Installer's Guide - Upflow/ Horizontal and Downflow ......ANSI Z221.1/NFPA 54 and/or CSA B149.1 Natural Gas and Propane Installation Code. 9. After it has been determined that each

ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES

IMPORTANT — This Document is customer property and is to remain with this unit.Please return to service information pack upon completion of work.

Installer’s Guide

*__First letter may be “A” or “T”

Upflow / Horizontal and Downflow / Horizontal,Gas-Fired, Direct Vent, 2-Stage CondensingFurnaces with Variable Speed Inducer

A341624P11© 2011 Trane All Rights Reserved

UPFLOW

*UH2

UPFLOW/HORIZONTAL

*DH2

DOWNFLOW

DOWNFLOW/HORIZONTAL

Figure 1

1 8 - CD2 6 D1 - 1 3Available in French Canadian (FC)

*UH2B060A9V3VA*UH2B080A9V3VA*UH2B080A9V4VA*UH2C100A9V4VA

*UH2C100A9V5VA*UH2D120A9V5VA*DH2B060A9V3VA*DH2B080A9V3VA

*DH2B080A9V4VA*DH2C100A9V4VA*DH2D120A9V5VA

2 18-CD26D1-13

Installer’s GuideSAFETY SECTION

▲ WARNING!FIRE OR EXPLOSION HAZARDFAILURE TO FOLLOW THE SAFETY WARNINGS EXACTLYCOULD RESULT IN SERIOUS INJURY, DEATH OR PROP-ERTY DAMAGE.IMPROPER SERVICING COULD RESULT IN DANGEROUSOPERATION, SERIOUS INJURY, DEATH, OR PROPERTYDAMAGE.

▲ CAUTION!To prevent shortening its service life, the Furnace should notbe used as a “Construction Heater” during the finishingphases of construction until the requirements listed in item9, a-g of the safety section of this publication have been met.Condensate in the presence of chlorides and fluorides frompaint, varnish, stains, adhesives, cleaning compounds, andcement create a corrosive condition which may cause rapiddeterioration of the heat exchanger.

▲ WARNING!FIRE & EXPLOSIVE HAZARD. DO NOT USE SEMI-RIGIDMETALLIC GAS CONNECTORS (FLEXIBLE GAS LINES)WITHIN THE FURNACE CABINET.FAILURE TO FOLLOW THIS WARNING COULD RESULT INPROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

CARBON MONOXIDE POISONING HAZARD

Failure to follow the steps outlined below for each appliance connected to the venting system being placed into operation could result in carbon monoxide poisoning or death.

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

1. Seal any unused openings in the venting system.

2. Inspect the venting system for proper size and horizontal pitch, as required in the National Fuel Gas Code, ANSI Z223.1/NFPA 54 or the CSA B149.1 Natural Gas and Propane Installation Code and these instructions. Determine that there is no blockage or restriction, leakage, corrosion and other deficiencies which could cause an unsafe condition.

3. As far as practical, close all building doors and windows and all doors between the space in which the appliance(s) connected to the venting system are located and other deficiencies which could cause an unsafe condition.

4. Close fireplace dampers.

5. Turn on clothes dryers and any appliance not connected to the venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they are operating at maximum speed. Do not operate a summer exhaust fan.

6. Follow the lighting instructions. Place the appliance being inspected into operation. Adjust the thermostat so appliance is operating continuously.

7. Test for spillage from draft hood equipped appliances at the draft hood relief opening after 5 minutes of main burner operation. Use the flame of a match or candle.

8. If improper venting is observed during any of the above tests, the venting system must be corrected in accordance with the National Fuel Gas Code, ANSI Z221.1/NFPA 54 and/or CSA B149.1 Natural Gas and Propane Installation Code.

9. After it has been determined that each appliance connected to the venting system properly vents where

when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas-fired burning appliance to their previous condition of use.

▲ WARNING!

Failure to follow safety warnings exactly, could result in a fire or explosion causing property damage, personal injury or loss of life.

— Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

— WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch;do not use any phone in your building.

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

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

— Installation and service must be performed by a qualified installer, service agency or the gas supplier.

▲ WARNING!

▲▲ WARNING!HAZARD OF EXPLOSION! NEVER USE AN OPEN FLAME TO DETECT GAS LEAKS. EXPLOSIVE CONDITIONS MAY OCCUR. USE A LEAK TEST SOLUTION OR OTHER APPROVED METHODS FOR LEAKTESTING. FAILURE TO FOLLOW RECOMMENDED SAFE LEAKTEST PROCEDURES COULD RESULT IN DEATH OR SERIOUSINJURY OR EQUIPMENT OR PROPERTY-ONLY-DAMAGE.

▲ WARNING!SAFETY HAZARDTHIS INFORMATION IS INTENDED FOR USE BY INDIVIDU-ALS POSSESSING ADEQUATE BACKGROUNDS OFELECTRICAL AND MECHANICAL EXPERIENCE. ANYATTEMPT TO REPAIR A CENTRAL AIR CONDITIONINGPRODUCT MAY RESULT IN PERSONAL INJURY AND ORPROPERTY DAMAGE. THE MANUFACTURER OR SELLERCANNOT BE RESPONSIBLE FOR THE INTERPRETATION OFTHIS INFORMATION, NOR CAN IT ASSUME ANY LIABILITYIN CONNECTION WITH ITS USE.

▲ CAUTION!Sharp Edge Hazard. Be careful of sharp edges on equip-ment or any cuts made on sheet metal while installing orservicing. Personal injury may result.

18-CD26D1-13 3

Installer’s GuideCareful consideration must be taken in the installationprocess to avoid personal injury, property damage or equip-ment damage. These instructions do not cover all variationsin systems or provide for every possible contingency. Shouldfurther information be desired or particular problems arisewhich are not covered sufficiently by this manual, contact yourlocal distributor or the manufacturer as listed on the Furnacenameplate.In addition, these Furnaces are suitable for installation in anattic, garage or crawl space with ducted supply and return air.

Safety signal words are used to designate a degree or level ofseriousness associated with a particular hazard. The signalwords for safety markings are WARNING, and CAUTION.

a. WARNING indicates a potentially hazardous situationwhich, if not avoided, could result in death or seriousinjury.

b. CAUTION indicates a potentially hazardous situationwhich, if not avoided, may result in minor or moderateinjury. It is also used to alert against unsafe practicesand hazards involving only property damage.

▲ WARNING!

The following warning complies with State of California law, Proposition 65.

This product contains fiberglass wool insulation!

Fiberglass dust and ceramic fibers are believed by the State of California to cause cancer through inhalation. Glasswool fibers may also cause respiratory, skin, or eye irritation.

PRECAUTIONARY MEASURES

● Avoid breathing fiberglass dust.

● Use a NIOSH approved dust/mist respirator.

● Avoid contact with the skin or eyes. Wear long-sleeved, loose-fitting clothing, gloves, and eye protection.

● Wash clothes separately from other clothing: rinse washer thoroughly.

● Operations such as sawing, blowing, tear-out, and spraying may generate fiber concentrations requiring additional respiratory protection. Use the appropriate NIOSH approved respirator in these situations.

FIRST AID MEASURES

Eye Contact – Flush eyes with water to remove dust. If symptoms persist, seek medical attention.

Skin Contact – Wash affected areas gently with soap and warm water after handling.

▲▲ WARNING!WARNING EXPLOSION HAZARDPROPANE GAS IS HEAVIER THAN AIR AND MAY COLLECT IN ANY LOW AREAS OR CONFINED SPACES. IN ADDITION, ODORANT FADE MAY MAKE THE GAS UNDETECTABLE EXCEPT WITH A WARNING DEVICE. IF THE GAS FURNACE IS INSTALLED IN A BASEMENT, AN EXCAVATED AREA OR A CONFINED SPACE, IT IS STRONGLY RECOMMENDED TO CONTACT A GAS SUPPLIER TO INSTALL A GAS DETECTING WARNING DEVICE IN CASE OF A GAS LEAK. THE MANUFACTURER OF YOUR FURNACE DOES NOT TEST ANY DETECTORS AND MAKES NO REPRESENTATIONS REGARDING ANY BRAND OR TYPE OF DETECTOR.

4 18-CD26D1-13

Installer’s Guide

Safety Section 2

Installation Instructions 5General 5Location and Clearances 5Outline Drawings 6Upflow Installation 8Downflow Installation 8Horizontal Installation 8Air For Combustion and Ventilation 9Duct Connections 10Return Air Filters 11General Venting 15Vent Tables 19Horizontal Venting 20Horizontal Venting Through a Wall 21Venting Through The Roof 23Venting Routed Through a Masonry Chimney 24Downward Venting 26Condensate Drain Instructions 27Gas Piping 32Combustion and Input Check 32High Altitude Derate 35Electrical Connections 36Field Wiring Diagrams 36

Start-up and Adjustment 41Preliminary Inspections 41Lighting Instructions 41Sequence of Operation 41Control and Safety Switch Adjustments 42

Conditions Affecting System Operation 43

IFC Error Flash Codes 44

ContentsThe following safety practices and precautions must befollowed during the installation, servicing, and operation ofthis Furnace.

1. Use only with the type of gas approved for this Furnace.Refer to the Furnace rating plate.

2. Install this Furnace only in a location and position asspecified in “Location and Clearances” (page 5) of theseinstructions.

3. Provide adequate combustion and ventilation air to theFurnace space as specified in “Air for Combustion andVentilation” (page 9), of these instructions.

4. Combustion products must be discharged outdoors.Connect this Furnace to an approved vent system only, asspecified in the “Venting” section (page 15), of theseinstructions.

5. Never test for gas leaks with an open flame. Use acommercially available soap solution made specificallyfor the detection of leaks to check all connections, asspecified in the “Gas Piping” section of these instructionson page 31.

6. Always install the Furnace to operate within theFurnace’s intended temperature-rise range with a ductsystem which has an external static pressure within theallowable range, as specified on the unit rating plate.Airflow with temperature rise for cfm versus static isshown in the Service Facts accompanying this Furnace.

7. When a Furnace is installed so that supply ducts carryair circulated by the Furnace to areas outside the spacecontaining the Furnace, the return air shall also behandled by a duct(s) sealed to the Furnace casing andterminating outside the space containing the Furnace.

8. A gas-fired Furnace for installation in a residentialgarage must be installed as specified in “Location andClearances” section (page 5) , of these instructions.

9. The Furnace may be used for temporary heating ofbuildings or structures under construction only when thefollowing conditions have been met:

a. The Furnace venting system must be complete andinstalled per manufacturers instructions.

b. The Furnace is controlled only by a room ComfortControl (no field jumpers).

c. The Furnace return air duct must be complete andsealed to the Furnace.

d. The Furnace input rate and temperature rise mustbe verified to be within nameplate marking.

e. 100% of the Furnace combustion air requirementmust come from outside the structure.

f. The Furnace return air temperature range is be-tween 550 and 800 Fahrenheit.

g. Clean the Furnace, duct work, and components uponsubstantial completion of the construction process, andverify Furnace operating conditions including ignition,input rate, temperature rise and venting, according to themanufacturer's instructions.

10. This product must be gas piped by a Licensed Plumber orGas Fitter in the Commonwealth of Massachusetts.

18-CD26D1-13 5

Installer’s GuideGENERAL INSTALLATION INSTRUCTIONSThe manufacturer assumes no responsibility for equipmentinstalled in violation of any code or regulation.

It is recommended that Manual J of the Air ConditioningContractors Association (ACCA) or A.R.I. 230 be followed inestimating heating requirements. When estimating heatingrequirements for installation at Altitudes above 2000 ft.,remember the gas input must be reduced (See combustionand input check page 31).

Material in this shipment has been inspected at thefactory and released to the transportation agencywithout known damage. Inspect exterior of carton forevidence of rough handling in shipment. Unpackcarefully after moving equipment to approximatelocation. If damage to contents is found, report thedamage immediately to the delivering agency.

Codes and local utility requirements governing the installa-tion of gas fired equipment, wiring, plumbing, and flueconnections must be adhered to. In the absence of local codes,the installation must conform with latest edition of theNational Fuel Gas Code ANSI Z223.1 • National InstallationCode, CAN/CGA B149.1. The latest code may be obtainedfrom the American Gas Association Laboratories, 400 N.Capitol St. NW, Washington D.C. 20001.1-800-699-9277 or www.aga.org.

These Furnaces have been classified as CATEGORY IVfurnaces in accordance with latest edition of ANSI Z21.47standards • CSA 2.3. Category IV furnaces operate withpositive vent static pressure and with a flue loss less than 17percent. These conditions require special venting systems,which must be gas tight and water tight. These Category IVDirect Vent Furnaces are approved for installation in Manu-factured/ Mobile housing when used with BAYMFGH001A.

LOCATION AND CLEARANCES

▲ WARNING!FIRE HAZARD. DO NOT INSTALL THE FURNACE DIRECTLYON CARPETING, TILE OR OTHER COMBUSTIBLE MATE-RIAL OTHER THAN WOOD FLOORING.

▲ CAUTION!Do NOT install the Furnace in a corrosive or contaminatedatmosphere.Failure to follow this caution could result in early equipmentfailure.

The location of the Furnace is normally selected by thearchitect, the builder, or the installer. However, before theFurnace is moved into place, be sure to consider the followingrequirements:

1. Is the location selected as near the chimney or vent andas centralized for heat distribution as practical?

2. Do all clearances between the Furnace and enclosureequal or exceed the minimums stated in Clearance Tableon the Outline Drawings?

3. Is there sufficient space for servicing the Furnace andother equipment? A minimum of 24 inches front accessi-bility to the Furnace must be provided. Any access dooror panel must permit removal of the largest component.

4. Are there at least 3 inches of clearance between theFurnace combustion air openings in the front panel andany closed panel or door provided?

5. Are the ventilation and combustion air openings largeenough and will they remain unobstructed? If outside airis used, are the openings set 12" above the highest snowaccumulation level (18" minimum in Canadian applica-tions)?

6. Allow sufficient height in supply plenum above theFurnace to provide for cooling coil installation, if thecooling coil is not installed at the time of this Furnaceinstallation.

IMPORTANT: The Furnace must be installed level.The only allowable variation would be slightly tothe left and/ or forward in upflow installations orslightly toward the front in horizontal installations.This is necessary for proper condensate drainage.

7. A Furnace shall be installed so electrical components areprotected from water.

8. If the Furnace is installed in a garage, it must beinstalled so that the burners, and the ignition source arelocated not less than 18 inches above the floor and theFurnace must be located or protected to avoid physicaldamage from vehicles.

6 18-CD26D1-13

Installer’s GuideFi

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18-CD26D1-13 7

Installer’s GuideFi

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8 18-CD26D1-13

Installer’s Guide

The bottom panel of the upflow furnace must be removed forbottom return air.Remove the filter and lay the furnace on its back. Remove thetwo 5/16" hex screws securing the bottom front channel to thecabinet. Lower the front edge of the bottom front channel andpull forward to remove the channel. The bottom return airpanel will now easily slide out of the cabinet. Reinstall thebottom front channel and filter for upflow bottom returninstallations.

UPFLOW INSTALLATIONStandoffs and screws (See Figure 4) are included with thecased coils for attachment to the Furnace. There are clear-ance alignment holes near the bottom of the coil wrapper.Drill screws are used to engage the Furnace top flanges. Thestandoff is inserted into the cabinet alignment hole. The drillscrews are inserted through the standoffs then screwed intothe Furnace flange. The coil is always placed downstream ofthe Furnace airflow. The above instructions apply only if thecoil is on top of an upflow Furnace

DOWNFLOW INSTALLATION

HORIZONTAL INSTALLATIONThe coil and Furnace must be fully supported when used inthe horizontal position. It is always recommended that anauxiliary drain pan be installed under a horizontally in-stalled evaporator coil or 90% Gas Furnace. Connect theauxiliary drain line to a separate drain line (no trap is neededin this line).Three brackets (with screws) are included with downflowfurnaces for installtion to stabilize and secure the 2/4TXCcased coil in the horizontal position. See Figure 8.The cased coil is secured to the Furnace. The brackets mountusing the rear screws on the coil case. Use the screws providedto secure the bracket to the Furnace. The remaining bracketis placed as close to horizontal center as possible between thecoil and the Furnace, converted to horizontal, aligns andattaches to the TXC coil. The Furnace and the cased coil must be properly supported.

The Furnace may be installed in an attic or crawl space in thehorizontal position by placing the Furnace on the left side (asviewed from the front in the vertical position). The horizontalFurnace installation in an attic should be on a serviceplatform large enough to allow for proper clearances on allsides and service access to the front of the Furnace (SeeFigure 6 & Table 1). Line contact is only permissible betweenlines formed by intersections of the top and two sides of thefurnace casing and building joists, studs, or framing.The Furnace may be placed horizontally in a crawl space on apad or other noncombustible material which will raise theunit for sufficient protection from moisture.

The Furnace must be supported at both ends and themiddle when installed horizontally. The Furnace mustalso be elevated approximately 4-6 inches to allowclearance for the condensate drain to exit the cabinet inthe horizontal position.

▲ WARNING!FIRE HAZARD. DO NOT INSTALL THE FURNACE DIRECTLYON CARPETING, TILE OR OTHER COMBUSTIBLE MATE-RIAL OTHER THAN WOOD FLOORING. FOR VERTICALDOWNFLOW APPLICATION, SUBBASE (BAYBASE205)MUST BE USED BETWEEN THE FURNACE AND COMBUS-TIBLE FLOORING. WHEN THE DOWNFLOW FURNACE ISINSTALLED VERTICALLY WITH A CASED COIL, A SUB-BASE IS NOT REQUIRED.

Table 1 Required floor opening: (DOWNFLOW)

CABINETWIDTH

RETURNDUCT WIDTH

FLOOR OPENING PLENUM OPENING"A" "B" "C" "D"

17-1/2" 16-1/4" 16-5/8" 20-1/8" 15-5/8" 19-3/8"21" 19-3/4" 20-1/8" 20-1/8" 19-1/8" 19-3/8"

24-1/2" 23-1/4" 23-5/8" 20-1/8" 22-5/8" 19-3/8"

INSTALLATION INSTRUCTIONS

Figure 5

UPFLOWFURNACE

CASEDCOIL

SCREWS(BOTH SIDES)

STANDOFFS(BOTH SIDES)

STANDOFFS (4) DRILL SCREWS (4)

FOR VERTICAL

Figure 4

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FURNACEFRONT

A (width)B (depth)

CD

Figure 6

MINIMUM CLEARANCE FROM COMBUSTIBLE MATERIALS FORUPFLOW/HORIZONTAL AND DOWNFLOW/ HORIZONTAL FURNACES

UNIT LOCATION

FURNACE SURFACE VERTICALCLOSET

HORIZONTALCLOSET

HORIZONTALALCOVE / ATTIC

SIDES 0" 1" 0"BACK 0" 3" 6"TOP 1" 1" 1"

FRONT 3" 3" 18"VENT 0" 0" 0"

NOTE: CLEARANCE REQUIRED AT TOP OF PLENUM IS 1"

Table 2IMPORTANT:The 2/4TXC cased coil mustbe placed downstream of thefurnace. In horizontal instal-lations, the apex of the coilmay point either toward oraway from the furnace. Seethe 2/4TXC coil Installer'sGuide for more details.

18-CD26D1-13 9

Installer’s Guide

Adequate flow of combustion and ventilating air must not beobstructed from reaching the Furnace. Air openings providedin the Furnace casing must be kept free of obstructions whichrestrict the flow of air. Airflow restrictions affect the efficiencyand safe operation of the Furnace. Keep this in mind shouldyou choose to remodel or change the area which contains yourFurnace. Furnaces must have a free flow of air for properperformance.

Provisions for combustion and ventilation air shall be madein accordance with “latest edition” of Section 5.3, Air forCombustion and Ventilation, of the National Fuel Gas Code,ANSI Z223.1, or Sections 7.2, 7.3 or 7.4 of CSA B149.1Installation Codes, and applicable provisions of the localbuilding codes. Special conditions created by mechanicalexhausting of air and fireplaces must be considered to avoidunsatisfactory Furnace operation.

Confined spaces are installations with less than 50 cu. ft. ofspace per 1000 BTU/ hr input from all equipment installed.Confined space is defined in Figure 10. Air for combustionand ventilation requirements can be supplied from inside thebuilding as in Figure 11 or from the outdoors, as in Figure 12.

3. The following types of installations will require use ofOUTDOOR AIR for combustion, due to chemicalexposures:* Commercial buildings* Buildings with indoor pools* Furnaces installed in commercial laundry rooms* Furnaces installed in hobby or craft rooms

Unconfined space is defined in Table 3 and Figure 9. Thesespaces may have adequate air by infiltration to provide airfor combustion, ventilation, and dilution of flue gases.Buildings with tight construction (for example, weatherstripping, heavily insulated, caulked, vapor barrier, etc.), mayneed additional air provided as described for confined space.

1.All air from inside the building as in Figure 11: The con-fined space shall be provided with two permanentopenings communicating directly with an additionalroom(s) of sufficient volume so that the combined volumeof all spaces meets the criteria for an unconfined space.The total input of all gas utilization equipment installedin the combined space shall be considered in making thisdetermination. Refer to Table 4, for minimum openareas required.

2. All air from outdoors as in Figure 12: The confined spaceshall be provided with two permanent openings, onecommencing within 12 inches of the top and one com-mencing within 12 inches of the bottom of the enclosure.

The openings shall communicate directly, or by ducts,with the outdoors or spaces (crawl or attic) that freelycommunicate with the outdoors. Refer to Table 4, forminimum open areas required.

The horizontal Furnace may also be suspended from thejoists using all-thread rods with a substantial metal supportframe that supports the entire length of the furnace. Therods need to be of sufficient length to allow for proper clear-ances from combustible materials. The frame needs to be atleast 32" in length to allow for access to service panels.

If the Furnace is suspended using steel strap, it must besupported at all four corners and in the middle at the front ofthe Furnace.

UPFLOW/HORIZONTALSHOWN WITHDIRECT VENT

Figure 7

MINIMUM AREA IN SQUARE FEETFOR UNCONFINED SPACE INSTALLATIONS

FURNACEMAXIMUM BTUHINPUT RATING

WITH 8 FT. CEILINGMINIMUM AREA IN SQUARE

FEET OF UNCONFINED SPACE

60,00080,000100,000120,000140,000

375500625750875

Table 3

Table 4MINIMUM FREE AREA IN SQUARE INCHES

EACH OPENING (FURNACE ONLY)

FurnaceMaximum

BTUH/INPUTRating

AirFromInside

Air From Outside

Vertical Duct

Horizontal Duct

60,00080,000100,000120,000140,000

100100100120140

1520253035

3040506070

The following warning complies with State of California law, Proposition 65.

HAZARDOUS GASES!EXPOSURE TO FUEL SUBSTANCES OR BY-PRODUCTS OF INCOMPLETE FUEL COMBUSTION IS BELIEVED BY THE STATE OF CALIFORNIA TO CAUSE CANCER,BIRTH DEFECTS, OR OTHER REPRODUCTIVE HARM.

▲ WARNING!

AIR FOR COMBUSTION AND VENTILATION

Furnace locations may be in a confined space (see Figure 10)or an unconfined space (See Figure 9).

CASED COIL CONNECTIONBRACKET FOR DOWNFLOWFURNACE IN HORIZONTAL

DOWNFLOW ONLYFigure 8

50 CU. FT. OR MOREPER 1000 BTU/ HR. INPUTALL EQUIP. INSTALLED

UNCONFINED

Figure 9

CONFINED

LESS THAN 50 CU. FT.PER 1000 BTU/HR. INPUTALL EQUIP INSTALLED

Figure 10

10 18-CD26D1-13

Installer’s Guide

DUCT CONNECTIONS

▲▲ CAUTION!SAFETY HAZARDSharp Edge Hazard. Be careful of sharp edges on equip-ment or any cuts made on sheet metal while installing or servicing. Personal injury may result.

Air duct systems should be installed in accordance withstandards for air conditioning systems, National FireProtection Association Pamphlet No. 90. They should besized in accordance with ACCA Manual D.

Central Furnaces, when used in connection with cooling units,shall be installed in parallel or on the upstream side of thecooling coil to avoid condensation in the heat exchanger. With aparallel flow arrangement, the dampers or other means used tocontrol flow of air shall be adequate to prevent chilled air fromentering the Furnace, and if manually operated, must beequipped with means to prevent operation of either unit unlessthe damper is in full heat or cool position.

Flexible connections of nonflammable material may be used forreturn air and discharge connections to reduce the transmissionof vibration. Though these units have been specifically designedfor quiet, vibration free operation, air ducts can act as soundingboards and could, if poorly installed, result in vibration to theannoyance level.

When the Furnace is located in a utility room adjacent to theliving area, the system should be carefully designed withreturns to minimize noise transmission through the returnair grille. Although these Furnaces are designed with largeblowers operating at moderate speeds, any blower moving ahigh volume of air will produce audible noise which could beobjectionable when the unit is located very close to a livingarea. It is often advisable to route the return air ducts underthe floor or through the attic. Such design permits theinstallation of air return remote from the living area (i.e.central hall).

When the Furnace is installed so that the supply ducts carryair circulated by the Furnace to areas outside the spacecontaining the Furnace, the return air shall also be handledby a duct(s) sealed to the Furnace and terminating outsidethe space containing the Furnace.

* Furnaces installed near chemical storage areas.

Exposure to the following substances in the combus-tion air supply will also require OUTDOOR AIR forcombustion:* Permanent wave solutions* Chlorinated waxes and cleaners* Chlorine based swimming pool chemicals* Water softening chemicals* Deicing salts or chemicals* Carbon Tetrachloride* Halogen type refrigerants* Cleaning solvents (such as perchloroethylene)* Printing inks, paint removers, varnish, etc.* Hydrochloric acid* Cements and glues* Antistatic fabric softeners for clothes dryers* Masonry acid washing materials

NOTE: Extended warranties are not available in someinstances. Extended warranty does not cover repairs toequipment installed in establishments with corrosiveatmospheres, including but limited to, dry cleaners, beautyshops, and printing facilities.

Figure 11

Figure 12

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Installer’s Guide

Carbon monoxide, fire or smoke can cause serious bodilyinjury, death, and/or property damage.A variety of potential sources of carbon monoxide can be foundin a building or dwelling such as gas-fired clothes dryers, gascooking stoves, water heaters, furnaces and fireplaces. TheU.S. Consumer Product Safety Commission recommendsthat users of gas-burning appliances install carbon monoxidedetectors as well as fire and smoke detectors per the manu-factures installation instructions to help alert dwellingoccupants of the presence of fire, smoke or unsafe levels ofcarbon monoxide. These devices should be listed by Under-writers Laboratories, Inc. Standards for Single and MultipleStation Carbon Monoxide Alarms, UL 2034 or CSA Interna-tional Standard, Residential Carbon Monoxide AlarmingDevices, CSA 6.19.

NOTE: The manufacturer of your Furnace DOES NOT testany detectors and makes no representations regarding anybrand or type of detector.

All return air duct systems should provide for installation ofreturn air filters.

PREPARATION FOR UPFLOW BOTTOM AND SIDE RETURNAIR FILTER INSTALLATION

All return air duct systems should provide for installation ofreturn air filters.

1. Determine the appropriate position to set the furnace inorder to existing supply and return ductwork.

2. The return air filter is shipped in either the bottom orside location. Remove the filter by first turning the twolatches on the blower door and tilting the door forward toremove. Remove the filter by sliding it out.

3. For upflow side return installations, remove the insulationaround the opening in the blower compartment.

4. The side panels of the upflow furnace include locatingnotches that are used as guides for cutting an opening forreturn air, refer to Figure 13 and the outline drawing onpage 6 for duct connection dimensions for variousfurnaces.

5. If a 3/4" flange is to be used for attaching the air inletduct, add to cut where indicated by dotted lines inFigure 13. Cut corners diagonally and bend outward toform flange.

6. If flanges are not required, and a filter frame is installed,cut between locating notches (See Figure 13).

7. The bottom panel of the upflow furnace must be removedfor bottom return air. After removing the filter, lay thefurnace on its back. Remove the two 5/16" hex screwssecuring the front of the bottom channel to the cabinet.Rotate the channel downward (or remove by lowering thefront edge of the channel and pulling forward).

Return Air FiltersTYPICAL UPFLOW RETURN AIR FILTER INSTALLATIONSFilters are factory supplied for these furnaces. These fur-naces require high velocity type air filters. The filters may beinstalled within the furnace blower compartment for UP-FLOW furnaces in either a BOTTOM or SIDE (left side orright side) return air inlet. Some filters may need to betrimmed for side or bottom filter use.

Table 5

MODELSNUMBERS

CABINET WIDTH

FILTERQTY & SIZE

*UH2B060A9V3VA*UH2B080A9V3VA*UH2B080A9V4VA

17-1/2" 1 - 17" X 25" X 1"

*UH2C100A9V4VA*UH2C100A9V5VA 21" 1 - 20" X 25" X 1"

*UH2D120A9V5VA 24-1/2" 1 - 24" X 25 X 1" *First letter may be "A" or "T"**NOTE: For upflow 5 ton airflow models where the airflow requirement exceeds 1800 CFM - Modles will require return air openings and filters on: (1) both sides, or (2) one side and the bottom, or (3) just on the bottom

NOTE: For upflow 5 ton airflow models where the airflowrequirement exceeds 1800 CFM - Models will require returnair openings and filters on: (1) both sides, or (2) one side andthe bottom, or (3) just the bottom.

UPFLOW FURNACE ONLY

*SEE OUTLINE DRAWING

FRONTof Furnace

LOCATINGNOTCHESPROVIDED FORSIDE RETURNCUTOUT

Figure 13

Where there is no complete return duct system, thereturn connection must be run full size from the Fur-nace to a location outside the utility room, basement,attic, or crawl space.Do Not install return air through the back of the Furnacecabinet.

Slide the bottom return air panel out of the cabinet.Rotate the front channel to its original position andreinstall the two 5/16” screws.

8. The horizontal installation of the upflow furnacerequires an external filter section. Do NOT use thebottom return filter within the furnace. Filter kitsare available for horizontal applications.

9. Connect duct work to furnace. See Outline Drawing forsupply and return duct size and location. Flexible ductconnectors are recommended to connect both supply andreturn air ducts to the furnace. If only the front of thefurnace is accessible, it is recommended that both supplyand return air plenums are removable.

12 18-CD26D1-13

Installer’s Guide

Blower Door Hinge and Bottom Filter Rack InstallationFigure 14

Filter Rack AssemblyFigure 15

VIEWENGAGEMENTHOLE DETAIL

(Typical both sidesand blower deck)

Blower DeckEngagement

Hole

Figure 16

FilterRackFurnace

CabinetSide

Filter RackRetainingScrew/Pin

Engagement Hole For

Bottom Return

Filter RackInstallation With

Figure 17

Airf low

ALTERNATE FILTER RACK INSTALLATION FOR BOTTOMRETURN - BAYRACK960

The following checklist should be used when installing areturn filter on an upflow furnace:

a. Remove the filter.

b. Remove the bottom panel.

c. With the filter removed, the filter rack is compressedand then inserted into the bottom of the furnace. Theretaining screw/pin on each side inserts into engagementholes at the bottom of the furnace cabinet side. SeeFigure 17.

d. Reinstall the furnace filter in the bottom position byinserting the chamfer end first into the filter rack.

ALTERNATE FILTER RACK INSTALLATION FOR SIDERETURN AIR ON UPFLOW FURNACES (Left or Right) -BAYRACK960

The following checklist should be used when installing a rightor left side return filter on an upflow furnace:

a. Remove the filter.

b. Leave the bottom panel in place.

c. Make side cutout by following the directions in the“Return Air Duct Connections” section on page 11.

d. Compress the filter rack and reinstall in the sideposition on the furnace. Confirm that the upperretaining pin/screw locks into the engagement hole inthe blower deck and the lower pin/screw rests againstthe side of the bottom panel. See Figures 16, 18-21.

e. Reinstall the furnace filter in the side position byinserting the chamfer end first into the filter rack.

Conversion kits for horizontal filters are BAYFLTR203 for 171/2" width cabinets, BAYFLTR204 for 21" width cabinets,and BAYFLTR205 for 24" width cabinets. These includefilters and brackets necessary for horizontal filters. Inaddition, optional door kit BAYFLTR206 is also available.See Figures 23 and 25.

The furnace and the bottom filter rack, BAYRACK960,installation can be seen in Figure 14.

18-CD26D1-13 13

Installer’s Guide

RETURN AIR FILTERS FOR UPFLOW FURNACE INHORIZONTAL CONFIGURATIONWhen the Upflow Furnace is installed in the horizontalconfiguration, the return air filters must be installed exteriorto the furnace cabinet. Remote filter grilles may be used forhomeowner convenience or the filters may be installed in theduct work upstream of the furnace. See Figure 23.

Airflow

BLOWERDECK

FilterRackAssembly

FurnaceBlowerDeck


Engagement Hole For

Return

Filter RackInstallation WithSide

FurnaceCabinet

Side

Figure 19

CHAMFEREND OF

FILTER GOESINTO FILTER RACK FIRST

Airf low

Figure 22

Typical Horizontal Filter Installation

Figure 23

BOTTOM ENGAGEMENT

Bottom Panel

FilterRack

FurnaceCabinet

Side


Engagement Hole For

Bottom Return

Filter RackInstallation With

Figure 18

Figure 21

RETAININGPIN

(Both Sides)

SPRINGS

SIDECUTOUT

FILTERRACKRAILS

BOTTOMPANEL

INSTALLED

AirflowAirflow

Typical Upflow Left Side Return Filter Rack Installation

RETAININGPIN

(Both Sides)

SPRINGS

SIDECUTOUT

FILTERRACKRAILS

BOTTOMPANEL

INSTALLED

AirflowAirflow

Typical Upflow Right Side Return Filter Rack Installation

Figure 20

Optional door kitBAYFLTR206

14 18-CD26D1-13

Installer’s GuideINSTALLING THE FILTERThe filter may need to be cut to fit the unit depending on thelocation of the return air filter.

A score line and the words “CUT HERE” are located on theend of the filter. If your application requires cutting the filter,do so as indicted by the score mark.

UNITSIZE

RETURN AIR

BOTTOM SIDE

17-1/2" DO NOT CUT DO NOT CUT

21" DO NOT CUT CUT ON LINE

24-1/2" DO NOT CUT CUT ON LINE

Table 8

LOCATING FILTER RETAINER BRACKETS IN DUCTWORK

CABINETWIDTH

RETURNDUCTWIDTH

DIMENSION"A"

DIMENSION"B"

FILTERBRACKET

LOCATION*

17-1/2" 16-1/4" 15" 14" 14-3/8"

21" 19-3/4" 19-1/2" 14" 13-1/8"

24-1/2" 23-1/4" 22" 14" 13-5/8" * LOCATION DIMENSION IS FROM END OF DUCT AGAINST THE FURNACE TO THE SCREW HOLES FOR THE BRACKET.

TYPICAL DOWNFLOW FURNACERETURN AIR FILTER INSTALLATIONSTwo filters are factory supplied for each downflow furnace.These furnaces require high velocity type air filters. Down-flow furnace filters must be located outside the furnacecabinet. Typical installations are shown in Figure 25. Table8 provides information for installation of the filter retainingbrackets shipped with downflow furnaces.

Table 6

MODELSNUMBERS

CABINET WIDTH

FILTERQTY & SIZE

*DH2B060A9V3VA*DH2B080A9V3VA*DH2B080A9V4VA

17-1/2" 2 - 14" X 20" X 1"

*DH2C100A9V4VA 21" 2 - 16" X 20" X 1"

*DH2D120A9V5VA 24-1/2" 2 - 16" X 20 X 1" * First letter may be "A" or "T"

Table 7

Figure 24

DOWNFLOW

OptionalBAYFLTR206

Door Kit

DOWNFLOW/HORIZONTALFigure 25

UPFLOW FILTER CLIP / BRACKET INSTALLATION1. Determine the location to be used. The furnace cabinet

has dimples for location of the furnace clips (Side returnonly). Pre-drill clearance holes with a 3/16" drill. Bottomreturn holes are pre-drilled.

2. Install the clips in front and rear of the desired locationusing the screws provided. The filter clip with the leafspring mounts in the rear of the cabinet. See Figure 24.

Optional doorkitBAYFLTR206

SIDE

CUT-OUT

ALTERNATE SIDEFILTER CLIPSLOCATIONS

ALTERNATE BOTTOMFILTER CLIPS LOCATIONS

18-CD26D1-13 15

Installer’s Guide

Do Not install return air through the side of the furnacecabinet on horizontal applications.

NOTE: Minimum return air temperature is 55° F.


Failure to follow the steps outlined below for each appliance connected to the venting system being placed into operation could result in carbon monoxide poisoning or death.

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

1. Seal any unused openings in the venting system.

2. Inspect the venting system for proper size and horizontal pitch, as required in the National Fuel Gas Code, ANSI Z223.1/NFPA 54 or the CSA B149.1 Natural Gas and Propane Installation Code and these instructions. Determine that there is no blockage or restriction, leakage, corrosion and other deficiencies which could cause an unsafe condition.

3. As far as practical, close all building doors and windows and all doors between the space in which the appliance(s) connected to the venting system are located and other deficiencies which could cause an unsafe condition.

4. Close fireplace dampers.

5. Turn on clothes dryers and any appliance not connected to the venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they are operating at maximum speed. Do not operate a summer exhaust fan.

6. Follow the lighting instructions. Place the appliance being inspected into operation. Adjust the thermostat so appliance is operating continuously.

7. Test for spillage from draft hood equipped appliances at the draft hood relief opening after 5 minutes of main burner operation. Use the flame of a match or candle.

8. If improper venting is observed during any of the above tests, the venting system must be corrected in accordance with the National Fuel Gas Code, ANSI Z221.1/NFPA 54 and/or CSA B149.1 Natural Gas and Propane Installation Code.

9. After it has been determined that each appliance connected to the venting system properly vents where

when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas-fired burning appliance to their previous condition of use.

▲ WARNING!GENERAL VENTING FURNACE EXHAUST MUST BE VENTED TO THE

OUTDOORS. THESE FURNACES ARE INDUCED DRAFTVENTED AND MUST NOT BE CONNECTED TO ANYVENT SERVING ANOTHER APPLIANCE. PLEASE NOTETHAT THESE FURNACES USE POSITIVE-PRESSUREVENT SYSTEMS.

Proper venting is essential to obtain maximum efficiencyfrom a condensing Furnace. Proper installation of the ventsystem is necessary to assure drainage of the condensate andprevent deterioration of the vent system.

American Gas Association has certified the design of condens-ing Furnaces for a minimum of 0" clearance from combustiblematerials with a single wall plastic vent pipe.

The recommended system is assembled from 2", 2-1/2", or 3"plastic pipe and fittings (See Table 10, page 19). Where thesystem is routed to the outdoors through an existing masonrychimney containing flue products from another gas appliance,or where required by local codes, then 3" venting of Type 29-4Cstainless steel must be used in place of PVC material.

These Furnaces have been classified as CATEGORY IVFurnaces in accordance with ANSI Z21.47 “latest edition”standards. Category IV Furnaces operate with positive ventpressure and with a vent gas temperature less than 140°Fabove the dewpoint. These conditions require special ventingsystems, which must be gas tight and water tight.

NOTE: When an existing Furnace is removed from a ventingsystem serving other gas appliances, the venting system islikely to be too large to properly vent the remaining attachedappliances.

The following steps shall be followed with each applianceremaining connected to the common venting system placed inoperation, while the other appliances remaining connected tothe common venting system are not in operation.

1. Seal any unused openings in the common venting system.2. Visually inspect the venting system for proper size and

horizontal pitch and determine there is no blockage orrestriction, leakage, corrosion or other deficiencies whichcould cause an unsafe condition.

3. In so far as is practical, close all building doors andwindows and all doors between the space in which theappliances remaining connected to the common ventingsystem are located and other spaces of the building. Turnon clothes dryers and any appliances not connected to thecommon venting system. Turn on any exhaust fans, suchas range hoods and bathroom exhausts, so they willoperate at maximum speed. Do not operate a summerexhaust fan, close fireplace dampers.

4. Follow the lighting instructions. Place the appliancebeing inspected in operation. Adjust Comfort Control soappliance will operate continuously.

5. After it has been determined that each appliance remain-ing connected to the common venting system properlyvents when tested as outlined above, return door, windows,exhaust fans, fireplace dampers and any other gas-burning appliance to their previous conditions of use.

If improper venting is observed during any of the above tests,the remaining common venting system must be corrected.Correction could require rerouting or resizing the remainingvent system.

IMPORTANT: These Furnaces may be installed as DirectVent (sealed combustion) or as Nondirect Vent (single pipe).The Furnaces are shipped DIRECT VENT with sealedcombustion.


FAILURE TO FOLLOW THE INSTALLATION INSTRUCTIONSFOR THE VENTING SYSTEM BEING PLACED INTO OPERA-TION COULD RESULT IN CARBON MONOXIDE POISONINGOR DEATH.

▲ WARNING!

16 18-CD26D1-13

Installer’s GuideFor DIRECT VENT APPLICATION: The Furnaces mustbe vented to the exterior of the house and combustion airMUST come through the inlet air pipe FROM OUTSIDEAIR.NOTE: BAYVENT200* accessories can be used for inlet andoutlet terminals when the pipes do not exit the structuretogether. For Canadian applications ONLY, IPEX 196006may be used for horizontal and vertical terminations. IPEX081216, IPEX 081218, and IPEX 081219 may only be usedfor horizontal vent terminations.

For NONDIRECT VENT APPLICATION: The Furnaceshall be vented to the exterior of the house, but combustionair may enter from the surrounding area as long as com-bustion air requirements are met. (See AIR FOR COM-BUSTION AND VENTILATION)

FURNACE VENT / INLET PIPE INSTALLATIONThere are many different variations of the vent / inlet air pipecombination. The vent / inlet air combination used forinstallation of these Furnaces depends on the needs of thelocation. However, these guidelines must be followed:

1. The Furnace must vent outside the structure.2. Furnace combustion air requirements must be met for

non-direct, single pipe applications.3. For direct vent application of these Furnaces, the vent

pipe and air inlet pipe do not have to exit in the same airspace or even on the same surface of the structure.However, the longest individual pipe will decide the valuefor the longest allowable equivalent vent/ inlet air length asshown in the vent length table on page 19.

NOTE: Vent termination kit BAYAIR30AVENTA orBAYVENT200B may be used in addition to the horizontal andvertical termination options shown in the following ex-amples. For Canadian applications ONLY, IPEX 196006 maybe used for horizontal and vertical terminations. IPEX081216, IPEX 081218, and IPEX 081219 may only be usedfor horizontal vent terminations.

The following are EXAMPLES ONLY:

EX. 1 —

Example 1 shows that the vent may go vertical while the inletair may be on any side of the structure. The vent pipe woulddecide the maximum equivalent length for the pipe dependingon the furnace and pipe size.

EX. 2 —

Example 2 shows the vent pipe exhausting through the roofand the inlet air coming from the interior of the house. Theinlet air coming from the interior of the house must meetcombustion requirements for area, etc., as shown in thesection AIR FOR COMBUSTION AND VENTILATION inthis Installer’s Guide.

EX. 3 —

Example 3 shows the vent exiting one side of the house whilethe inlet air is on the opposite side of the structure. Here thevent pipe length must be within the allowable length for thesize of Furnace and size of the vent pipe. This exampledemonstrates that the pipes do not have to exit on the sameside of the structure.

EX. 4 —

The inlet air does not have to come from outside the structure.Example 4 shows the inlet air, may come from the attic if therequirements for combustion air are met as shown in thesection AIR FOR COMBUSTION AND VENTILATION.

NOTE: If only the flue gas pipe is to the outside of thestructure, a straight section of pipe (long enough to exit theFurnace cabinet) must be attached to the inlet air side withan elbow (which is 5 to 10 equiv. ft.) installed on the end toprevent dust and debris from falling directly into the Fur-nace.

Furnace

AirInlet

VentExample 1

Furnace

Vent

AirInlet

(See Note)

Example 2

Furnace

AirInlet

Vent

Example 3

Furnace

AirInlet

VentAtticVent

(See Note)

Example 4

18-CD26D1-13 17

Installer’s GuideVENT FITTING MATERIAL – PLASTICGas and liquid tight single wall vent fittings, designed forresistance to corrosive flue condensate, MUST be usedthroughout.

Listed in Table 9, page 18, are designations for differenttypes of 2" and 3" size pipe and fittings that meet theserequirements. The materials listed are various grades ofPVC, CPVC, and ABS plastic.

PIPE JOINTS: All joints must be fastened and sealed toprevent escape of combustion products into the building.

NOTE: It is recommended that the first joints from theFurnace be connected and sealed with high temperatureRTV. This will enable the pipes to be removed later withoutcutting.

Be sure to properly support these joints.

BONDING OF PVCCommercially available solvent cement for PVC must beused to join PVC pipe fittings. Follow instructions oncontainer carefully.

Pipe and Fitting – ASTM D1785, D2466, D2661, & D2665

PVC Primer and Solvent Cement – ASTM D2564

Procedure for Cementing Joints – Ref ASTM D28551. Cut pipe square, remove ragged edges and burrs. Cham-

fer end of pipe, then clean fitting socket and pipe jointarea of all dirt, grease, moisture or chips.

2. After checking pipe and socket for proper fit, wipe socketand pipe with cleaner-primer. Apply a liberal coat ofprimer to inside surface of socket and outside of pipe.DO NOT ALLOW PRIMER TO DRY BEFORE APPLY-ING CEMENT.

3. Apply a thin coat of cement evenly in the socket. Quicklyapply a heavy coat of cement to the pipe end and insertpipe into fitting with a slight twisting movement until itbottoms out.

4. Hold the pipe in the fitting for 30 seconds to preventtapered socket from pushing the pipe out of the fitting.

5. Wipe all excess cement from the joint with a rag. Allow15 minutes before handling. Cure time varies accordingto fit, temperature and humidity.

Seal VENT PIPEwith RTV sealant

Seal INLET AIR PIPEwith RTV sealant

Front of Furnace

VENT AND INLET AIR CONNECTIONS

Figure 26

NOTE: Follow venting instructions carefully when using PVCcement.

IMPORTANT: All joints must be water tight. Flue condensateis somewhat acidic, and leaks can cause equipmentdamage.

Connection of the pipe and collar of the combustion air inletshould just be a friction fit. It is recommended that the inletair joint be sealed with RTV type sealant to allow the joint tobe separated for possible future service. The inlet and ventpipes must be properly supported throughout the entirelength. See Figure 26.

NOTE: Vent termination kit BAYAIR30AVENTA orBAYVENT200B may be used in addition to the horizontaland vertical termination options shown in the followingfigures. For Canadian applications ONLY, IPEX 196006 maybe used for horizontal and vertical terminations. IPEX081216, IPEX 081218, and IPEX 081219 may only be usedfor horizontal vent terminations.

Important: Products installed in Canada must use ventsystems that are certified to the Standard for Type BH GasVenting Systems (ULC S636) for Class II-A venting sys-tems (up to 65°C). Components of the vent system mustnot be interchanged with other vent systems or unlistedpipe or fittings. Plastic components, specified primers, andglues must be from a single system manufacturer and notintermixed with other system manufacturer's vent systemparts. In addition, the first three feet of the vent pipe mustbe visible for inspection.

18 18-CD26D1-13

Installer’s Guide

PLASTIC PIPE DESIGNATIONS

PVCASTM STANDARD PIPE TYPE ALLOWABLE TEMPERATURE MARKING

F891 CELLULAR CORE *158 ASTM F891

D2665 DWV PIPE **158 ASTM D2665

D1785 SCH 40, 80, 120 **158 ASTM D1785

D2241 SDR SERIES **158 ASTM D2241

CPVCASTM STANDARD PIPE TYPE ALLOWABLE TEMPERATURE MARKING

D2846 CPVC 41 **212 ASTM D2846

F441 SCH 40, 80 **212 ASTM F441

F442 SDR SERIES **212 ASTM F442

ABSASTM STANDARD PIPE TYPE ALLOWABLE TEMPERATURE MARKING

D2661 SCH 40 DWV ***180 ASTM D2661

F628 SCH 40 DWV CELLULAR CORE ***180 ASTM F628

* - Allowable temperatures based on classifications covered in ASTM D4396 [Deflection Temps Under Load (264 PSI)] ** - Allowable temperatures based on classifications covered in ASTM D1784 [Deflection Temps Under Load (264 PSI)] *** - Allowable temperatures based on classifications covered in ASTM D3965 [Deflection Temps Under Load (264 PSI)]

Table 9

PVC VENT FITTING MATERIAL These fittings are available from your Gas Furnace Distributors.

18-CD26D1-13 19

Installer’s GuideTable 10

Table 11PART NUMBERS FOR REPLACEMENT ORIFICES

DRILLSIZE

PARTNUMBER

DRILLSIZE

PARTNUMBER

44454647484950

ORF00501ORF00644ORF00909ORF00910ORF01099ORF00503ORF00493

545556575859

ORF00555ORF00693ORF00907ORF00908ORF01338ORF01339

If the desired input rate cannot be achieved with a change inmanifold pressure, then the orifices must be changed. LPinstallations will require an orifice change.

Important: Reinstall the propane orifices to the same depth asthe orifices supplied with the equipment.

See Table 11 for help in selecting orifices if orifice change isrequired. Furnace input rate and temperature rise should bechecked again after changing orifices to confirm the properrate for the altitude. For information on high altitude derat-ing, refer to page 34.

The Vent Length Table (Table 10) above shows the requiredvent lengths for installations at various altitudes. Anoptional high altitude kit is available for installations above5000 feet (Installations above 12,000 feet are not allowed).

Table 12O rific e

Tw is t D rillS iz e If

In s ta lle dA t S e aL ev e l

A LT IT U D E A B O V E S E A L E V E L

a n d O rific e R e q u ire d A t O th e r E leva tio n s

2 0 0 0 3 0 0 0 4 0 0 0 5 0 0 0 6 0 0 0 7 0 0 0 8 0 0 0 9 0 0 0 1 0 0 0 04 24 34 44 54 64 74 84 9

4 24 44 54 64 74 84 95 0

4 34 44 54 74 74 84 95 0

4 34 44 54 74 74 94 95 0

4 34 54 64 74 84 95 05 1

4 44 54 74 84 84 95 05 1

4 44 64 74 84 95 05 05 1

4 54 74 84 94 95 05 15 2

4 64 74 84 95 05 15 15 2

4 74 85 05 05 15 25 25 2

5 05 15 25 35 45 55 65 75 8

5 15 15 25 45 45 55 65 85 9

5 15 25 35 45 55 55 65 96 0

5 15 25 35 45 55 55 75 96 0

5 15 25 35 45 55 65 76 06 1

5 25 25 35 45 55 65 76 06 2

5 25 35 35 45 55 65 86 16 2

5 25 35 45 55 65 65 96 26 3

5 35 35 45 55 65 65 96 36 3

5 35 45 45 55 65 76 06 36 4

Fro m N a tio n a l F u e l G a s C o d e - Ta b le F -4

VENT LENGTH TABLE

ALTITUDEMAXIMUM TOTAL EQUIVALENT LENGTH IN FEET

FOR VENT AND INLET AIR (SEE NOTES)

0-7,000 Feet 2 INCH PIPE 2.5 INCH PIPE 3 or 4 INCH PIPE

*UH/DH2B060A9V3VA 200 200 200

*UH/DH2B080A9V3VA*UH/DH2B080A9V4VA

50 120 200

*UH/DH2C100A9V4VA*UH2C100A9V5VA

Not Allowed 60 200

*UH/DH2D120A9V5VA Not Allowed Not Allowed 200

7,000-9,500 Feet 2 INCH PIPE 2.5 INCH PIPE 3 or 4 INCH PIPE

*UH/DH2B060A9V3VA 100 100 100


25 60 100


Not Allowed 30 100


9,500-12,000 Feet 2 INCH PIPE 2.5 INCH PIPE 3 or 4 INCH PIPE

*UH/DH2B060A9V3VA 50 50 50


Not Allowed 30 50


Not Allowed Not Allowed 50


NOTES: * - First letter may be "A" or "T"1. Minimum vent length for all models: 3' horizontal or 3' vertical.2. DO NOT MIX PIPE DIAMETERS IN THE SAME LENGTH OF PIPE OUTSIDE THE FURNACE CABINET (Exceptadapters at the top of the furnace). If different inlet and vent pipe sizes are used, the vent pipe must adhere to themaximum length limit shown in the table above (See note 6 below for exception). The inlet pipe can be of a larger diameter,but never smaller than the vent pipe.3. MAXIMUM PIPE LENGTHS MUST NOT BE EXCEEDED! THE LENGTH SHOWN IS NOT A COMBINED TOTAL, IT ISTHE MAXIMUM LENGTH OF EACH (Vent or Inlet air pipes).4. One SHORT radius 90° elbow is equivalent to 10' of 3" or 4" pipe and one LONG radius elbow is equivalent to 6' of 3" or4" pipe. One 90° elbow is equivalent to 7½' of 2½" pipe or 5' of 2" pipe. Two 45° elbows equal one 90°elbow.5. The termination tee or bend must be included in the total number of elbows. If the BAYAIR30AVENTA termination kit isused, the equivalent length of pipe is 5 feet. BAYVENT200B equivalent length is 0 feet.6. Pipe adapters are field supplied (except for the *UH/DH2D120 models).7. For Canadian applications ONLY, IPEX 196006 may be used for horizontal and vertical terminations. IPEX 081216, IPEX081218, and IPEX 081219 may only be used for horizontal vent terminations. Equivalent lengths are IPEX 196009 = 5feet, IPEX 081216 = 11 feet, IPEX 081218 = 16 feet, and IPEX 081219 = 21 feet

20 18-CD26D1-13

Installer’s Guide

▲ CAUTION!When the vent pipe is exposed to temperatures belowfreezing, e.g., when it passes through unheated spaces, etc.,the pipe must be insulated with 1/2 inch (22.7 mm) thickArmaflex-type insulation or equal.

If the space is heated sufficiently to prevent freezing, thenthe insulation will not be required. If domestic water pipesare not protected from freezing then the space meets thecondition of a heated space.

NOTE: If your furnace comes with a factory supplied 2" X 3"offset reducing coupling is used for 3" vent pipe installation,make sure the marking “TOP” is located on the top side ofthe pipe.The straight side of the coupling must be on bottom forproper drainage of condensate. See Figure 27.

Horizontal Venting

NOTE:Vent termination kit BAYAIR30AVENTA or BAYVENT200Bmay be used in addition to the horizontal and verticaltermination options shown in the following figures. ForCanadian applications ONLY: IPEX 196006 may beused for horizontal and vertical terminations. IPEX081216, IPEX 081218, and IPEX 081219 may only beused for horizontal vent terminations.

HORIZONTAL VENTING(Upflow/ Horizontal)

Figure 28

2" TO 3" COUPLING

FURNACE VENT OUTLET

FACTORY SUPPLIED ONLY WITH THE FOLLOWING MODELS:ALL 100,000 BTUH UPFLOW MODELS, ALL 120,000 BTUH UPFLOW MODELS, THE UX1C080A9601 MODEL, AND ALL DOWNFLOW MODELS

#CPL00938

Figure 30

Figure 27

POSSIBLE CONFIGURATIONS FOR TWO PIPE VENTING SYSTEMS

9" MINIMUM

9" MINIMUM

9" MINIMUM

9" MINIMUM9" MINIMUM

ELBOW AND TEE MUSTBE AS CLOSE TO-GETHERAS POSSIBLE

18-CD26D1-13 21

Installer’s Guide

HORIZONTAL VENTING THROUGH WALLThese Furnaces may be installed as direct vent (asshipped) or as nondirect vent. Installation must con-form to national, state, and local codes.

The vent & inlet terminals must be located at least 12"minimum (18" minimum in Canadian applications) abovenormally expected snow accumulation level.

Avoid areas where staining or condensate drippage may be aproblem.

Location of the vent/wind terminal should be chosen to meetthe requirements of Figure 42 for either direct or non-directvent applications.

PITCH — Venting through the wall must maintain 1/4" perfoot pitched upward to insure that condensate drains back tothe Furnace.

FLUE GAS DEGRADATION — The moisture content of theflue gas may have a detrimental effect on some buildingmaterials. This can be avoided by using the roof or chimneyventing option. When wall venting is used on any surface thatcan be affected by this moisture, it is recommended that acorrosion resistant shield (24 inches square) be used behindthe vent terminal. This shield can be wood, plastic, sheetmetal, etc. Also, silicone caulk all cracks, seams and jointswithin 3 feet of the vent terminal.

VENT

COMBUSTIONAIR

VENT

VENTPLATE

VENTCAP

12" MINIMUMTO OVERHANG

MAINTAIN 12" (18" FOR CANADA) MINIMUMCLEARANCE ABOVE HIGHEST ANTICIPATED

SNOW LEVEL OR GRADE WHICHEVER IS GREATER

SCREWS(4 req.)

ANCHORS(4 req.)

7.2"

3.2"

Figure 32. BAYVENT200B

RAIN CAP

COMBUSTION AIR

STRAP(FIELD SUPPLIED)

COMBUSTIONAIR

VENT

ELBOW(FIELD SUPPLIED)

VENT

1" + 1/2"

Figure 33

BAYAIR30AVENTA(Sidewall)

Important: The Commonwealth of Massachusettsrequires compliance with regulation 248 CMR 4.00 and5.00 for installation of through – the – wall vented gasappliances as follows:

For all side wall horizontally vented gas fueledequipment installed in every dwelling, building orstructure used in whole or in part for residentialpurposes, including those owned or operated by theCommonwealth and where the side wall exhaust venttermination is less than seven (7) feet above finishedgrade in the area of the venting, including but not limitedto decks and porches, the following requirements shall besatisfied:

1. INSTALLATION OF CARBON MONOXIDEDETECTORS. At the time of installation of theside wall horizontal vented gas fueledequipment, the installing plumber or gasfittershall observe that a hard wired carbon monoxidedetector with an alarm and battery back-up isinstalled on the floor level where the gasequipment is to be installed. In addition, theinstalling plumber or gasfitter shall observe thata battery operated or hard wired carbonmonoxide detector with an alarm is installed oneach additional level of the dwelling, building orstructure served by the side wall horizontalvented gas fueled equipment. It shall be theresponsibility of the property owner to secure theservices of qualified licensed professionals forthe installation of hard wired carbon monoxidedetectors

a. In the event that the side wallhorizontally vented gas fueledequipment is installed in a crawl spaceor an attic, the hard wired carbonmonoxide detector with alarm andbattery back-up may be installed on thenext adjacent floor level.

b. In the event that the requirements ofthis subdivision can not be met at thetime of completion of installation, theowner shall have a period of thirty (30)days to comply with the aboverequirements; provided, however, thatduring said thirty (30) day period, abattery operated carbon monoxidedetector with an alarm shall beinstalled.

2. APPROVED CARBON MONOXIDEDETECTORS. Each carbon monoxide detector asrequired in accordance with the above provisionsshall comply with NFPA 720 and be ANSI/UL2034 listed and IAS certified.

▲ CAUTION!The vent for this appliance shall not terminate

(1) Over public walways; or

(2) Near sofit vents or crawl space vents or other areaswhere condensate or vapor could create a nuisance orhazard or cause property damage; or

(3) Where condensate vapor could cause damage or could bedetrimental to the operation of regulators, relief valves.or other equipment.

For Canadian applications only, IPEX 196006, IPEX 081216, IPEX081218, and IPEX 081219 may be used for horizontal vent terminations.

For Canadian applications only, IPEX 196006, IPEX 081216, IPEX 081218,and IPEX 081219 may be used for horizontal vent terminations.

22 18-CD26D1-13

Installer’s Guide

VENT TABLES

COMBUSTIBLE MATERIAL WALLA minimum clearance of 1" to combustible materials must bemaintained when using single wall stainless steel venting.

Shield material to be a minimum of 24 gauge stainless oraluminized sheet metal. Minimum dimensions are 12"x12".Shield must be fastened to both inside and outside of wall.Use screws or anchor type fasteners suited to the outside orinside wall surfaces.

NONCOMBUSTIBLE MATERIAL WALLThe hole through the wall must be large enough to maintainpitch of vent and properly seal.

Use cement mortar seal on inside and outside of wall. SeeFigure 35.

COUPLING(PLASTICVENTING)

PVC WALLMOUNT FLANGE (OPTIONAL)

APPROVEDTERMINATION

CEMENTMORTAR SEAL INSIDE & OUTSIDE

VENTING THROUGH NON-COMBUSTIBLE WALLS Pitch - 1/4 Inch Per Foot

12” MINIMUM ABOVENORMALLY EXPECTEDSNOW ACCUMULATIONLEVEL

6 IN. MIN.(TO JOINT)

Figure 35

COUPLING(PLASTICVENTING) STUD

PVC WALLMOUNT FLANGE (OPTIONAL)

APPROVEDTERMINATION

1” CLEARANCE(AIR SPACE)

VENTING THROUGH COMBUSTIBLE WALLS Pitch - 1/4 Inch Per Foot

CLEARANCE (0” ACCEPTABLE FOR PVC VENT PIPE)(1” ACCEPTABLE FOR TYPE 29-4C STAINLESS STEEL VENT

12” MINIMUM ABOVENORMALLY EXPECTEDSNOW ACCUMULATIONLEVEL

6 IN. MIN.(TO JOINT)

Figure 34

3. SIGNAGE. A metal or plastic identificationplate shall be permanently mounted to theexterior of the building at a minimum height ofeight (8) feet above grade directly in line with theexhaust vent terminal for the horizontally ventedgas fueled heating appliance or equipment. Thesign shall read, in print size no less than one-half(1/2) inch in size, “GAS VENT DIRECTLYBELOW. KEEP CLEAR OF ALLOBSTRUCTIONS”.

4. INSPECTION. The state or local gas inspectorof the side wall horizontally vented gas fueledequipment shall not approve the installationunless, upon inspection, the inspector observescarbon monoxide detectors and signage installedin accordance with the provisions of 248 CMR5.08(2)(a)1 through 4.

This appliance requires a special venting system. IfBAYAIR30AVENTA or BAYVENT200B are used, acopy of the installation instructions for the kit shallremain with the appliance or equipment at thecompletion of installation. The venting systeminstallation instructions can be obtained from themanufacturer by writing to the following address:

Trane

6200 Troup Highway

Tyler, TX 75707

Attention: Manager of Field Operations Excellence

18-CD26D1-13 23

Installer’s Guide

REMOVE RIBSFROM CAP

COMBUSTION AIR

ROOF FLASHING BOOT(FIELD SUPPLIED)

COMBUSTIONAIR

VENT

ELBOW(FIELD SUPPLIED)

MAINTAIN 12 IN.(18 IN. FOR CANADA)MINIMUM CLEARANCEABOVE HIGHEST ANTICIPATED SNOWLEVEL. MAXIMUM OF24 IN. ABOVE ROOF

SUPPORT(FIELD SUPPLIED)

VENT

Figure 38. BAYAIR30AVENTA (VERTICAL)

GALVANIZED FIRESTOP SHOULDBE FABRICATED WITH 3-7/8" DIA.HOLE FOR SUPPORT FLANGE(12" x 12" PANEL OR 12" DIA MIN.)

VENTING THROUGH CEILING

CEILING

SUPPORTFLANGE

FLUE PIPE

COUPLING

SEAL BETWEEN FLANGE, PIPE,COUPLING AND METAL PANELWITH HI TEMP RTV SILICONE SEALANT

CLEARANCE ( 0" ACCEPTABLE FOR PVC VENT PIPE )( 1" ACCEPTABLE FOR TYPE 29-4C STAINLESS STEEL VENT PIPE )

Figure 39

MAINTAIN 12 IN.(18 IN. FOR CANADA)MINIMUM CLEARANCEABOVE HIGHESTANTICIPATED SNOW LEVEL. MAXIMUM OF24 IN. ABOVE ROOF.

VENT

COMBUSTIONAIR

Figure 37 BAYAIR30AVENTA (VERTICAL)

Figure 36

SUPPORT HORIZONTAL PIPE EVERY 3' 0"WITH THE FIRST SUPPORT AS CLOSE TOTHE FURNACE AS POSSIBLE. INDUCEDDRAFT BLOWER, HOUSING, ANDFURNACE MUST NOT SUPPORT THEWEIGHT OF THE FLUE PIPE.

For Canadian applications only, IPEX 196006 may be usedfor vertical vent terminations.

12 INCHES MIN. CLEARANCE MUST BEMAINTAINED ABOVE HIGHESTANTICIPATED SNOW LEVEL. MAXIMUM NOT TO EXCEED 24 INCHES ABOVE ROOF.

For Canadian applications only, IPEX 196006may be used for vertical vent terminations.

24 18-CD26D1-13

Installer’s GuideVENTING THROUGH THE ROOFWhen penetrating roof with a 2" PVC vent pipe, a 2" electricalconduit flashing may be used for a weather tight seal.Lubricate flexible seal on flashing before PVC pipe is pushedthrough the seal. (Field Supplied)

NOTE: No vent cap as shown in Figure 37 is the preferredmethod for vertical vent termination in extremely coldclimates.In extreme climate conditions, insulate the exposed pipeabove the roof line with Armaflex type insulation.

VENT FITTING MATERIAL – STAINLESS STEELGas and liquid tight single wall metal vent fitting, designedfor resistance to corrosive flue condensate such as Type 29-4CMUST be used throughout.

These fittings and fitting accessories are to be field supplied.

DIRECTION OF STAINLESS STEEL FITTINGAll stainless steel fitting must be installed with male endtowards the Furnace.

All horizontal stainless steel sections must be positionedwith the seam on top.

All long horizontal sections must be supported to preventsagging.

All pipe joints must be fastened and sealed to prevent escapeof combustion products into the building.

Figure 40

TYPE 29-4C STAINLESS STEEL VENTING - USEDTHROUGH CHIMNEY THAT VENTS ANOTHER GAS

APPLIANCE

Figure 41. VENTING ROUTED THROUGH A MASONRY CHIMNEY

PVC PLASTIC VENTING - ONLYTHROUGH UNUSED CHIMNEY

SUPPORT THE SINGLEWALL FLUE PIPE AND CENTER IT IN THE CHIMNEY OPENING WITH ANGLES AS SHOWN OR ANOTHER EQUIVALENT MANNER.

NOTE:HORIZONTAL VENTING TO VERTICAL VENTING

6 IN. MIN.

STAINLESSSTEELVENT CAP

SEE CAUTION

FLUE PIPE

COUPLINGAS REQUIRED

FLUE PIPE

COUPLING TO SUPPORT PIPE FROM ANGLES OR OTHER SUITABLESUPPORT METHOD

SUPPORT THE SINGLE WALL STAINLESS STEEL GASVENTING AND CENTER IT IN THE CHIMNEY OPENING WITH ANGLES AS SHOWN OR ANOTHER EQUIVALENTMANNER.

NOTE:HORIZONTAL VENTINGTO VERTICAL VENTING

6 IN. MIN.SEE CAUTION

STAINLESSSTEELVENT CAP

▲ CAUTION!Do NOT run vent through chimney for wood burning oroil Furnaces or incinerators or any other gas appliance.

IMPORTANT –The single wall flue pipe joints must be sealed.

The 90° elbow connection to vertical pipe must be sealed toprevent condensate leakage to base of masonry chimney.

▲ CAUTION!Do NOT run vent through chimney for wood burning or oilFurnaces or incinerators.

If remaining free area between single wall flue pipe andmasonry chimney is to be used for another gas applianceventing area must be sufficient to vent that appliance andthat appliance must be connected to chimney withseparate entry openings.

IMPORTANT –The single wall flue pipe joints must be sealed.

The 90° elbow connection to vertical pipe must be sealed toprevent condensate leakage to base of masonry chimney.

STAINLESS STEEL VENT CAP(OPTIONAL)

STAINLESS STEEL VENT CAP(OPTIONAL)

18-CD26D1-13 25

Installer’s Guide

V

D

EE

V

G

INSIDECORNER DETAIL

BL V

V

FIXED CLOSED

OPERABLE

F

B

C

VFIXED

CLOSEDV

V

VB

B

B

A

X

J

B

H

I

V X

K

M

V VENT TERMINAL X AIR SUPPLY INLET AREA WHERE TERMINAL IS NOT PERMITTED

OPERABLE

Figure 42. HORIZONTAL VENT CLEARANCES

Non-Direct Vent Terminal Clearances

Canadian Installations US Installations

A=Clearance above grade, veranda, porch, deck, orbalcony 12 inches (30 cm) 12 inches (30 cm)

B= Clearance to window or door that may be opened

6 inches (15 cm) for appliances =/< 10,000 Btuh (3 kw),12 inches (30 cm) for appliances > 10,000 Btuh (3 kw)and =/< 100,000 Btuh (30 kw),36 inches (91 cm) for appliances > 100,000 Btuh (30 kw)

4 feet (1.2m) below or to the side of opening;1 foot (0.3m) above opening.

C= Clearance to permanently closed window * *

D=Vertical clearance to ventilated soffit located abovethe terminal within a horizontal distance of 2 feet(61 cm) from the center line of the terminal

* *

E= Clearance to unventilated soffit * *

F= Clearance to outside corner * *

G= Clearance to inside corner * *

H= Clearance to each side of center line extendedabove meter/regulator assembly

3 feet (91 cm) with a height 15 feet (4.5 m) above themeter/regulator assembly

*

I= Clearance to service regulator vent outlet 3 feet (91 cm) *

J=Clearance to nonmechanical air supply inlet tobuilding or the combustion air inlet to any otherappliance


4 feet (1.2 m) below or to side of opening;1 foot (300 m) above opening

K= Clearance to a mechanical air supply inlet 6 feet (1.83m)3 feet (91 cm) above if within

10 feet (3m) horizontally

L=Clearance above a paved sidewalk or paveddriveway located on public property

7 feet (2.13 m) † 7 feet (2.13 m)

M= Clearance under veranda, porch, deck, or balcony 12 inches (30 cm) ‡ *

Notes: 1. In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code. 2. In accordance with the current ANSI Z223.1/NFPA 54 National Fuel Gas Code. †. A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwelling and serves both dwellings. ‡. Pemitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor. * Clearance in accordance with local installation codes and the requirements of the gas supplier and the manufacturer's Installation Instructions.

Table 13

26 18-CD26D1-13

Installer’s Guide

Direct Vent Terminal Clearances

Canadian Installations US Installations

A=Clearance above grade, veranda, porch,deck, or balcony 12 inches (30 cm) 12 inches (30 cm)

B=Clearance to window or door that may beopened



C= Clearance to permanently closed window * *

D=

Vertical clearance to ventilated soffitlocated above the terminal within ahorizontal distance of 2 feet (61 cm)from the center line of the terminal

* *

E= Clearance to unventilated soffit * *

F= Clearance to outside corner * *

G= Clearance to inside corner * *

H= Clearance to each side of center lineextended above meter/regulator assembly

3 feet (91 cm) with a height 15 feet (4.5 m) above themeter/regulator assembly *

I= Clearance to service regulator vent outlet 3 feet (91 cm) *

J=Clearance to nonmechanical air supplyinlet to building or the combustion airinlet to any other appliance



K= Clearance to a mechanical air supply inlet 6 feet (1.83m) 3 feet (91 cm) above if within 10 feet (3m) horizontally

L= Clearance above a paved sidewalk orpaved driveway located on public property

7 feet (2.13 m) † *

M=Clearance under veranda, porch, deck,or balcony 12 inches (30 cm) ‡ *

Notes: 1. In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code. 2. In accordance with the current ANSI Z223.1/NFPA 54 National Fuel Gas Code.†. A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwelling and serves both dwellings.‡. Pemitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor. * Clearance in accordance with local installation codes and the requirements of the gas supplier and the manufacturer's Installation Instructions.

Table 14

6" Min.

40 Inch Upflow or Downflow Furnace

Slope 1/4" per ft.

Slope 1/4" per ft.

NOTES:A) Condensate trap for vent pipe must be a minimum of 6 inches in height.B) Condensate trap for vent and inlet pipe must be connected into a condensate drain pump; an open or

vented drain; or it can be connected to the outlet hose of the Furnace condensate trap. Outdoor drainingof the Furnace and coil condensate is permissible if allowed by local codes.

▲ CAUTION!Caution should be taken to prevent drains from freezing or causing slippery conditions that could lead topersonal injury. Excessive draining of condensate may cause saturated ground conditions that may resultin damage to plants.

C) The condensate trap should be primed at initial start up prior to heating season operation.

All horizontal pipes must besupported at maximum of 3

foot intervals

DOWNWARD VENTINGFurnace may be in vertical or horizontal configuration.

Figure 43

DOWNWARD VENT LENGTH ISLIMITED TO A MAXIMUM OF 15

EQUIVALENT FEET.

18-CD26D1-13 27

Installer’s GuideCONDENSATE DRAIN INSTRUCTIONS

The inducer housing has a secondary drain opening at its9 o’clock position. Remove the plug and use the plug to coverthe hole at the 6 o’clock position. Reposition the Inducer draintube from 6 o’clock to the 9 o’clock location. Cut and reattachthe tube to the canister trap. Plug openings in Blower deck,Inducer and Blower section. See Figure 45.

Connections must be made to an OPEN/ VENTED DRAIN.

NOTE: All condensate drain piping supplies included withthe furnace are intended for internal piping only andshould not be applied external to the furnace. All externalpiping should use 1/2" size PVC pipe and fittings through-out for drain connections (fittings, pipe and PVC solventcement not provided with furnace, must be field supplied).

NOTE: A corrosion resistant condensate pump must beused if a pump is required for a specific drain system.

Knock outs are provided on the left and right hand side ofboth furnace cabinets for drain connections IN VERTICALAPPLICATIONS. The standard arrangement is for the drainconnection on the left side. The tubing may have to betrimmed in this application to avoid kinking.

The upflow (vertical application) has provisions for rightside drain connections by turning the trap and extending thetubing to the lower right front corner of the Furnace. Trim allexcess tubing to avoid kinking. The connecting tubing for leftor right side condensate drain shown in Figure 44 is shippedin the blower compartment.

It is always recommended that an auxiliary drain pan beinstalled under a horizontally installed evaporator or 90%Gas Furnace. Connect the auxiliary drain line to a separatedrain line (no trap is needed in this line).

All horizontal applications are left side only andrequire repositioning the condensate canister trap tothe exterior of the cabinet. Additionally the draintubing connected to the inducer housing must be reposi-tioned for removing the plug and reconnecting thetubing to the lower connection on the inducer housing.See Figure 45.

For horizontal installation, remove the condensate trap andposition the trap outside the cabinet through the slottedopening next to the secondary cell. On upflow/ horizontalmodels, remove lines from the blower section and pullthrough the blower deck. Cut and reattach the line from thesecondary cell (use the spring to prevent kinking).

▲▲ CAUTION!It is recommended that a drain pan be installed under thefurnace to prevent property damage or personal injury from leaking condensate.

THE UPFLOW (VERTICAL) MAY BE INSTALLEDLEFT OR RIGHT SIDE CONDENSATE DRAIN

TO DRAINRIGHT SIDE

HEADERUPFLOW FURNACE

(Vertical)

TO DRAINLEFT SIDE

HEADER

Figure 44

28 18-CD26D1-13

Installer’s Guide

IMPORTANT: The condensate drain should be installed withprovisions to prevent winter freeze-up of the condensatedrain line. Frozen condensate will block drains, resulting infurnace shutdown. If the drain line cannot be installed in aconditioned space and/ or its surrounding ambient tempera-ture is expected to fall below freezing, then heat tape shouldbe applied as required to prevent freezing (permanufacturer’s instructions). The heat tape should be ratedat 5 or 6 watts per foot at 120 volts. Self-regulating (pre-ferred) or thermostatically controlled heat tape is required.

Typical sources of UL listed heat tapes are W.W. Granger, Inc.(Wintergard PlusTM Series), McMaster Carr Supply Co.(3554 Series), or your equipment supplier.

The condensate drain may be cleaned or inspected by re-moval of the drain tube at the header.

Evaporator and Furnace condensate drain piping may bemanifolded together as shown in Figure 46. A primary drainvent stack must be installed and terminated below theoutlet of the secondary heat exchanger drain connection toprevent water from damaging Furnace controls if the primarydrain outlet plugs up.

Where the Furnace is installed above a finished ceiling,the primary drain vent stack must be installed suchthat overflow from the vent stack opening will flow intoan auxiliary drain pan in order to prevent water dam-age to the finished ceiling below.

ALL HORIZONTAL APPLICATIONSARE LEFT SIDE DRAIN ONLY

TOOPEN/

VENTEDDRAIN

UPFLOW FURNACE ON LEFT SIDEWITH LEFT DRAIN SHOWN

HEADER

Figure 45

Primary drain vent stackmust terminate belowsecondary heat exchangercondensate drain outlet.

To drain opening

If upflow furnace is installedover a finished ceiling, overflowfrom the primary drain ventstack must flow into an auxillarydrain pan to prevent damage tothe finished ceiling below.

Figure 46

18-CD26D1-13 29

Installer’s GuideHORIZONTAL APPLICATIONS

Upflow and Downflow furnaces - All horizontal applica-tions are left side only. It is always recommended that theauxiliary drain pan be installed under a horizontally in-stalled evaporator and/or 90% gas furnace. Connect theauxiliary drain pan to a separate drain line (no trap is neededin this line).

The trap must be repositioned to the exterior of the cabinet.Remove the trap from its present location and reposition thetrap outside of the unit, through the long circular hole, next to

Right side

VERTICAL APPLICATIONS

Upflow furnace - The connection tubing for left and rightside drainage is shipped in the blower compartment. Installthe connection tubing from the trap to the side of the unit andtrim all excess tubing to avoid kinks.

Downflow furnace - The furnace is shipped with the leftside drainage setup. To change the right side drain, removethe drain lines from the trap, rotate the trap 180° so it exitsto the right, reconnect the lines, and run a 1/2" CPVC pipefrom the trap out through the right side knock-out. Use RTVsilicone sealant to connect the CPVC pipe to the trap for easeof removing to clean the trap.

Figure 47. UPFLOW (VERTICAL)

Figure 48. UPFLOW HORIZONTAL 17" UNITS(Left side only)

Use Inducer Drainhose without

extension

Figure 49. UPFLOW (VERTICAL)

Left side

Useextensionhose here

Figure 50. UPFLOW HORIZONTAL 21" & 24" UNITS(Left side only)

30 18-CD26D1-13

Installer’s Guidethe secondary recuperative cell. Remove the larger drain line(from the secondary cell) and trim to fit between the second-ary cell and the new trap location. On upflow units, plug thehole in the blower deck where the tube went through.

Remove the hose from the induced blower and reposition intothe other drain tap of the inducer, which is located 90°clockwise around the inducer. Move the cap from that draintap to the unused drain tap. On upflow units, plug the hole inthe blower deck where the tube went through. This tube ondownflow units will need to be cut to fit between the inducerand the trap. On upflow units, this tube may need to beextended, using the tubing shipped with the furnace.

Connections must be made to an OPEN/VENTED DRAIN.Outdoor draining of the furnace and coil condensate ispermissible if allowed by local codes. Caution should be taken

to prevent drains from freezing or causing slippery conditionsthat could lead to personal injury. Excessive draining ofcondensate may cause saturated ground conditions that mayresult in damage to plants.

NOTE: Use 1/2" or larger PVC or CPVC pipe and fittings asrequired for drain connections (fittings, pipe and solventcement not provided).

NOTE: A corrosion resistant condensate pump must beused if a pump is required for a specific drain system.

IMPORTANT: The condensate drain should be installed withprovisions to prevent winter freeze-up of the condensate drainline. Frozen condensate will block drains, resulting in furnaceshutdown. If the drain line cannot be installed in a conditionedspace, then UL listed heat tape should be applied as requiredto prevent freezing (per manufacturer’s instructions). The heattape should be rated at 5 or 6 watts per foot at 120 volts. Self-regulating (preferred) or thermostatically controlled heat tape isrequired.

Figure 51. DOWNFLOW (VERTICAL)

Leftside

Use CPVC tubing from Trap outlet,over burner box to cabinet exit

Figure 52. DOWNFLOW (VERTICAL)

Rightside

Cut off curved end ofInducer drain hose

Figure 53. DOWNFLOW (HORIZONTAL)

18-CD26D1-13 31

Installer’s Guide

▲ CAUTION!Use a backup wrench on the gas valve when installing gaspiping to prevent damage to the gas valve and manifoldassembly.

Figure 54. UPFLOW MAY BE LEFT OR RIGHT HAND GAS PIPING

MAIN MANUALSHUT-OFF VALVE

AUTOMATIC GAS VALVEWITH MANUAL SHUT-OFF


GROUNDUNIONJOINT

DRIPLEG


GROUNDUNIONJOINT

DRIPLEG

Figure 55. THE DOWNFLOW (VERTICAL) MAY BE INSTALLED LEFT OR RIGHT SIDE GAS PIPING

GROUND UNION JOINT

AUTOMATICGAS VALVEWITH MANUALSHUT-OFF

AUTOMATICGAS VALVEWITH MANUALSHUT-OFF

MAIN MANUALSHUT-OFFVALVE



GROUNDUNION JOINT

DRIPLEG

DRIPLEG

Figure 56. HORIZONTAL FURNACE GAS PIPING MAY BE FROM EITHER SIDE(Typical UPFLOW Furnace in horizontal configuration shown)


32 18-CD26D1-13

Installer’s Guide

Table 16ORIFICE SIZES

INPUTRATINGBTUH

NUMBEROF

BURNERS

MAIN BURNER ORIFICEDRILL SIZE

NAT. GAS LP GAS

60,00080,000100,000120,000

3456

45454545

56565656

Combustion and Input Check(See also High Altitude Derate, page 34)

1. Make sure all gas appliances are off except the furnace.

2. Clock the gas meter with the furnace operating (deter-mine the dial rating of the meter) for one revolution.

3. Match the “Sec” column in the gas flow (in cfh) Table 13with the time clocked.

4. Read the “Flow” column opposite the number of secondsclocked.

5. Use the following factors if necessary:

For 1 Cu. Ft. Dial Gas Flow CFH =Chart Flow Reading ÷ 2

For 1/2 Cu Ft. Dial Gas Flow CFH =Chart Flow Reading ÷ 4

For 5 Cu. Ft. Dial Gas Flow CFH =10X Chart Flow Reading ÷ 4

6. Multiply the final figure by the heating value of the gasobtained from the utility company and compare to thenameplate rating. This must not exceed the nameplaterating.

Gas Valve AdjustmentChanges can be made by adjusting the manifold pressure

(See Table 17), or changing orifices (orifice change maynot always be required). To adjust the manifold pres-sure:

1. Turn off all electrical power to the system.

2. Attach a manifold pressure gauge with flexible tubing tothe outlet pressure boss marked “OUT P” on White-Rodgers gas valve model 36G or 36J. See Figure 57A forWhite-Rodgers gas valve model 36J. See Figure 57B forWhite-Rodgers gas valve model 36G.

3. Loosen (Do Not remove) the pressure tap test set screwone turn with 3/32" hex wrench.

a. The pressure tap adjustment kit (KIT07611)contains a 3/32" hex wrence, a 5/16" hose and aconnector and can be ordered through Global Parts.

4. Turn on system power and energize valve.

The upflow/horizontal furnace is shipped standard for leftside installation of gas piping. A knockout is provided on theright side for an alternate gas piping arrangement. See Figure54.

The installation of piping shall be in accordance with pipingcodes and the regulations of the local gas company. Pipe jointcompound must be resistant to the chemical reaction withliquefied petroleum gases.

Refer to piping Table 15, for delivery sizes. Connect gassupply to the unit, using a ground joint union and a manualshut-off valve as shown in Figures 43 & 44. National codesrequire a condensation drip leg to be installed ahead of thecontrols as shown in Figures 55 & 56.

The furnace and its individual shut-off valve must be discon-nected from the gas supply piping system during any pressuretesting of that system at test pressures in excess of 1/2 psig(3.5 kPa).

The furnace must be isolated from the gas supply piping byclosing its individual manual shut-off valve during anypressure testing of the gas supply piping system at testpressures equal to or less than 1/2 psig (3.5 kPa).

NOTE: Maximum pressure to the gas valve for natural gasis 13.8" W.C. Minimum pressure is 5.0" W.C. Maximumpressure to the gas valve for propane is 13.8" W.C. Mini-mum pressure is 11.0" W.C.

Table 15NATURAL GAS ONLY

TABLE OF CUBIC FEET PER HOUR OF GASFOR VARIOUS PIPE SIZES AND LENGTHS

PIPESIZE

LENGTH OF PIPE

10 20 30 40 50 60 70

1/2 132 92 73 63 56 50 46

3/4 278 190 152 130 115 105 96

1 520 350 285 245 215 195 180

1-1/4 1050 730 590 520 440 400 370

This table is based on Pressure Drop of 0.3 inch W.C. and 0.6 SP.GR. Gas

▲▲ WARNING!HAZARD OF EXPLOSION! NEVER USE AN OPEN FLAME TO DETECT GAS LEAKS. EXPLOSIVE CONDITIONS MAY OCCUR. USE A LEAK TEST SOLUTION OR OTHER APPROVED METHODS FOR LEAKTESTING. FAILURE TO FOLLOW RECOMMENDED SAFE LEAKTEST PROCEDURES COULD RESULT IN DEATH OR SERIOUSINJURY OR EQUIPMENT OR PROPERTY-ONLY-DAMAGE.

Gas Piping

▲ WARNING!HAZARD OF EXPLOSIONDO NOT USE SEMI-RIGID METALLIC GAS CONNECTORS(FLEXIBLE GAS LINES) WITHIN THE FURNACE CABINET.FAILURE TO FOLLOW THIS WARNING COULD RESULT INPROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

▲ WARNING!HAZARD OF EXPLOSIONREPLACE AND/ OR TIGHTEN ALL PLUGS REMOVED ORLOOSENED WHEN ADJUSTING GAS PRESSURE. LEAKCHECK THE FITTINGS BEFORE PLACING THE FURNACEINTO REGULAR SERVICE.FAILURE TO FOLLOW THIS WARNING COULD RESULT INFIRE, EXPLOSION, PROPERTY DAMAGE, OR DEATH.

All gas fittings must be checked for leaks using a soapy solutionbefore lighting the furnace. DO NOT CHECK WITH ANOPEN FLAME!

18-CD26D1-13 33

Installer’s Guide 5. Adjust 1st stage gas heat by removing the low (LO)

adjustment regulator cover screw.

a. To increase outlet pressure, turn the regulator adjustscrew clockwise.

b. To decrease outlet pressure, turn the regulator adjustscrew counterclockwise.

c. Adjust regulator until pressure shown on manometermatches the pressure specified in Table 17.

1. The input of no more than nameplate rating and noless than 93% of the nameplate rating, unless the unitis derated for high altitude.

d. Replace and tighten the regulator cover screw securely.

6. Adjust 2nd stage gas heat by removing the high (HI)adjustment regulator cover screw.

a. To increase outlet pressure, turn the regulator adjustscrew clockwise.

b. To decrease outlet pressure, turn the regulator adjustscrew counterclockwise.

c. Adjust regulator until pressure shown on manometermatches the pressure specified in Table 17.

1. The input of no more than nameplate rating and noless than 93% of the nameplate rating, unless the unitis derated for high altitude.

d. Replace and tighten the regulator cover screw securely.

7. Cycle the valve several times to verify regulator setting.

a. Repeat steps 5-7 if needed.

8. Turn off all electrical power to the system.

9. Remove the manometer and flexible tubing and tightenthe pressure tap screw.

10. Using a leak detection solution or soap suds, check forleaks at the pressure outlet boss and pressure tap testscrew.

11. Turn on system power and check operation of the unit.

ROTATE THE FRONTCOVER INWARD MAKINGSURE THAT ALL SIDEFLANGES ARE OUTSIDEOF THE BOX.

INSERT THE TOP FLANGEOF THE FRONT COVERUNDER THE LIP INSIDETHE BOX

ALL SIDE FLANGES MUSTBE OUTSIDE OF THE BOX

ROTATE THE FRONTCOVER AS SHOWN

Figure 58

2nd Stage (HI) ManifoldPressure Adjustment

Gas Valve On / OffToggle Switch

1st Stage (LO)Manifold PressureAdjustment

Figure 57A. White-Rodgers 36J

2nd Stage (HI) ManifoldPressure Adjustment

Gas Valve On / OffToggle Switch

1st Stage (LO)Manifold PressureAdjustment

Figure 57B. White-Rodgers 36G

Table 17

FINAL MANIFOLD PRESSURE SETTINGS (inches w.c.)

FUEL 2nd Stage Max. 1st Stage Max.

NATURAL GAS 3.5" W.C. 1.7" W.C.

LP GAS 10.5" W.C. 6.0" W.C.

OutletPressureBoss

Inlet PressureBoss

34 18-CD26D1-13

Installer’s Guide

Table 18

GAS FLOW IN CUBIC FEET PER HOUR2 CUBIC FOOT DIAL

SEC. FLOW SEC. FLOW SEC. FLOW SEC. FLOW8 900 29 248 50 144 82 889 800 30 240 51 141 84 8610 720 31 232 52 138 86 8411 655 32 225 53 136 88 8212 600 33 218 54 133 90 8013 555 34 212 55 131 92 7814 514 35 206 56 129 94 7615 480 36 200 57 126 96 7516 450 37 195 58 124 98 7317 424 38 189 59 122 100 7218 400 39 185 60 120 104 6919 379 40 180 62 116 108 6720 360 41 176 64 112 112 6421 343 42 172 66 109 116 6222 327 43 167 68 106 120 6023 313 44 164 70 103 124 5824 300 45 160 72 100 128 5625 288 46 157 74 97 132 5426 277 47 153 76 95 136 5327 267 48 150 78 92 140 5128 257 49 147 80 90 144 50

REINSTALLATION OF THE BURNER BOX COVERFigure 59 shows the correct way to reinstall the burner boxcover if adjustment or replacement of the flame sensor, hotsurface igniter, or main burner orifices have required removalof the cover.

Figure 59

NOTE: The manifold pressure must be referenced to theburner box. The burner box pressure tap equalizes the gasvalve pressure regulator. Manifold pressure is checked byinstalling a tee (field supplied) in the tubing, between the teecoming from the burner box tube and the gas valve, inaddition to the regular gas valve pressure tap on the outletside of the gas valve. See Figure 59.

Table 21 lists the main burner orifices used with the furnace.If a change of orifices is required to correct the furnace inputrating refer to Table 19.

▲ WARNING!HAZARD OF EXPLOSIONREPLACE AND/ ORTIGHTEN ALL PLUGSREMOVED OR LOOS-ENED WHEN ADJUST-ING GAS PRESSURE.LEAK CHECK THEFITTINGS BEFOREPLACING THE FURNACEINTO REGULAR SER-VICE.FAILURE TO FOLLOWTHIS WARNING COULDRESULT IN FIRE, EXPLO-SION, PROPERTYDAMAGE, OR DEATH.

18-CD26D1-13 35

Installer’s GuideHIGH ALTITUDE DERATEInput ratings (BTUH) of these Furnaces are based on sealevel operation and should not be changed at elevations up to2,000 ft.

If the installation is 2,000 ft. or above, the Furnace input rate(BTUH) shall be reduced 4% for each 1,000 ft. above sea level.

The Furnace input rate shall be checked by clocking the gasflow rate (CFH) and multiplying by the heating value ob-tained from the local utility supplier for the gas being deliv-ered at the installed altitude. Input rate changes can bemade by adjusting the Manifold Pressure (min 3.0 - max 3.7in. W.C. - Natural Gas) or changing orifices (orifice changemay not always be required).

If the desired input rate can not be achieved with a change inManifold Pressure, then the orifices must be changed. LPinstallations will require an orifice change.

IMPORTANT: Reinstall the replacement orifices to the samedepth as the orifices supplied with the equipment.

See Table 19 for help in selecting orifices if orifice change isrequired. Furnace input rate and temperature rise should bechecked again after changing orifices to confirm the proper ratefor the altitude.

The vent length table on page 19 shows the required ventlengths for installations at various altitudes. An optionalhigh altitude kit is available for installations above 5000feet. Installations above 12,000 feet are not allowed.

Table 19PART NUMBERS FOR REPLACEMENT ORIFICESDRILLSIZE

PARTNUMBER

DRILLSIZE

PARTNUMBER

44454647484950

ORF00501ORF00644ORF00909ORF00910ORF01099ORF00503ORF00493

545556575859

ORF00555ORF00693ORF00907ORF00908ORF01338ORF01339

Turn the main Gas Valve toggle switch (See Figures 30 & 31)within the unit to the “OFF” position. Turn the external gasvalve to “ON”. Purge the air from the gas lines. After purging,check all gas connections for leaks with a soapy solution -- DONOT CHECK WITH AN OPEN FLAME. Allow 5 minutesfor any gas that might have escaped to dissipate.

LP Gas being heavier than air may require forced ventilation.Turn the toggle switch on the Gas Valve in the unit to the “ON”position.

If your application requires a high altitude pressure switchuse Table 20 to select the appropriate kit for your modelfurnace.

OrificeTwist Drill

Size IfInstalledAt SeaLevel

ALTITUDE ABOVE SEA LEVEL

and Orifice Required At Other Elevations

2000 3000 4000 5000 6000 7000 8000 9000 10000424344454647

424445464748

434445474748

434445474749

434546474849

444547484849

444647484950

454748494950

464748495051

474850505152

5455565758

5455565859

5555565960

5555575960

5556576061

5556576062

5556586162

5656596263

5656596363

5657606364

From National Fuel Gas Code - Table F-4

Table 21

Table 20

High Altitude Kits Used With

BAYSWT08AHALTA

*UH2B/*DH2B080A9V3VA*UH2B/*DH2B080A9V4VA*UH2C/*DH2C100A9V4VA

*UH2C100A9V5VA*UH2D/*DH2D120A9V5VA

BAYSWT10AHALTA *UH2B/*DH2B060A9V3VA

Installation of this furnace at altitudes above 2000 ft(610m) shall be in accordance with local codes, or in theabsence of local codes, the National Fuel Gas Code, ANSIZ223.1/NFPA 54 or National Standard of Canada, NaturalGas and Propane Installation Code, CSA B149.1.Installation of this furnace at altitudes above 2000 ft (610m) shall be made in accordance with the listed highAltitude Conversion Kit available with this furnace.

36 18-CD26D1-13

Installer’s GuideElectrical ConnectionsMake wiring connections to the unit as indicated on enclosedwiring diagram. As with all gas appliances using electricalpower, this furnace shall be connected into a permanently liveelectric circuit. It is recommended that furnace be providedwith a separate “circuit protection device” electric circuit. Thefurnace must be electrically grounded in accordance with localcodes or in the absence of local codes with the NationalElectrical Code, ANSI/NFPA 70 or CSA C22.1 Electrical Code,if an external electrical source is utilized. The integratedfurnace control is polarity sensitive. The hot leg of the120V power supply must be connected to the black power leadas indicated on the wiring diagram.

Refer to the SERVICE FACTS literature and unit wiringdiagram attached to furnace.

1. Be sure power agrees with equipment nameplates. 2. Low voltage (24 volt wiring) to be No. 18 A.W.G. min. 3. Grounding of equipment must comply with local codes. 4. Set thermostat heat anticipator per unit wiring diagram. 5. These leads provide 115V. power for connection of electronic

air cleaner and humidifier MAX. load 1.0 amps each. 6. When a single stage heating thermostat without fan switch

is used, no wiring on "G" terminal is used. 7. W1 and W2 must be jumpered together for proper operation.

Second stage heat will begin based on IFC switch setting. 8. Set dip switches with power off per installation instructions

to set airflow and indoor fan off delays. 9. Continuous fan airflow can be increased by adding this jumper. 10. This wire is only for thermostats requiring connection to

transformer common terminal. 11. Optional humidistat is to be connected between R and BK. Factory installed jumper R

to BK on the circuit board must be cut if optional humidistat is used. The jumper must also be cut when applying an airflow command signal to the BK input such as with the variable speed single-zone and multi-zone system controllers. On single speed cooling only/non-heat pump systems, jumper Y to O for proper operation of the delay profiles and the humidistat. For two compressor or two speed systems, jumper YLo to O.

W14

SEE NOTE 10

SEE NOTE 9

Y1/Ylo

W14 JUMPERSEE NOTE 11

FIELD ADDED JUMPER W1 TO W2.

SEE FURNACE WIRING DIAGRAM FOR 2ND STAGE TIMING.

From Dwg. B342027 Rev. 1

SEE NOTE 6

B/C B/C

TO 115 V 1 PH.,60 HZ., POWERSUPPLY PERLOCAL CODES

HUM SEENOTE 5

EAC SEENOTE 5

FIELD WIRING DIAGRAM FOR VARIABLE SPEED 2 STAGE FURNACE1 STAGE HEATING

USING A 1 STAGE HEATING THERMOSTATNO COOLING

Figure 60

18-CD26D1-13 37

Installer’s Guide

1. Be sure power agrees with equipment nameplates.2. Low voltage (24 volt wiring) to be No. 18 A.W.G. min.3. Grounding of equipment must comply with local codes.4. Set thermostat heat anticipator per unit wiring diagram.5. These leads provide 115V. power for connection of electronic

air cleaner and humidifier MAX. load 1.0 amps each.6. This wire is only for thermostats requiring connection to

transformer common terminal.7. Continuous fan airflow can be increased by adding this jumper.8. Set dip switches with power off per installation instructions

to set airflow and indoor fan off delays.9. Optional humidistat is to be connected between R and BK. Factory

installed jumper R to BK on the circuit board must be cut if optionalhumidistat is used. The jumper must also be cut when applying an airflowcommand signal to the BK input such as with the variable speed single-zoneand multi-zone system controllers. On single speed cooling only/non-heat pumpsystems, jumper Y to O for proper operation of the delay profiles and the humidistat.For two compressor or two speed systems, jumper YLo to O.

W14

SEE NOTE 6


Y1/Ylo


SEE NOTE 7

B/C B/C


HUM SEENOTE 5

EAC SEENOTE 5

FIELD WIRING DIAGRAM FOR VARIABLE SPEED 2 STAGE FURNACE2 STAGE HEATING

USING A 2 STAGE HEATING THERMOSTATNO COOLING

Figure 61

38 18-CD26D1-13

Installer’s Guide

W14

OUTDOOR UNIT (NO TRANSFORMER)

SEE NOTE 6

SEE NOTE 7


Y1/Ylo


B/CB/C


HUM SEENOTE 5

EAC SEENOTE 5

FIELD WIRING DIAGRAM FOR VARIABLE SPEED 2 STAGE FURNACE1 STAGE HEATING, 1 STAGE COOLING

USING A 1 STAGE HEATING, 1 STAGE COOLING THERMOSTAT(OUTDOOR SECTION WITHOUT TRANSFORMER)

FIELD ADDED JUMPER W1 TO W2.

SEE FURNACE WIRING DIAGRAM FOR 2ND STAGE TIMING.

Figure 62

18-CD26D1-13 39

Installer’s Guide

W14

OUTDOOR UNIT (NO TRANSFORMER)

SEE NOTE 6

SEE NOTE 7

Y1/Ylo

SEE NOTE 9



B/CB/C


HUM SEENOTE 5

EAC SEENOTE 5


USING A 2 STAGE HEATING, 1 STAGE COOLING THERMOSTAT(OUTDOOR SECTION WITHOUT TRANSFORMER)

Figure 63

40 18-CD26D1-13

Installer’s Guide

BLK/TWIN W2 W1 R G B Y YLO O

BLK/TWIN

BK JUMPERW14

W2 W1 R G B Y YLO O

OFF

1

21

2

ON

HUMIDISTAT HOOKUPIf an optional Humidistat is to be connected between “R”and “BK”, the factory installed jumper between “R” and “BK”on the circuit board must be cut. If an optional Humidistat isused, the jumper must also be cut when applying an airflowcommand signal to the “BK” input such as with the variablespeed single-zone and multi-zone system controller. On singlespeed cooling only/ non-heat pump systems, jumper “Y” to “O”for proper operation of the delay profiles and the Humidistat.For two compressor or two speed systems, jumper “YLO” to“O”.

Figure 64

The factory installed jumper between“R” and “BK” on the circuit boardmust be cut if an optional Humidistatis installed.

Figure 65

W14

OUTDOOR UNIT NO. 2(NO TRANSFORMER)

OUTDOOR UNIT NO. 1(NO TRANSFORMER)

SEE NOTE 3

SEE NOTE 6

SEE NOTE 7


B/CB/C


HUM SEENOTE 5

EAC SEENOTE 5


(OUTDOOR SECTION WITHOUT TRANSFORMER)

18-CD26D1-13 41

Installer’s Guide

SEQUENCE OF OPERATIONComfort Control call for heat (2-Stage Comfort Control)Call for 1st Stage only:W1 Comfort Control contacts close signaling the controlmodule to run its self-check routine. After the control modulehas verified that the 1st Stage Pressure Switch contacts areopen and the Limit Switch(es) contacts are closed, the draftblower will be energized.

As the induced draft blower comes up to speed, the PressureSwitch contacts will close and the ignitor warm up period willbegin. The ignitor will heat for approx. 20 seconds, then theGas Valve is energized in 1st Stage to permit gas flow to theburners.

The flame sensor confirms that ignition has been achievedwithin the 4 second ignition trial period.

As the flame sensor confirms that ignition has been achieved,the delay to fan ON period begins timing and after approx. 45seconds the indoor blower motor will be energized at lowspeed and will continue to run during the heating cycle.

Call for 2nd Stage after 1st Stage:W2 Comfort Control contacts close signaling a call for 2ndStage Heat. After a 30 second delay, the induced draft blowerwill be energized on high speed and the 2nd Stage PressureSwitch contacts will close. The Gas Valve is energized in 2ndStage and the indoor blower motor in high speed.

2nd Stage satisfied, 1st Stage still called:W2 Comfort Control contacts open signaling that 2nd StageHeating requirements are satisfied.The induced draft blower is reduced to low speed allowing the2nd Stage Pressure Switch contacts to open and the GasValve is reduced to 1st Stage. The indoor blower motor isreduced to low speed.

1st stage satisfied:W1 Comfort Control contacts open signaling that 1st Stageheating requirements are satisfied. The Gas Valve will closeand the induced draft blower. The indoor blower motor willcontinue to run for the fan off period (Field selectable at 60,100, 140 or 180 seconds), then will be de-energized by thecontrol module.

Comfort Control call for heat (1-Stage Comfort Control)

W1/ W2 (jumpered) Comfort Control contacts close signalinga call for heat. 1st Stage sequence of operation remains thesame as above. 2nd Stage Heat will energize after the Stagedelay timer (10 minutes) has expired.

Comfort Control satisfied:W1/ W2 (jumpered) contacts close signaling the controlmodule to close the Gas Valve. The induced draft blower isswitched to low speed and de-energized after the post purgetimer has expired. The indoor blower motor will continue tooperate after the flames are extinguished and then isswitched to low heat speed for the FAN-OFF period.

Start-up and AdjustmentPreliminary Inspections

▲ WARNING!ELECTRIC SHOCK HAZARDDISCONNECT POWER TO THE UNIT BEFORE REMOVINGTHE BLOWER DOOR. ALLOW A MINIMUM OF 10 SECONDSFOR IFC POWER SUPPLY TO DISCHARGE TO 0 VOLTS.FAILURE TO FOLLOW THIS WARNING COULD RESULT INPROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

With gas and electrical power “OFF”

1. Duct connections are properly sealed

2. Filters are in place

3. Venting is properly assembled

4. Blower door is in place

Turn the toggle switch on the main gas valve within the unitto the “OFF” position (See Figures 54 - 56) . Turn theexternal main gas shutoff valve to “ON”. Purge the air fromthe gas lines. After purging, Check all gas connections forleaks with a soapy solution — DO NOT CHECK WITH ANOPEN FLAME. Allow 5 minutes for any gas that mighthave escaped to dissipate. LP Gas being heavier than airmay require forced ventilation. Turn the toggle switch on themain gas valve within the unit to the “ON” position.

Lighting Instructions

▲ WARNING!BURN HAZARDDO NOT ATTEMPT TO MANUALLY LIGHT THE BURNER.FAILURE TO FOLLOW THIS WARNING COULD RESULT INPROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

Lighting instructions appear on each unit. Each installationmust be checked out at the time of initial start up to insureproper operation of all components. Check out should includeputting the unit through one complete cycle as outlined below.

Turn on the main electrical supply and set the comfort controlabove the indicated temperature. The ignitor will automati-cally heat, then the gas valve is energized to permit the flowof gas to the burners. After ignition and flame is established,the flame control module monitors the flame and suppliespower to the gas valve until the comfort control is satisfied.

To shut offFor complete shutdown: Turn the toggle switch located on themain gas valve inside the unit to the "OFF" position and theexternal main gas shutoff valve to the “OFF” position (SeeFigures 54-56). Disconnect the electrical supply to the unit.

▲ CAUTION!If shutoff is done during the cold weather months, provisionsmust be taken to prevent freeze-up of all water pipes andwater receptacles.

Whenever your house is to be vacant, arrange to have some-one inspect your house for proper temperature. This is veryimportant during freezing weather. If for any reason yourfurnace should fail to operate damage could result, such asfrozen water pipes.

Control and Safety Switch AdjustmentsLIMIT SWITCH CHECK OUTThe limit switch is a safety device designed to close the gasvalve should the furnace become overheated. Since proper op-eration of this switch is important to the safety of the unit, itmust be checked out on initial start up by the installer.

To check for proper operation of the limit switches, set thethermostat to a temperature higher than the indicatedtemperature to bring on the gas valve.

42 18-CD26D1-13

Installer’s GuideNOTE TO INSTALLERReview warnings and the contents of USER’S INFORMA-TION MANUAL with the homeowner when installation iscomplete and equipment is ready to be turned over to thehomeowner for normal operation.

CONTROL AND SAFETY SWITCHADJUSTMENTLIMIT SWITCH CHECK OUTThe limit switch is a safety device designed to close the GasValve should the Furnace become overheated. Since properoperation of this switch is important to the safety of the unit,it must be checked out on initial start up by theinstaller.

To check for proper operation of the Limit Switches, set theComfort Control to a temperature higher than the indicatedtemperature to bring on the Gas Valve. Restrict the airflowby blocking the return air or by disconnecting the blower.When the Furnace reaches the maximum outlet temperatureas shown on the rating plate, the burners must shut off. Ifthey do not shut off after a reasonable time and overheatingis evident, a faulty Limit Switch is probable and the LimitSwitch must be replaced. After checking the operation of theLimit Control, be sure to remove the paper or cardboard fromthe return air inlet, or reconnect the blower. Refer to theService Facts for additional instructions.

INDOOR BLOWER TIMING

▲ WARNING!ELECTRIC SHOCK HAZARDDISCONNECT POWER TO THE UNIT BEFORE REMOVINGTHE BLOWER DOOR. ALLOW A MINIMUM OF 10 SECONDSFOR IFC POWER SUPPLY TO DISCHARGE TO 0 VOLTS.FAILURE TO FOLLOW THIS WARNING COULD RESULT INPROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

Heating: The Integrated Furnace Control (IFC) controls theVariable Speed Indoor Blower. The blower “on” time is fixedat 45 seconds after ignition. The FAN-OFF period is fieldselectable by dip switches #1 and #2 located on the Inte-grated Furnace Control between the 5-pin and 9-pin wireconnectors. The delay may be set at 60, 100, 140, or 180 sec-onds. The factory setting is 100 seconds (See unit wiringdiagram).

Cooling: The fan delay-off period is set by dip switches on theIntegrated Furnace Control. The options for cooling delay offis field selectable by dip switches #5 and #6.

The following table and graph explain the delay-off settings:

This unit is equipped with a blower door switch which cutspower to the blower and Gas Valve causing shutdown whenthe door is removed.

ROOM AIR COMFORT CONTROLHEAT ANTICIPATOR ADJUSTMENTSet the Comfort Control heat anticipator according to thecurrent flow measured, or the settings found in the notes onthe Furnace wiring diagram (found in the SERVICE FACTSor inside the furnace casing).

SWITCH SETTINGS SELECTION NOMINALAIRFLOW

5 - OFF 6 - OFF NONE SAME

5 - ON 6 - OFF 1.5 MINUTES 100% *

5 - OFF 6 - ON 3 MINUTES 50%

5 - ON 6 - ON EnhancedMode** 50 - 100%

* - This setting is equivalent to BAY24X045 relaybenefit.** - This selection provides ENHANCED MODE,which is a ramping up and ramping down of theblower speed to provide improved comfort, quiet-ness, and potential energy savings. See WiringDiagram notes on the unit or in the Service Factsfor complete wiring setup for ENHANCED MODE.The graph which follows, shows the rampingprocess.

See Wiring Diagram on the unit or in the Service Factsfor complete wiring setup for Enhanced Mode.

AIRFLOW ADJUSTMENT

▲ WARNING!CARBON MONOXIDE HAZARDOPERATION WITH THE DOOR REMOVED OR AJAR CANPERMIT THE ESCAPE OF DANGEROUS FUMES. ALLPANELS MUST BE SECURELY CLOSED AT ALL TIMES FORSAFE OPERATION OF THE FURNACE.FAILURE TO FOLLOW THIS WARNING COULD RESULT INPROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

Check inlet and outlet air temperatures to make sure theyare within the ranges specified on the Furnace rating name-plate. If the airflow needs to be increased or decreased, seethe Service Facts for information on changing the speed of theblower motor.

Table 22. FAN OFF -- DELAY OPTIONS

1

minute

3

minutes

7.5

minutes

OFF

50%50%

80%

Dehumidify

EfficiencyFast Cooling

100% if necessary

OFF

Figure 66

18-CD26D1-13 43

Installer’s GuideINSTRUCTIONS TO THE OWNERS

▲ WARNING!

EXPLOSION HAZARDIN THE EVENT THAT ELECTRICAL, FUEL OR ME-CHANICAL FAILURES OCCUR, SHUT OFF THE GASSUPPLY AT THE MANUAL GAS SHUT OFF VALVE,LOCATED ON THE SUPPLY GAS PIPING COMINGINTO THE FURNACE, BEFORE TURNING OFF THEELECTRICAL POWER TO THE FURNACE. CONTACTSERVICER.FAILURE TO FOLLOW THIS WARNING COULD RE-SULT IN PROPERTY DAMAGE, PERSONAL INJURYOR DEATH.BURNER BOX TEMPERATURE LIMIT DEVICEAll models are equipped with a manual reset temperaturelimit located on the Burner Box. In case of excessive tempera-ture, the limit will open and cause the circuit to open whichshuts off all flow of gas.

CONDITIONS THAT AFFECT SYSTEMOPERATION

1. EXCESSIVE COMBUSTION PRESSURE (WIND INEXCESS OF 40 M.P.H.) VENT OR FLUE BLOCKAGEOn a call for heat, the Variable Speed Draft Inducer mustfirst ramp up to speed and close the Pressure Switchbefore the ignition sequence is allowed to begin. If thePressure Switch does not close, the motor will ramp up tomaximum speed and continue to operate there for about1 minute.After one minute, the Integrated Furnace Control willturn the motor off for about 30 seconds and then back onin an attempt to reestablish proper operation. Thiscondition is indicative of a highly restricted or blockedinlet or outlet vent pipe or a failed Pressure Switch.If pressure against induced draft blower outlet becomesexcessive, the Pressure Switch will open. If the PressureSwitch is open for more than 3.5 seconds, the variablespeed draft inducer will speed up and attempt to closethe Pressure Switch. If the Pressure Switch is not closedwithin 12 seconds or if the maximum speed of the motoris reached, the draft inducer sends a Fault signal to theIntegrated Furnace Control. If the unit is operating inSecond Stage, an Inducer Fault will cause the FurnaceControl to transition the system to First Stage and itwill operate there for 10 minutes before attempting torun again in Second Stage. If the unit is operating inFirst Stage, an Inducer Fault will cause the FurnaceControl to shut the system down and wait 30 secondsbefore attempting to reestablish operation in FirstStage.

2. LOSS OF FLAMEIf loss of flame occurs during a heating cycle, or flame isnot present at the sensor, the flame control module willclose the Gas Valve. The Integrated Furnace Control willthen recycle the ignition sequence, then if ignition is notachieved, it will shut off the Gas Valve and lock out thesystem.

3. POWER FAILUREIf there is a power failure during a heating cycle, thesystem will restart the ignition sequence automaticallywhen power is restored, if the Comfort Control still callsfor heat.

4. GAS SUPPLY FAILUREIf loss of flame occurs during a heating cycle, the systemIntegrated Control Module will recycle the ignition sequence,then if ignition is not achieved, the Integrated ControlModule will shut off the Gas Valve and lock out the system.

5. INDUCED DRAFT BLOWER FAILUREPlease refer to the Variable Speed Draft Inducertroubleshooting manual for diagnostic assistance.

6. CONDENSATE DRAIN BLOCKAGEIf the condensate drain is blocked, either by debris,improper draining, or by freezing condensate, the pres-sure switch will receive a signal warning of the accumula-tion of condensate in the heat exchanger assembly. Thepressure switch contacts will open and remain open, notallowing unit operation. The unit will not operate untilthe condensate drain has been cleared, and the conden-sate flows freely.

7. RESET AFTER LOCKOUTWhen the Integrated Furnace Control has shut thesystem down and gone into lockout, the system must bemanually reset before the unit will restart. The systemcan be reset by turning the system power off for morethan 1 second, or by removing 24VAC from the control formore than 1 second, or by removing the Comfort Controlcall for heat for more than 1 second but less than 20seconds.

8. RESET AFTER BURNER BOX LIMIT SHUTDOWNIf the furnace shuts down, one thing that can be checkedis the burner box temperature limit switch. It is locatedon the bottom of the burner box. The vent and combus-tion air inlet terminations should be checked for block-age. If blockage exists, clear the problem and then thereset button may be depressed. If there is no blockageof the terminations, the limit switch must be resetby a qualified servicer.

INDOOR MOTOR MAINTENANCEDirect drive motors have bearings which are permanentlylubricated and under normal use, lubrication is not recom-mended.

The manufacturer has a policy of continuous product and product data improvement; it reserves the right tochange design and specifications without notice.

Trane6200 Troup HighwayTyler, TX 75707

For more information contactyour local dealer

Fault Code RecoveryOn power up, last 4 faults, if any, will be flashed on the redLED. The newest fault detected will flash first and the oldestlast. There will be a 2 second delay between fault codeflashes. Solid red LED error codes will not be displayed.

The Green LED will be on solid during last fault recovery.At any other time the control is powered, the Green LEDindicator light will operate as shown in Table 14 and the redLED will flash LitePort data (one flash) every 20 seconds.

INTEGRATED FURNACE CONTROLGREEN "STATUS" LED FLASH CODES

Flashing Slow --- Normal - No call for Heat

Flashing Fast --- Normal - Call for Heat

Table 25

Fault Code ResetThe last 4 fault codes can be erased from memory by power-ing up the control with “G” energized and then applying “R” tothe “W1” terminal 3 times within 6 seconds. The control willacknowledge the reset by turning on the red LED for 2 sec-onds.

IFC Error Flash Codes

Table 23

Red LitePortTM LEDGreen Status LED

Figure 67

INTEGRATED FURNACE CONTROL LED FLASH CODESRED LED - LitePortTM DATA - 1 FLASH EVERY 20 SECONDS2 Flashes --- RETRIES OR RECYCLES EXCEEDED3 Flashes --- INDUCER OR PRESSURE SWITCH ERROR4 Flashes --- OPEN LIMIT OR ROLLOUT SWITCH5 Flashes --- FLAME SENSED WHEN NO FLAME SHOULD BE PRESENT6 Flashes --- LINE REVERSE POLARITY7 Flashes --- GAS VALVE CIRCUIT ERROR8 Flashes --- WEAK FLAME9 Flashes --- OPEN INDUCER LIMIT ERRORGREEN LED - STATUSSlow Flash NORMAL, NO CALL FOR HEATFast Flash NORMAL, CALL FOR HEAT PRESENTGREEN and REDLED's on Continuously FUSE OPEN OR INTERNAL CONTROL FAILURE

Literature Order Number 18-CD26D1-13

File Number 18-CD26D1-13

Supersedes 18-CD26D1-12

Date 06/11

Documents

Installer's Guide - Upflow/ Horizontal and Downflow ......ANSI Z221.1/NFPA 54 and/or CSA B149.1 Natural Gas and Propane Installation Code. 9. After it has been determined that each