hot Water

With CoolingOnly, Steam or Hot Water

EvaporativeCondensing

Unit

24

48

24

Angular

Cartridge56 ft2

076C-100C Only

076C-100C

Cartridge64 ft2

48 in.

Blank

48

Blank

24

110C-150C

Cartridge80 ft2

72

Blender &Angular or

56 sq ft Cartridge

72


96

All

Cat 219 45

Typical Dimensions Exact Length varies with options and configuration

Figure 34: Typical Dimensions - RPE 076C-100C

Figure 35: Typical Dimensions - RPE 110C-150C

87.099.0

62.0 38.0

81.0

Walk-inServiceCompartment

10.0

72.048.0 96.0

100.097.0

96.0

432.0528.0

96.024.0

288.0 Drain Connection

48.0 48.0

10.0

87.099.0

62.046.0

81.0

100.097.0

24.096.0 96.0 48.0

456.0588.0

72.0 48.0 72.0 132.0


10.010.0


46 Cat 219

Figure 36: Typical Dimensions - RDE 076C-100C

Figure 37: Typical Dimensions - RDE 110C-150C

87.099.0

62.0 38.0

81.0

100.097.0

24.0 96.072.072.048.048.096.0

360.0456.0


10.0 10.0


87.099.0

62.046.0

81.0

100.097.0

24.096.0 72.0 48.0 96.0 132.072.0

408.0540.0


10.0 10.0


Cat 219 47

Electrical Knockout Locations

Figure 38: RPE & RDE Main Control Panel/ Discharge Plenum

Figure 39: RPE Electric Heat Section

Piping Entrance Locations

Figure 40: RPE & RDE Steam and Hot Water Heat Section

Figure 41: RPE 1500-2000MBH Gas Heat Section

Figure 42: RPE 500-1400MBH Gas Heat Section

Figure 43: Water Connection Knockout Locations in

Walk-in Service Compartment

Reference from leaving air end of section

0.9 Dia. K.O. (Qty=4)

3.0 Dia. K.O. (Qty=3)

3.0 Dia. K.O. (Qty=2)

0.9 Dia. K.O.

All Piping Entrance Holes Should Fall

Within This Area

Unit Size

076C-150C

� � � � � � � � � ! � � � * �

� � � � � � � � + � � ! � � � % �

! � , � � � � - � � � � � .

� # � � � / �

� � � � � 0 1 2

� ( � � �

Recommended Piping Entrance (Through the

Curb)

500 to 1400 MBH

Unit Size

076C-150C

3.125 Dia.(3)

.875 Dia. (3)

Water

Supply Water

Condenser End

Outside Base Rail

3.125 Dia

7.877.87

6.88

9.00 6.75

9.2611.63

14.0121.25

45.5050.50

48 Cat 219

Roof Curbs

Figure 44: Roof Curb

Note: Roof Curb must be installed level.

RDE & RPE 076-100

RDE & RPE 110-150

12.10.9 DIA K.O. QTY= 4

3.0 DIA K.O. QTY= 33.4

3.4

2.1 3.1 4.3

9.74.82.0

4.6INSIDEOF CURB

FIGURE A

G

G

C

C

F

F

E

RAOPENING

RAOPENING

SAOPENING

SAOPENING

38

46

R

R

Q

Q

K

K

E

F

F

B

B

B

B

N

N

P

P

Varies with Unit Selection

SEE FIGURE "A"

SEE FIGURE "A"

J

J

K

K

H

H

B

60 60

M

M M

AA

L

LL

Varies with Unit Selection

Dim RPE/RDE Dim RPE/RDE

B 88.00 K 5.00

C 62.00 L 100.00

E 87.00 M 8.00

F 1.50 N 2.00

G 6.80 P 4.00

H 81.00 Q 1.50

J 7.50 R 78.80

Cat 219 49

Figure 45: Roof Curb Cross Section A-A

Figure 46: Roof Curb Cross Section B-B

� � � �

� � � 3 � � � � 1 " �

� � � 4 � � 5 � 6 " , � � � � *

) � � � 7 ' � 8 � � � � � � � � �

' � � 6 � 9 � � � � � � 4 � � 5

# � � : � � � � � � � �

� � � 4 � � � � � � � � + 8 � � � � � � � " % � � .

; � � � � � * � 0 � � � � � � + 8 � � � � � � � " % � � .

( � � 4 � � � � � � � " % � � * � + 8 � � � � � � � " % � � .

� � � � � " % � � * � + 8 � � � � � � � " % � � .

� � � � � �

� � � � ( ' � � ) � � � ' � ' ' � )

1�

4

:

�

)

�

(

(

�

'

�

'

;� �

�

�

#

� �

1

�

�

�

)

#

(

'

;

�

� �

�

�

� � � �

� � � 3 � � � � 1 " �

� � � 4 � � 5 � 6 " , � � � � *

) � � � 7 ' � 8 � � � � � � � � �

' � � 6 � 9 � � � � � � 4 � � 5

# � � : � � � � � � � �

� � � 4 � � � � � � � � + 8 � � � � � � � " % � � .

; � � � � � * � 0 � � � � � � + 8 � � � � � � � " % � � .

( � � 4 � � � � � � � " % � � * � + 8 � � � � � � � " % � � .

� � � � � " % � � * � + 8 � � � � � � � " % � � .

� �

� ' � ' ' � #

50 Cat 219

Figure 47: Units with Side Discharge - Remove Access Door and Connect Ductwork as Shown

Table 29: Typical Cross Section - Internal Cabinet Clearance - Air in the Face

Unit Floor Base Rail

Condensing Section Walk-in Service Compartment

4272

42

3.6

3.5

1.81.8

6.0

1.82.2

5.2

8.5

3.0

85

CabinetHeight

Airflow85

AirflowRPE Units -

Discharge is out the side of the Discharge Plenum

RDE Units -

Discharge is out the side of the Supply Fan section.

RDE/RPE C D E F

076C-150C 91.7 96 91.8 95

C = Ceiling-to-floor (with liners)D = Door-to-door (with liners)E = Upright-to-upright, located between sectionsF = Base-to-base

Cat 219 51

Electrical Data

Table 30: Condensing Unit

Note: 1. Data given is for individual compressors and condenser fan motors. 2. AL = Across-the-Line start; PW = Part Winding start 3. Locked Rotor Amps for part winding start are for the first winding for 1 second. 4. 115 volt receptacle or marine light options require separate power service.

Unit

Size

Compressor Data Condenser Fan Motors *

HP Qty VoltageRLA Each LRA Each

HP QtyFLA

Each

LRA

EachAL PW AL PW

076C 30 2

208 106 106 470 292 1.5 4 5.0 26.0

230 106 106 470 292 1.5 4 5.0 26.0

460 53 53 235 141 1.5 4 2.5 13.0

575 36 36 217 130 1.5 4 2.0 11.5

089C 35 2

208 112 112 565 340 1.5 4 5.0 26.0

230 112 112 565 340 1.5 4 5.0 26.0

460 56 61 283 156 1.5 4 2.5 13.0

575 45 45 230 138 1.5 4 2.0 11.5

100C 40 2

208 152 152 660 440 1.5 4 5.0 26.0

230 140 140 594 340 1.5 4 5.0 26.0

460 71 71 297 170 1.5 4 2.5 13.0

575 54 54 235 135 1.5 4 2.0 11.5

110C 25 4

208 77 77 428 250 1.5 6 5.0 26.0

230 77 77 428 250 1.5 6 5.0 26.0

460 39 42 214 117 1.5 6 2.5 13.0

575 31 31 172 103 1.5 6 2.0 11.5

130C 30 4

208 106 106 470 292 1.5 6 5.0 26.0

230 106 106 470 292 1.5 6 5.0 26.0

460 53 53 235 141 1.5 6 2.5 13.0

575 36 36 217 130 1.5 6 2.0 11.5

140C

Comp. 1 & 330 2

208 106 106 470 292 1.5 3 5.0 26.0

230 106 106 470 292 1.5 3 5.0 26.0

460 53 53 235 141 1.5 3 2.5 13.0

575 36 36 217 130 1.5 3 2.0 11.5

140C

Comp. 2 & 435 2

208 112 112 565 340 1.5 3 5.0 26.0

230 112 112 565 340 1.5 3 5.0 26.0

460 56 61 283 156 1.5 3 2.5 13.0

575 45 45 230 138 1.5 3 2.0 11.5

150C 35 4

208 112 112 565 340 1.5 6 5.0 26.0

230 112 112 565 340 1.5 6 5.0 26.0

460 56 61 283 156 1.5 6 2.5 13.0

575 45 45 230 138 1.5 6 2.0 11.5

52 Cat 219

Table 31: Supply, Exhaust and Return Fan Motors

Note: 1. For 380/50/3 applications, 460/60/3 motors are used. Derate nameplate by 0.85 to obtain actual horsepower.

Table 32: 1.5 HP Spray Pump for All Sizes

Table 33: Optional Sump Heater

Fan Motor 208/60/3 230/60/3 460/60/3 (1) 575/60/3

HP Efficiency FLA LRA FLA LRA FLA LRA FLA LRA

5

High ODP 14.8 106 14 94 7 47 5.3 38

High TEFC 14.6 126 13.4 102.4 6.7 51.2 5.4 39

Premium ODP 15.7 110 13.6 96 6.8 48 5.2 38.4

7.5

High ODP 22.3 137 21.6 147.4 10.8 74.2 8.2 49

High TEFC 21.4 198 20.4 145.2 10.2 72.6 8.2 58

Premium ODP 22.3 185 20 122 10 80 7.4 52

10

High ODP 29.7 290 28 180 14 94 11 72

High TEFC 28.5 228 28.4 200 14.2 100 11.4 80

Premium ODP 29 247 25.8 192 12.9 106 10.3 76.6

15

High ODP 44.4 326 40.6 301 20.3 150.5 16.2 120

High TEFC 40.3 248 38.8 272 19.4 136 15.5 109

Premium ODP 43.4 269 37.8 233.6 18.9 117 14.1 94

20

High ODP 57 342 50 350 25 175 20 135

High TEFC 54 335 48 320 24 160 19.1 123

Premium ODP 57 377 49 322 24.5 160 18.9 130

25

High ODP 69.8 427 62 382 31 191 24.3 151

High TEFC 66 413 60 380 30 190 24.2 152

Premium ODP 70.5 384 61 380 30.5 190 24.2 125

30

High ODP 86.5 461 75 460 37.5 230 30 177

High TEFC 82 496 72 460 36.0 230 28.6 184

Premium ODP 83.3 506 72.4 448 36.2 224 29.8 178

40

High ODP 117 660 102 630 51 315 40 251

High TEFC 115 661 95 544 47.5 272 38 214

Premium ODP 110 660 96 630 48 315 38 245

50

High ODP 138 826 124 770 62 385 49.2 303

High TEFC 142 742 118 744 59 372 48 266

Premium ODP 137 955 120 752 60 376 47.5 332

60

High ODP 154 991 144 872 72 442 57.4 355

High TEFC 159 1035 140 1022 70 511 56 409

Premium ODP 159 1125 140 912 70 456 56 345

75

High ODP 189 1240 176 1108 88 553 71 505

High TEFC 196 1242 172 1132 86 566 68 447

Premium ODP 195 1240 170 1044 85 553 65.5 444

Voltage 208 230 460 575

FLA 4.8 4.8 2.4 2.0

Voltage 208 230 460 575

FLA 19.2 16.7 8.7 6.9

Cat 219 53

Supply Power Wiring

Table 34: Electric Heat

Table 35: Recommended Power Wiring

1. Units require three-phase power supply.

2. Allowable voltage tolerances:a. 60 Hertz

Nameplate 208V: Min. 187V, Max. 229VNameplate 230V: Min. 207V, Max. 253VNameplate 460V: Min. 414V, Max. 506VNameplate 575V: Min. 518V, Max. 633V

b. 50 HertzNameplate 380V: Min. 360V, Max. 418V

3. Minimum Circuit Ampacity (MCA) Calculation:

Note: If a unit is provided with multiple power connec-tions, each must be considered alone in selecting power wiring components.

MCA Calculation

The MCA is calculated based on the following formulas:

1. Units with cooling and all heating except electric heat MCA = 1.25 x largest load + sum of all other loads

2. On units with electric heat, the MCA is computed both in the cooling mode and the heating mode and the greater of the two values is used.

a. Heating Mode

Electric heat less than or equal to 50kW

MCA = 1.25 (sum of all loads including electric heat)

Electric heat greater than or equal to 50kW

MCA = 1.25 (sum of all SAF, RAF or EAF loads) plus electric heat load

Note: the compressor and condenser are not included in this calculation.

b. Cooling Mode

MCA = 1.25 x largest load + sum of all the other loads

Note: Control circuit ampacity does not need to be considered in the calculation for wire sizing ampacity. If the unit is provided with one or more fan section lights, they are powered from the separate 15 amp (minimum), 120V supply required by the NEC for the unit convenience outlet.

3. Size wires in accordance with Table 310-16 or 310-19 of the National Electrical Code.

4. Wires should be sized for a maximum of 3% voltage drop.

Model208/60/3 240/60/3 480/60/3 600/60/3

KW FLA Stages KW FLA Stages KW FLA Stages KW FLA Stages

80 59.8 166.0 4 79.6 191.5 4 79.6 95.7 4 79.6 76.6 4

100 74.7 207.4 4 99.5 239.4 4 99.5 119.7 4 99.5 95.7 4

120 89.7 249.3 4 119.4 287.2 4 119.4 143.6 4 119.4 114.9 4

160 119.7 332.0 4 159.2 383.0 4 159.2 191.5 4 159.2 153.2 4

200 149.5 414.7 4 199.0 478.7 4 199.0 239.4 4 199.0 191.5 4

240 179.4 497.7 6 238.8 574.5 6 238.8 287.2 6 238.8 229.8 6

280 209.2 580.7 4 278.6 670.2 4 278.6 335.1 4 278.6 268.1 4

320 239.2 664.0 4 318.4 766.0 4 318.4 383.0 4 318.4 306.4 4

Ampacity

No. Of

Power

Wires Per

Phase

No. Of

ConduitsWire Gauge

Insulation

Rating

(0°C)

130 1 1 1 75

150 1 1 1/0 75

175 1 1 2/0 75

200 1 1 3/0 75

230 1 1 4/0 75

255 1 1 250 75

285 1 1 300 75

310 1 1 350 75

335 1 1 400 75

380 1 1 500 75

400 2 2 3/0 75

460 2 2 4/0 75

510 2 2 250 75

570 2 2 300 75

620 2 2 350 75

670 2 2 400 75

760 2 2 500 75

765 3 3 250 75

855 3 3 300 75

930 3 3 350 75

54 Cat 219

Unit Weights

Components Unit Size

076C 089C 100C 110C 130C 140C 150C

Basic Unita

RPE Lifting Weight 14007 14022 14352 18978 19387 19403

RPE Operating Weight 15307 15322 15652 20278 20687 20703

RDE Lifting Weight 12580 12580 12872 17472 17859 17859

RDE Operating Weight 13880 13880 14172 18772 18889 18889

Outdoor/return Air Options

Return Air Plenum Included in Basic Unit Weight

0-30% O.A. Hood 262 262 262 262 262 262 262

100% O.A. Hood (Deduct) (71) (71) (71) (71) (71) (71) (71)

0-100% Economizer 1266 1266 1266 1266 1266 1266 1266

Exhaust Air Fan Assembly

2 Fans, Back Return 566

3 Fans, Back Return 826

2 Fans, Bottom Return 891

3 Fans, Bottom Return 1151

2 Fans, Side Return 1581

3 Fans, Side Return 1841

Filter Options

30% Pleated 6 6 6 6 6 6 6

65% Cartridge - Standard Flow 69 69 69 - - - -

65% Cartridge - Medium Flow 589 589 589 589 589 589 589

65% Cartridge - High Flow - - - 1100 1100 1100 1100




Filter Options - Blow Through Section (Final Filters) b




Supply Air Fan Assembly

33” Dia Airfoil (DWDI) 989 989 989 - - - -

36” Dia Airfoil (DWDI) 1719 1719 1719 1719 1719 1719 1719

40” Dia Airfoil (DWDI) - - - 1760 1760 1760 1760

44” Dia Airfoil (SWSI) 1304 1304 1304 1304 1304 1304 1304

49” Dia Airfoil (SWSI) 2300 2300 2300 2300 2300 2300 2300

Return Air Fan Assembly

44’’ Dia. Airfoil 971 971 971 971 971 971 971

Evaporator Coils - Aluminum Fins, Standard Airflow Face Area

3 Row, 8 Fpi 487 487 487 792 792 - -

3 Row, 10 Fpi 520 520 520 830 830 - -

3 Row, 12 Fpi 553 553 553 867 867 - -

4 Row, 8 Fpi 588 588 588 905 905 - -

4 Row, 10 Fpi 632 632 632 955 955 - -

4 Row, 12 Fpi 676 676 676 1005 1005 - -

5 Row, 8 Fpi 689 689 689 1022 1022 - -

5 Row, 10 Fpi 744 744 744 1085 1085 - -

5 Row, 12 Fpi 799 799 799 1147 1147 - -

Evaporator Coils - Aluminum Fins, High Airflow Face Area

3 Row, 8 Fpi 1179 1179 1179 1374 1374 1374 1374

3 Row, 10 Fpi 1217 1217 1217 1411 1411 1411 1411

3 Row, 12 Fpi 1254 1254 1254 1448 1448 1448 1448

4 Row, 8 Fpi 1292 1292 1292 1495 1495 1495 1495

4 Row, 10 Fpi 1342 1342 1342 1558 1558 1558 1558

4 Row, 12 Fpi 1392 1392 1392 1621 1621 1621 1621

5 Row, 8 Fpi 1409 1409 1409 1637 1637 1637 1637

5 Row, 10 Fpi 1469 1469 1469 1715 1715 1715 1715

5 Row, 12 Fpi 1528 1528 1528 1793 1793 1793 1793

Evaporator Coil - Copper Fins, Standard Airflow Face Area

3 Row, 8 Fpi 788 788 788 1133 1133 - -

3 Row, 10 Fpi 897 897 897 1256 1256 - -

Cat 219 55

3 Row, 12 Fpi 1005 1005 1005 1379 1379 - -

4 Row, 8 Fpi 989 989 989 1359 1359 - -

4 Row, 10 Fpi 1134 1134 1134 1523 1523 - -

4 Row, 12 Fpi 1278 1278 1278 1687 1687 - -

5 Row, 8 Fpi 1191 1191 1191 1591 1591 - -

5 Row, 10 Fpi 1372 1372 1372 1796 1796 - -

5 Row, 12 Fpi 1553 1553 1553 2001 2001 - -

Evaporator Coil - Copper Fins, High Airflow Face Area

3 Row, 8 Fpi 1520 1520 1520 1776 1776 1776 1776

3 Row, 10 Fpi 1643 1643 1643 1928 1928 1928 1928

3 Row, 12 Fpi 1766 1766 1766 2080 2080 2080 2080

4 Row, 8 Fpi 1746 1746 1746 2058 2058 2058 2058

4 Row, 10 Fpi 1910 1910 1910 2261 2261 2261 2261

4 Row, 12 Fpi 2074 2074 2074 2463 2463 2463 2463

5 Row, 8 Fpi 1978 1978 1978 2340 2340 2340 2340

5 Row, 10 Fpi 2183 2183 2183 2594 2594 2594 2594

5 Row, 12 Fpi 2388 2388 2388 2847 2847 2847 2847

Electric Heat

80 Kw 384 384 384 384 384 384 384

100 Kw 390 390 390 390 390 390 390

120 Kw 395 395 395 395 395 395 395

160 Kw 407 407 407 407 407 407 407

200 Kw 436 436 436 436 436 436 436

240 Kw 448 448 448 448 448 448 448

280 Kw 460 460 460 460 460 460 460

320 Kw 472 472 472 472 472 472 472

Gas Furnace

500, 640 Mbh 481 481 481 481 481 481 481

650, 790 Mbh 579 579 579 579 579 579 579

800, 1000 Mbh 650 650 650 650 650 650 650

1100, 1400 Mbh 845 845 845 845 845 845 845

1500 Mbh 1067 1067 1067 1067 1067 1067 1067

2000 Mbh 1082 1082 1082 1082 1082 1082 1082

Hot Water Coil

1 Row 424 424 424 424 424 424 424

2 Row 531 531 531 531 531 531 531

Steam Coil

1 Row, 6 Fpi 379 379 379 379 379 379 379

1 Row, 12 Fpi 412 412 412 412 412 412 412

2 Row, 6 Fpi 485 485 485 485 485 485 485

Accessory Items

Variable Frequency Drive - SAFc 150 150 150 150 150 150 150

Variable Frequency Drive - RAFc 100 100 100 100 100 100 100

Blender (Low cfm) c 632 632 632 632 632 632 632

Blender (High cfm) c 731 731 731 731 731 731 731

Plenum Options

Burglar Bars - Discharge 69 69 69 81 81 81 81

Burglar Bars - Return 114 114 114 114 114 114 114

Isolation Dampers - Discharge 106 106 106 125 125 125 125

Isolation Dampers - Return 172 172 172 172 172 172 172

Blank Section

4-foot, Unlined 651 651 651 651 651 651 651

6-foot, Unlined 1038 1038 1038 1038 1038 1038 1038

Insulation Linersd

2’’, 1.5 Lb. density insulation with Solid Liners:30 30 30 30 30 30 30

Weight Per Foot Of Unit Length

Sound Attenuators

Sound Attenuator with Gas or Electric Heat 1708

Sound Attenuator without Gas or Electric Heat 1321

Components Unit Size

076C 089C 100C 110C 130C 140C 150C

a.Basic unt consists of return air plenum, angular filter section, supply air fan section without fan or motor, cooling section without coil, condensing unit and service vestibule.b.Final filter option includes liners in the filter section and discharge plenum.c.Does not include weight of 4 ft. blank section.d. Excluding condensing unit section and vestibule.

56 Cat 219

Fan Motor Weights

Roof Curb WeightsCalculate the weight of the unit curb using the following equation and adding additional weights accordingly.

Note: Curb length does not include condenser length.

Additional Weights:

1. Cross supports:

• For curb length greater than 144 in, add 30 lb.• For curb length greater than 288 in, add 60 lb.• For curb length greater than 432 in, add 90 lb.• For curb length greater than 576 in, add 120 lb.

2. For condenser section support rail, add 139 lb. for sizes 076C-100C and 278 lb. for sizes 110C to 150C.

Example: RPE100C

Note: Roof curb weight should be considered for structural purposes

Motor HPWeight (lbs.)

Open Drip-Proof Totally Enclosed

5 82 85

7.5 124 140

10 144 170

15 185 235

20 214 300

25 266 330

30 310 390

40 404 510

50 452 570

60 620 850

75 680 910

Unit Size Weight Formula

All Base curb wt. (lb.) = 0.74 [200 + 2 x curb length (in)]

Component Lbs.

Basic unit 15,322

Economizer 1,266

30% efficiency filters 6

Burglar bars, supply 69

Burglar bars, return 114

36’’ airfoil supply fan 1,719

44’’ airfoil return fan 971

DX coil - 5-row 12 FPI, high airflow aluminum fins 1,528

Gas heat - 1000 mbh 650

SAF motor - 40 HP 404

RAF motor - 15 HP 185

Liners 1080

23,314

Liner Calculations ft

Section - Economizer 8

Filter 2

Supply fan 8

Heat 4

DX coil 4

Discharge plenum 4

Service Compartment 6

x 30 lbs. per ft. 36

1080

Cat 219 57

Engineering Guide Specification

RoofPak™ Singlezone Heating and Cooling Unit(s) model [RPE] [RDE]

General

A. The complete unit shall be [ETL/MEA] [ETL-Canada] listed. The burner and gas train for the unit furnace shall be [ETL/UL] [ETL Canada] [IRI/FIA] [FM] approved.

B. Each unit shall be specifically designed for outdoor rooftop application and include a weatherproof cabinet. Units shall be of a modular design with factory installed access sections available to provide maximum design flexibility. Each unit shall be [completely factory assembled and shipped in one piece] [split between the supply fan section and the heat section]. [RPE and RDE packaged units shall be shipped fully charged with Refrigerant [22] [407C]]. [All units split for shipment include a nitrogen holding charge only.]

C. The unit shall undergo a complete factory run test prior to shipment and factory test sheets shall be available upon request. The factory test shall include final balancing of the supply [and return] fan assemblies, a refrigeration circuit run test, a unit control system operations checkout, [test and adjustment of the gas furnace], a unit refrigerant leak test and a final unit inspection.

D. All units shall have decals and tags to indicate caution areas and aid unit service. Unit nameplates shall be fixed to the main control panel door. Electrical wiring diagrams shall be attached to the control panels. Installation, operating and maintenance bulletins and start-up forms shall be supplied with each unit.

E. Performance: All scheduled capacities and face areas are the minimum accepted value. All scheduled amps, KW, and HP are maximum accepted values that allow scheduled capacity to be met.

Cabinet, Casing and Frame

A. Standard double-wall construction for all side wall access doors and floor areas shall be provided with heavy gauge solid galvanized steel inner liners to protect insulation during service and maintenance. Insulation shall be a minimum of 1" thick, 3/4 lb. density neoprene coated glass fiber. Unit cabinet shall be designed to operate at total static pressures up to 6.5 inches w.g. Insulation on ceiling and end panels shall be secured with adhesive and mechanical fasteners. [26 gauge solid galvanized steel liners shall be provided throughout, allowing no exposed insulation within the air stream. All cabinet insulation, except floor panels, shall be a nominal 2" thick, 1 ½ lb. density, R6.5, glass fiber. Floor panels to be a minimum 1" thick, 3 lb. density, R4.2, glass fiber.] [Perforated liners shall be used in the supply and return air plenums, to improve sound attenuation] [All floor

panels shall be double wall construction and include a nominal 2" thick, 1 ½ lb. density, R6.5 glass fiber insulation.]

B. Exterior surfaces shall be constructed of pre-painted galvanized steel for aesthetics and long term durability. Paint finish to include a base primer with a high quality, polyester resin topcoat of a neutral beige color. Finished surface to withstand a minimum 750-hour salt spray test in accordance with ASTM B117 standard for salt spray resistance.

C. Service doors shall be provided on both sides of each section in order to provide user access to all unit components. Service doors shall be constructed of heavy gauge galvanized steel with galvanized steel interior liners. All service doors shall be mounted on multiple, stainless steel hinges and shall be secured by a stainless steel latch system that is operated by a single handle. The latch system shall feature a staggered engagement for ease of operation and a safety catch shall protect the user from injury in case a positive pressure door is opened while the fan is operating. Removable panels, or doors secured by multiple, mechanical fasteners are not acceptable.

D. The unit base frame shall be constructed of 13-gauge pre-painted galvanized steel. The unit base shall overhang the roof curb for positive water runoff and shall have a formed recess that seats on the roof curb gasket to provide a positive, weather tight seal. Lifting brackets shall be provided on the unit base with lifting holes to accept cable or chain hooks.

Supply, Return and Exhaust Fans

A. All return and supply fan assemblies shall be statically and dynamically balanced at the factory, including a final trim balance, prior to shipment. All fan assemblies shall employ solid steel fan shafts. Heavy-duty pillow block type, self-aligning, grease lubricated ball bearings shall be used. Bearings shall be sized to provide an L-50 life at 200,000 hours. The entire fan assembly shall be isolated from the fan bulkhead and mounted on [rubber-in-shear isolators] [spring isolators] [spring isolators with seismic restraints]. [Fixed] [Adjustable] pitch V-belt drives with matching belts shall be provided. V-belt drives shall be selected at [the manufacturer's standard service factor] [1.5 times fan brake horsepower].

B. Return and supply fan motors shall be heavy-duty 1800 rpm [open drip-proof (ODP)] [totally enclosed TEFC] type with grease lubricated ball bearings. [Motors shall be high efficiency and meet applicable EPACT requirements.] [Motors shall be premium efficiency.] Motors shall be mounted on

58 Cat 219

an adjustable base that provides for proper alignment and belt tension adjustment.

C. DWDI Supply Air Fan (RPE)

1. Supply fan shall be a double width, double inlet (DWDI) airfoil centrifugal fan. All fans shall be mounted using shafts and hubs with mating key-ways.

2. All fans shall be Class II type and fabricated from heavy-gauge aluminum. Fan blades shall be continuously welded to the back plate and end rim.

D. SWSI Supply Air Fan (RDE)

1. Supply fan shall be single-width, single inlet (SWSI) airfoil centrifugal fan.

2. The fan wheel shall be Class II construction and fabricated from painted steel with fan blades continuously welded to the back plate and end rim. Fans shall be mounted using shafts and hubs with mating keyways.

E. Return Air Fans

1. A single width, single inlet (SWSI) airfoil centrif-ugal return air fan shall be provided. The fan wheel shall be Class II construction and fabri-cated from heavy-gauge aluminum with fan blades continuously welded to the back plate and end rim. The fan shall be mounted using shafts and hubs with mating keyways.

2. Exhaust or relief fans are not acceptable.

F. Exhaust Fans

1. Belt drive propeller exhaust fans shall be pro-vided. Propeller fans shall be constructed with fabricated steel, and shall be securely attached to fan shafts. All fans shall be statically and dynamically balanced.

2. Motors shall be permanently lubricated, heavy-duty type, carefully matched to the fan load.

3. Ground and polished steel fan shafts shall be mounted in permanently lubricated, sealed ball bearing pillow blocks. Bearings shall be selected for a minimum (L10) life in excess of 100,000 hours at maximum cataloged operating speeds. Drives shall be sized for a minimum of 150 per-cent of driven horsepower. Pulleys shall be of the fully machined cast iron type, keyed and securely attached to wheel and motor shafts. Motor sheaves shall be adjustable for system balancing.

4. Drive frame and panel assemblies shall be galva-nized steel. Drive frames shall be formed chan-nels and panels shall be welded construction.

5. The axial exhaust fans shall bear the AMCA Cer-tified Ratings Seal for both sound and air perfor-mance. Return fans are not acceptable.

G. The [supply air fan] [supply and return/exhaust air fan] sections shall be provided with an expanded metal belt guard.

VAV, Variable Frequency Drive Control

A. An electronic variable frequency drive shall be provided for the supply air fan [and another for the return or exhaust fan]. [Each drive shall be factory installed in a designated access section upstream of the cooling coil, in a manner that the drive[s] are directly cooled by the mixed air stream]. [Each drive shall be mounted in the fan section]. Drives shall meet UL Standard 95-5V and the variable frequency drive manufacturer shall have specifically approved them for plenum duty application. The completed unit assembly shall be listed by a recognized safety agency, such as ETL. Drives are to be accessible through a hinged door assembly complete with a single handle latch mechanism. Mounting arrangements shall not expose drives to high temperature, unfiltered ambient air.

B. The unit manufacturer shall install all power and control wiring. [A manual bypass contactor arrangement shall be provided. The bypass arrangement will allow fan operation at full design CFM, even if the drive has been removed for service]. [Line reactors shall be factory installed for each drive].

C. The supply air fan drive output shall be controlled by the factory installed main unit control system and drive status and operating speed shall be monitored and displayed at the main unit control panel. [The supply and return/exhaust fan drive outputs shall be independently controlled in order to provide the control needed to maintain building pressure control. Supply and return/exhaust air fan drives that are slaved off of a common control output are not acceptable.]

D. All drives shall be factory run tested prior to unit shipment.

Electrical

A. Unit wiring shall comply with NEC requirements and with all applicable UL standards. All electrical components shall be UL recognized where applicable. All wiring and electrical components provided with unit shall be number and color-coded and labeled according to the electrical diagram provided for easy identification. The unit shall be provided with a factory wired weatherproof control panel. A terminal board shall be provided for field control wiring connections. Branch short circuit protection, 115-volt control circuit transformer and fuse, system switches, high temperature sensor, and a 115 volt receptacle with a separate electrical connection shall also be provided with unit. [A second 115v power supply is required to power the optional unit heater.] Each compressor and condenser fan motor shall be furnished with contactors and inherent thermal overload protection. Supply and return fan motors shall have contactors and current sensing overload protection. Knockouts shall be provided in the bottom of the main control panels for field wiring

Cat 219 59

entrance. All 115-600 volt internal and external wiring between control boxes and components shall be protected from damage by raceways or conduit.

B. [A single main terminal block shall be provided for connecting electrical power at the unit.] [A single non-fused main disconnect switch shall be provided for connecting electrical power at the unit. The switch shall be mounted internal to the control panel and operated by an externally mounted handle. External handle to be designed to prohibit opening of the control panel door without the use of a service tool.] [Dual non-fused disconnect switches shall be provided for connecting electrical power at the unit. One switch shall service the unit supply (and return) (and exhaust) fan(s) and the unit control panel. The second switch shall service the unit condensing section. Switches shall be mounted internal to the control panel and operated by an externally mounted handle. External handle to be designed to prohibit opening of the control panel door without the use of a service tool.]

C. [A factory installed and wired marine service light, with switch and receptacle, shall be provided in the supply air fan section. The separate, main unit service receptacle electrical circuit shall also power the light circuit.] [Factory installed and wired marine service lights, with switches and receptacles, shall be provided in the supply air and return/exhaust air fan sections. The separate, main unit service receptacle electrical circuit shall also power the light circuits.]

D. [Part winding start shall be provided for the unit compressors to reduce inrush current at start-up.]

E. [Power factor capacitors shall be factory mounted and wired to the unit (compressors) (supply and return air fan motors) (compressors and supply and return air fan motors). Power factor capacitors shall be selected to provide correction to a minimum of 0.90.]

F. [Phase failure and under voltage protection shall be provided to prevent damage from single phasing, phase reversal, and low voltage conditions.]

G. Ground fault protection shall be provided to protect against arcing ground faults.]

H. [Factory mounted smoke detectors shall be installed in the (supply air opening) (supply and return air openings). Smoke detectors to be ionization type, which responds to invisible products of combustion without requiring the sensing of heat, flame or visible smoke. Upon sensing smoke, the unit shall provide a control output for use by building management system such that the building management system can issue the required safety commands.]

I. Unit to have factory mounted ultraviolet germicidal irradiation (UVGI) lamps located on the leaving air side of the cooling coil. UVGI lamps to constantly irradiate the cooling coil and drain pan surfaces

with light in the 254-nanometer wavelength of the light spectrum (UV-C) for germicidal effect. View port(s) with glass rated to block ultraviolet light shall be included to allow for visual inspection during operation. Automatic disconnect switches shall kill power to the lamps whenever an associated door is opened.

Lamp and fixture to consist of housing, power source, lamp sockets and lamp. Housing shall be type 304 stainless steel and all components are to be constructed to withstand saturated air conditions typical of HVAC environments. Lamps are to be designed to facilitate simple fixture to fixture plug-in for AC power. Power source to provide maximum radiance and reliability at UL/C-UL Listed temperatures of 55-135°F. Power source to include RF and EMI suppression. Lamps to be high-output hot cathode, T8 diameter, medium I-pin type that produces UVGI of 254nm. Lamps to produce the specified output at 500 fpm and air temperatures of 55-135°F.

Lamps and fixtures shall be UL/C-UL listed and the complete equipment/UVGI light package shall include Intertek Services Inc. (ETL) safety agency certification.

Heating and Cooling Sections

Cooling

A. [The cooling coil section shall be installed in a blow through configuration, downstream of the supply air fan. A factory-tested diffuser shall be used in order to provide air distribution across the cooling coil. A blow through coil is specified to minimize the impact of fan motor heat. Scheduled supply air temperature (SAT) is design cooling SAT at the unit discharge after all fan motor heat is considered and equals leaving air temperature (LAT) from a blow through DX coil. A draw through alternative must meet scheduled SAT after all fan motor heat is added to the draw through DX LAT. A draw through submittal must clearly provide DX coil LAT, fan motor heat temperature rise, and unit SAT.] [The cooling coil section shall be installed in a draw through configuration, upstream of the supply air fan.] The coil section shall be complete with factory piped cooling coil and sloped drain pan. Hinged access doors on both sides of the section shall provide convenient access to the cooling coil and drain pan for inspection and cleaning.

B. Cooling coil performance schedule is based on mixed air and coil leaving air temperatures, not including fan motor heat. Manufacturer shall add motor heat [to the mixed air to calculate DX coil entering air temperature on blow through designs] [to the DX coil LAT to calculate unit SAT on draw through models.] Scheduled total and sensible capacities are gross capacities, are minimum accepted values, and do not include fan motor heat

C. Direct expansion (DX) cooling coils shall be fabricated of seamless 1/2” diameter high efficiency copper tubing that is mechanically

60 Cat 219

expanded into high efficiency [aluminum] [copper] plate fins. Coils shall be a multi-row, staggered tube design with a minimum of [3] [4] [5] rows and a maximum of [8] [10] [12] fins per inch. All multiple compressor units shall have two independent refrigerant circuits and shall use an interlaced coil circuiting that keeps the full coil face active at all load conditions.

D. All coils shall be factory leak tested with high pressure air under water.

E. [A painted galvanized steel, positively sloped drain pan shall be provided with the cooling coil.] [A stainless steel, positively sloped drain pan shall be provided with the cooling coil.] The drain pan shall extend beyond the leaving side of the coil and underneath the cooling coil connections. The drain pan shall have a minimum slope of 1/8 in. per foot to provide positive draining. The drain pan shall be connected to a threaded drain connection extending through the unit base. Units with stacked cooling coils shall be provided with a secondary drain pan piped to the primary drain pan.

Hot Water Heating

F. A [1] [2] row hot water heating coil shall be factory installed in the unit heat section. Coils shall be fabricated of seamless 5/8 in. diameter copper tubing that is mechanically expanded into high efficiency HI-Fá rippled and corrugated aluminum plate fins. All coil vents and drains shall be factory installed. [The hot water heat section shall be installed downstream (RPE) of the supply air fan. A factory-tested diffuser shall be used in order to provide air distribution across the coil.] [The hot water heat section shall be installed upstream (RDE) of the supply air fan.] Hinged access doors on both sides of the unit shall provide convenient access to the coil and valve for inspection and cleaning.

G. [A factory installed three-way modulating control valve and spring return valve actuator shall provide control of the hot water coil. The valve actuator shall be controlled by the factory installed main unit control system]

H. [Ethylene glycol] [propylene glycol] shall be added to the hot water circuit to protect against coil freeze-up.]

I. [A factory installed, non-averaging type freezestat shall be factory installed to provide additional protection against coil freeze-up.]

J. Coils shall be factory leak tested with high pressure air under water.

Steam Heating

K. A [1] [2] row, [6] [12] fin per inch steam heating coil shall be factory installed in the unit heat section. Coils shall be fabricated of seamless 5/8 in. diameter copper tubing that is mechanically expanded into high efficiency HI-F rippled and corrugated aluminum plate fins. Steam coils shall be of the jet distributing type. [The steam heat

section shall be installed downstream (RPE) of the supply air fan. A factory-tested diffuser shall be used in order to provide air distribution across the coil.] [The steam heat section shall be installed upstream (RDE) of the supply air fan.] Hinged access doors shall provide convenient access to the coil and valve for inspection and cleaning.

L. [A factory installed two-way modulating control valve and spring return valve actuator shall provide control of the steam coil. The valve actuator shall be controlled by the factory installed main unit control system]

M. [A factory installed, non-averaging type freezestat shall be factory installed to provide some protection against coil freeze-up.]

N. Coils shall be factory leak tested with high pressure air under water.

Gas Heating (RPE Only)

O. A natural gas fired furnace shall be installed in the unit heat section. The heat exchanger shall include a type 321 stainless steel cylindrical primary combustion chamber, a type 321 stainless steel header, type 321 stainless steel secondary tubes and type 321 stainless steel turbulators. Carbon and aluminized steel heat exchanger surfaces are not acceptable. The heat exchanger shall have a condensate drain piped to the unit exterior. Clean out of the primary heat exchanger and secondary tubes shall be accomplished without removing casing panels or passing soot through the supply air passages. The furnace section shall be positioned downstream of the supply air fan.

P. [The furnace will be supplied with a modulating forced draft burner. The burner shall be controlled for low fire start. The burner shall be capable of continuous modulation between 33% and100% of rated capacity and shall operate efficiently at all firing rates.] [The furnace shall be supplied with a McQuay SuperMod™ forced draft burner capable of continuous modulation between 5% and 100% of rated capacity, without steps.] The burner shall operate efficiently at all firing rates. The burner shall have proven open damper low-high-low pre-purge cycle, and proven low fire start. The combustion air control damper shall be in the closed position during the off cycle to reduce losses. The burner shall be rated for operation and full modulation capability at inlet gas pressures down to [5.0 in. W.C. (models 1100, 1400, 1500)] [5.5 in. W.C. (model 500)] [6.0 in. W.C. (model 2000)] [6.5 in. W.C. (models 790, 800, 1000)] [7.0 in. W.C. (models 640, 650)].[The shutoff cock and test cock shall be fully ported ball valves.]

Q. The burner shall be specifically designed to burn natural gas and shall include a microprocessor based flame safeguard control, combustion air proving switch, pre-purge timer and spark ignition. The gas train shall include redundant gas valves, [maximum 0.5psi pressure regulator] [2-3psi high pressure regulator] [5-10psi high pressure

Cat 219 61

regulator], shutoff cock, pilot gas valve, pilot pressure regulator, and pilot cock.

R. [The gas burner shall be controlled by the factory installed main unit control system]

S. The burner shall be fired, tested and adjusted at the factory. Final adjustments shall be made in the field at initial start-up by a qualified service technician to verify that installation and operation of the burner is according to specifications.

Electric Heating (RPE Only)

T. Staged electric heating coils shall be factory installed in the unit heat section. Heating coils shall be constructed of a low watt density, high nickel-chromium alloy resistance wire, mechanically stacked and heli-arc welded to corrosion resistant terminals. A corrosion resistant heavy gauge rack shall support the elements. Safety controls shall include automatic reset high limit control for each heater element with manual reset backup line break protection in each heater element branch circuit (Note: Manual reset not provided when ETL-Canada label is provided). Heating element branch circuits shall be individually fused to maximum of 48 Amps per NEC requirements. The electric heat section shall be positioned downstream of the supply air fan.

U. [The electric heat elements shall be controlled by the factory installed main unit control system]

Cooling Only

V. A blank heat section shall be provided between the supply fan and blow-thru cooling coil section.

Filters

Draw Thru Filters

A. Unit shall be provided with a draw-through filter section. The filter section shall be supplied complete with the filter rack as an integral part of the unit. The draw-through filter section shall be provided with [panel] [cartridge] filters.

B. [2" thick AmericanAirFilter 30% efficient pleated panel filters shall be provided. Filters shall be frame mounted and shall slide into galvanized steel racks contained within the unit. Filters shall be installed in an angular arrangement to maximize filter area and minimize filter face velocity. Filters shall be accessible from both sides of the filter section.]

C. [12" deep [60-65%] [90-95%] efficient, UL Std. 900, Class 1, AmericanAirFilter cartridge filters shall be provided. 2" panel, 30% efficient pre-filters shall be included. Cartridge filters shall consist of filter media permanently attached to a metal frame and shall slide into a gasketed, extruded aluminum rack contained within the unit. The filter rack shall have secondary gasketed, hinged end panels to insure proper sealing. Filters shall be accessible from both sides of the filter section.]

D. [[30% efficient pleated] [60-65% efficient cartridge] [90-95% efficient cartridge] filters shall be provided with INTERSEPT™ antimicrobial treatment.]

Final Filters (RPE Only)

E. Final Filters - Unit shall be provided with a final filter section. The final filter section shall be supplied complete with the filter rack as an integral part of the unit. The final filter section shall be provided with cartridge filters.

F. 12" deep 90-95% efficient, UL Std. 900, Class 1, AmericanAirFilter cartridge filters shall be provided. For units with gas or electric heat, AmericanAirFilter High Temperature cartridge filters rated for 500° F shall be used. Cartridge filters shall consist of filter media permanently attached to a metal frame and shall slide into a gasketed, extruded aluminum rack contained within the unit. The filter rack shall have secondary gasketed, hinged end panels to insure proper sealing. Filters shall be accessible from both sides of the filter section.

G. [Filters shall be provided with INTERSEPT™ antimicrobial treatment.]

Outdoor / Return Air Section

Return Air Plenum

A. Unit shall be provided with a return air plenum for handling 100% re-circulated air. The 100% return air plenum shall allow return air to enter from the [bottom] [back] of the unit.

Return Air Plenum with 0 to 30% Outdoor Air Hood

B. A return air plenum shall be provided with a 0 to 30% outdoor air hood. The hood shall allow outdoor air to enter at the back of the return air plenum. The outdoor air hood shall be factory installed and constructed from galvanized steel finished with the same durable paint finish as the main unit. The hood shall include a bird screen to prevent infiltration of foreign materials and a rain lip to drain water away from the entering air stream. The return air plenum shall allow return air to enter from the [bottom] [back] of the unit.

0 - 100% Outdoor Air Economizer

C. Unit shall be provided with an outdoor air economizer section. The 0 to 100% outside air economizer section shall include outdoor, return, and exhaust air dampers. Outdoor air shall enter from both sides of the economizer section through horizontal, louvered intake panels complete with rain lip and bird screen. The floor of the outdoor air intakes shall provide for water drainage. The economizer section shall allow return air to enter from the [bottom] [back] of the unit. The outside and return air dampers shall be sized to handle 100% of the supply air volume. The dampers shall be opposed sets of parallel blades, arranged vertically to converge the return air and outdoor air streams in multiple, circular mixing patterns.

62 Cat 219

D. McQuay UltraSeal™ low leak dampers shall be provided on outdoor and return dampers. Damper blades shall be fully gasketed and side sealed and arranged horizontally in the hood. Damper leakage shall be less than 0.5% at 1.5 inches static pressure differential. Leakage rate to be tested in accordance with AMCA Standard 500. Damper blades shall be operated from multiple sets of linkages mounted on the leaving face of the dampers.

E. A barometric exhaust damper shall be provided to exhaust air out of the back of the unit. [An electric actuator shall provide positive closure of the exhaust damper.] Exhaust louvers and a bird screen shall be provided to prevent infiltration of rain and foreign materials. Exhaust damper blades shall be lined with urethane gasketing on contact edges.

F. [Control of the outdoor or return dampers shall be by a factory installed actuator. Damper actuator shall be of the modulating, spring return type. If outdoor air is suitable for “free” cooling, the outdoor air dampers shall modulate in response to the unit's temperature control system.] [An adjustable enthalpy control shall be provided to sense the dry-bulb temperature and relative humidity of the outdoor air stream to determine if outdoor air is suitable for “free” cooling.] [A comparative enthalpy control shall be provided to sense and compare enthalpy in both the outdoor and return air streams to determine if outdoor air is suitable for “free” cooling.]

DesignFlow™ Minimum Outdoor Air Measurement

and Control

G. The 0 - 100% outdoor air economizer system shall include the DesignFlow minimum outdoor air control systems that directly measures the total mass volume of air flowing through the outdoor air intakes. The unit's control panel shall automatically adjust the outdoor damper position to maintain minimum outdoor air cfm. The airflow station shall be capable of accurately measuring outdoor air volume within 5% to continuously satisfy the requirements of ASHRAE 62 - 1999. Third party verification of measurement accuracy shall be verified by a nationally recognized independent testing agency.

100% OA Hood

H. Unit shall be provided with a 100% outdoor air hood. The 100% outdoor air hood shall allow outdoor air to enter from the back of the unit, at the draw-through filter section. The outdoor air hood shall be factory installed and constructed from galvanized steel finished with the same durable paint finish as the main unit. The hood shall include a bird screen to prevent infiltration of foreign materials and a rain lip to drain water away from the entering air stream.

I. McQuay UltraSeal™ low leak dampers shall be provided. Damper blades shall be fully gasketed

and side sealed and arranged vertically in the hood. Damper leakage shall be less than 0.5% at 1.5 inches static pressure differential. Leakage rate to be tested in accordance with AMCA Standard 500. Damper blades shall be operated from multiple sets of linkages mounted on the leaving face of the dampers. [Control of the dampers shall be from a factory installed, two-position actuator.]

Access

A. The unit shall be provided with factory installed access sections located [upstream] [downstream] [upstream and downstream] of the supply air fan, as shown on the unit drawing. Access sections shall have hinged access doors on both sides of the section and shall have the same construction features as the rest of the unit.

Static Air Mixer (Air Blender)

A. A static air mixing device shall be factory installed between the outside/return air section and the filter section. The static air mixer shall be installed with proper upstream and downstream distances. The mixing device shall perform at face velocities from 500fpm through 2500fpm with no loss in mixing performance. The mixing device shall provide mixing and distribution of the outside and return air streams to minimize the threat of coil freeze-up during operation and to improve temperature control.

B. Acceptable manufacturers are Blender Products and Kees.

Sound Attenuator (RPE Only)

A. A sound attenuator section shall be provided as an integral part of the unit to attenuate fan noise at the source. The attenuator shall include a variable range of splitter thickness and air passages shall be provided to optimize acoustic performance and energy conservation. The section shall be perforated double-wall construction located downstream of the supply fan. Hinged access doors shall be provided on both sides of the section and shall have the same construction as the rest of the unit. [The sound attenuator shall have Tedlar mylar coating for moisture protection]. Combustion rating for the silencer acoustic fill shall not be greater than the following UL fire hazard classification:

Flame Spread ...............................................15

Fuel Contributed ...........................................0

Smoke Developed ........................................0

Tested in accordance with UL Test Procedure 723.

B. The attenuator rating shall be determined using the duct-to-reverberant room test method which provides for airflow in both directions through the attenuator in accordance with latest version of

Cat 219 63

ASTM specification E-477. Insertion Loss Ratings (ILR) shall be:

Octave Band at Center Frequency (Hz)

C. Manufacturer shall provide certified test data on dynamic insertion loss, self generated sound power levels, and aerodynamic performance for reverse and forward flow test conditions to the design professional in writing as least 10 days prior to the bid.

Discharge And Return Plenum Accessories

A. A supply air discharge plenum shall be provided. [The plenum section shall be lined with a perforated acoustic liner to enhance sound attenuation.] The plenum section shall have a [bottom] [side] discharge opening.

B. A combination burglar bar/safety grate shall be provided in the [bottom return air opening] [bottom supply air opening] [bottom return and supply air openings]. Burglar bar/safety grate shall be made of 3/4 in. diameter ground and polished steel shaft welded to a galvanized steel frame.

C. Isolation dampers shall be provided in the [bottom return air opening] [bottom supply air opening] [bottom return and supply air openings]. [A two-position actuator shall be provided to close the dampers when the fans are not running.]

Condensing Unit Section

A. RPE, RDE Evaporative Cooled Condenser

1. Condenser coils shall be multi-row and fabricated from 5/8 in. high efficiency copper tubing mechanically bonded to polymer, corrosion resistant, tube sheet supports. The condenser coil shall be removable for service without disas-sembling the unit.

2. At least four condenser fans shall be provided for back up protection. Condenser fans shall be direct drive, propeller type designed for low tip speed, vertical air discharge, and include service guards. Fan blades shall be constructed of cor-rosion resistant, reinforced polypropylene. Con-denser fan motors shall be severe-duty, externally protected, three-phase, non-reversing, totally enclosed type with permanently lubricated ball bearings.

3. Condenser fan capacity shall be controlled to allow compressor operation down to 45° F ambi-ent.

4. All wetted surfaces of the spray compartment shall be constructed of corrosion resistant stain-less steel. The sump can be separated into mul-tiple sections and each can be individually

removed without disassembling the unit. The entire sump is 2-dimensionally sloped to the drain and constructed of stainless steel. [A fully wired sump heater complete with thermostat control shall be provided.]

5. Removable mist eliminators are provided between the condenser coil and fans. Air intake shutters separate the sump from sunlight to pre-vent microbial growth.

6. A walk in service vestibule contains the electrical components and water spray pump for the con-densing unit. It also includes hinged access doors on both sides of the unit, two fully wired marine lights, a ventilation fan, electrical outlet, and manual shutter such that conditioned air can be used to cool the vestibule. Space shall be allowed for a field installed water treatment sys-tem including wall-mounted controller, control valves, and floor-mounted chemical tanks. The floor under the water pump, PVC tubing and water treatment system shall include a drain pan, for protection against water leaks, and a walking grate that is raised above the pan. [A fully wired 1.5KW unit heater shall be installed and wired complete with thermostat on-off con-trol.]

7. The spray system includes PVC tubing, [1.5 HP, size 76-100] [2 HP, size 110-150] pump, single field water connection, single field drain/ bleed connection and water treatment connections. The spray nozzles shall be removable, clog resistant and spray water across a 150° arc. The spray system shall include a [manually] [manual and solenoid] operated drain valve plus a float controlled solenoid that automatically maintains proper sump water levels.

8. [An electric sump heater shall be provided, including heat tape on all external piping.]

B. Reciprocating Compressors

1. Each unit shall have multiple, heavy-duty Cope-land Discus®, semi-hermetic, reciprocating com-pressors.

2. Each compressor shall include reversible, posi-tive displacement oil pump, suction and dis-charge line service valves, crankcase heater, high efficiency blocked suction unloading, and three-leg inherent motor overload protection.

3. Compressors shall be isolated with [resilient rub-ber isolators] [spring isolators with vibration elim-inators in the suction and discharge lines] to decrease noise transmission.

4. The unit shall have two independent refrigera-tion circuits. Each circuit shall be complete with a liquid line solenoid valve, low pressure control, [filter-drier] [replaceable core filter drier], liquid moisture indicator/sight-glass, thermal expan-sion valve, liquid line shutoff valve with charging port, a manual reset high pressure safety switch, high pressure relief device and pump down switch. The thermal expansion valve shall be

ILR 63 125 250 500 1000 2000 4000 8000

Standard

Attenuator7 9 22 28 29 29 18 12

Mylar

Coated6 10 20 16 14 18 13 12

64 Cat 219

capable of modulation from 100% to 25% of its rated capacity. Sight-glasses shall be accessible for viewing without disrupting unit operation.

5. Refrigeration capacity control shall be accom-plished with a combination of compressor cycling and high efficiency blocked suction unloading. All compressor capacity control staging shall be controlled by the factory installed main unit con-trol system.

6. [Constant air volume, zone temperature control - To maintain desired temperature control, the unit shall have a minimum of [four] [six] [eight] steps of capacity control.]

7. [Variable air volume, discharge temperature control - To maintain desired temperature con-trol, the unit shall have a minimum [six] [eight] steps of capacity control.]

C. Hot gas bypass control shall be factory installed on one [both] refrigerant circuits. Hot gas bypass control shall include a modulating hot gas bypass control valve, integral solenoid valve, all associated piping and be automatically operated by the units microprocessor control.

Roof Curb

A. A prefabricated 12-gauge galvanized steel, mounting curb, designed and manufactured by the unit manufacturer, shall be provided for field installation prior to unit shipment. The roof curb shall be a full perimeter type with complete perimeter support of the air handling section and rail support of the condensing section. Supply and return opening duct frames shall be provided as part of the curb structure allowing duct connections to be made directly to the curb prior to unit arrival. The curb shall be a minimum of 16" high and include a nominal 2" x 4" wood nailing strip. Gasket shall be provided for field mounting between the unit base and roof curb.

Controls

A. Each unit shall be equipped with a complete MicroTech® II microprocessor based control system. The unit control system shall include all required temperature and pressure sensors, input/output boards, main microprocessor and operator interface. The unit control system shall perform all unit control functions including scheduling, temperature control, static pressure control, alarms, unit diagnostics and safeties. All boards shall be individually replaceable for ease of service. All microprocessors, boards, and sensors shall be factory mounted, wired and tested.

B. The microprocessor shall be a stand-alone DDC controller not dependent on communications with any on-site or remote PC or master control panel. The microprocessor shall maintain existing set points and operate stand alone if the unit loses either direct connect or network communications. The microprocessor memory shall be protected from voltage fluctuations as well as any extended

power failures. All factory and user set schedules and control points shall be maintained in nonvolatile memory. No settings shall be lost, even during extended power shutdowns.

C. The main microprocessor shall support an RS-232 direct connection to a product service tool or a modem. A [BACnet IP] [BACnet MSTP] [LonWorks] communications port shall be provided for direct communication into the BAS network. [The controller shall be LonMark certified.]

D. All digital inputs and outputs shall be protected against damage from transients or wrong voltages. Each digital input and digital output shall be equipped with an LED for ease of service. All field wiring shall be terminated at a separate, clearly marked terminal strip.

E. The microprocessor memory shall be protected from all voltage fluctuations as well as any extended power failures. The microprocessor shall support an RS-232 direct connect from an IBM PC or 100% true compatible using MicroTech software. The microprocessor shall maintain existing set points and operate stand alone if the rooftop loses either direct connect or network communications.

F. The microprocessor shall have a built-in time schedule. The schedule shall be programmable from the unit keypad interface. The schedule shall be maintained in nonvolatile memory to insure that it is not lost during a power failure. There shall be one start/stop per day and a separate holiday schedule. The controller shall accept up to sixteen holidays each with up to a 5-day duration. Each unit shall also have the ability to accept a time schedule via BAS network communications.

G. [The unit shall include a night setback or setup function and a space sensor shall be provided by the manufacturer. The control contractor shall be responsible for wiring between the unit and space sensor. The sensor shall include a zone sensor with tenant override switch [and a heating and cooling set point adjustment (CAV-ZTC only.)]

H. User interface [UI]

1. The keypad/display character format shall be 20 characters x 4 lines. The character font shall be a 5 x 8 dot matrix. The display shall be a super twist liquid crystal display (LCD) with black char-acters on yellow background providing high visi-bility. The display form shall be in plain English coded formats. Lookup tables are not acceptable

2. The keypad shall be equipped with 8 individual touch-sensitive membrane key switches. All con-trol settings shall be password protected from changes by unauthorized personnel.

3. [Both a unit mounted and remote mounted UI shall be provided per unit. A unit-mounted switch brings either the unit mounted or remote mounted UI into control. The control contractor is responsible for wiring between the unit and the remote UI.]

Cat 219 65

• The maximum wiring distance to the remote UI is 1200 feet.

• Optical isolation shall protect the main unit con-troller from remote UI wiring problems

• The remote UI shall be provided with the same keypad/ display and have identical functionality to the unit mounted UI.

I. The display shall provide the following information:

1. Return, supply, outdoor and space air temperature

2. Duct and building static pressure- the control contractor is responsible for providing and installing sensing tubes

3. Supply and return fan status and airflow verification

4. Supply and return VFD speed

5. Outside air damper position and economizer mode

6. Cooling and heating and changeover status

7. Occupied, unoccupied, and dirty filter status

8. Date and time schedules

9. Up to 4 current alarms and 8 previous alarms with time and date

J. The keypad shall provide the following set points as a minimum:

1. Six control modes including off manual, auto, heat/cool, cool only, heat only and fan only

2. Four occupancy modes including auto, occu-pied, unoccupied and bypass (tenant override with adjustable duration).

3. Control changeover based on return air temper-ature, space temperature, network signal, out-door air temp (VAV with mod. heat).

4. Primary cooling and heating set point tempera-ture based on supply or space temperature

5. Night setback and setup space temp.

6. Cooling and heating control differential (or dead band).

7. Cooling and heating supply temperature reset options based on return air, outdoor air, or space air temperature Airflow (VAV,) network, or exter-nal (1-5 VDC) signal.

8. Reset schedule temperature.

9. High supply, low supply and high return air tem-perature alarm limits.

10.Ambient compressor and heat lockout temperatures.

11.Auto or manual lead lag method on compressors.

12.Compressor inter-stage timers duration.

13.Duct and building static pressure (opt.)

14.Duct static pressure reset based on network signal.

15.Return fan tracking (VaneTrol) settings that include minimum/maximum VFD speed with and without remote exhaust operation.

16.Minimum outdoor airflow reset based on Design-Flow direct OA volume measurement, external reset (1-5VDC,) percent of CFM capacity, and fixed outdoor damper position.

17.Economizer changeover based on enthalpy, dry bulb or network signal.

18.Current time and date.

19.Occupied/unoccupied time schedules with allowances for holiday/ event dates and duration

20.Three types of service modes including timers normal (all time delays,) timers fast (all time delays 20 seconds,) and normal

L. Open Communications Protocol - The unit control system shall have the ability to communicate to an independent Building Management System (BMS) through a direct [BACnet IP] [BACnet MSTP] [LonTalk] communication connection.

1. The independent BMS system shall have access to [quantity from specification] “read only” vari-ables and [quantity from specification] “read & and write” variables. Communications shall not require field mounting of any additional sensors or devices at the unit. The BMS system shall be capable of interacting with the individual rooftop controllers in the following ways:

• Monitor controller inputs, outputs, set points, parameters and alarms

• Set controller set points and parameters• Clear alarms• Reset the cooling and heating discharge air

temperature set point (VAV and CAV-DTC units)

• Reset the duct static pressure set point (VAV units)

• Set the heat/cool changeover temperature (VAV and CAV-DTC units)

• Set the representative zone temperature (CAV-ZTC units)

2. It will be the responsibility of the Systems Integrating Contractor to integrate the rooftop data into the BMS control logic and interface stations.

© 2003 McQuay International • www.mcquay.com • 800-432-1342

This document contains the most current product information as of this printing. For the most up-to-dateproduct information, please go to www.mcquay.com.

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