QTEC SERIES PACKAGED HEAT PUMP INSTALLATION …

Manual 2100-420F of 32

Models:QH243 QH302QH362 QH422QH482 QH602

QTEC SERIESPACKAGED HEAT PUMP

INSTALLATIONINSTRUCTIONS

Bard Manufacturing CompanyBryan, Ohio 43506

Since 1914 . . . Moving ahead, just as planned.

Manual: 2100-420FSupersedes: 2100-420EFile: Vol II Tab 14Date: 02-10-06

© Copyright 2004

MIS-1554


CONTENTS

Getting Other Information and PublicationsFor more information, contact these publishers: .......... 3

QTEC General InformationQTEC Model Nomenclature .......................................... 4Shipping Damage ......................................................... 8Unit Removal From Skid .............................................. 8Handling Unit After Removal From Skid....................... 9General ......................................................................... 9Minimum Installation Height ......................................... 9Duct Work .................................................................. 11Filters .......................................................................... 11Fresh Air Intake .......................................................... 12Condensate Drain ...................................................... 12Service Light ............................................................... 13

Installation InstructionsMounting the Unit ....................................................... 14Wiring — Main Power ................................................. 15Wiring — Low Voltage Wiring..................................... 15Low Voltage Connections ........................................... 16

Start UpDescription of Standard Equipment ............................... 21Optional CFM (QH361QH421and QH481 Only) ............ 21Important Installer Note.................................................. 21Phase Monitor ................................................................ 21Three Phase Scroll Compressor Start Up Information ................................................................ 21Service Hints .................................................................. 22Mist Eliminator Service .................................................. 22Vent Options .................................................................. 23Sequence of Operation .................................................. 26Optional Climate Controls Sequence of Operation .............................................................. 26Pressure Service Ports .................................................. 26Defrost Cycle ................................................................. 27

TroubleshootingSolid State Heat Pump Control TroubleshootingProcedure ...................................................................... 29Checking Temperature Sensor ...................................... 29Fan Blade Setting Dimensions ...................................... 30Refrigerant Charge ........................................................ 30Pressure Charts ...................................................... 31 - 32

Figures

Figure 1 Unit Dimensions .......................................... 7Figure 2 Air Seal on Bottom of Unit ........................... 8Figure 3 Removal of Unit From Skid ......................... 8Figure 4 Unit on Appliance Cart for Moving ............... 9Figure 5 Installation With Free Blow Plenum .......... 10Figure 6 Ducted Application ..................................... 10Figure 7 Supply Duct Connections .......................... 11Figure 8 Filter Location ............................................ 11Figure 9 Side Drain .................................................. 12Figure 10 Optional Rear Drain ................................... 12Figure 11 Rear Drain (Top View) ............................... 13Figure 12 Unit Mounting ............................................ 13Figure 13 Screws in Wheels of Unit .......................... 14Figure 14 Component Location ................................. 15Figure 15 Thermostat Plug Terminals ........................ 17Figure 16 Thermostat Wiring Diagram "X" Option .... 18Figure 17 Thermostat Wiring Diagram "A" Option .... 19Figure 18 Thermostat Wiring Diagram "D" Option ... 20Figure 19 Fresh Air Damper Removal ....................... 24Figure 20 QERV Removal ......................................... 25Figure 21 Heat Pump Control Board ......................... 26Figure 22 Low Pressue Control Bypass Timer .......... 27Figure 23 Fan Blade Setting ...................................... 30

Tables

Table 1 Factory Built-In Electric Heat Table .............. 4Table 2 Electrical Specifications ................................ 5Table 2A Electrical Specifications ................................ 6Table 3 Operating Voltage Range ........................... 15Table 4 Wall Thermostats and Subbase

Combinations .............................................. 17Table 5 Troubleshooting .......................................... 28Table 6 Temperature vs Resistance of

Temperature Sensor ................................... 29Table 7 Fan Blade Dimensions ............................... 30Table 8 Super Heat at Compressor ......................... 30Table 9 Indoor Blower Performance ........................ 30Table 10 Cooling Pressure ........................................ 31Table 11 Heating Pressure ........................................ 32


GETTING OTHER INFORMATION AND PUBLICATIONS

These publications can help you install the airconditioner or heat pump. You can usually find these atyour local library or purchase them directly from thepublisher. Be sure to consult current edition of eachstandard.

National Electrical Code ..................... ANSI/NFPA 70

Standard for the Installation ............. ANSI/NFPA 90Aof Air Conditioning andVentilating Systems

Standard for Warm Air ......................ANSI/NFPA 90BHeating and AirConditioning Systems

Load Calculation for ....................... ACCA Manual J orWinter and Summer Manual NAir Conditioning

Low Pressure, Low Velocity ........ ACCA Manual D orDuct System Design Manual QWinter and SummerAir Conditioning

FOR MORE INFORMATION, CONTACTTHESE PUBLISHERS:

ACCA Air Conditioning Contractors of America1712 New Hampshire AvenueWashington, DC 20009Telephone: (202) 483-9370Fax: (202) 234-4721

ANSI American National Standards Institute11 West Street, 13th FloorNew York, NY 10036Telephone: (212) 642-4900Fax: (212) 302-1286

ASHRAE American Society of Heating, Refrigeration,and Air Conditioning Engineers, Inc.1791 Tullie Circle, N.E.Atlanta, GA 30329-2305Telephone: (404) 636-8400Fax: (404) 321-5478

NFPA National Fire Protection AssociationBatterymarch ParkP.O. Box 9101Quincy, MA 02269-9901Telephone: (800) 344-3555Fax: (617) 984-7057


TABLE 1FACTORY BUILT-IN ELECTRIC HEAT TABLE

sledoMA-342HQA-203HQ B-342HQ B-203HQ C-342HQ C-203HQ

A-263HQA-224HQA-284HQA-206HQ

B-263HQB-224HQB-284HQB-206HQ

C-263HQC-224HQC-284HQC-206HQ

1-V042 1-V802 1-V042 1-V802 1-V042 1-V802 3-V084 3-V084 1-V042 1-V802 1-V042 1-V802 3-V084

WK HUTB HUTB HUTB HUTB HUTB HUTB HUTB HUTB HUTB HUTB HUTB HUTB HUTB

0.5 083,61 092,21 083,61 092,21

0.6 005,02 063,51 005,02 063,51 005,02 005,02 005,02 063,51 005,02

0.9 007,03 000,32 007,03 000,32 007,03 007,03 007,03 000,32 007,03

0.01 076,23 075,42 076,23 075,42

0.21 000,14 007,03 000,14

0.51 051,94 068,63 051,94 068,63 051,94

QTEC Series General Information

QTEC MODEL NOMENCLATURE

QH 36 2 – A 10 X X X X X X

SPECIAL UNITS |L - Low Ampacity Circuit

REVISION |

VOLTS & PHASE |A - 230/208/60/1B - 230/208/60/3C - 460/60/3

INTERNAL CONTROLSX - Standard

• High Pressure Switch• Low Pressure Switch• Compressor Time Delay

E - Low Ambient ControlQ - Outdoor ThermostatR - Low Ambient Control &

Outdoor Thermostat

COIL OPTIONSX - Standard

CLIMATE CONTROL OPTIONSX - NoneA - Electronic/Non Prog/Man C/OD - Electronic/Prog/Man/Auto

MODEL NUMBER |QH - QTEC Model

CAPACITY |24 - 2 Ton30 - 2½ Ton36 - 3 Ton42 - 3½ Ton48 - 4 Ton60 - 5 Ton

KW0Z - 0KW05 - 5KW06 - 6KW09 - 9KW10 - 10KW12 - 12KW15 - 15KW

VENTILATION OPTIONSX - Barometric Fresh Air Damper (Standard)B - Blank-off PlateV - Commercial Ventilator - Motorized w/Exhaust

Spring ReturnP - Commercial Ventilator - Motorized w/Exhaust

Power ReturnR - Energy Recovery Ventilator w/Exhaust

FILTER OPTIONSX - 1 Inch Fiberglass

(Standard)F - 2 Inch FiberglassP - 2 Inch Pleated

COLOR OPTIONSV - Platinum w/Slate

Front (Vinyl)4 - Gray paint


ELECTRICAL SPECIFICATIONS CONTINUED ON PAGE 6 TABLE 2A

1Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors.2Based on 75°C copper wire. All wiring must conform to the National Electrical Code and all local codes.3 These “Minimum Circuit Ampacity” values are to be used for sizing the field power conductors. Refer to the National Electric

Code (latest revision), article 310 for power conductor sizing.CAUTION: When more than one field power conductor circuit is run through one conduit, the conductors must be derated. Pay

special attention to Note 8 of Table 310 regarding Ampacity Adjustment Factors when more than three conductorsare in a raceway.

4Maximum KW that can operate with heat pump on is 10KW. Other 5KW energizes during emergency heating only.5Maximum KW that can operate with heat pump on is 9KW. Other 6KW energizes during emergency heating only.

TABLE 2ELECTRICAL SPECIFICATIONS

SLEDOM

DETAR&STLOVSESAHP

TIUCRICELGNIS TIUCRICLAUD

.ONDLEIFREWOP

STIUCRIC

3

MUMINIMTIUCRICYTICAPMA

1

MUMIXAMLANRETXE

ROESUFTIUCRICREKAERB

2

DLEIFREWOP

ERIWEZIS

2

DNUORGERIWEZIS

3


1MUMIXAMLANRETXE


2

DLEIFREWOP

EZISERIW

2

DNUORGEZISERIW

TKCA

TKCB

TKCA

TKCB

TKCA

TKCB

TKCA

TKCB

Z0A-342HQ50A-01A-

1-802/03211

2RO1

227427

030508

0184

0101

8

----22

----05

----03

----05

----01

----

8

----01

----01

Z0B-342HQ60B-90B-

3-802/032111

715344

025354

2188

210101

------

------

------

------

------

------

------

------

Z0C-342HQ60C-90C-

3-064111

87122

510252

412101

412101

------

------

------

------

------

------

------

------

Z0A-203HQ50A-01A-

1-802/03211

2RO1

429447

530508

884

0101

8

----42

----05

----03

----05

----01

----

8

----01

----01

Z0B-203HQ60B-90B-21B-

3-802/032

1111

81635445

52045406

01866

01010101

--------

--------

--------

--------

--------

--------

--------

--------

Z0C-203HQ60C-90C-21C-

3-064

1111

9813272

51025203

412101

8

41210101

--------

--------

--------

--------

--------

--------

--------

--------

Z0A-263HQ50A-01A-

4 - 51A

3-802/032

11

2RO12RO1

92459728

54060909

8644

0101

88

----9223

----0505

----0404

----0505

----

88

----

88

----0101

----0101

Z0B-263HQ60B-90B-

5 - 51B

3-802/032

1111

32140525

03540506

01886

01010101

--------

--------

--------

--------

--------

--------

--------

--------

Z0C-263HQ60C-90C-

5 - 51C

3-064

1111

11024262

51020303

41010101

41010101

--------

--------

--------

--------

--------

--------

--------

--------


TABLE 2AELECTRICAL SPECIFICATIONS

(Continued)

LEDOM

DETAR&STLOV

ESAHP

TIUCRICELGNIS TIUCRICLAUD

.ONDLEIFREWOP

STIUCRIC

3


1

MUMIXAMLANRETXE


2

DLEIFREWOP

ERIWEZIS

2

DNUORGERIWEZIS

3


1MUMIXAMLANRETXE


2

DLEIFREWOP

EZISERIW

2

DNUORGEZISERIW

TKCA

TKCB

TKCA

TKCB

TKCA

TKCB

TKCA

TKCB

Z0A-224HQ50A-01A-

4 - 51A

1-802/032

11

2RO12RO1

33853838

05060909

8644

0101

88

----3333

----0505

----0404

----0505

----

88

----

88

----0101

----0101

Z0B-224HQ60B-90B-

5 - 51B

3-802/032

1111

42342525

03540506

01866

01010101

--------

--------

--------

--------

--------

--------

--------

--------

Z0C-224HQ60C-90C-

5 - 51C

3-064

1111

61520303

02520303

21010101

21010101

--------

--------

--------

--------

--------

--------

--------

--------

Z0A-284HQ50A-01A-

4 - 51A

1-802/032

11

2RO12RO1

63166868

0607001001

8633

01866

--636363

--520505

--060606

--520505

--888

--01

88

--010101

--010101

Z0B-284HQ60B-90B-

5 - 51B

3-802/032

1111

62443535

04050606

8866

01010101

--------

--------

--------

--------

--------

--------

--------

--------

Z0C-284HQ60C-90C-

5 - 51C

3-064

1111

41327272

51520303

41010101

41010101

--------

--------

--------

--------

--------

--------

--------

--------

Z0A-206HQ50A-01A-

4 51A-

1-802/032

12ro12ro12ro1

54075959

0609011011

8622

01866

--545454

--520505

--060606

--520505

--888

--01

88

--010101

--010101

Z0B-206HQ90B-

5 51B-3-802/032

111

340606

540707

866

010101

------

------

------

------

------

------

------

------

Z0C-206HQ90C-

5 51C-3-064

111

710303

525353

0188

010101

------

------

------

------

------

------

------

------

1Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors.2 Based on 75°C copper wire. All wiring must conform to the National Electrical Code and all local codes.3 These “Minimum Circuit Ampacity” values are to be used for sizing the field power conductors. Refer to the National Electric

Code (latest revision), article 310 for power conductor sizing.CAUTION: When more than one field power conductor circuit is run through one conduit, the conductors must be derated. Pay

special attention to Note 8 of Table 310 regarding Ampacity Adjustment Factors when more than three conductorsare in a raceway.

4Maximum KW that can operate with heat pump on is 10KW. Other 5KW energizes during emergency heating only.5Maximum KW that can operate with heat pump on is 9KW. Other 6KW energizes during emergency heating only.


FIG

UR

E 1

UN

IT D

IMEN

SIO

NS


SHIPPING DAMAGEUpon receipt of equipment, the carton should bechecked for external signs of shipping damage. Theskid must remain attached to the unit until the unit isready for installation. If damage is found, the receivingparty must contact the last carrier immediately,preferably in writing, requesting inspection by thecarrier’s agent.

UNIT REMOVAL FROM SKID

FIGURE 3REMOVAL OF UNIT FROM SKID

A Shipping Brackets B Front Wheels Over Edge C Front Wheels On Floor

Hold Skid Down

It is recommended that the unit not be removed from theskid with a fork lift since the air seal under the unitcould be damaged. See Figure 2.

The shipping brackets on each side of the unit must beremoved and discarded. See Figure 3-A. The return airgrille panel can be removed to provide a place to hold

the unit. The unit can be slid forward on the skit untilthe front wheels hang over the edge of the skid. SeeFigure 3-B. The unit can be tipped forward and sliddown the edge of the skid until the front wheels touchthe ground. See Figure 3-C. The wheels will not roll.They are shipped from the factory locked so they willnot roll. The back of the skid will have to be held downto keep it from tipping up. The skid can be slid out fromunder the unit. The unit can then be set upright.

WARNINGThis unit is heavy and requires more than oneperson to handle and remove from the skid.Check unit wheels to ensure that wheels arelocked before removing from skid. Extremecaution must be taken to prevent injury topersonnel and damage to the unit.

MIS-1007

FIGURE 2AIR SEAL UNDER QTEC UNIT

MIS-1008Air Seal


HANDLING UNIT AFTER REMOVALFROM SKID

The unit will have to be turned sideways and removedfrom the skid to fit through a 36" doorway. If the doorheight allows, the unit can be slid sideways through thedoor.

If the unit can not be slid through the door, then the unitwill have to be put on a cart and tipped down to rollthrough the door. It is recommended that an appliancecart by used with a strap to hold the unit on the cart.

The wheels of the unit must be locked. If the wheelswere allowed to roll, the unit could roll off the cart. Theunit should always be carted from the left side. This isthe side where the compressor is located. See Figure 4.The blade of the appliance cart should be slid under thewheels of the unit. The strap of the appliance cartshould be placed around the unit and strapped tightly.Help will be required to tip the unit back onto the cart.The unit can be leaned far enough back to be rolledthrough the door. Be careful when setting the unit backup to keep from damaging the unit.

GENERALThe equipment covered in this manual is to be installedby trained, experienced service and installationtechnicians.

The unit is designed for use with or without duct work.For use without duct work, Plenum Box QPB42 isrecommended.

These instructions explain the recommended method toinstall the air cooled self-contained unit and theelectrical wiring connections to the unit.

These instructions and any instructions packaged withany separate equipment required to make up the entireair conditioning system should be carefully read beforebeginning the installation. Note particularly “StartProcedure” and any tags and/or labels attached to theequipment.

While these instructions are intended as a generalrecommended guide, they do not supersede any nationaland/or local codes in any way. Authorities havingjurisdiction should be consulted before the installation ismade. See Page 3 for information on codes andstandards.

Size of unit for a proposed installation should be basedon heat loss calculation made according to methods ofAir Conditioning Contractors of America (ACCA). Theair duct should be installed in accordance with theStandards of the National Fire Protection Systems ofOther Than Residence Type, NFPA No. 90A, andResidence Type Warm Air Heating and AirConditioning Systems, NFPA No. 90B. Where localregulations are at a variance with instructions, installershould adhere to local codes.

MINIMUM INSTALLATION HEIGHT

The minimum installation height of the unit with a FreeBlow Plenum is 8 ft. 6 in. This provides enoughclearance for the plenum to be removed. See Figure 5.

The minimum installation height for ducted applicationsis 8 ft. 4½ in. This provides enough clearance to installthe duct work. See Figure 6.

FIGURE 4UNIT ON APPLIANCE CART

WARNINGExercise extreme caution when pushing theunit on the rollers. Handle and push from thelower 1/3 of the unit. Insure that debris is noton the floor where the unit is to be moved onthe rollers. Failure to do so could result in theunit tipping over and causing bodily injury and/or damage to the unit.

QTEC UNIT(Right Side)

APPLIANCECART

COMPRESSOR

MIS-1555

STRAP


FIGURE 6DUCTED APPLICATION

FIGURE 5INSTALLATION WITH FREE BLOW PLENUM

MIS-1573

SUSPENDEDCEILING FIXED CEILING DUCT

DUCT FLANGE

8 FT. - 7 IN.MINIMUM RECOMMENDED

CEILING HEIGHT7 FT. - 4 IN.UNIT HEIGHT

12 IN.MINIMUM

2 IN. MINIMUMFROM DUCT FLANGE

TO DUCT BOTTOM

8 FT. - 4.5 IN.MINIMUM REQUIRED

INSTALLATION HEIGHT

FLOOR

20 IN.MINIMUM

MIS-1574

CEILING

8 FT. - 6 IN.MINIMUM RECOMMENDED

CEILING HEIGHT8 FT. - 5 IN.

FLOOR


DUCT WORKAny heat pump is more critical of proper operatingcharge and an adequate duct system than a straight airconditioning unit. All duct work must be properly sizedfor the design air flow requirement of the equipment.Air Conditioning Contractors of America (ACCA) is anexcellent guide to proper sizing. All duct work orportions thereof not in the conditioned space should beproperly insulated in order to both conserve energy andprevent condensation or moisture damage. When ductruns through unheated spaces, it should be insulatedwith a minimum of one inch of insulation. Useinsulation with a vapor barrier on the outside of theinsulation. Flexible joints should be used to connect theduct work to the equipment in order to keep the noisetransmission to a minimum.

The QTEC series heat pump has provision to attach asupply air duct to the top of the unit. Duct connectionsize is 12 inches x 20 inches. The duct work is fieldsupplied and must be attached in a manner to allow forease of removal when it becomes necessary to slide theunit out from the wall for service. See Figure 7 forsuggested attachment method.

NOTE: Unit cabinet, supply air duct and free blowplenum are approved for “0” clearance tocombustible material.

The QTEC series heat pumps are designed for use withfree return (non-ducted) and either free blow with theuse of QPB Plenum Box or a duct supply air system.

The QPB and QPBHW Plenum Box mounts on top ofthe unit and has both vertically and horizontallyadjustable louvers on the front discharge grille.

For hot water coil option a QPBHWxx-F for free blowor QPBHWxx-D for ducted airflow is used

When used with a ducted supply, a QCX CabinetExtension can be used to conceal the duct work abovethe unit to the ceiling. This extends 20" above the unitfor a total height above the floor of 10'-7/8". The unit isequipped with a variable speed indoor blower motorwhich increases in speed with an increase in duct staticpressure. The unit will therefore deliver proper rated airflow up to the maximum ESP shown in Table 8.However, for quiet operation of the air system, the ductstatic should be kept as low as practical, within theguidelines of good duct design.

FILTERSTwo 1-inch throw away filters [(1) 16x16 and (1)16x20] are supplied with each unit. The filters slide intofilter brackets. Refer to Figure 8.

The filters are serviced from the inside of the buildingby opening the hinged door. This door is attached by1/4 turn fasteners and one locking latch.

The internal filter brackets are adjustable toaccommodate 2-inch filters. The tabs for the 1-inchfilters must be bent down to allow the 2-inch filters toslide in place.

FIGURE 7SUPPLY DUCT CONNECTIONS

SUPPLY DUCTTO BE FIELDSUPPLIED

ATTACHMENTSCREWS TOBE FIELDSUPPLIED

ROOM SIDE OFQTEC UNIT

DUCT FLANGEPROVIDED WITHUNIT

MIS-978

FIGURE 8FILTER LOCATION

MIS-1575

FILTERS

RETURN AIRGRILLE


FRESH AIR INTAKEThis unit is equipped with a fresh air damper assembly.The damper blade is locked in the closed position whenthe unit is shipped from the Factory. To allow thedamper to operate remove the two plastic locking pins,one on each end of the blade. This will allow formaximum fresh air flow. The damper blade will nowopen when the indoor blower is operating. If less thanmaximum fresh air flow is required, reinsert the plasticpins to limit damper blade opening to desired level.Two extra pins are provided (taped to the inside of theassembly) which may be used to hold the blade in someposition other than minimum or maximum position.This fresh air assembly is located in the rear of the unitand to gain access to make these adjustments removethe air filter service door.

All capacity, efficiency and cost of operationinformation as required for Department of Energy“Energyguide” Fact Sheets are based upon the fresh airblank-off plate in place and is recommended formaximum energy efficiency.

The blank-off plate is available upon request from thefactory and is installed in place of the fresh air dampershipped with each unit.

For details on energy recovery ventilation see separatesection.

CONDENSATE DRAIN

There are two drain connections on the unit. The reardrain is the primary drain, and is located on the rightlower rear panel of the unit. The optional side drain islocated on the bottom right side of the unit. The sidedrain is shipped with a plug installed.

The side drain requires a water trap for proper drainage.See Figure 9. The drain can be routed through the flooror through the wall. If the drain is to be routedthrough an unconditioned space, it must be protectedfrom freezing. The drain line must be able to beremoved from the unit if it is necessary to remove theunit from the wall. When the side drain is used, the plugmust be removed and installed in the rear drain outlet.

The rear drain can be used with wall thickness of up to10 inches where a water trap can be installed betweenthe unit and the interior wall. See Figure 10. The trapcannot extend beyond the edge of the unit or it willinterfere with the wall mounting bracket. The drain canbe routed through the floor or through the wall. If thedrain is routed through the wall, the drain line must bepositioned such that it will not interfere with the sleeveflange or the grille. See Figure 11. If the drain is to berouted through an unconditioned space, it must beprotected from freezing.

Optional rear drain kits, both standard and heatedversions, are available to facilitate easy installation, andalso removability of heat pump for service.

FIGURE 10STANDARD REAR DRAIN

FIGURE 9OPTIONAL SIDE DRAIN (SIDE VIEW)

INSTALLATION

QTEC UNIT


MIS-1061

SERVICE LIGHTThe unit is equipped with a service light whichsignals the user that service is required. The lightis located in the upper control panel and is visibleonly when the hinged service/filter access door isopen.

The Service Unit light indicates that the unit hasbeen shut off by a high or low pressure device.This indicates that the unit needs to be serviced.

FIGURE 12UNIT MOUNTING

BOTTOMTRIM PIECE

BOTTOM TRIMEXTENSION

MOUNTINGBRACKET

SIDE TRIM(2 PCS.)

SIDE TRIM(2 PCS.)

MIS-1576

CABINETSIDE PANEL

ENLARGED VIEW OF MOUNTINGBRACKET SHOWING SLEEVE TO

CABINET ATTACHMENT

MOUNTING BRACKET

#8 SCREWPROVIDED

(LIGHT COLOR)

WALLSLEEVE

#10 HEXHEAD SCREW

PROVIDED

MIS-977

WATER TRAP

FIGURE 11REAR DRAIN (TOP VIEW)

WALL (MAXIMUM 10”FOR REAR DRAIN)

COUPLINGS NOTSHOWN BUTRECOMMENDEDFOR EASE OFREMOVABILITYFOR SERVICE.

SLEEVE

DRAIN LINE

WALL BRACKET

UNIT


INSTALLATION INSTRUCTIONS

MOUNTING THE UNITWhen installing a QTEC unit near an interior wall on theleft side, a minimum of 8 inches is required; 12 inches ispreferred.

When installing a QTEC unit near an interior wall on theright side, a minimum of 18 inches is required asadditional space is required to connect the side drain. Ifthe rear condensate drain kit QCDS48 is used theminimum can be reduced to 8 inches.

This clearance is required to allow for the attachment ofthe unit to the sleeve and side trim pieces to the wall.

This unit is to be secured to the wall sleeve withmounting brackets provided. The unit itself, the supplyduct and the free blow plenum are suitable of “0”clearance to combustible material.

Following are the steps for mounting the QTEC, forreference see Figure 12 (page 13).

1. Attach mounting brackets to the wall sleeve withscrews provided.

2. Position the unit in front of the sleeve with thecondenser section toward the sleeve.

3. Remove the locking screws from the wheels.Refer to Figure 13.

4. Roll the unit into the sleeve. Make sure to checkboth sides of the unit as it is being rolled to keepit centered in the sleeve. Also check the

alignment to the mounting brackets. This unitmust be level from side to side. If adjustmentsare necessary, shim up under the rollers withsheets of steel or any substance that is notaffected by moisture.

5. Make sure the gasket on the rear of the unit istouching the sleeve across the top and down bothsides. This is a rain water seal.

6. Secure the mounting brackets to the unit withscrews provided, #10 hex head sheet metalscrews.

7. Bottom trim extensions are provided for use whenwall is less than 14 inches but greater than 10.5inches. Secure to wall with screws (notprovided).

8. Attach the bottom trim piece to the unit with thescrews provided (dark colored).

9. Position side trim pieces to wall and attach withfield supplied screws. There are two long piecesand two short pieces supplied. The long piecesare to enclose the gap behind the unit. The shortpieces are to fill the gap behind the cabinetextension or the free blow plenum box. The maybe cut to suit your ceiling height or overlap theunit side trim. There is sufficient length to trip upto a 10'2" ceiling.

NOTE: If the exterior wall thickness is between 5inches to 10.5 inches, a side trim extension

piece kit, model QSTX42, is available.

MIS-1018

REMOVE SCREWSFROM WHEELSBEFORE ROLLINGINTO PLACE

FIGURE 13REMOVING LOCKING SCREWS FROM WHEELS


The standard Climate Control Option X is a remotethermostat connection terminal block. See Figure 16 forwiring diagram. Compatible thermostats are listed inTable 4.

The Climate Control Option A is an electronic, non-programmable manual or auto changeover thermostat.The subbase of the thermostat is factory wired to thefront panel of the unit. See Figure 17 for wiringdiagram. Compatible for use with Bard CS2000AController and Energy Recovery Ventilator.

The Climate Control Option D is an electronic,programmable thermostat. The subbase of thethermostat is factory wired to the front panel of the unit.See Figure 18 for wiring diagram. Compatible for usewith Energy Recovery Ventilator or Economizer.

NOTE: On option X or A the CS2000A (or other fieldprovided means to control ventilation) must beused if any of the motorized ventilation optionsare installed.

WIRING – MAIN POWERRefer to the unit rating plate and/or Table 2 for wiresizing information and maximum fuse or “HACR Type”circuit breaker size. Each unit is marked with a“Minimum Circuit Ampacity”. This means that thefield wiring used must be sized to carry that amount ofcurrent. Depending on the installed KW of electricheat, there may be two field power circuits required. Ifthis is the case, the unit serial plate will so indicate. Allmodels are suitable only for connection with copperwire. Each unit and/or wiring diagram will be marked“Use Copper Conductors Only”. These instructionsMUST BE adhered to. Refer to the National ElectricalCode (NEC) for complete current carrying capacity dataon the various insulation grades of wiring material. Allwiring must conform to NEC and all local codes.

The electrical data lists fuse and wire sizes (75°Ccopper) for all models, including the most commonlyused heater sizes. Also shown are the number of fieldpower circuits required for the various models withheaters.

The unit rating plate lists a “Maximum Time DelayRelay Fuse” or “HACR Type” circuit breaker that is tobe used with the equipment. The correct size must beused for proper circuit protection, and also to assure that

DEHUMIDIFICATIONCONTROL(OPTIONAL)

MIS-1577

UNITMOUNTEDTHERMOSTATLOCATION

ELECTRICHEATERS

CIRCUITBREAKER PANEL& CONTROLS

INDOORBLOWER

REMOTETHERMOSTATTERMINALBLOCK

SIDE FIELD WIREENTRANCE

LOWERCONTROLPANEL

FIGURE 14COMPONENT LOCATION

TABLE 3OPERATING VOLTAGE RANGE

NOTE: The voltage should be measured at the filedpower connection point in the unit and whilethe unit is operating at full load (maximumamperage operating condition).

PAT EGNAR

V042 612–352

V802 781–022

there will be no nuisance tripping due to the momentaryhigh starting current of the compressor motor.

The disconnect access door on this unit may be lockedto prevent unauthorized access to the disconnect.

See Start Up section for information on three phasescroll compressor start-ups.The field wiring connections are located behind the topand hinged panel in the circuit breaker panel. SeeFigure 14.

WIRING – LOW VOLTAGE WIRING230/208V, 1 PHASE AND 3 PHASE EQUIPMENTDUAL PRIMARY VOLTAGE TRANSFORMERS.All Equipment leaves the factory wired on 240V tap.For 208V operation, reconnect form 240V to 208V tap.The acceptable operating voltage range for the 240 and208V taps are as noted in Table 3.


LOW VOLTAGE CONNECTIONSThese units use a grounded 24 volt AC low voltagecircuit.

The “R” terminal is the hot terminal and the “C”terminal is grounded.

“G” terminal or pins 6 and 1 of P2 are the fan inputs.Both must be energized for proper fan operation. Thisis done automatically in the factory installed climatecontrol options. If the climate control option isabandoned and connections are made directly to P2 bothpins 6 and 1 of P2 must be energized for properoperation.

“Y” terminal or pin 7 of P2 is the compressor input.

“B” terminal or pin 8 of P2 is the reversing valve input.The reversing valve must be energized for heatingmode.

“R” terminal or pin 10 of P2 is 24 VAC hot.

“C” terminal or pin 11 of P2 is 24 VAC grounded.

“L” terminal or pin 12 of P2 is compressor lockout output. This terminal is activated on a high or lowpressure trip by the electronic heat pump control. Thisis a 24 VAC output.

“W2” terminal or pin 9 of P2 is second stage heat (ifequipped). If the unit is equipped with an optional hotwater coil plenum box or electric heat these will beenergized by this terminal.

“O1” terminal of pin 5 of P2 is the ventilation input.This terminal energizes any factory installed ventilationoption.

“E” terminal or pin 3 of P2 is the emergency heat input.This terminal energizes the emergency heat relay.

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GENERALThis unit is equipped with a variable speed ECM motor.The motor is designed to maintain rated airflow up tothe maximum static allowed. It is important that theblower motor plugs are not plugged in or unpluggedwhile the power is on. Failure to remove power priorto unplugging or plugging in the motor could result inmotor failure.

CAUTIONDo not plug in or unplug blower motorconnectors while the power is on. Failure to doso may result in motor failure.

NOTE: For total and proper control using DDC, atotal of 6 controlled outputs are required (5 ifno ventilation system is installed). For propersystem operation under Emergency Heatconditions. Where the compressor needs to bedeactivated, the B-W2-E outputs need to beenergized. Removing the Y (compressor)signal alone turns the compressor off, but doesnot activate the additional circuitry embeddedin the heat pump for proper and completeoperation.


MIS-1285

THERMOSTAT PLUG TERMINALSP2 AND P4

(VIEWED FROM PIN END)

BLOWER MOTORLOW VOLTAGE PLUG

(VIEWED FROM PIN END)

FIGURE 15

TABLE 4WALL THERMOSTATS AND SUBBASE COMBINATIONS

tatsomrehT esabbuS serutaeFtnanimoderP

710-7048)9211R478T(

900-4048)1811L476Q(

looCrotaeHotuAoN

810-3048)4202N478T(

010-4048)1621476Q(

looC/taeHcitamotuAnoitisoPrevoegnahC

940-3048)083-39F1( A/N looC/taeH/otuA/launaM

elbammargorP

240-3048)0701G1158T( A/N looC/taeH/otuA/launaM

cinortcelEelbammargorP-noN


FIGURE 16REMOTE THERMOSTAT WIRING DIAGRAM

“X” THERMOSTAT OPTION

NOTE: On option X or A the CS2000A (or other fieldprovided means to control ventilation) must beused if any of the motorized ventilation optionsare installed.

24VAC HOT

COMPRESSOR

REVERSING VALVE

2ND STAGE HEAT

BLOWER

EMERGENCY HEAT

24VAC COMMON

VENTILATOR OR DAMPER


FIGURE 17UNIT MOUNTED THERMOSTAT WIRING DIAGRAM

“A” THERMOSTAT OPTION

4102-021A

NOTE: On option X or A the CS2000A (or other fieldprovided means to control ventilation) must be usedif any of the motorized ventilation options areinstalled.


FIGURE 18UNIT MOUNTED THERMOSTAT WIRING DIAGRAM

“D” THERMOSTAT OPTION

4102-022C


START UP

DESCRIPTION OF STANDARDEQUIPMENTSolid State Electronic Heat Pump ControlProvides efficient 30 minute defrost cycle. A thermistorsensor and speed up terminal for service along with a 10minute defrost override are standard on the electronicheat pump control.

High / Low Pressure SwitchProvides refrigerant circuit high pressure and loss ofcharge protection. Includes lockout circuit that isresettable from room thermostat.

Five Minute Compressor Time DelayProvides short cycle protection for the compressorwhich extends compressor life. Built into the electronicheat pump control as standard.

Service LightsOne service light indicates when service is required.

• Check System – detects high or low pressureswitch operation for compressor protection.

OPTIONAL CFM (QH362, QH422, QH482AND QH602 ONLY)These units are shipped from the factory set to operate atthe optional CFM level shown in Table 9. This provideslower operating sound levels for non-ducted, freedischarge applications. This CFM level will reduce thesystem capacity performance by approximately 2% atthe same energy efficiency.

Rated CFM is required for ducted applications formaximum performance rating. To obtain full CFM onthese models, connect jumper wire as follows:

1. Disconnect all power to the unit. Failure to do somay result in damage to the motor.

2. Open return air service panel

3. Open inner control panel cover

4. Locate low voltage terminal strip. There is a pinkjumper wire with both ends attached to terminalmarked “G2”. Move one end of this jumper toterminal “Y”.

5. Reverse steps to reassemble.

IMPORTANT INSTALLER NOTEFor improved start-up performance, wash the indoor coilwith a dishwasher detergent.

PHASE MONITORAll units with three phase scroll compressors areequipped with a 3 phase line monitor to preventcompressor damage due to phase reversal.

The phase monitor in this unit is equipped with twoLEDs. If the Y signal is present at the phase monitorand phases are correct the green LED will light and thecompressor contactor is allowed to energize.

If phases are reversed, the red fault LED will be lit andcompressor operation is inhibited.

If a fault condition occurs, reverse two of the supplyleads to the unit. Do not reverse any of the unit factorywires as damage may occur.

THREE PHASE SCROLL COMPRESSORSTART UP INFORMATIONScroll compressors, like several other types ofcompressors, will only compress in one rotationaldirection. Direction of rotation is not an issue withsingle phase compressors since they will always startand run in the proper direction.

However, three phase compressors will rotate in eitherdirection depending upon phasing of the power. Sincethere is a 50-50 chance of connecting power in such away as to cause rotation in the reverse direction,verification of proper rotation must be made.Verification of proper rotation direction is made byobserving that suction pressure drops and dischargepressure rises when the compressor is energized.Reverse rotation also results in an elevated sound levelover that with correct rotation, as well as, substantiallyreduced current draw compared to tabulated values.

Verification of proper rotation must be made at thetime the equipment is put into service. If improperrotation is corrected at this time there will be nonegative impact on the durability of the compressor.However, reverse operation for oven one hour mayhave a negative impact on the bearing due to oil pumpout.

All three phase scroll compressors used in the QTEC

series are wired identically internally. As a result, oncethe correct phasing is determined for a specific systemor installation, connecting properly phased power leadsto the same Fusite terminal should maintain properrotation direction. The direction of rotation of the motormay be changed by reversing any two line connectionsto the unit.


SERVICE HINTS1. Caution user to maintain clean air filters at all

times. Also, not to needlessly close off supply airregisters. This may reduce air flow through thesystem, which shortens equipment service life aswell as increasing operating costs and noiselevels.

2. Switching to heating cycle at 75°F or higheroutside temperature may cause a nuisance trip ofthe remote reset high pressure switch. Turnthermostat off, then on to reset the high pressureswitch.

3. The heat pump wall thermostats perform multiplefunctions. Be sure that all function switches arecorrectly set for the desired operating modebefore trying to diagnose any reported serviceproblems.

4. Check all power fuses or circuit breakers to besure they are the correct rating.

5. Periodic cleaning of the outdoor coil to permitfull and unrestricted airflow circulation isessential.

6. Some service requires the need to remove the unitfrom the wall including replacement of the indoorcoil and/or the outdoor coil. Also, servicing theoutdoor fan motor or fan blade will requireremoving the unit from the wall if the unit isinstalled at a height that is not easily accessiblefrom the outside of the building.In order to remove the unit from the wall thefollowing procedure must be used:

a. Turn off power to the unit at the remotelocation. Some units may have more than onepower supply.

b. Disconnect field wiring at unit terminal blockand remove from unit.

c. Disconnect condensate drain.

d. Remove the lower skirting around the unit.

e. Remove wall mounting brackets from wall oneach side of the unit.

f. If unit is attached to duct work, remove uppercabinet extension by removing the top centerscrew only from the cabinet side panel.

g. Remove screws that attach the duct work tothe unit flanges.This unit is equipped with four rollersmounted to the base. For ease of pulling unitout from the wall, you may want to removethe bottom service door which requiresremoval of the return air panel, and grip thefront flange of the base pan then pull straightout.

7. Annual maintenance is required to make sure thatall of the systems are functioning properly.

a. Check to make sure that the drains are notobstructed in any way.

b. Remove any debris in the condenser section ofthe unit.

c. Inspect and clean mist eliminator as describedbelow.

d. Inspect and wash outdoor coil as necessary.

MIST ELIMINATOR SERVICEA mist eliminator is supplied with the wall sleeve. Themist eliminator is constructed of an aluminum frameand mesh. The mist eliminator is located in the topsection of the wall sleeve and can be removed from theinside of the building without removing the unit fromthe wall. This requires that the ventilation package mustbe removed.

It is recommended that the mist eliminator be inspectedannually and serviced as required. The mist eliminatorcan be inspected from the outside of the building bylooking through the outdoor grille. The mist eliminatorcan be serviced from the outside by using a vacuumcleaner. The outdoor grille must be removed. Use thevacuum to remove dirt and debris from the surface ofthe mist eliminator. If additional cleaning is required,the mist eliminator will have to be removed from thesleeve.

The ventilation package will have to be removed to gainaccess tot he mist eliminator. If the blank off plateoption is used, it is not necessary to service the misteliminator. The steps necessary to remove each of thevent options are listed on the following pages.

The mist eliminator can be cleaned by washing withsoap and water. The excess water should be shaken offthe mist eliminator before it is reinstalled.


QTEC R ENERGY RECOVERY VENTILATOR(Option)

Before starting, make sure that the power has beenturned off. The return air grille panel must be removed.The energy recovery ventilator (QERV) can be seenafter the panel has been removed. To gain access to themist eliminator, the QERV must be removed. SeeFigure 20.

1. The front fill plate of the QERV must be removed.There is one screw on either side of the plate.Remove these screws and remove the plate.

2. On either side of the QERV there are mountingscrews that hold the QERV in place. Remove both ofthese screws.

3. Underneath the heat recovery cassette there is apower connector for the lower blower assembly. Todisconnect this plug, the tabs on both sides of theplug must be squeezed to release the plug. Whilesqueezing the tabs, pull the plug out of the socket.

4. The QERV is plugged into the unit in the right sideof the unit. Both of these plugs must be disconnectedto remove the QERV. Squeeze the tabs on the sidesof the connector and pull straight out.

5. Slide the QERV assembly straight out of the unit,being careful not to let the cassette slide out of theQERV.

The mist eliminator can be seen through the opening inthe back of the unit. The mist eliminator must be raisedup and the bottom can be pulled toward the front of theunit and removed.

VENT OPTIONS

BAROMETRIC FRESH AIR DAMPER(Standard)

Before starting, make sure the power has been turnedoff. The return air grille panel must be removed. Thefresh air damper assembly can be seen on the back ofthe unit. See Figure 19.

1. The fresh air damper is attached to the back ofthe unit with one screw on either side of theassembly. Both of the screws must be removed.

2. Once the mounting screws are removed, tilt theassembly down and lift it out.

The mist eliminator can be seen through the opening.The mist eliminator must be raised up and the bottomcan be pulled toward the front of the unit.

COMMERCIAL ROOM VENTILATOR (Option)

Before starting, make sure the power has been turnedoff. The return air grille panel must be removed. Thecommercial room ventilator (CRV) can be seen afterthe panel has been removed. The CRV must beremoved to gain access to the mist eliminator.

1. The two mounting screws in the front of theCRV must be removed.

2. The power connectors for the CRV (located onthe right side of the unit) must be disconnected.Squeeze the tabs on the sides of the connectorand pull straight out. Unplug both of theconnectors.

3. Slide the CRV straight out of the unit.

The mist eliminator can be seen through the opening inthe back of the unit. The mist eliminator must be raisedup and the bottom can be pulled toward the front of theunit and removed.


FIGURE 19FRESH AIR DAMPER REMOVAL

MIS-1627

MOUNTING SCREW


FIGURE 20QERV REMOVAL

MIS-1039

MOUNTING SCREWS

FRONT FILL

LOWER BLOWERASSEMBLY POWER

CONNECTOR

POWERCONNECTORS


SEQUENCE OF OPERATIONCooling – Circuit R-Y makes the thermostat pull in thecompressor contactor starting the compressor andoutdoor motor. The G (indoor motor) circuit isautomatically completed on any call for coolingoperation, or can be energized by manual fan switch onsubbase for constant air circulation.

Heating – A 24V solenoid coil on reversing valvecontrols heating cycle operation. Two thermostatoptions, one allowing “Auto” change over from cycle tocycle and the other constantly energizing solenoid coilduring heating season and thus eliminating pressureequalization noise except during defrost, are to be usedon “Auto” option, a circuit is completed for R-W1 andR-Y on each heating “on” cycle, energizing reversingvalve solenoid and pulling in compressor contactorstarting compressor and outdoor motor. R-G also makesstarting indoor blower motor. Heat pump heating cyclenow in operation.

The second option has no “Auto” change over position,but instead energizes the reversing valve solenoidconstantly whenever the system switch on subbase isplaced in “Heat” position, the “B” terminal beingconstantly energized from R. A thermostat demand forheat completes R-Y circuit, pulling in compressorcontactor starting compressor and outdoor motor. R-Galso make starting indoor blower motor.

High / Low Pressure control provides protection for thecompressor. In the advent system pressures go above450 PSI or below 3.5 PSI in either cooling or heatingmode the compressor will be stopped. This will activatethe red light located in the control panel. The lockoutcircuit will hold compressor off line. When the systemproblem is corrected, the unit operation can be restoredby turning of the main power supply off and then backon, or reset the room thermostat. The low pressure

control has a bypass to eliminate nuisance lockout oncold start up.

The bypas timer should be set to 200 seconds, and this isto assure there is no nuisance tripping of the low-pressure control during startup in heating mode undercold weather conditions. See Figure 22.

OPTIONAL CLIMATE CONTROLSSEQUENCE OF OPERATIONThe Climate Control Option A is an electronic, non-programmable manual or auto changeover thermostat.The thermostat may be manually set to heat or coolmode. The thermostat will maintain the temperature seton the thermostat in the mode in which it is set.

The Climate Control Option D is an electronic,programmable thermostat. The thermostat can be set inthe heat, cool or automatic mode. When the thermostatis sent in the heat mode, it can heat only to maintain thetemperature set on the thermostat. When the thermostatis set in the cool mode, it can cool only to maintain thetemperature set on the thermostat. When the thermostatis set in the automatic mode, the thermostat can changeautomatically to the heat or cool modes to maintain thetemperature set on the thermostat.

PRESSURE SERVICE PORTSHigh and low pressure service ports are installed on allunits so that the system operating pressures can beobserved. Pressure curves can be found later in themanual covering all models on both cooling and heatingcycles. It is imperative to match the correct pressurecurve to the unit by model number. Upper and lowerservice doors must be attached to obtain proper reading.

FIGURE 21HEAT PUMP CONTROL BOARD (HPC)

MIS-973


DEFROST CYCLEThe defrost cycle is controlled by temperature and timeon the solid state heat pump control.

When the outdoor temperature is in the lower 40°Ftemperature range or colder, the outdoor coiltemperature is 32°F or below. This coil temperature issensed by the coil sensor mounted near the bottom ofthe outdoor coil. Once coil temperature reaches 30°F orbelow, the coil sends a signal to the control logic of theheat pump control and the defrost timer will start.

After 30 minutes at 30°F or below, the heat pumpcontrol will place the system in the defrost mode.

During the defrost mode the refrigerant cycle switchesback to the cooling cycle, the outdoor motor stops,electric heaters are energized, and hot gas passingthrough the outdoor coil melts any accumulated frost.When the temperature rises to approximately 57°F, thecoil sensor will send a signal to the heat pump controlwhich will return the system to heating operationsautomatically.

If some abnormal or temporary condition such as a highwind causes the heat pump to have a prolonged defrostcycle, the heat pump control will restore the system toheating operation automatically after 10 minutes.

There are three settings on the heat pump control – 30minute, 60 minute and 90 minute. Models are shippedwired on the 30 minute setting for greatest operatingeconomy. If special circumstances require a change toanother time, remove wire connected to terminal 30 andreconnect to desired terminal. Refer to Figure 21. Themanufacturer’s recommendation is for 30 minute defrostcycles.

There is a cycle speed up jumper on the control. Thiscan be used to reduce the time between defrost cycleoperation without waiting for time to elapse.

Use a small screwdriver or other metallic object, oranother 1/4 inch QC, to short between the SPEEDUP

terminals to accelerate the HPC timer and initiatedefrost. Be careful not to touch any other terminals withthe instrument used to short the SPEEDUP terminals. Itmay take up to 10 seconds with the SPEEDUP terminalsshorted for the speedup to be completed and the defrostcycle to start.

As soon as the defrost cycle kicks in remove theshorting instrument from the SPEEDUP terminal.Otherwise the timing will remain accelerated and runthrough the 1-minute maximum defrost length sequencein a matter of seconds and will automatically terminatethe defrost sequence.

There is an initial defrost jumper (sen jmp) on thecontrol that can be used at any outdoor ambient duringthe heating cycle to simulate a 0° coil temperature. Thiscan be used to check defrost operation of the unitwithout waiting for the outdoor ambient to fall into thedefrost region.

By placing a jumper across the SEN JMP terminals (a1/4 inch QC terminal works best) the defrost sensormounted on the outdoor coil is shunted out and willactivate the timing circuit. This permits the defrostcycle to be checked out in warmer weather conditionswithout the outdoor temperature having to fall into thedefrost region.

In order to terminate the defrost test the SEN JMPjumper must be removed. If left in place too long thecompressor could stop due to the high pressure controlopening because of high pressure condition created byoperating in the cooling mode with outdoor fan off.Pressure will rise fairly fast as there is likely no actualfrost on the outdoor coil in this artificial test condition.

There is also a 5 minute compressor time delay functionbuilt into the HPC. This is to protect the compressorfrom short cycling conditions. In some instances, it ishelpful to the service technician to override or speed upthis timing period, and shorting out the SPEEDUPterminals for a few seconds can do this.

FIGURE 22LOW PRESSURE CONTROL BYPASS TIMER

MIS-1917


TROUBLESHOOTING

TABLE 5TROUBLESHOOTING

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)2

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)1

)2

nrutC-1LneewtebegatlovonfIteserotniaganodnaffotatsomreht

.hctiwserusserphgih

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.hctiws

elcyctrohsrosserpmoCnoitcetorp

dnaC-CCneewtebV42rofkcehC.lortnocpmuptaehnoC-Y

repmujC-CCneewtebegatlovonfI01nihtiwdnalanimretpudeeps

neewtebraeppadluohsrewopsdnocesretfarepmujpudeepsevomeR.C-CC

.sdnoces01

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CHECKING TEMPERATURE SENSOR1. Disconnect temperature sensor from board and

from outdoor coil.

2. Use an ohmmeter and measure the resistance ofthe sensor. Also use ohmmeter to check for shortor open.

3. Check resistance reading to chart of resistanceuse sensor ambient temperature. (Tolerance ofpart is ± 10%.)

4. If sensor resistance reads very low, then sensor isshorted and will not allow proper operation of theheat pump control.

5. If sensor is out of tolerance, shorted, open, orreads very low ohms then it should be replaced.

SOLID STATE HEAT PUMP CONTROLTROUBLESHOOTING PROCEDURE

1. Turn on AC power supply to indoor and outdoorunits.

2. Turn thermostat blower switch to “fan on” – theindoor blower should start. (If it doesn’t,troubleshoot indoor unit and correct problem.)

3. Turn thermostat blower to “auto” position.Indoor blower should stop.

4. Set system switch to “heat” or “cool”. Adjustthermostat to call for heat or cool. The indoorblower, compressor and outdoor fan should start.

NOTE: If there was no power to 24 volt transformer,the compressor and outdoor fan motor will notstart for 5 minutes. This is because of thecompressor short cycle protection.

TABLE 6TEMPERATURE (F) VS RESISTANCE (R) OF TEMPERATURE SENSOR

F R F R F R F R

0.52-0.42-0.32-0.22-0.12-0.02-0.91-0.81-0.71-0.61-0.51-0.41-0.31-0.21-0.11-0.01-0.9-0.8-0.7-0.6-0.5-0.4-0.3-0.2-0.1-0.00.10.20.30.40.50.60.70.80.90.010.110.21

1786919900915853818137719821717845614099519254515539414734416759316594316050319126219802218018112724115750110107014753010620014607918939800199318817358996281210823677032570192707607705868146699346944265650654785

0.310.410.510.610.710.810.910.020.120.220.320.420.520.620.720.820.920.030.130.230.330.430.530.630.730.830.930.040.140.240.340.440.540.640.740.840.940.05

5896548255046351502541505820940957400264558444553459224770148989375783256733856384553545434753343623327130480368992751925538277572328622906238352696420304248332857220512216512989025340269891

0.350.250.350.450.550.650.750.850.950.060.160.260.360.460.560.660.760.860.960.070.170.270.370.470.570.670.770.870.970.080.180.280.380.480.580.680.780.88

47391768815738198971434714896174561221610175101351129414454177141028314743173131018212942138121388111951170311130112670110501742010000106796259992977092688356894480528750896876867

0.980.090.190.290.390.490.590.690.790.890.990.0010.1010.2010.3010.4010.5010.6010.7010.8010.9010.0110.1110.2110.3110.4110.5110.6110.7110.8110.9110.0210.1210.2210.3210.421

705743375617000704863866135638369326890616957285796507556445623580254905289437847674366426544644763447242814390460041293838375738763106362532543


FAN BLADE SETTING DIMENSIONSAny service work requiring removal or adjustment inthe fan and/or motor area will require that thedimensions in Table 7 be checked and blade adjusted inor out of the motor shaft accordingly.

1 Maximum ESP (inches WC) shown is with 1" thick disposable filter (reduced by .2 for 2" filter).2 Rated CFM for ducted applications – required for maximum performance rating. To obtain full CFM on models QH362, QH422,

QH482 and QH602 connect the pink jumper wire (provided) to terminal #G2 and #Y on the low voltage terminal block located inthe circuit breaker box.

3 Optional CFM – the unit is shipped from the factory set to operate at the optional CFM level shown. This provides loweroperating sound levels for non-ducted, free discharge applications. This reduces system capacity performance by approximately2% at the same energy efficiency.

4 Continuous fan CFM is the total air being circulated during continuous fan mode.5 Models QH242 – when operating on 2nd stage heating the indoor air will increase to 1000 CFM.

REFRIGERANT CHARGEThe correct system R-22 charge is shown on the unitrating plate. Optimum unit cooling performance willoccur with a refrigerant charge resulting in a Super Heatas shown in Table 8. If correct charge is in doubt,recover the refrigerant and recharge per the charge onthe unit rating plate.

FIGURE 23FAN BLADE SETTING

MIS-983

TABLE 7FAN BLADE DIMENSIONS

LEDOMANOISNEMID

)SEHCNI(

342HQ203HQ263HQ224HQ284HQ206HQ

057.057.057.057.057.057.

TABLE 8SUPER HEAT AT COMPRESSOR

LEDOMDETAR

MFCDOF°59

ERUTAREPMETDOF°28

ERUTAREPMET342HQ 008 81-61 61-41203HQ 0001 81-61 71-51263HQ 0021 81-61 61-41224HQ 0021 12-91 81-61284HQ 0041 52-32 42-22206HQ 0551 9-7 51-31

NOTE: These units are equipped with a variable speed (ECM) indoor motor that automatically adjust itself tomaintain approximately the same rate of indoor air flow in both heating and cooling, dry and wet coilconditions and at both 230/208 or 460 volts.

TABLE 9INDOOR BLOWER PERFORMANCE

ledoM PSEdetaR

1

PSE.xaM

2

MFCdetaR

3lanoitpO

MFC

4suounitnoC

MFC@MFC

xaM PSE.

342HQ 5 01. 5.0 008 008 007

203HQ 51. 8.0 0001 0001 019

263HQ 51. 8.0 0021 0001 0001 5711

224HQ 51. 8.0 0021 0001 0001 5711

284HQ 51. 8.0 0041 0011 0011 5711

206HQ 02. 5.0 0551 0521 0521 0041


Low side pressure ± 2 psigHigh side pressure ± 5 psig

Tables are based upon rated CFM (airflow) across the evaporator coil. If there is any doubt as to correctoperating charge being in the system, the charge should be removed, system evacuated and recharged toserial plate instructions.

75°F outdoor temperature condenser fan motor is running on low speed.

TABLE 10COOLING PRESSURE

(ALL TEMPERATURES IN DEGREES F)

LEDOM

NRUTERRIA

.PMET ERUSSERP

1 LIOCROODTUOGNIRETNEERUTAREPMETRIA

57 08 58 09 59 001 501 011 511

342HQ

BD57BW26

ediSwoLediShgiH

37591

37991

47412

67922

77442

97952

08472

18982

38403

BD08BW76

ediSwoLediShgiH

87302

87402

97912

08432

28052

48462

58082

78692

88213

BD58BW27

ediSwoLediShgiH

48121

48312

58822

68442

88952

98472

19092

39503

49023

203HQ

BD57BW26

ediSwoLediShgiH

57622

57202

67242

77852

87372

97913

08303

18913

28533

BD08BW76

ediSwoLediShgiH

08822

08332

18842

28462

38082

48692

58113

68723

78343

BD58BW27

ediSwoLediShgiH

68832

68042

78752

88372

98092

09603

19323

29933

39653

263HQ

BD57BW26

ediSwoLediShgiH

47212

47512

57332

67152

77962

87782

97503

08323

18143

BD08BW76

ediSwoLediShgiH

97912

97022

08932

18752

28672

38492

48213

58133

68053

BD58BW27

ediSwoLediShgiH

58322

58822

68742

78762

88682

98503

09423

19343

29363

224HQ

BD57BW26

ediSwoLediShgiH

17642

17842

27462

37182

47992

57813

67933

77263

97583

BD08BW76

ediSwoLediShgiH

57152

67342

77072

87882

97703

08723

18943

28173

38593

BD58BW27

ediSwoLediShgiH

28162

28262

38972

48892

58813

68033

78163

88483

09904

284HQ

BD57BW26

ediSwoLediShgiH

96122

17732

27252

27072

37782

47503

57323

57343

67363

BD08BW76

ediSwoLediShgiH

57822

67442

67062

77672

87492

97213

08133

08153

18273

BD58BW27

ediSwoLediShgiH

18732

28252

28962

38582

48403

58323

68243

68363

78583

206HQ

BD57BW26

ediSwoLediShgiH

96442

07062

17772

27492

37313

47233

57253

67273

77393

BD08BW76

ediSwoLediShgiH

47052

57762

67482

77203

87123

97143

08163

18283

28304

BD58BW27

ediSwoLediShgiH

77952

87672

97492

08313

18233

28353

38473

48593

58714


Refer to notes following Table 10

TABLE 11HEATING PRESSURE

(ALL TEMPERATURES IN DEGREES F)

LEDOM

NRUTERRIA

.PMET ERUSSERP

LIOCROODTUOGNIRETNEERUTAREPMETRIA

0 5 01 51 02 52 03 53 04 54 05 55 06

342HQ 07 ediSwoLediShgiH

7741

21551

71461

32271

82181

33981

93891

44602

05512

55422

06232

56042

17942


61751

02361

42961

82571

33081

73781

14391

54991

94502

45112

85712

26222

76822


31741

71351

12951

52461

03171

43671

83281

24881

64491

15002

55602

95112

36712


31161

81861

22471

62081

13781

53391

93991

44602

84212

35812

75522

16132

56732


11451

51061

02761

42371

92081

33681

83291

24991

74602

25312

65912

06522

56232


12261

12661

22071

32571

52181

82781

13391

63002

14802

64612

35522

06432

86442

QTEC SERIES PACKAGED HEAT PUMP INSTALLATION …

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