Trane DX1B040A9H21B, DX1B060A9H31B, DX1B080A9H31B, DX1D120A9H51B, DX1C100A9H31B User Manual

...

18- CD22D1- 8

Installer’s Guide

High Efficiency Single Stage Upflow/ Horizontal and Downflow/ Horizontal Gas-Fired, Direct Vent Condensing Furnaces

*UX1B040A9H21B *UX1B060A9H31B *UX1B080A9H31B *UX1C100A9H41B *UX1D120A9H51B

*__First letter may be “A” or “T”

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.

*UX1-H

*DX1B040A9H21B *DX1B060A9H31B *DX1B080A9H31B *DX1C100A9H31B *DX1D120A9H51B

*DX1-H

DOWNFLOW

UPFLOW

UPFLOW/HORIZONTAL

DOWNFLOW/HORIZONTAL

A341624P08

Installer’s Guide

▲

SAFETY SECTION

The following safety practices and precautions must be followed during the installation, servicing, and operation of this 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 as specified in “Location and Clearances” (page 4), of these instructions.

3. Provide adequate combustion and ventilation air to the furnace space as specified in “Air for Combustion and Ventilation” (pages 8-9), of these instructions.

4. Combustion products must be discharged outdoors. Connect this furnace to an approved vent system only, as specified in the “Venting” section (pages 13-

22), of these instructions.

5. Never test for gas leaks with an open flame. Use a commercially available soap solution made specifically for the detection of leaks to check all connections, as specified in “Gas Piping” (pages 29-30), of these instructions.

6. Always install the furnace to operate within the furnace’s intended temperature-rise range with a duct system which has an external static pressure within the allowable range, as specified on the unit rating plate. Airflow with temperature rise for cfm versus static is shown in the Service Facts accompanying this furnace.

7. When a furnace is installed so that supply ducts carry air circulated by the furnace to areas outside the space containing the furnace, the return air shall also be handled by a duct(s) sealed to the furnace casing and terminating outside the space containing the furnace.

8. A gas-fired furnace for installation in a residential garage must be installed as specified in “Location and Clearances” section (page 4), of these instructions.

9. The furnace may be used for temporary heating of buildings or structures under construction only when the following conditions have been met: a. The furnace venting system must be complete

and installed per manufacturers instructions.

b. The furnace is controlled only by a room ther-

mostat (no field jumpers).

c. The furnace return air duct must be complete

and sealed to the furnace and clean air filters are in place.

d. The furnace input rate and temperature rise

must be verified to be within nameplate marking.

e. 100% of the furnace combustion air requirement must come from outside the structure. f. The furnace return air temperature range is between 55 and 80 degrees Fahrenheit. g. Clean the furnace, duct work, and components upon substantial completion of the construction process, and verify furnace operating conditions including ignition, input rate, temperature rise and venting, according to the manufacturer's instructions.

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

WARNING

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 CAN/CGA B149 Installation Codes 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. 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 CAN/CGA B149.1 Installation Codes.

8. After it has been determined that each appliance connected to the venting system properly vents where tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas-fired burning appliance to their previous conditions of use.

Installer’s Guide

▲

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

a. WARNING indicates a potentially hazardous situation

which, if not avoided, could result in death or serious injury.

b. CAUTION indicates a potentially hazardous situation

which, if not avoided, may result in minor or moderate injury. It is also used to alert against unsafe practices and hazards involving only property damage.

WARNING

FIRE OR EXPLOSION HAZARD Failure to follow the safety warnings exactly could result in serious injury, death or property damage. Improper servicing could result in dangerous operation, serious injury, death, or property damage.

GENERAL INSTALLATION INSTRUCTIONS

The manufacturer assumes no responsibility for equipment installed in violation of any code or regulation. It is recommended that Manual J of the Air Conditioning Contractors Association (ACCA) or A.R.I. 230 be followed in estimating heating requirements. When estimating heating requirements for installation at altitudes above 2000 ft., remember the gas input may need to be reduced (See High Altitude Installation).

Material in this shipment has been inspected at the factory and released to the transportation agency without known damage. Inspect exterior of carton for evidence of rough handling in shipment. Unpack carefully after moving equipment to approximate location. If damage to contents is found, report the damage immediately to the delivering agency.

Codes and local utility requirements governing the installation of gas fired equipment, wiring, plumbing, and flue connections must be adhered to. In the absence of local codes, the installation must conform with latest edition of the National Fuel Gas Code ANSI Z223.1 • National Installation Code, CAN/CGA B149.1. The latest code may be obtained from 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 IV furnaces in accordance with latest edition of ANSI Z21.47 • CAN/ CGA 2.3 standards.

Contents

INSTALLATION INSTRUCTIONS

General Installation Instructions 3 Location and Clearances 4 Outline Drawings 5 Upflow Installation 7 Downflow Installation 7 Horizontal Installation 7 Air For Combustion and Ventilation 8 Duct Connections 10 Return Air Filters 11 General Venting Instructions 14 Venting Material 15 Venting Tables 15 Horizontal Venting 16 Venting Through The Wall 20 Venting Through The Roof 20 Downward Venting 22 Venting Through a Masonry Chimney 22 Condensate Drain Instructions 25 Electrical Connections 27 Field Wiring Diagrams 27 Gas Piping 29 Combustion Input Checks 31

Start Up and Adjustment 33

Preliminary Inspections 33 Lighting Instructions 34 Sequence Of Operation 34 Control And Safety Switch Adjustments 34 Airflow Adjustment 35

Conditions Affecting Furnace Operation 35

IFC Error Flash Code 37

Category IV furnaces operate with positive vent static pressure and with a flue loss less than 17 percent. These conditions require special venting systems, which must be gas tight and water tight. These Category IV Direct Vent furnaces are approved for installation in Manufactured/Mobile housing when used with BAYMFGH100A.

18-CD22D1-8 3

Installer’s Guide

▲

CAUTION

To prevent shortening its service life, the furnace should not be used as a “Construction Heater” during the finishing phases of construction until the requirements listed in item 9, a-g of the safety section of this publication have been met. Condensate in the presence of chlorides and fluorides from paint, varnish, stains, adhesives, cleaning compounds, and cement create a corrosive condition which may cause rapid deterioration of the heat exchanger.

CAUTION

Do NOT install the furnace in a corrosive or contaminated atmosphere.

WARNING

EXPLOSION HAZARD! PROPANE 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.

NOTE: The manufacturer of your furnace does NOT test

any detectors and makes no representations regarding any brand or type of detector.

LOCATION AND CLEARANCES

The location of the furnace is normally selected by the architect, the builder, or the installer. However, before the furnace is moved into place, be sure to consider the following requirements:

1. Is the location selected as near the vent and as centralized for heat distribution as practical?

2. Do all clearances between the furnace and enclosure equal or exceed the minimums shown in the Table 1.

3. Is there sufficient space for servicing the furnace and other equipment? A minimum of 24 inches front accessibility to the furnace must be provided. Any access door or panel must permit removal of the largest component.

4. Are there at least 3 inches of clearance between the furnace front panel and any closed panel or door provided?

5. Are the vent pipe and combustion air inlet pipe within vent table lengths? Will the pipes remain unobstructed?

6. Allow sufficient height in supply plenum above or below the furnace to provide for cooling coil installation if the cooling coil is not installed at the time of this furnace installation.

7. A furnace shall be installed so electrical components are protected from water.

8. If the furnace is installed in a residential garage, it must be installed so that the burners and the ignition source are located not less than 18 inches (46 cm) above the floor and the furnace must be located or protected to avoid physical damage from vehicles.

MPORTANT:

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

4 18-CD22D1-8

Installer’s Guide

From Dwg. 21C341884 Rev. 1

(ALL DIMENSIONS ARE IN INCHES)

*UX1-H OUTLINE DRAWING

18-CD22D1-8 5

Installer’s Guide

From Dwg. 21C341885 Rev. 0

(ALL DIMENSIONS ARE IN INCHES)

*DX1-H DOWNFLOW/ HORIZONTAL OUTLINE DRAWING

6 18-CD22D1-8

UPFLOW INSTALLATION

▲

Standoffs and screws (See Figure 1) are included with the cased coils for attachment to the furnace. There are clearance alignment holes near the bottom of the coil wrapper. Drill screws are used to engage the furnace top flanges. The standoff is inserted into the cabinet alignment hole. The drill screws are inserted through the standoffs then screwed into the furnace flange. The coil is always placed downstream of the furnace airflow.

CASED

UPFLOW

FURNACE

STANDOFFS (4)

COIL

STANDOFFS

(BOTH SIDES)

DRILL SCREWS (4)

FOR VERTICAL

INSTALLATIONS:

SCREWS

(BOTH SIDES)

DOWNFLOW INSTALLATIONS

WARNING

Do NOT install the furnace directly on carpeting, tile or other combustible material other than wood flooring. For vertical downflow application, subbase (BAYBASE205) must be used between the furnace and combustible flooring. When the downflow furnace is installed vertically with a cased coil, a subbase is not required.

Required floor opening:

Installer’s Guide

2345678901234567890123456789012123456789012345

FURNACE

2345678901234567890123456789012123456789012345

FRONT

2345678901234567890123456789012123456789012345

HORIZONTAL INSTALLATION

The coil and furnace must be fully supported when used in the horizontal position. It is always recommended that an auxiliary drain pan be installed under a horizontally installed evaporator coil or 90% gas furnace. Connect the auxiliary drain line to a separate drain line (no trap is needed in this line). Three brackets (with screws) are included with downflow furnaces for installation to stabilize and secure the furnace and TXC cased coil in the horizontal posi- tion. See Figure 4.

IMPORTANT: The 2/4TXC cased coil must be placed downstream of the furnace. In horizontal installations, the apex of the coil may point either toward or away from the furnace. See

the 2/4TXC coil Installer's Guide for more details.

The cased coil is secured to the furnace and both the furnace and the cased coil must be properly supported. The brackets mount using the rear screws on the coil case and use the screws provided to secure the bracket to the furnace. The remaining bracket is placed as close to center as possible (horizontally) between the coil case front and the furnace bottom channel (for downflow/ horizontal furnace). Use four of the screws provided to secure the bracket. The upflow furnace, converted to horizontal, aligns and attaches the TXC coil as in Figure 1. However, the coil requires additional support.

CASED COIL CONNECTION

BRACKET FOR DOWNFLOW

FURNACE IN HORIZONTAL

A (width)

B (depth)

DOWNFLOW ONLY

The furnace may be installed in an attic or crawl space in the horizontal position by placing the furnace on the left side (as viewed from the front in the vertical position). The horizontal furnace installation in an attic should be on a service platform large enough to allow

SUBBASE CROSS SECTION

TABLE 1

CABINET

WIDTH

RETURN

DUCT WIDTH

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"

FLOOR OPENING PLENUM OPENING

"A" "B" "C" "D"

18-CD22D1-8 7

for proper clearances on all sides and service access to the front of the furnace (See Figure 4 & Clearance Table). Line contact is only permissible between lines formed by intersections of the top and two sides of the furnace casing and building joists, studs, or framing.

Installer’s Guide

The furnace may be placed horizontally in a crawl space on a pad or other noncombustible material which will raise the unit for sufficient protection from moisture.

The furnace must be supported at both ends and the middle when installed horizontally.

UPFLOW/ HORIZONTAL SHOWN

The furnace must also be elevated a minimum of 6 inches to allow clearance for the condensate drain to exit the cabinet in the horizontal position.

The horizontal furnace may also be suspended from the joists using 3/8" all-thread rods with pieces of angle iron underneath the furnace to form a hanging rack at both ends and the midpoint. The rods need to be of sufficient length to allow for proper clearances from combustible materials. The angle iron needs to be at least 32" in length to allow for access to service panels.

50 CU. FT. OR MORE PER 1000 BTU/HR. INPUT ALL EQUIP. INSTALLED

UNCONFINED

Provisions for combustion and ventilation air shall be made in accordance with latest edition of Section 5.3, Air for Combustion and Ventilation, of the National Fuel Gas Code, ANSI Z223.1 — CAN/CGA B149.1 or applicable provisions of the local building codes. Special conditions created by mechanical exhausting of air and fireplaces must be considered to avoid unsatisfactory furnace operation.

OUTSIDE AIR IS RECOMMENDED

The use of indoor air for most applications is acceptable, unless there is the presence of corrosive chemicals

or contamination. Certain types of installation will require the use of outside air for combustion.

The following types of installations will require use of OUTDOOR AIR for combustion, due to chemical exposures: * Commercial buildings * Buildings with indoor pools * Furnaces installed in “confined” laundry rooms * Furnaces installed in “confined” hobby or craft rooms * Furnaces installed near chemical storage areas.

Exposure to the following substances in the combustion air supply will also require OUTDOOR AIR for combustion: * 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

AIR FOR COMBUSTION AND VENTILATION

If these furnaces are installed in a nondirect vent capacity then the adequate flow of combustion and ventilating air must not be obstructed from reaching the furnace. Air openings provided for combustion air must be kept free of obstructions which restrict the flow of air. Airflow restrictions affect the efficiency and safe operation of the furnace. Keep this in mind should you choose to remodel or change the area which contains your furnace. Furnaces must have a free flow of air for proper performance.

8 18-CD22D1-8

Furnace locations may be in a “confined space” or an “unconfined space”.

Unconfined space

may have adequate air by infiltration to provide air for combustion and ventilation. Buildings with tight construction (for example, weather stripping, heavily insulated, caulked, vapor barrier, etc.), may need additional air to be provided as described for confined space.

Confined spaces

ft. of space per 1000 BTU/ hr input from all equipment installed. Air for combustion and ventilation requirements can be supplied from inside the building as in Figure 8 or from the outdoors, as in Figure 9.

is defined in Figure 5. These spaces

are installations with less than 50 cu.

Installer’s Guide

MAXIMUM BTUH

MINIMUM AREA IN SQUARE FEET

FOR UNCONFINED SPACE INSTALLATIONS

FURNACE

MINIMUM AREA IN SQUARE FEET

INPUT RATING

60,000

80,000 100,000 120,000

WITH 8 FT. CEILING

OF UNCONFINED SPACE

375 500 625 875

1. All air from inside the building as in Figure 8: The confined space shall be provided with two permanent openings communicating directly with an additional room(s) of sufficient volume so that the combined volume of all spaces meets the criteria for an unconfined space. The total input of all gas utilization equipment installed in the combined space shall be considered in making this determination. Refer to Table 2 for minimum open areas requirements.

CONFINED

SPACE

All air from outdoors as in Figure 9: The confined space shall be provided with two permanent openings, one commencing within 12 inches of the top and one commencing 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 freely communicate with the outdoors. Refer to Table 2, for minimum open areas requirements.

Air

From

Inside

100 100 100 120

TABLE 2

Air From Outside

Vertical

Duct

15 20 25 30

Horizontal

Duct

30 40 50 60

MINIMUM FREE AREA IN SQUARE INCHES

EACH OPENING (FURNACE ONLY)

Furnace

Maximum

BTUH/INPUT

Rating

60,000

80,000 100,000 120,000

18-CD22D1-8 9

Installer’s Guide

DUCT CONNECTIONS

Air duct systems should be installed in accordance with standards for air conditioning systems, National Fire Protection Association Pamphlet No. 90. They should be sized in accordance with ACCA Manual D or whichever is applicable. Central furnaces, when used in connection with cooling units, shall be installed in parallel or on the upstream side of the cooling coil to avoid condensation in the heat exchanger. With a parallel flow arrangement, the dampers or other means used to control flow of air shall be adequate to prevent chilled air from entering the furnace, and if manually operated, must be equipped with means to prevent operation of either unit unless the damper is in full heat or cool position. On any job, flexible connections of nonflammable material may be used for return air and discharge connections to prevent transmission of vibration. Though these units have been specifically designed for quiet, vibration free operation, air ducts can act as sounding boards and could, if poorly installed, amplify the slightest vibration to the annoyance level. When the furnace is located in a utility room adjacent to the living area, the system should be carefully designed with returns to minimize noise transmission through the return air grille. Although these furnaces are designed with large blowers operating at moderate speeds, any blower moving a high volume of air will produce audible noise which could be objectionable when the unit is located very close to a living area. It is often advisable to route the return air ducts under the floor or through the attic. Such design permits the installation of air return remote from the living area (i.e. central hall). When the furnace is installed so that the supply ducts carry air circulated by the furnace to areas outside the space containing the furnace, the return air shall also be handled by a duct(s) sealed to the furnace and terminating outside the space containing the furnace.

RETURN AIR DUCT SYSTEMS Where there is no complete return duct system, the return connection must be run full size from the furnace to a location outside the utility room, basement, attic, or crawl space. Do Not install return air through the back of the furnace

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

NOTE: Minimum return air temperature is 55° F.

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

PREPARATION FOR UPFLOW BOTTOM AND SIDE RETURN AIR FILTER INSTALLATION

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

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

2. The return air filter and rack are shipped in either the bottom or side location. Remove the filter and filter rack by first turning the two latches on the blower door and tilting the door forward to remove. Remove the filter by sliding it out of the rack. Compress the spring loaded filter rack to disengage the retaining pins/screws from the furnace sides and slide the filter rack out.

The filter rails are spring loaded for automatic adjustment to allow standard size, locally obtainable replacement filters. The filter rack itself slides to adjust to the required width needed for bottom or side return.

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

4. The side panels of the upflow furnace include locating notches that are used as guides for cutting an opening for return air, refer to Figure 10 and the outline drawing on page 5 for duct connection dimensions for various furnaces.

5. If a 3/4" flange is to be used for attaching the air inlet duct, add to cut where indicated by dotted lines in Figure 10. Cut corners diagonally and bend outward to form flange.

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

10).

7. The bottom panel of the upflow furnace must be removed for bottom return air. After removing the filter and filter rack, lay the furnace on its back. Remove the two 5/16" hex screws securing the front of the bottom channel to the cabinet. Rotate the channel downward (or remove by lowering the front edge of the channel and pulling forward). Slide the bottom return air panel out of the cabinet. Rotate the front channel to its original position and reinstall the two 5/16” screws.

8. The filter retainer is factory supplied for upflow bottom return. Use the filter retainer on side or bottom if filter is to be used within the furnace cabinet on upflow only installations.

10 18-CD22D1-8

Installer’s Guide

9. The horizontal installation of the upflow furnace requires an external filter section. Do NOT use the bottom return filter within the furnace. Filter kits are available for horizontal applications.

10. Connect duct work to furnace. See Outline Drawing for supply and return duct size and location. Flexible duct connectors are recommended to connect both supply and return air ducts to the furnace. If only the front of the furnace is accessible, it is recommended that both supply and return air plenums are removable.

RETURN AIR FILTERS

TYPICAL UPFLOW RETURN AIR FILTER INSTALLATIONS

furnaces require high velocity type air filters. The filters may be installed within the furnace blower compartment for UPFLOW furnaces in either a BOTTOM or SIDE (left side or right side) return air inlet. Some filters may need to be trimmed for side or bottom filter use.

LOCATING NOTCHES PROVIDED FOR SIDE RETURN CUTOUT

SEE OUTLINE DRAWING

UPFLOW FURNACE ONLY

CUT OUT FOR SIDE FILTER

FRONT of Furnace

TABLE 3

MODELS

NUMBERS

*UX1B040A9H21B *UX1B060A9H31B *UX1B080A9H31B

*UX1C100A9H41B 21" 1 - 20" X 25" X 1"

*UX1D120A9H51B 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

CABINET

WIDTH

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

FILTER

QTY & SIZE

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

The furnace and the bottom filter rack installation can be seen in Figure 11. The furnace filter in the bottom or side configuration can be removed by simply turning the two latches on the blower door and tilting the door forward.

OPTIONAL FILTER RACK INSTALLATION FOR BOTTOM RETURN

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

a. Remove the filter.

b. Remove the filter rack.

c. Remove the bottom panel.

e. With the filter removed, the filter rack is com-

pressed and then inserted into the bottom of the furnace. The retaining screw/pin on each side inserts into engagement holes at the bottom of the furnace cabinet side. See Figure 12.

f. Reinstall the furnace filter in the bottom posi-

tion by inserting the chamfer end first into the filter rack

Filter Rack Retaining

Furnace

Cabinet

Side

Screw/Pin

Filter Rack

Airflow

Engagement Hole

For

Filter Rack

BOTTOM FILTER RACK INSTALLATION

18-CD22D1-8 11

Installation With

Bottom Return

Bottom Panel

Installer’s Guide

Airflow

FILTER RACK INSTALLATION FOR SIDE RETURN AIR ON UPFLOW FURNACES (Left or Right)

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

a. Remove the filter.

b. Remove the filter rack.

c. Leave the bottom panel in place.

e. Make side cutout by following the directions in

the “Return Air Duct Connections” section on page 10.

e. Compress the filter rack and reinstall in the

side position on the furnace. Confirm that the upper retaining pin/screw locks into the engagement hole in the blower deck and the lower pin/ screw rests against the side of the bottom panel. See Figures 13-16.

f. Reinstall the furnace filter in the side position by

inserting the chamfer end first into the filter rack.

SIDE

CUTOUT

Airflow

RETAINING

(Both Sides)

SPRINGS

BLOWER

Engagement Hole For

Filter Rack Installation With Side

Return

Furnace Blower Deck

DECK

Furnace

Cabinet

Side

Filter Rack Retaining Screw/Pin

Filter Rack Assembly

Filter

Furnace

Rack

Cabinet

Side

Filter Rack Retaining Screw/Pin

Engagement Hole For

Filter Rack Installation With Bottom Return

Conversion kits for horizontal filters are BAYFLTR203 for 17 1/2" width cabinets, BAYFLTR204 for 21" width cabinets, and BAYFLTR205 for 24" width cabinets. These include filters and brackets necessary for horizontal filters. In addition, optional door kit BAYFLTR206 is also available. See Figures 17 and 19.

FILTER

RACK RAILS

BOTTOM

PANEL

INSTALLED

RETURN AIR FILTERS FOR UPFLOW FURNACE IN HORIZONTAL CONFIGURATION

When the Upflow Furnace is installed in the horizontal configuration, the return air filters must be installed

Typical Upflow Left Side Return Filter Rack Installation

SIDE

Airflow

Typical Upflow Right Side Return Filter Rack Installation

12 18-CD22D1-8

BOTTOM

PANEL

INSTALLED

FILTER

CUTOUT

RETAINING

(Both Sides)

SPRINGS

RACK RAILS

exterior to the furnace cabinet. Remote filter grilles may be used for homeowner convenience or the filters may be installed in the duct work upstream of the furnace. See Figure 17.

Airflow

Optional door kit BAYFLTR206

Typical Horizontal Filter Installation

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