INSTALLATION INSTRUCTIONS A80UH2V & 80G1UH2V...Ventilation Air in a confined space with air from...

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This is a safety alert symbol and should never be ignored. When you see this symbol on labels or inmanuals, be alert to the potential for personal injury or death.

Improper installation, adjustment, alteration, service ormaintenance can cause property damage, personal injuryor loss of life. Installation and service must be performedby a licensed professional installer (or equivalent), serviceagency or the gas supplier.

WARNING

Manufactured ByAllied Air Enterprises, Inc.

A Lennox International, Inc. Company215 Metropolitan Drive

West Columbia, SC 29170

This manual must be left with the homeowner for future reference.

INSTALLATION INSTRUCTIONSA80UH2V & 80G1UH2V

Warm Air Gas FurnaceUpflow / Horizontal Left and Right Air Discharge

TABLE OF CONTENTS

Unit Dimensions ............................................................ 2A80UH2V & 80G1UH2V Parts Arrangement ................ 3A80UH2V & 80G1UH2V Gas Furnace ......................... 4Shipping and Packing List ............................................ 4Safety Information ......................................................... 4Use of Furnace as a Construction Heater .................... 5General ......................................................................... 6Combustion, Dilution, Ventilation Air ............................. 6Setting Equipment ........................................................ 9Filters .......................................................................... 12Duct System ................................................................ 12Venting ........................................................................ 13

Gas Piping .................................................................. 23Electrical ..................................................................... 25Thermostat .................................................................. 27Unit Start-Up ............................................................... 30Heating Sequence of Operation ................................. 31Gas Pressure Adjustment ........................................... 33High Altitude ................................................................ 34Other Unit Adjustments ............................................... 34Maintenance ............................................................... 33Repair Parts List ......................................................... 37Wiring Diagram ........................................................... 38

*506471-01*

As with any mechanical equipment, personal injury canresult from contact with sharp sheet metal edges. Becareful when you handle this equipment.

CAUTION

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Model A

36814-1/2

A801UH2V/80G1UH2V

B C

in. mm in. mm in. mm

34013-3/8 33013

090-12

135-20

53321 50419-7/8 49519-1/2

62224-1/2 54623-3/8 58423

D

in. mm

2489-3/4

2038

1214-3/4

090-16

110-20

070-12

44617-1/2 41616-3/8 40616 1596-1/4090-20

A80UH2V & 80G1UH2V Unit Dimensions - inches (mm)

1 NOTE - 20C and 20D size units installed in upflow applicationsthat require air volumes of 1800 cfm (850 L/s or greater musthave one of the following:

1. Return air from single side transition will accommodate 20 x 25 x 1 in. (508 x 635 x 25 mm) cleanable air filter. (Required to maintain proper air velocity.)2. Single side return air with optional RAB Return Air Base3. Return Air from bottom and one side.4. Return air from both sides.5. Return air from bottom.

2 Flue outlet may be horizontal but furnace must be ventedvertically.3 Optional external side return air filter kit cannot be used withthe optional RAB Return Air Base.

* Consider sizing requirements for optional IAQ equipment beforecutting side return opening.

FRONT VIEW SIDE VIEW

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EXPLODED VIEW

CONTROL BOX

BLOWER ASSEMBLY

ACCESS PANEL

BURNER BOX

ROLLOUT SWITCH GAS VALVE

COMBUSTION AIR INDUCERPRESSURE SWITCH

COMBUSTION AIR INDUCER

HEAT EXCHANGER

CABINET

Figure 1

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A80UH2V & 80G1UH2V Gas FurnaceThe A80UH2V & 80G1UH2V gas furnace is shipped withready for installation in the upflow or horizontal position (leftor right). for horizontal left position the combustion airpressure switch must be moved). The furnace is shippedwith the bottom panel in place. The bottom panel must beremoved if the unit is to be installed in a horizontal application.The panel may also be removed in upflow applications.

The furnace is equipped for installation in natural gasapplications. A conversion kit (ordered separately) is requiredfor use in propane/LP gas applications.

Shipping and Packing List1 - Assembled Gas Furnace1 - Bag assembly containing the following:

2 - Screws3 - Wire nuts1 - Snap bushing1 - Snap Plug1 - Wire tie1 - Vent warning label1 - Owner’s manual and warranty card

Check equipment for shipping damage. If you find anydamage, immediately contact the last carrier.

Safety Information

DANGER OF EXPLOSION!

DANGER

There are circumstances in which odorant used withLP/Propane gas can lose its scent. In case of a leak,LP/Propane gas will settle close to the floor and may bedifficult to smell. An LP/Propane leak detector shouldbe installed in all LP applications.

Improper installation, adjustment, alteration, service ormaintenance can cause property damage, personalinjury or loss of life. Installation and service must beperformed by a licensed professional installer (orequivalent), service agency or the gas supplier.

WARNING

CertificationsThese units are CSA International certified to ANSI Z21.47.

In the USA, installation of gas furnaces must conform withlocal building codes. In the absence of local codes, unitsmust be installed according to the current National Fuel GasCode (ANSI-Z223.1). The National Fuel Gas Code isavailable from the following address: American NationalStandards Institute, Inc., 11 West 42nd Street, New York,NY 10036.

ClearancesAdequate clearance must be made around the air openingsinto the vestibule area. In order to ensure proper unitoperation, combustion and ventilation air supply must beprovided according to the current National Fuel Gas Code.Vent installations must be consistent with the venting tables(in this instruction) and applicable provisions of local buildingcodes.

This furnace is CSA International certified for installationclearances to combustible material as listed on the unitnameplate and in the tables in Figures 7 and 11. Accessibilityand service clearances must take precedence over fireprotection clearances.

NOTE: For installation on combustible floors, the furnaceshall not be installed directly on carpeting, tile, or othercombustible material other than wood flooring.

Installed LocationsFor installation in a residential garage, the furnace must beinstalled so that the burner(s) and the ignition source arelocated no less than 18 inches (457 mm) above the floor.The furnace must be located or protected to avoid physicaldamage by vehicles. When a furnace is installed in a publicgarage, hangar, or other building that has a hazardousatmosphere, the furnace must be installed according torecommended good practice requirements and currentNational Fuel Gas Code.

Please refer to specification sheets for available accessories.

As with any mechanical equipment, personal injury canresult from contact with sharp sheet metal edges. Becareful when you handle this equipment.

CAUTION

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Temperature Rise

NOTE: Furnace must be adjusted to obtain a temperaturerise within the range specified on the unit nameplate. Failureto do so may cause erratic limit operation and may result inpremature heat exchanger failure.

This furnace must be installed so that its electricalcomponents are protected from water.

Installed in Combination with a Cooling CoilWhen this furnace is used with cooling units, it shall beinstalled in parallel with, or on the upstream side of, coolingunits to avoid condensation in the heating compartment. SeeFigure 2. With a parallel flow arrangement, a damper (orother means to control the flow of air) must adequatelyprevent chilled air from entering the furnace. If the damperis manually operated, it must be equipped to preventoperation of either the heating or the cooling unit, unless itis in the full HEAT or COOL setting. See Figure 2.

This furnace may be installed in alcoves, closets, attics,basements, garages, and utility rooms in the upflow orhorizontal position.

This furnace design has not been certified forinstallation in mobile homes, recreational vehicles, oroutdoors.

Use of Furnace as a Construction HeaterAllied Air does not recommended the use of these units asa construction heater during any phase of construction. Verylow return air temperature, harmful vapors and operation ofthe unit with clogged or misplaced filters will damage theunit.

Units may be used for heating of buildings or structuresunder construction, if the following conditions are met:• The vent system must be permanently installed per these

installation instructions.

• A room thermostat must control the furnace. The use offixed jumpers that will provide continuous heating is notallowed.

• The return air duct must be provided and sealed to thefurnace.

• Return air temperature range between 60°F (16°C) and80°F (27°C) must be maintained.

• Air filters must be installed in the system and must bemaintained during construction.

• Air filters must be replaced upon constructioncompletion.

• The input rate and temperature rise must be set per thefurnace rating plate.

• One hundred percent (100%) outdoor air must beprovided for combustion air requirements duringconstruc-tion. Temporary ducting may supply outdoorair to the furnace. Do not connect duct directly to thefurnace. Size the temporary duct following theseinstructions in section for Combustion, Dilution andVentilation Air in a confined space with air from outside.

• The furnace heat exchanger, components, duct system,air filters and evaporator coils must be thoroughlycleaned following final construction clean-up.

• All furnace operating conditions (including ignition, inputrate, temperature rise and venting) must be verifiedaccording to these installation instructions.

When installed, this furnace must be electrically groundedaccording to local codes. In addition, in the United States,installation must conform with the current National ElectricCode, ANSI/NFPA No. 70. The National Electric Code (ANSI/NFPA No. 70) is available from the following address:

National Fire Protection Association1 Battery March ParkQuincy, MA 02269

NOTE: This furnace is designed for a minimum continuousreturn air temperature of 60° F (16°C) or an intermittentoperation down to 55° F (13°C) dry bulb for cases where anight setback thermostat is used. Return air temperaturemust not exceed 85° F (29°C) dry bulb.

Figure 2

Heating Unit Installed Parallel to Air Handler Unit

Heating Unit Installed Upstream of Cooling Unit

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GeneralThese instructions are intended as a general guide and donot supersede local codes in any way. Consult authoritieshaving jurisdiction before installation.

In addition to the requirements outlined previously, thefollowing general recommendations must be consideredwhen installing one of these furnaces:

• Place the furnace as close to the center of the airdistribution system as possible. The furnace should alsobe located close to the chimney or vent termination point.

• Do not install the furnace where drafts might blow directlyinto it. This could cause improper combustion.

• Do not block the furnace combustion air openings withclothing, boxes, doors, etc. Air is needed for propercombustion and safe unit operation.

• When the furnace is installed in an attic or other insulatedspace, keep insulation away from the furnace.

NOTE: The Commonwealth of Massachusetts stipulatesthese additional requirements:

• Gas furnaces shall be installed by a licensed plumberor fitter only.

• The gas cock must be “T handle” type.• When a furnace is installed in an attic, the passageway

to and service area surrounding the equipment shall befloored.

Combustion, Dilution & Ventilation AirIn the past, there was no problem in bringing in sufficientoutdoor air for combustion. Infiltration provided all the airthat was needed. In today’s homes, tight constructionpractices make it necessary to bring in air from outside forcombustion. Take into account that exhaust fans, appliancevents, chimneys, and fireplaces force additional air that couldbe used for combustion out of the house. Unless outsideair is brought into the house for combustion, negativepressure (outside pressure is greater than inside pressure)will build to the point that a downdraft can occur in the furnacevent pipe or chimney. As a result, combustion gases enterthe living space creating a potentially dangerous situation.

In the absence of local codes concerning air for combustionand ventilation, use the guidelines and procedures in thissection to install these furnaces to ensure efficient and safeoperation. You must consider combustion air needs andrequirements for exhaust vents and gas piping.

A portion of this information has been reprinted withpermission from the National Fuel Gas Code (ANSI-Z223.1).This reprinted material is not the complete and officialposition of the ANSI on the referenced subject, which isrepresented only by the standard in its entirety.

Product Contains Fiberglass Wool.

Disturbing the insulation in this product duringinstallation, maintenance, or repair will expose you tofiberglass wool. Breathing this may cause lung cancer.(Fiberglass wool is known to the State of California tocause cancer.)

Fiberglass wool may also cause respiratory, skin, andeye irritation.

To reduce exposure to this substance or for furtherinformation, consult material safety data sheets availablefrom address shown below, or contact your supervisor.

Allied Air Enterprises, Inc. 215 Metropolitan Drive West Columbia, SC 29170

WARNING

Insufficient combustion air can cause headaches,nausea, dizziness or asphyxiation. It will also causeexcess water in the heat exchanger resulting in rustingand premature heat exchanger failure. Excessiveexposure to contaminated combustion air will result insafety and performance related problems. Avoidexposure to the following substances in the combustionair supply:

Permanent wave solutionsChlorinated waxes and cleanersChlorine base swimming pool chemicalsWater softening chemicalsDe-icing salts or chemicalsCarbon tetrachlorideHalogen type refrigerantsCleaning solvents (such as perchloroethylene)Printing inks, paint removers, varnishes, etc.Hydrochloric acidAntistatic fabric softeners for clothes dryersMasonry acid washing materials

WARNING

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All gas fired appliances require air for the combustionprocess. If sufficient combustion air is not available, thefurnace or other appliances will operate inefficiently andunsafely. Enough air must be provided to meet the needsof all fuel burning appliances and appliances such as exhaustfans which force air out of the house. When fireplaces,exhaust fans, or clothes dryers are used at the same timeas the furnace, much more air is necessary to ensure propercombustion and to prevent a downdraft. Insufficient aircauses incomplete combustion which can result in carbonmonoxide.

In addition to providing combustion air, fresh outdoor airdilutes contaminants in the indoor air. These contaminantsmay include bleaches, adhesives, detergents, solvents andother contaminants which can corrode furnace components.

The requirements for providing air for combustion andventilation depend largely on whether the furnace is installedin an unconfined or a confined space.

Unconfined SpaceAn unconfined space is an area such as a basement orlarge equipment room with a volume greater than 50 cubicfeet (1.42 m3) per 1,000 Btu (.29 kW) per hour of thecombined input rating of all appliances installed in that space.This space also includes adjacent rooms which are notseparated by a door. Though an area may appear to beunconfined, it might be necessary to bring in outdoor air forcombustion if the structure does not provide enough air byinfiltration. If the furnace is located in a building of tightconstruction with weather stripping and caulking around thewindows and doors, follow the procedures in the air fromoutside section.

Confined SpaceA confined space is an area with a volume less than 50cubic feet (1.42 m3) per 1,000 Btu (.29 kW) per hour of thecombined input rating of all appliances installed in that space.This definition includes furnace closets or small equipmentrooms.

When the furnace is installed so that supply ducts carry aircirculated by the furnace to areas outside the spacecontaining the furnace, the return air must be handled byducts which are sealed to the furnace casing and whichterminate outside the space containing the furnace. This isespecially important when the furnace is mounted on aplatform in a confined space such as a closet or smallequipment room. Even a small leak around the base of theunit at the platform or at the return air duct connection cancause a potentially dangerous negative pressure condition.Air for combustion and ventilation can be brought into theconfined space either from inside the building or from outside.

Air from InsideIf the confined space that houses the furnace adjoins aspace categorized as unconfined, air can be brought in byproviding two permanent openings between the two spaces.Each opening must have a minimum free area of 1 squareinch (645 mm2) per 1,000 Btu (.29 kW) per hour of totalinput rating of all gas fired equipment in the confined space.Each opening must be at least 100 square inches (64516mm2). One opening shall be within 12 inches (305 mm) ofthe top of the enclosure and one opening within 12 inches(305 mm) of the bottom. See Figure 3.

Air from OutsideIf air from outside is brought in for combustion and ventilation,the confined space must have two permanent openings. Oneopening shall be within 12 inches (305 mm) of the top of theenclosure and one opening within 12 inches (305 mm) ofthe bottom. These openings must communicate directly orby ducts with the outdoors or spaces (crawl or attic) thatfreely communicate with the outdoors or indirectly throughvertical ducts. Each opening shall have a minimum freearea of 1 square inch (645 mm2) per 4,000 Btu (1.17 kW)per hour of total input rating of all equipment in the en-closure.See Figures 4 and 5. When communicating with theoutdoors through horizontal ducts, each opening shall havea minimum free area of 1 square inch (645 mm2) per 2,000Btu (.56 kW) per total input rating of all equipment in theenclosure. See Figure 6.

Figure 3

Equipment in Confined Space - All Air From Inside

NOTE: Each opening shall have a free area of at least one squareinch per 1,000 Btu (645 mm² per .29 kW) per hour of the total inputrating of all equipment in the enclosure, but not less than 100 squareinches (64546 mm²).

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When ducts are used, they shall be of the same crosssectional area as the free area of the openings to whichthey connect. The minimum dimension of rectangular airducts shall be no less than 3 inches (75 mm). In calculatingfree area, the blocking effect of louvers, grilles, or screensmust be considered. If the design and free area of protectivecovering is not known for calculating the size openingrequired, it may be assumed that wood louvers will have 20to 25 percent free area and metal louvers and grilles willhave 60 to 75 percent free area. Louvers and grilles mustbe fixed in the open position or interlocked with theequipment so that they are opened automatically duringequipment operation.

EQUIPMENT IN CONFINED SPACE(ALL AIR FROM OUTSIDE)

NOTE: Each air duct opening shall have a free area of at least onesquare inch per 2,000 Btu (645 mm² per .59 kW) per hour of thetotal input rating of all equipment in the enclosure. If the equipmentroom is located against an outside wall and the air openingscommunicate directly with the outdoors, each opening shall have afree area of at least 1 square inch per 4,000 Btu (645 mm² per 1.17kW) per hour of the total input rating of all other equipment in theenclosure.

Figure 6

EQUIPMENT IN CONFINED SPACE - ALL AIR FROM OUTSIDE(All Air through Ventilated Attic)

NOTE: The inlet and outlet air openings shall each have a free areaof at least one square inch per 4,000 Btu (645 mm² per 1.17 kW) perhour of the total input rating of all equipment in the enclosure.

Figure 5

Figure 4

EQUIPMENT IN CONFINED SPACE - ALL AIR FROM OUTSIDE

NOTE: The inlet and outlet air openings shall each have a free areaof at least one square inch per 4,000 Btu (645 mm² per 1.17 kW) perhour of the total input rating of all equipment in the enclosure.

(Inlet Air from Crawlspace &Outlet Air to Ventilated Attic)

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The gas furnace can be installed as shipped in either theupflow position or the horizontal position.

Select a location that allows for the required clearances thatare listed on the unit nameplate. Also consider gas supplyconnections, electrical supply, vent connection, andinstallation and service clearances [24 inches (610 mm) atunit front]. The unit must be level.

NOTE: Units with 1/2 hp blower motors are equipped withthree flexible legs and one rigid leg. See Figure 7. The rigidleg is equipped with a shipping bolt and a flat white plasticwasher (rather than the rubber mounting grommet used witha flexible mounting leg). The bolt and washer must beremoved before the furnace is placed into operation. Afterthe bolt and washer have been removed, the rigid leg willnot touch the blower housing.

Setting Equipment

WARNING

Do not install the furnace on its front or its back. Do notconnect the return air ducts to the back of the furnace.Doing so will adversely affect the operation of the safetycontrol devices, which could result in personal injury ordeath.

Upflow ApplicationsAllow for clearances to combustible materials as indicatedon the unit nameplate. Minimum clearances for closet oralcove installations are shown in Figure 8.

Figure 7

Units with 1/2 HPBlower Motor.

Figure 8

Upflow Application Installation Clearances

* Front clearance In alcove Installation must be 24 in. (610 mm).Maintain a minimum of 24 in. (610 mm) for front service access.‡ For installation on a combustible floor, do not install the furnacedirectly on carpeting, tile or other combustible materials other thanwood flooring.† Left side requires 3 inches if a single wall vent is used on 14-1/2inch cabinets.

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Return Air - Upflow ApplicationsReturn air can be brought in through the bottom or eitherside of the furnace installed in an upflow application. If thefurnace is installed on a platform with bottom return, makean airtight seal between the bottom of the furnace and theplatform to ensure that the furnace operates properly andsafely. The furnace is equipped with a removable bottompanel to facilitate installation.

Markings are provided on both sides of the furnace cabinetfor installations that require side return air. Cut the furnacecabinet at the maximum dimensions shown on page 2.

NOTE: 20C and 20D units that require air volumes over1800 cfm (850 L/s) must have one of the following:

1. Single side return air with transition toaccommodate 20 x 25 x 1 in. (508 x 635 x 25 mm)cleanable air filter. (Required to maintain proper airvelocity.) See Figure 9.

2. Single side return air with optional return airbase.See Figure 10.

3. Bottom return air.4. Return air from both sides.5. Bottom and one side return air.

Figure 9

Single Side Return Air(with transition and filter)

Optional Return Air Base(Upflow Applications Only - For use with A, B, C and D cabinets))

NOTE: Optional Side Return Air Filter Kits are not for use with Return Air Base.1 Both the unit return air opening and the base return air opening must be covered by a single plenum or IAQ cabinet. Minimum unit side return air opening dimensions for units requiring 1800 cfm or more of air (W x H): 23 x 11 in. (584 x 279 mm). The opening can be cut as needed to accommodate plenum or IAQ cabinet while maintaining dimensions shown. Side return air openings must be cut in the field. There are cutting guides stenciled on the cabinet for the side return air opening. The size of the opening must not extend beyond the markings on the furnace cabinet.

² To minimize pressure drop, the largest opening height possible (up to 14 inches) is preferred.

FRONT VIEW

Figure 10

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Removing the Bottom PanelRemove the two screws that secure the bottom cap to thefurnace. Pivot the bottom cap down to release the bottompanel. Once the bottom panel has been removed, reinstallthe bottom cap. See Figure 11.

Horizontal ApplicationsThe furnace can be installed in horizontal applications. Orderhorizontal suspension kit (51W10) from Allied Air, or useequivalent suspension method.

Allow for clearances to combustible materials as indicatedon the unit nameplate. Minimum clearances for closet oralcove installations are shown in Figure 12.

This furnace may be installed in either an attic or a crawlspace. Either suspend the furnace from roof rafters or floorjoists, as shown in Figure 13, or install the furnace on aplatform, as shown in Figure 14.

NOTE: Heavy gauge perforated sheet metal straps maybe used to suspend the unit from roof rafters or ceiling joists.When straps are used to suspend the unit in this way, supportmust be provided for both the ends. The straps must notinterfere with the plenum or exhaust piping installation.Cooling coils and supply and return air plenums mustbe supported separately.

NOTE: When the furnace is installed on a platform in acrawlspace, it must be elevated enough to avoid waterdamage and to allow the evaporator coil to drain.

Return Air - Horizontal ApplicationsReturn air must be brought in through the end of a furnaceinstalled in a horizontal application. The furnace is equippedwith a removable bottom panel to facilitate installation. SeeFigure 11.

Figure 11

Removing the Bottom Panel

Horizontal ApplicationInstallatioin clearances

* Front clearance in alcove installation must be 24 in. (610 mm).Maintain a minimum of 21 in. (610 mm) for front service access.‡ For installations on a combustible floor, do not install the furnacedirectly on carpeting, tile or other combustible materials other thanwood flooring.

Figure 12

Typical Horizontal ApplicationUnit Suspended in Attic or Crawlspace

Figure 13

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FiltersThis unit is not equipped with a filter or rack. A field providedhigh velocity filter is required for the unit to operate properly.Table 1 lists recommended filter sizes.

A filter must be in place any time the unit is operating.

Duct SystemUse industry approved standards (such as those publishedby Air Conditioning Contractors of America or AmericanSociety of Heating, Refrigerating and Air ConditioningEngineers) to size and install the supply and return air ductsystem. This will result in a quiet and low static system thathas uniform air distribution.

NOTE: Do not operate the furnace in the heating modewith an external static pressure that exceeds 0.8 inches w.c.Higher external static pressures may cause erratic limitoperation.

Supply Air PlenumIf the furnace is installed without a cooling coil, a removableaccess panel must be installed in the supply air duct. Theaccess panel should be large enough to permit inspection(either by smoke or reflected light) of the heat exchangerfor leaks after the furnace is installed. The furnace accesspanel must always be in place when the furnace is operatingand it must not allow leaks into the supply air duct system.

Return Air Plenum

NOTE: Return air must not be drawn from a room wherethis furnace, or any other gas fueled appliance (i.e., waterheater), or carbon monoxide producing device (i.e., woodfireplace) is installed.

When return air is drawn from a room, a negative pressureis created in the room. If a gas appliance is operating in aroom with negative pressure, the flue products can be pulledback down the vent pipe and into the room. This reverseflow of the flue gas may result in incomplete combustionand the formation of carbon monoxide gas. This toxic gasmight then be distributed throughout the house by the furnaceduct system.

In upflow applications, the return air can be brought in throughthe bottom or either side of the furnace. If a furnace withbottom return air is installed on a platform, make an airtightseal between the bottom of the furnace and the platform toensure that the unit operates properly and safely. Usefiberglass sealing strips, caulking, or equivalent sealingmethod between the plenum and the furnace cabinet toensure a tight seal. If a filter is installed, size the return airduct to fit the filter frame.

WARNING

The inner blower panel must be securely in place whenthe blower and burners are operating. Gas fumes,which could contain carbon monoxide, can be drawninto living space resulting in personal injury or death.

WARNING

Improper installation of the furnace can result in personalinjury or death. Combustion and flue products mustnever be allowed to enter the return air system or theliving space. Use screws and joint tape to seal the returnair system to the furnace.

In platform installations with bottom return air, the furnaceshould be sealed airtight to the return air plenum. Adoor must never be used as a portion of the return airduct system. The base must provide a stable supportand an airtight seal to the furnace. Allow absolutely nosagging, cracks, gaps, etc..

The return and supply air duct systems must never beconnected to or from other heating devices such as afireplace or stove, etc.. Fire, explosion, carbonmonoxide poisoning, personal injury and/or propertydamage could result.

Figure 14

Horizontal ApplicationUnit installed on Platform

Table 1

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VentingA 4 inch diameter flue transition is factory installed on thecombustion air inducer outlet of all models. Figure 16 showsthe combustion air inducer as shipped from the factory.

The unit will not vent properly with the flue transitionpointed down in the 6 o’clock position.

The combustion air inducer may be rotated clockwiseor counterclockwise by 90° to allow for top or side ventdischarge in all applications. When the unit is installed,the flue transition must be in the 9 o’clock, 12 o’clock or3 o’clock position.

IMPORTANT

If necessary reposition the combustion air inducer, pressureswitch and/or make-up box as needed per the followingsteps. See Figures 16 through 22.1. Remove the four mounting screws (Figure 15) whichsecure the combustion air inducer / pressure switchassembly to the orifice plate. Lift the assembly and rotate it90° clockwise or counter clockwise to either the 3 o’clockposition or 9 o’clock position. Resecure with four secrews.Gasket should be left in place.2. Use tin snips to cut preferred opening on the cabinet forrepositioning the flue outlet. Use the cut-out piece as a coverplate to patch unused opening on cabinet.

Figure 17

• Remove make-up box assembly (2 screws) and cut wire tie to free make-up box wires. Reinstall make-up box on other side of cabinet.

• Resecure make-up box wires: Either pull excess wires through the blowercompanrtment and secure using supplied wire tie, or coil excess wire andsecure to the gas manifold.

UPFLOW POSITIONLeft Side Vent Discharge

Figure 18

UPFLOW POSITIONRight Side Vent Discharge

• Pressure switch tubing may be too long. Cut to fit, then reattach to barbedfitting on pressure switch. Tubing must not be allowed to sag.

UPFLOW POSITIONTop Vent Discharge

Figure 16

Mounting Screws Location

Figure 15

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Horizontal Position

HORIZONTAL LEFT POSITIONTop Vent discharge

Figure 19

• Disconnect pressure switch hose from barbed fitting on the pressureswitch assembly. Remove pressure switch assembly (1 screw) and cutwire tie to free pressure switch wires. Reinstall pressure switch on theother side of orifice plate and reconnect pressure switch hose.

• Resecure pressure seitch wires: Either pull excess wires through theblower compartment and secure using supplied wire tie, or coil excesswire and secure to the gas manifold.

HORIZONTAL RIGHT POSITIONTop Vent Discharge

Figure 21

• Remove make-up box assembly (2 screws) and cut wire tie to free make-up box wires. Reinstall make-up box on other side of cabinet.

• Resecure make-up box wires: Either pull excess wires through the blowercompartment and secure using supplied wire tie, or coil excess wire andsecure to the gas manifold.

HORIZONTAL RIGHT POSITIONSide Vent Discharge

Figure 22

HORIZONTAL LEFT POSITIONSide Vent Discharge

Figure 20

• Disconnect pressure switch hose from barbed fitting on the pressureswitch assembly. Remove pressure switch assembly (1 screw) and cutwire tie to free pressure switch wires. Reinstall pressure switch on theother side of orifice plate and reconnect pressure switch hose.

• Resecure pressure seitch wires: Either pull excess wires through theblower compartment and secure using supplied wire tie, or coil excesswire and secure to the gas manifold.

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Once the venting system is installed, attach the“Disconnected Vent” warning sticker to a visible area ofthe plenum near the vent pipe. See Figure 23. Thewarning sticker is provided in the bag assembly. Orderkit 66W04 for additional stickers.

IMPORTANT

These series units are classified as fan assisted Category Ifurnaces when vertically vented according to the latest editionof National Fuel Gas Code (NFPA 54 / ANSI Z223.1) in theUSA. A fan assisted Category I furnace is an applianceequipped with an integral mechanical means to either drawor force combustion products through the combustionchamber and/or heat exchanger. This unit is not approvedfor use with horizontal venting.

NOTE: Use these instructions as a guide. They do notsupersede local codes. This furnace must be ventedaccording to all local codes these installation instructions,and the provided venting tables in these instructions.

The venting tables in this manual were extracted from theNational Fuel Gas Code (NFPA 54 / ANSI Z223.1) and areprovided as a guide for proper vent installation. Properapplication, termination, construction and location of ventsmust conform to local codes having jurisdiction. In theabsence of local codes, the NFGC serves as the definingdocument.

Refer to the tables and the venting information contained inthese instructions to properly size and install the ventingsystem.

Asphyxiation hazard. The exhaust vent for this furnacemust be securely connected to the furnace flue transitiionat all times.

WARNING

Use self drilling sheet metal screws or a mechanical fastenerto firmly secure the vent pipe to the round collar of the fluetransition. If self drilling screws are used to attach the ventpipe, it is recommended that three be used. Drive one selfdrilling screw through the front and one through each sideof the vent pipe and collar. See Figure 23.

Install the first vent connector elbow at a minimum of sixinches (152 mm) from the furnace vent outlet. See Figure23.

Venting Using a Masonry ChimneyThe following additional requirements apply when a linedmasonry chimney is used to vent this furnace.

Masonry chimneys used to vent Category I central furnacesmust be either tile lined or lined with a listed metal liningsystem or dedicated gas vent. Unlined masonry chimneysare prohibited. See Figures 24 and 25 for common venting.

A chimney with one or more sides exposed to the outside ofthe structure is considered to be an exterior chimney.

An exterior masonry chimney that is not tile lined must belined with B1 vent or a listed insulated flexible metal vent.An exterior tile lined chimney that is sealed and capped maybe lined with a listed uninsulated flexible metal vent.

If the existing chimney will not accommodate a listed metalliner, either the chimney must be rebuilt to accommodateone of these liners or an alternate approved venting methodmust be found.Insulation for the flexible vent pipe must be an encapsulatedfiberglass sleeve recommended by the flexible vent pipemanufacturer. See Figure 24.

Figure 23

Vent Connection

Figure 24

Common Venting Using Metal LinedMasonry Chimney

NOTE 1: Refer to the provided venting tables for installations.Refer to the capacity requirements shown in the provided ventingtables.

506471-01 of 41 Issue 1034

DO NOT insulate the space between the liner and thechimney wall with puffed mica or any other loose granularinsulating material.

SINGLE appliance venting of a fan assisted furnace intoa tile lined masonry chimney (interior or outside wall) isprohibited. The chimney must first be lined with eithertype B1 vent or an insulated single wall flexible ventlining system which has been sized according to theprovided venting tables and the vent pipe manufacturer’sinstructions.

IMPORTANT

A fan assisted furnace may be commonly vented into anexisting lined masonry chimney if the following conditionsare met:• The chimney is currently serving at least one drafthood

equipped appliance.• The vent connectors and chimney are sized according

to the provided venting tables.

If type B1 double wall vent is used inside a chimney, noother appliance can be vented into the chimney. The outerwall of type B1 vent pipe must not be exposed to flueproducts. A type B1 vent or masonry chimney liner shallterminate above the roof surface with a listed cap or a’iistedroof assembly according to the terms of their respectivelistings and the vent manufacturer’s instructions.

When inspection reveals that an existing chimney is not safefor the intended purpose, it shall be rebuilt to conform tonationally recognized standards, lined or relined with suitablematerials, or replaced with a gas vent or chimney suitablefor venting. The chimney passageway must be checkedperiodically to ensure that it is clear and free of obstructions.

Do not install a manual damper, barometric draft regulator,or flue restrictor between the furnace and the chimney.

Never connect a Category I appliance to a chimney that isservicing a solid fuel appliance. If a fireplace chimney flueis used to vent this appliance, the fireplace opening must bepermanently sealed.

A type B or listed chimney lining system that passes throughan unused masonry chimney flue is not considered to beexposed to the outdoors.

General Venting RequirementsVent these furnaces according to these instructions:1. Vent diameter recommendations and maximum

allowable piping runs are found in the provided ventingtables.

2. In no case should the vent or vent connector diameterbe less than the diameter specified in the providedventing tables.

3. The minimum vent capacity determined by the sizingtables must be less than the low fire input rating and themaximum vent capacity must be greater than the highfire input rating.

4 . Single appliance vents - If the vertical vent or tile linedchimney has a larger diameter or flow area than thevent connector, use the vertical vent diameter todetermine the minimum vent capacity and the ventconnector diameter to determine the maximum ventcapacity. The flow area of the vertical vent, however,shall not exceed 7 times the flow area of the listedappliance categorized vent area, drafthood outlet areaor flue collar area unless designed according toapproved engineering methods.

5. Multiple appliance vents - The flow area of the largestsection of vertical vent or chimney shall not exceed 7times the smallest listed appliance categorized ventarea, drafthood outlet area or flue collar area unlessdesigned according to approved engineering methods.

Common Venting Using Tile Lined Interior Masonry Chimney and Combined Vent Connector

NOTE: Refer to provided ventingtables for installations.

NOTE: The chimney must be properly sizedper provided venting tables or lined withlisted metal lining system.

Figure 25

506471-01 of 41Issue 1034

6. The entire length of single wall metal vent connectorshall be readily accessible for inspection, cleaning, andreplacement.

7. Single appliance venting configurations with zero laterallengths (Tables 3 and 4) are assumed to have no elbowsin the vent system. For all other vent configurations,the vent system is assumed to have two 90° elbows.For each additional 90° elbow or equivalent (for exampletwo 45° elbows equal one 90° elbow) beyond two, themaximum capacity listed in the venting table should bereduced by 10% (0.90 x maximum listed capacity).

8. The common venting Tables (5, 6,7, and 8) weregenerated using a maximum horizontal vent connectorlength of 1-1/2 feet (.46 m) for each inch (25 mm) ofconnector diameter as follows:

9. If the common vertical vent is offset, the maximumcommon vent capacity listed in the common ventingtables should be reduced by 20%, the equivalent of two90° elbows (0.80 x maximum common vent capacity).The horizontal length of the offset shall not exceed1-1/2 feet (.46 m) for each inch (25 mm) of commonvent diameter.

10. The vent pipe should be as short as possible with theleast number of elbows and angles required to completethe job. Route the vent connector to the vent using theshortest possible route.

11. A vent connector shall be supported without any dips orsags and shall slope a minimum of 1/4 inch (6.4 mm)per linear foot (305 mm) of connector, back toward theappliance.

12. Vent connectors shall be firmly attached to the furnaceflue collar by self drilling screws or other approvedmeans,except vent connectors of listed type B ventmaterial which shall be assembled according to themanufacturer’s instructions. Joints between sectionsof single wall connector piping shall be fastened byscrews or other approved means.

13. When the vent connector used for Category I appliancesmust be located in or pass through a crawl space, atticor other areas which may be cold, that portion of thevent connector shall be constructed of listed doublewalltype B vent material or material having equivalentinsulation qualities.

14. All venting pipe passing through floors, walls, andceilings must be installed with the listed clearance tocombustible materials and be fire stopped according tolocal codes. In absence of local codes, refer to NFGC(2223.1 ).

15. No portion of the venting system can extend into, orpass through any circulation air duct or plenum.

16. Vent connectors serving Category I appliances shall notbe connected to any portion of mechanical draft systemsoperating under positive pressure such as Category IIIor IV venting systems.

17. If vent connectors are combined prior to entering thecommon vent, the maximum common vent capacitylisted in the common venting tables must be reduced by10%, the equivalent of one 90° elbow (0.90 x maximumcommon vent capacity).

18. The common vent diameter must always be at least aslarge as the largest vent connector diameter.

19. In no case, shall the vent connector be sized more thantwo consecutive table size diameters over the size ofthe draft hood outlet or flue collar outlet.

20. Do not install a manual damper, barometric draftregulator or flue restrictor between the furnace and thechimney.

21. When connecting this appliance to an existing dedicatedor common venting system, you must inspect the ventingsystem’s general condition and look for signs ofcorrosion. The existing vent pipe size must conform tothese instructions and the provided venting tables. Ifthe existing venting system does not meet theserequirements, it must be resized.

Table 2

506471-01 of 41 Issue 1034

Capacity of Type B Double Wall Vents with Type B Double Wall ConnectorsServing a Single Category I Appliance

Table 3

NOTE: Single appliance venting configureations with zero lateral lengths are assumed to have no elbows in the vent system. For all other ventconfigurations, the vent system is assumed to have two 90 ° elbows. For each additional 90° elbow or equivalent (for example two 45° elbows equalone 90° elbow) beyond two, the maximum capacity listed in the venting table should be reduced by 10 percent (0.90 x maximum listed capacity).

506471-01 of 41Issue 1034

Capacity of Type B Double Wall Vents with Single Wall Metal ConnectorsServing a Single Category I Appliance

Table 4


506471-01 of 41 Issue 1034

Vent Connector CapacityType B Double Wall Vents with Type B Double Wall Connectors

Serving Two or More Category I Appliances

Common Vent CapacityType B Double Wall Vents with Type B Double Wall Connectors


Table 5

Table 6

506471-01 of 41Issue 1034

Vent Connector CapacityType B Double Wall Vents with Single Wall Metal Connectors


Table 7

Common Vent CapacityType B Double Wall Vents with Single Wall Metal Connectors

Serving Two or more Category I Appliances

Table 8


506471-01 of 41 Issue 1034

Removal of the Furnace from Common VentIn the event that an existing furnace is removed from aventing system commonly run with separate gas appliances,the venting system is likely to be too large to properly ventthe remaining attached appliances.

Conduct the following test while each appliance is operatingand the other appliances (which are not operating) remainconnected to the common venting system. If the ventingsystem has been installed improperly, you must correct thesystem as indicated in the general venting requirementssection.

The following steps shall be followed for each applianceconnected to the venting system being placed into operation,while all other appliances connected to the venting systemare not in operation:

1. Seal any unused openings in the common ventingsystem.

2. Inspect the venting system for proper size and horizontalpitch. Determine that there is no blockage, restriction,leakage, corrosion, or other deficiencies which couldcause an unsafe condition.

3. Close all building doors and windows and all doorsbetween the space in which the appliances remainingconnected to the common venting system are locatedand other spaces of the building. Turn on clothes dryersand any appliances not connected to the commonventing system. Turn on any exhaust fans, such asrange hoods and bathroom exhausts, so they willoperate at maximum speed. Do not operate a summerexhaust fan. Close fireplace dampers.

4. Follow the lighting instructions. Turn on the appliancethat is being inspected. Adjust the thermostat so thatthe appliance operates continuously.

5. After the burners have operated for 5 minutes, test forleaks of flue gases at the draft hood relief opening. Usethe flame of a match or candle.

6. After determining that each appliance connected to thecommon venting system is venting properly, (step 3)return all doors, widows, exhaust fans, fireplacedampers, and any other gas burning appliances to theirprevious mode of operation.

7. If a venting problem is found during any of the precedingtests, the common venting system must be modified tocorrect the problem.

Resize the common venting system to the minimum ventpipe size determined by using the appropriate tables inAppendix G. (These are in the current standards of theNational Fuel Gas Code ANSI 2223.1.

CARBON MONOXIDE POISONING HAZARD

Failure to follow the steps outlined below for eachappliance connected to the venting system being placedinto operation could result in carbon monoxide poisoningor death.

WARNING

506471-01 of 41Issue 1034

Gas Supply1. This unit is shipped standard for left or right side

installation of gas piping (or top entry in horizontalapplica-tions). Connect the gas supply to the pipingassembly.

2. When connecting the gas supply piping, consider factorssuch as length of run, number of fittings, and furnacerating to avoid excessive pressure drop. Table 9 listsrecommended pipe sizes for typical applications.

3. The gas piping must not run in or through air ducts,clothes chutes, gas vents or chimneys, dumb waiters,or elevator shafts.

NOTE: If emergency shutoff is necessary, shut off the mainmanual gas valve and disconnect main power to the furnace.The installer should properly label these devices.

4. The piping should be sloped 1/4 inch (6.4 mm) per 15feet (4.57 m) upward toward the meter from the furnace.The piping must be supported at proper intervals [every8 to 10 feet (2.44 to 3.01 m)] with suitable hangers orstraps. Install a drip leg in vertical pipe runs to the unit.

5. A 1/8" N.P.T. plugged tap or pressure post is located onthe gas valve to facilitate test gauge connection. SeeFigure 38.

6. In some localities, codes may require the installation ofa manual main shut off valve and union (furnished bythe installer) external to the unit. The union must be ofthe ground joint type.

Gas Piping

Compounds used on threaded joints of gas piping mustbe resistant to the actions of liquified petroleum gases.

IMPORTANT

If a flexible gas connector is required or allowed by theauthority that has jurisdiction, black iron pipe shall beinstalled at the gas valve and extend outside the furnacecabinet. The flexible connector can then be addedbetween the black iron pipe and the gas supply line.

CAUTION

Table 9

Gas Pipe Capacity - ft³/hr (m³/hr)

Note: Capacity given in cubic feet (m³) of gas per hour and based on 06.0 specific gravity gas.

506471-01 of 41 Issue 1034

NOTE: BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET

Figure 26

Horizontal ApplicationsPossible Gas Piping Configurations

NOTE: BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET

Figure 27

506471-01 of 41Issue 1034

Leak CheckAfter gas piping is completed, carefully check all pipingconnections (factory and field installed) for gas leaks. Usea leak detecting solution or other preferred means.

NOTE: If emergency shutoff is necessary, shut off the mainmanual gas valve and disconnect the main power to thefurnace. The installer should properly label these devices.

Some soaps used for leak detection are corrosive tocertain metals. Carefully rinse piping thoroughly afterleak test has been completed. Do not use matches,candles, flame or other sources of ignition to check forgas leaks.

CAUTION

The furnace must be isolated by closing its individual manualshut-off valve and disconnecting from from the gas supplysystem the during any pressure testing of the gas supplysystem at pressures less than or equal to 1/2 psig (3.48kPa, 14 inches w.c.).

Electrical

ELECTROSTATIC DISCHARGE (ESD)Precautions and Procedures

When testing pressure of gas lines, gas valve must bedisconnected and isolated. See Figure 28. Gas valvescan be damaged if subjected to pressures greater than1/2 psig (3.48 kPa, 14 inches w.c.).

IMPORTANT

Electrostatic discharge can affect electroniccomponents. Take precautions during furnaceinstallation and service to protect the furnace’s electroniccontrols. Precautions will help to avoid control exposureto electrostatic discharge by putting the furnace, thecontrol and the technician at the same electrostaticpotential. Neutralize electrostatic charge by touchinghand and all tools on an unpainted unit surface, suchas the gas valve or blower deck, before performing anyservice procedure.

CAUTION

The unit is equipped with a field make-up box on the lefthand side of the cabinet. The make-up box may be movedto the right side of the furnace to facilitate installation. If themake-up box is moved to the right side, clip the wire tiesthat bundle the wires together. The excess wire must bepulled into the blower compartment. Secure the excess wireto the existing harness to protect it from damage.

Refer to Figure 40 for schematic wiring diagram andtroubleshooting and Figure 41 for field wiring.

1. The power supply wiring must meet Class I restrictions.Protected by either a fuse or circuit breaker, select circuitprotection and wire size according to unit nameplate.

NOTE: Unit nameplate states maximum current draw.Maximum over current protection allowed is 15 AMP.

2. Holes are on both sides of the furnace cabinet to facilitatewiring.

3. Install a separate (properly sized) disconnect switch nearthe furnace so that power can be turned off for servicing.

Figure 28

INTERIOR MAKE-UP BOX INSTALLATION

Figure 29

INTERIOR MAKE-UP BOX INSTALLATION

Figure 30

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4. Before connecting the thermostat, check to make surethe wires will be long enough for servicing at a laterdate. Make sure that thermostat wire is long enough tofacilitate future removal of blower for service.

5. Complete the wiring connections to the equipment. Usethe provided unit wiring diagram and the field wiringdiagram shown in Figure 41. Use 18 gauge wire orlarger that is suitable for Class II rating for thermostatconnections.

6. Electrically ground the unit according to local codes or,in the absence of local codes, according to the currentNational Electric Code (ANSI/NFPA No. 70). A greenground wire is provided in the field make-up box.

NOTE: This furnace contains electronic components thatare polarity sensitive. Make sure that the furnace is wiredcorrectly and is properly grounded.

7. One line voltage “EAC” 1/4" spade terminal is providedon the furnace integrated control. Any electronic aircleaner or other accessory rated up to one amp can beconnected to this terminal with the neutral leg of thecircuit being connected to one of the provided neutralterminals. See Figure 41 for control configuration. Thisterminal is energized when the indoor blower isoperating.

8. One line voltage “HUM” 1/4" spade terminal is providedon the furnace integrated control. Any humidifier ratedup to one amp can be connected to this terminal withthe neutral leg of the circuit being connected to one ofthe provided neutral terminals. See Figure 41 for controlconfiguration. This terminal is energized in the heatingmode whenever the combustion air inducer is operating.

9. One 24V “H” terminal is provided on the furnaceinte-grated control terminal block. Any humidifier ratedup to 0.5 amp can be connected to this terminal withthe ground leg of the circuit being connected to eitherground or the “C” terminal. See Figure 41 for controlconfiguration.

10. Install the room thermostat according to the instructionsprovided with the thermostat. If the furnace is beingmatched with a heat pump, refer to the instructionpackaged with the dual fuel thermostat.

Indoor Blower Speeds1. When the thermostat is set to “FAN ON,” the indoor

blower will run continuously at approximately 38% ofthe second stage cooling speed when there is no coolingor heating demand.

2. When this unit is running in the heating mode, the indoorblower will run on the heating speed designated by thepositions of DIP switches 11 and 12.

3. When there is a cooling demand, the indoor blower willrun on the cooling speed designated by the positions ofDIP switches 5 and 6.

Generator Use - Voltage RequirementsThe following requirements must be kept in mind whenspecifying a generator for use with this equipment:• The furnace requires 120 volts ± 10% (Range: 108 volts

to 132 volts).• The furnace operates at 60 Hz ± 5% (Range: 57 Hz to

63 Hz).• The furnace integrated control requires both polarity and

proper ground. Both polarity and proper groundingshould be checked before attempting to operate thefurnace on either permanent or temporary power.

• Generator should have a wave form distortion of lessthan 5% RHO.

Electrical Wiring

Risk of electrical shock. Disconnect electrical power atthe circuit breaker or service panel before makingelectrical connections. Failure to disconnect powersupplies can result in property damage, personal injury,or death.

WARNING

The furnace must be grounded and wired in accordancewith local codes or, in the absence of local codes, with theNational Electrical Code ANSI/NFPA No. 70 (latest edition)and/or CSA C22.1 Electrical Code (latest edition) if anexternal electrical source is utilized.

Table 10

506471-01 of 41Issue 1034

In all instances, other than wiring for the thermostat, thewiring to be done and any replacement of wire shall conformwith the temperature limitation for Type T wire –63°F (35°C)rise.

Connect a sufficiently sized wire with ground to the furnace’sline voltage connections and ground lug. Refer to the furnacerating plate for electrical characteristics to be used in sizingfield supply wiring and overcurrent protection.

The line voltage supply should be routed through a readilyaccessible disconnect located within sight of the furnace. Ajunction box on the furnace side panel is provided for linevoltage connections. Refer to the furnace wiring diagramfor specific connection information.

Proper polarity of the supply connections (“HOT” and“NEUTRAL”) must be observed to ensure that safetycontrols provide the protection intended.

A connection to the ground lug and actual earth ground(typically a ground stake or buried steel pipe) must bemaintained for proper operation.

ThermostatInstall a room thermostat according to the instructionsfurnished with it. Select a location on an inside wall that isnot subject to drafts, direct sunshine, or other heat sources.The initial heat anticipator setting should be equal to thetotal current draw of the control circuit. Low voltagethermostat connections are to be made to the integratedignition/blower control board as indicated on the wiringdiagram.

Single Stage Thermostat Operation(A80UH2V and 80G1UH2V Models )The automatic heat staging option allows a single stagethermostat to be used with two stage furnace models(A80UH2V or 80G1UH2V). To activate this option, movethe jumper pin (see Figure 31) to desired setting (5 minutesor 10 minutes). The furnace will start on 1st stage heat andstay at 1st stage heat for the duration of the selected timebefore switching to 2nd stage heat.

W1 on the control board must be connected to W1 on thethermostat.

HumidifierTerminals are provided on the integrated ignition/blowercontrol board for connection to a 120-volt humidifier. The“HUM” terminal is energized whenever the thermostat callsfor heat. See the furnace wiring diagram for specificconnection information.

Automatic Heat Staging Jumper

Figure 31

Electronic Air CleanerTerminals are provided on the integrated ignition/blowercontrol board for connection of a 120-volt electronic aircleaner. The “EAC” terminal is energized whenever thethermostat calls for heat, cooling, or continuous blower. Seefurnace wiring diagram for specific connection information.

Variable Speed FeaturesThis furnace is equipped with a variable speed circulationair blower motor that will deliver a constant airflow within awide range of external static pressures. Other features ofthis variable speed motor include:

Soft StartThe variable speed motor will slowly ramp up to normaloperating speed. This minimizes noise and increasescomfort by eliminating the initial blasts of air encounteredwith standard motors.

Soft StopAt the end of a cooling or heating cycle, the variable speedmotor will slowly ramp down after a short blower “off” delay.If continuous blower operation has been selected, thevariable speed motor will slowly ramp down until it reachesthe airflow for that mode.

Passive and Active DehumidificationPassive DehumidificationFor situations where humidity control is a problem, adehumidification feature has been built into the variablespeed motor. At the start of each cooling cycle, the variablespeed motor will run at 82% of the rated airflow for 7.5minutes. After 7.5 minutes has elapsed, the motor willincrease to 100% of the rated airflow.

506471-01 of 41 Issue 1034

Active DehumidificationTo achieve additional dehumidification, clip the jumper wirelocated below the DEHUM terminal on the integrated ignition/blower control board and connect a humidity control thatopens on humidity rise to the DEHUM and R terminals. TheDEHUM terminal on the control board must be connectedto the normally closed contact of the humidity control so thatthe board senses an open circuit on high humidity. In thissetup, the variable speed motor will operate at a 18%reduction in the normal cooling airflow rate when there is acall for dehumidification.

Both the passive and active dehumidification methodsdescribed above can be utilized on the same furnace.

Circulating Airflow Adjustments

Cooling ModeThe units are factory set for the highest airflow for each model.Adjustments can be made to the cooling airflow byrepositioning the jumper plug marked COOL – A, B, C, D(see Figure 32) based on the information found in the table.To determine what CFM the motor is delivering at any time,count the number of times the amber LED on the control boardflashes. Each flash signifies 100 CFM; count the flashes andmultiply by 100 to determine the actual CFM delivered (forexample: 10 flashes x 100 = 1000 CFM).

Heating ModeThe unit as shipped is factory set to run at the middle of theheating rise range as shown on the unit rating plate. If higher orlower rise is desired, change the airflow 15% up or down bymoving the ADJUST jumper plug (see Figure 32) from the NORMposition to the (+) or (–) position. This adjustment will also causethe cooling airflow to be raised or lowered by 15%.

The TEST position on the ADJUST tap is not used.

The jumper plug on the HEAT tap should remain in the position(A, B, C, or D) listed in the HEAT Setting column in the tablefound in Figure 32. Changing the setpoints may not increase ordecrease heating blower speeds. In some cases, running theblower with the heat settings in the wrong position may causethe furnace to operate outside the furnace’s intended temperaturerise range.

Continuous Blower OperationThe comfort level of the living space can be enhanced whenusing this feature by allowing continuous circulation of airbetween calls for cooling or heating. The circulation of airoccurs at half the full cooling airflow rate.

To engage the continuous blower operation, place the fanswitch on the thermostat into the ON position. A call for fanfrom the thermostat closes R to G on the ignition controlboard. The control waits for a 1 second thermostat debouncedelay before responding to the call for fan by ramping thecirculating blower up to 50% of the cooling speed. Whenthe call for continuous fan is satisfied, the control immediatelyramps down the circulating blower.

Figure 32

ADJUST, HEAT, and COOL Tapson Integrated Ignition/Blower

Control Board

506471-01 of 41Issue 1034

ADJUSTING AIRFLOW

Table 11

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START-UP

Lighting Instructions

For Your Safety, Read Before Operating

These furnaces are equipped with an ignition device whichautomatically lights the burners. Do not try to light theburners by hand.

Before operating, smell all around the appliance area forgas. Be sure to smell next to the floor because some gas isheavier than air and will settle on the floor.

What to do if you smell gas:

• Do not try to light any appliances.

• Extinguish any open flame.

• Do not touch any electric switch; do not use any phonein your building.

• Immediately call your gas supplier from a neighbor’sphone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the firedepartment.

Do not use this furnace if any part has been under water.Immediately call a qualified service technician to inspect thefurnace and to replace any part of the control system andgas control which has been under water.

IMPORTANT: Refer to the Lighting Instruction label onthe furnace for instructions on operating the specificcontrols used on your unit.

1. Set the room thermostat to lowest setting.

2. Remove burner access door.

3. Move the gas control knob to the “ON” position. Useonly your hand to turn the gas control knob. Never usetools. If the knob will not turn by hand, don’t try to repairit; call a qualified service technician. Force orattempted repair may result in a fire or explosion.

4. Replace the burner access door.

5. Turn on the electrical power to the furnace.

6. Set room thermostat to a point above room temperatureto light the burners. After the burners have ignited, setroom thermostat to desired temperature.

To Shut Down Furnace:

1. Set the room thermostat to the lowest setting.

2. Turn off all electric power to the furnace.

3. Remove burner access door.

4. Shut off gas by moving gas control knob to “OFF” position.

5. Replace the burner access door.

If you do not follow these instructions exactly, a fire orexplosion may result causing property damage, personalinjury, or loss of life.

WARNING

Be sure the manual gas control has been in the “OFF”position for at least 5 minutes before starting the unit.Do not attempt to manually light the burners.

CAUTION

To Start Furnace:

Should overheating occur or the gas supply fail to shutoff, shut off the manual gas valve to the appliancebefore shutting off the electrical supply.

WARNING

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Sequence of Operation (see Figures 33 – 37)

HeatingOn a call for heat from the room thermostat, the control boardperforms a 1 second self check. Upon confirmation that thepressure switch contacts are in an open position, the controlenergizes the combustion blower on high speed. The controlthen checks for adequate combustion air by making surethe low-fire pressure switch contacts are closed.

The igniter energizes and is allowed to warm up for 7seconds before the gas valve energizes on 1st stage andburners ignite. 45 seconds after the control confirms ignitionhas occurred, the control drops the combustion blower tolow speed.

The circulating blower ramps up to 50% of 1st stage heat speedand operates at that speed for one minute (including ramp uptime), then at 75% of 1st stage heat speed for an additionalminute. After that, the circulating blower operates at full 1st

stage heat speed until either the heat call is satisfied or thethermostat initiates a call for 2nd stage heat. On a call for 2nd

stage heat, the control energizes the circulating air blower onfull CFM 2nd stage heat.

If the automatic heat staging option is being used (see SingleStage Thermostat Operation on page 27), the furnace doesnot switch to 2nd stage heat in response to a call from thethermostat but instead operates at 1st stage heat for theduration of the selected time before automatically switchingto 2nd stage heat.

When the call for heat is satisfied, the gas valve andcombustion air blower shut down. The control board shutsoff the gas valve and runs the combustion blower for anadditional 15 seconds. The circulating air blower continuesto run for 2 minutes at 82% of the selected heating speed(low fire or high fire) before ramping down.

In the event the unit loses ignition, the control will attempt torecycle up to five times before it goes into a 1 hour lockout.Lockout may be manually reset by removing power fromthe control for more than 1 second or removing thethermostat call for heat for more than 3 seconds.

If during a heating cycle the limit control senses an abnormallyhigh temperature and opens, the control board de-energizesthe gas valve and the combustion blower while the circulatingblower ramps up to 2nd stage heat speed. The circulating blowerremains energized until the limits are closed.

Fan OnWhen the thermostat is set for continuous fan operation andthere is no demand for heating or cooling, a call for fan closes

OPERATION the R to G circuit and the circulating blower motor runs at50% of the selected cooling CFM until switched off. Whenthe call for fan is turned off, the control de-energizes thecirculating blower.

CoolingThe unit is set up at the factory for single stage cooling. Fortwo stage cooling operation, clip the jumper wire locatedbetween the Y to Y2 terminals on the integrated ignition/blower control board.

If the active dehumidification feature is enabled, thecirculating blower runs at 82% of the selected cooling speedas long as there is a call for dehumidification.

Single Stage CoolingA call for cooling from the thermostat closes the R to Y circuiton the integrated ignition/blower control board. The controlwaits for a 1-second delay before energizing the circulatingblower to 82% of the selected cooling CFM (passivedehumidification mode). After 7.5 minutes, the circulatingblower automatically ramps up to 100% of the selected coolingairflow. When the call for cooling is satisfied, the circulatingblower ramps back down to 82% of the selected coolingairflow for 1 minute, then shuts off.

Two Stage CoolingA call for 1st stage cooling from the thermostat closes the Rto Y circuit on the control board. The control waits for a 1-second delay before energizing the circulating blower. Theblower motor runs at 57% of the selected air flow for the first7.5 minutes of the 1st stage cooling demand (passivedehumidification mode). After 7.5 minutes, the blower motorruns at 70% of the selected cooling air flow until 1st stagecooling demand is satisfied.

A call for 2nd stage cooling from the thermostat closes the R toY2 circuit on the control board. The blower motor ramps up to100% of the selected cooling air flow. When the demand forcooling is met, the blower ramps down to Y1 until satisfied,then ramps down to 57% for 1 minute, then turns off.

Heat PumpFor heat pump operation, clip the jumper wire located belowthe O terminal on the integrated ignition/blower control board.In heat pump mode, a call for heat will result in the circulatingair blower operating at the selected cooling airflow after abrief ramp-up period.

IMPORTANT

The system must not be in either the passive or activedehumidification mode when charging a cooling system.

506471-01 of 41 Issue 1034

Figure 35

Call for Fan

G g

50%

CALL OFF

G - Fan Switch ON

- Fan Switch OFFg

Figure 36

Single Stage Cooling

7.5 minutes

Y y

82%

100%

82%

1min

CALL OFF

Y - Cool Demand Present

- Cool Demand Satisfiedy

Figure 37

Two Stage Cooling

Y1

y1

57%

100%

CALL OFF

7.5minutes 70%

Y1 - 1 Stage Cool Demand Presentst

- Demand Satisfied1 Stage Coolsty1

Y2 - 2 Stage Cool Demand Presentnd

- 2 Demand Satisfiednd Stage Cooly2

1min

70%

Y1 y2/Y1/ Y2 y1

57%

1min57%

Figure 33

1st Stage - 2nd Stage (W1/W2) Heat Call

W1

100%*

CALL

W2 - High Heat Demand Present- High Heat Demand Satisfiedw2

50%*

75%*

** Percentage of High Fire CFM

1min

W1 - Heat Demand Present- Heat Demand Satisfiedw1

* Percentage of Low Fire CFM

100%**82%**

2 min

OFF

W1/W2 w1 w2

82%*

2 min

w1

1min

Figure 34

High Heat (W2) Call

W2

100*82%*

2 min

CALL OFFW2 - High Heat Demand Present- High Heat Demand Satisfiedw2

* Percentage of High Fire CFM

w2

506471-01 of 41Issue 1034

ControlsFollowing is a description of the operation of some of thecontrols used in this furnace. All models use one of eachcontrol, except as noted.

Pressure SwitchThe pressure switch is a normally open switch that monitorscombustion air flow. Inadequate air flow resulting fromexcessive venting system restriction or a failed combustionblower will cause the switch to remain open. A80UH2V and80G2UHV models have two pressure switches.

Rollout SwitchThe rollout switch is a normally closed switch that opens whenabnormal temperatures exist in the burner area. This can becaused by a restricted heat exchanger causing burner flameto “roll out” into the vestibule area or burner box.

This switch must be manually reset by pushing the buttonon top to restore furnace operation. A80UH2V and80G2UHV models have two rollout switches.

Primary Limit ControlThis is a normally closed control that opens if abnormallyhigh circulating air temperatures occur. It is an automaticreset control.

Auxiliary Limit ControlThis is a normally closed control, located on the circulatingair blower housing, that opens under abnormal “reverse airflow” conditions that could occur in a counterflow or horizontalinstallation if the circulating air blower fails. It is an automaticreset control.

Interlock (Blower Door) SwitchWhen the blower door is removed, the interlock switchbreaks the power supply to the burner controls and blowermotor. The switch operation must be checked to confirm itis operating correctly.

Checking and Adjusting Gas InputThe minimum permissible gas supply pressure for thepurpose of input adjustment is 5"w.c. for natural gas or 11"w..c. for propane gas. This furnace requires conversion foruse with propane (see Accessories section on page 26 forcorrect kit). The maximum inlet gas supply pressure is 10.5"w.c. for natural gas and 13" w.c. for propane. Gas inputmust never exceed the value shown on the furnace ratingplate.

These units are equipped for rated input at manifold pressuresof 1.7" w.c. (1st stage) and 3.5" w.c. (2nd stage) for natural gas.When these furnaces have been converted for use with

propane gas, the manifold pressures are 4.9" w.c. (1st stage)and 10.0" w.c. (2nd stage).

To measure inlet or outlet pressure, remove plug fromdesired pressure tap (inlet or outlet) as shown in Figure 38and connect a water manometer or gauge to the properpressure tap.

These models have separate adjusting screws (3/32" hex) for1st stage (marked “LO”) and 2nd stage (marked “HI”). Theadjusting screws are positioned on either side of the barbedfitting (see Figure 38). Turn the adjusting screws clockwise toincrease pressure and input; counterclockwise to decreasepressure and input. The pressure regulator adjustment issensitive; one turn of the adjusting screw will result in a relativelylarge change in manifold pressure.

To adjust the regulator:

1. Set high-fire (2nd stage) setting by turning hex adjustmentscrew to desired rate.

2. Set low-fire (1st stage) setting by turning hex adjustmentscrew to desired rate.

Make sure the final high and low fire manifold pressuresare within the allowable ranges specified above for thegas being used.

Be sure to replace the inlet and outlet pressure tap plugsafter testing and/or adjusting gas input.

Figure 38

GAS VALVE SHOWN IN “ON” POSITION

The furnace rate must be within +/- 2% of the appliancerating input.

CAUTION

506471-01 of 41 Issue 1034

The heating value of the gas can be obtained from the localutility company.

For Propane Gas: The only check for the furnace rate is toproperly adjust the manifold pressure using a manometerand the information provided in Table 12. Typical manifoldset point for installations at altitudes from 0 to 4500 feetabove sea level is 10.0" W.C.

Temperature RiseCheck the temperature rise and, if necessary, adjust blowerspeed to maintain temperature rise within the range shownon the unit rating plate.

High AltitudeIn both the United States and Canada, this furnace isapproved for operation at altitudes from 0 to 4500 feet abovesea level without any required modifications. From 4500 to7500 feet, the gas manifold pressure needs to be adjusted

For Natural Gas: Check the furnace rate by observing thegas meter, when available, making sure all other gasappliances are turned off. The test hand on the meter shouldbe timed for at least one revolution. Note the number ofseconds for one revolution.

according to the information shown in Table 12. To adjustthe manifold pressure, refer to previous section Checkingand Adjusting Gas Input. For installations above 7500feet, call Technical Service at 1-800-515-3501 for assistance.

For installations above 4500 feet fill in the appropiateinformation on the furnace label that has the words “Thisfurnace was converted on . . . . . . “.

Emergency Replacement Motor OperationIf the variable speed motor needs to be replaced in anemergency situation (such as “no heat”) and an exactreplacement motor is not immediately available, a standardPSC motor of equivalent frame size, voltage, rotation, andhorsepower can be temporarily installed until the correctreplacement motor can be obtained.

Connect the desired speed tap to the “EAC” terminal and theneutral tap to the neutral terminal on the ignition control (referto the furnace wiring diagram). T he ignition control will controlthe motor’s operation, including a nominal 20 second “on” delaywith a call for heat and a nominal 180 second “off” delay whenthe thermostat is satisfied. It will also operate the motor on acall for cooling, with no “on” or “off” delays.

Verify that the unit is operating at the desired speed andwithin the rise range as shown on the unit rating plate.

The correct replacement motor must be installed assoon as possible to ensure continued satisfactoryoperation of the furnace.

x 3600 x= Cubic Feet Per RevolutionBTU/HR INPUT # Seconds Per Revolution

HeatingValue

MANIFOLD PRESSURE SETTINGS

Table 12

* Consult local utility for actual heating value.Furnace input = Input Factor x Nameplate InputNOTE: A natural to LP/Propane gas changeover kit is necessary to convert this unit. Refer to the changeover kit installation instruction for theconversion procedure.

506471-01 of 41Issue 1034

It is recommended that this furnace be inspected by aqualified service technician at the beginning of each heatingseason.

FiltersFilters should be checked at least every 6 weeks. Disposablefilters should be replaced when dirty, and cleanable filtersshould be cleaned regularly. It is important to keep the air filtersclean, as dirty filters can restrict airflow and the blower andinduced draft motors depend upon sufficient air flowing acrossand through them to keep from overheating.

BurnersLight the burners and allow to operate for a few minutes toestablish normal burning conditions. Observe the burnerflames. Compare this observation to Figure 39 to determine ifproper flame adjustment is present. Flame should bepredominantly blue in color and strong in appearance. Checkthat all burners are lit, and that the flame does not impinge onthe sides of the heat exchanger.

Distorted flame or yellow tipping of the natural gas burnerflame, or long yellow tips on propane, may be caused by lintaccumulation or dirt inside the burner or burner ports, at theair inlet between the burner and manifold pipe, orobstructions over the burner orifice.

Use a soft brush or vacuum to clean the affected areas.

MAINTENANCE

Failure to follow the safety warnings exactly could resultin dangerous operation, serious injury, death, or propertydamage.

Improper servicing could result in dangerous operation,serious injury, death, or property damage.

• Before servicing, disconnect all electrical power tofurnace.

• When servicing controls, label all wires prior todisconnecting. Reconnect wires correctly.

• Verify proper operation after servicing.

WARNINGELECTRICAL SHOCK, FIRE,

OR EXPLOSION HAZARD

LubricationThe blower motor and induced draft motor are pre-lubricatedby the manufacturer and do not require further lubricatingattention. However, the motors should be cleanedperiodically to prevent the possibility of overheating due toan accumulation of dust and dirt on the windings or on themotor exterior.

Typical Flame Appearance

Figure 39

HeatExchanger

BurnerFlame

(Blue Only)

Burner

GasManifold

506471-01 of 41 Issue 1034

CONTROL DIAGNOSTICS

TroubleshootingMake the following visual checks before troubleshooting:

1. Check to see that the power to the furnace and theintegrated ignition/blower control board is ON.

2. The manual shutoff valves in the gas line to the furnacemust be open.

3. Make sure all wiring connections are secure.

4. Review the Sequence of Operation (see page 31).

Start the system by setting thermostat above roomtemperature. Observe system response. Then use theinformation provided in this section to check the systemoperation.

The furnace has a built-in, self-diagnostic capability. If asystem problem occurs, a fault code is shown by a red LEDon the control board. The control continuously monitors itsown operation and the operation of the system. If a failureoccurs, the LED will indicate the failure code. The flashcodes are presented in Table 13

Fault Code History ButtonThe control stores the last five fault codes in memory. Apushbutton switch is located on the control (see Figure 40on page 38). When the pushbutton switch is pressed andreleased, the control flashes the stored fault codes. Themost recent fault code is flashed first; the oldest fault codeis flashed last. To clear the fault code history, press andhold the pushbutton switch in for more than 5 seconds beforereleasing.

High Heat State LEDOn A80UH2V and 80G1UH2V models, a green LED isprovided on the control board to indicate high heat state(see Table 14).

CFM LEDOn A80UH2V and 80G1UH2V models equipped with avariable speed motor, an amber LED is provided on thecontrol board to display CFM. To determine what CFM themotor is delivering at any time, count the number of timesthe amber LED flashes. Each flash signifies 100 CFM; countthe flashes and multiply by 100 to determine the actual CFMdelivered (for example: 10 flashes x 100 = 1000 CFM).

Failure Codes - Red LED

Table 13

LED Status Fault Description

LED Off

LED On

1 Flash Flame Present with gas valve off

2 FlashesPressure switch closed withinducer off

Normal operation

No power to control or controlhardware fault detected

3 FlashesLow-fire pressure, rollout, or auxlimit switch open

4 Flashes High limit switch open

5 Flashes Not used

6 Flashes Pressure switch cycle lockout

7 Flashes Lockout due to no ignition

8 FlashesLockout due to too many flamedropouts

9 Flashes Incorrect polarity and phasing

High Heat State - Green LED

Table 14

LED

StatusDescription

LED Off

LED On

LED Flashing

No demand for high heat

High heat demand, operating

normally

High heat demand, high pressure

switch not closed

506471-01 of 41Issue 1034

Control GroupTransformerHigh limit controlAuxiliary limitGas valveIntegrated ignition/blower control boardFlame sensorPressure switches – 1st stage and 2nd stageBlower door interlock switchCombustion blower assemblyFlame rollout protector switchHot surface igniterInput choke

REPAIR PARTSThe following repair parts are available from the local distributor. When ordering parts, include the complete furnace modelnumber and serial number which are printed on the rating plate located on the furnace.

Heat Exchanger GroupHeat exchanger

Blower GroupBlower housing assemblyBlower wheelBlower mountBlower motorBlower motor mount

Burner GroupGas manifoldBurner orificesBurners

506471-01 of 41 Issue 1034

Wiring Diagram

5 A

MP

IGNITION CONTROL

TRANSFORMER

INDUCEDDRAFT

BLOWER

INTERLOCKSWITCH

122 1

C HI

GAS VALVE

M

MAINLIMIT

12 9 6 3

11 8 5 2

10 7 4 1

33

120V

24V

HOTNEUTRALGROUND

120/1/60

12345

BLK

RE

DW

HT

WH

TR

ED

BLK

5-PINCONNECTOR

WHT

YELYEL

WHT

BLU

OR

NR

ED

/BLK

RE

DW

HT

YEL

VLT

BR

NG

RY

BLK

BLK/WHT

WHT

RED/BLK

YE

LY

EL

BLK

WH

T

ORNBLUGRY

GR

N

WHT/BLKRED

BRN

221

12-PINCONNECTOR

FLAMESENSOR

IGNITER

S1P1

AUX LIMITSWITCH

VLT

VLT

PRESSURESWITCH(HIGH)

VLT VLTVLT

BR

N

BRN

WHT

CIRCULATIONBLOWER 5-PIN

CONNECTOR

1 2 4 53

INPUT CHOKE(IF USED)

BLK

GRN

WHT

BLK

YC GRW1W2

W2 GRYW1THERMOSTAT CONDENSER

LIN

EE

AC

XF

MR

CIR

C

HU

M

HU

M

XF

MR

LIN

E

PAR

K 1

CO

OL

EA

C

HI H

EAT

LO H

EAT

NE

UT

RA

L

HOT

CO

NT

PAR

K 2

DE

HU

M

OY2

C

BRNTYP

LINE VOLTAGE - FACTORY

LINE VOLTAGE - FIELD

LOW VOLTAGE - FACTORY

LOW VOLTAGE - FIELD

PRESSURESWITCH(LOW)

PRESSURESWITCH -

DRAIN(IF USED)

ROLLOUTSWITCH

(IF USED)ROLLOUTSWITCH

NONE

105

P5

AUX LIMITSWITCH

(IF USED)

WH

T/B

LK

SW1

GREEN LEDRED LED

AMBER LED

FAULT CODEHISTORYBUTTON

(SEE NOTE 1)

AUTOMATICHEAT STAGING

JUMPER

NOTES:

1. PRESS AND RELEASE FAULT CODE HISTORY BUTTON TODISPLAY FAULT CODES. TO ERASE CODES, PRESS AND HOLDBUTTON IN FOR MORE THAN 5 SECONDS

2. IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE FURNACE MUST BE REPLACED, IT MUST BE REPLACEDWITH WIRING MATERIAL HAVING A TEMP. RATING OF AT LEAST 90°C.

3. PROPER POLARITY MUST BE OBSERVED FOR FIELD LINE VOLTAGE SUPPLY; IGNITION CONTROL WILL LOCKOUT IF POLARITY IS REVERSED.

4. FOR TEMPORARY SERVICE REPLACEMENT OF CIRCULATING BLOWER MOTOR WITH PSC MOTOR, CONNECTDESIRED SPEED TAP TO “EAC” TERMINAL AND NEUTRAL TAP TO NEUTRAL TERMINAL ON IGNITION CONTROL.

5. DO NOT CONNECT C (COMMON) CONNECTION BETWEEN INDOOR UNIT AND THERMOSTAT EXCEPT WHENREQUIRED BY THE INDOOR THERMOSTAT. REFER TO THE THERMOSTAT INSTALLATION INSTRUCTIONS.

Figure 40

506471-01 of 41Issue 1034

Typical Field Wiring Diagram

Figure 41

506471-01 of 41 Issue 1034

START-UP & PERFORMANCE CHECK LIST

UNIT SET UP

506471-01 of 41Issue 1034

UNIT OPERATION

INSTALLATION INSTRUCTIONS A80UH2V & 80G1UH2V...Ventilation Air in a confined space with air from...

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