INSTALLATION INSTRUCTIONS 80% Variable---Speed Category I, Non--Condensing 33--1/3 in. Gas Furnace F80CTL and G80CTL (Series A) SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . 2 AIR DELIVERY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 CODES AND STANDARDS . . . . . . . . . . . . . . . .
SAFETY CONSIDERATIONS ! WARNING FIRE, EXPLOSION, ELECTRICAL SHOCK, AND CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in dangerous operation, personal injury, death, or property damage. Improper installation, adjustment, alteration, service, maintenance, or use can cause carbon monoxide poisoning, explosion, fire, electrical shock, or other conditions which may cause personal injury or property damage.
A10269 Fig. 1 -- Clearances to Combustibles 441 01 3500 00 Specifications are subject to change without notice.
INTRODUCTION 80 / 27 C 60 / 16 C A06745 Duct Systems Air Conditioning Contractors Association (ACCA) Manual D, Sheet Metal and Air Conditioning Contractors National Association (SMACNA), or American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE) 2001 Fundamentals Handbook Chapter 34 or 2000 HVAC Systems and Equipment Handbook Chapters 9 and 16.
A190065 Fig. 3 -- Dimensional Drawing Table 1 – Dimensions -- In. (mm) FURNACE SIZE A CABINET WIDTH B OUTLET WIDTH C TOP AND BOTTOM FLUE COLLAR D BOTTOM INLET WIDTH VENT CONNECTION SIZE SHIP WT. LB (KG) 0451712 17 ---1/2 (445) 15 ---7/8 (403) 11 ---9/16 (294) 16 (406) 4 (102) 118 (53.5) 0701412 14 ---3/16 (360) 12 ---9/16 (319) 9 ---5/16 (237) 12 ---11/16 (322) 4 (102) 118 (53.5) 0701716 17 ---1/2 (445) 15 ---7/8 (403) 11 ---9/16 (294) 16 (406) 4 (102) 126 (57.
THE BLOWER IS LOCATED BELOW THE BURNER SECTION, AND CONDITIONED AIR IS DISCHARGED UPWARD. THE BLOWER IS LOCATED TO THE RIGHT OF THE BURNER SECTION, AND AIR CONDITIONED AIR IS DISCHARGED TO THE LEFT. THE BLOWER IS LOCATED TO THE LEFT OF THE BURNER SECTION, AND CONDITIONED AIR IS DISCHARGED TO THE RIGHT. THE BLOWER IS LOCATED ABOVE THE BURNER SECTION, AND CONDITIONED AIR IS DISCHARGED DOWNWARD A02097 Fig.
! CAUTION PERSONAL INJURY AND/OR PROPERTY DAMAGE HAZARD Improper use or installation of this furnace may result in premature furnace component failure. This gas furnace may be used for heating buildings under construction provided that: 18-IN. (457.2 mm) MINIMUM TO BURNERS A93044 Fig. 5 -- Installation in a Garage ! --The furnace is permanently installed with all electrical wiring, piping, venting and ducting installed according to these installation instructions.
Table 2 – Minimum Free Area Required for Each Combustion Air opening of Duct to Outdoors FURNACE INPUT (BTUH) 44,000 66,000 88,000 110,000 132,000 TWO HORIZONTAL DUCTS (1 SQ. IN./2,000 BTUH) (1,100 SQ. MM/KW) Free Area of Opening Round Duct and Duct Dia. Sq. In. (Sq. mm) In. (mm) 22 (14194) 6 (152) 33 (21290) 7 (178) 44 (28387) 8 (203) 55 (35484) 9 (229) 66 (42580) 10 (254) SINGLE DUCT OR OPENING (1 SQ. IN./3,000 BTUH) (734 SQ. MM/KW) Free Area of Opening Round Duct and Duct Dia. Sq. In. (Sq. mm) In.
1 SQ IN. PER 4000 BTUH* 1 SQ IN. PER 2000 BTUH* (305mm) 12″ MAX A 1 SQ IN. PER 4000 BTUH* INTERIOR HEATED SPACE 1 SQ IN. PER 4000 BTUH* E 12″ (305mm) MAX C DUCT TO OUTDOORS 12" MAX (305mm) 1 SQ IN. PER 1000 BTUH* IN DOOR OR WALL UNCONFINED SPACE 6" MIN (152mm) (FRONT)Ü 1 SQ IN. PER 1000 BTUH* IN DOOR OR WALL G 12" MAX (305mm) 12″ MAX (305mm) CIRCULATING AIR DUCTS VENT THROUGH ROOF CLEARANCE IN FRONT OF COMBUSTION AIR OPENINGS SHALL BE AT LEAST 3 IN.
Infiltration rates greater than 0.60 ACH shall not be used. The minimum required volume of the space varies with the number of ACH and shall be determined per Table 3 or Equations 1 and 2. Determine the minimum required volume for each appliance in the space and add the volumes together to get the total minimum required volume for the space. Table 3 -- Minimum Space Volumes were determined by using the following equations from the National Fuel Gas Code ANSI Z223.1/NFPA 54, 9.3.2.2: 1.
NOTE: It is recommended that the perforated supply--air duct flanges be completely folded over or removed from furnace when installing the furnace on a factory--supplied cased coil or coil box. To remove the supply--air duct flange, use wide duct pliers or hand seamers to bend flange back and forth until it breaks off. Be careful of sharp edges. (See Fig. 14.) Bottom Return Air Inlet These furnaces are shipped with bottom closure panel installed in bottom return--air opening.
FURNACE (OR COIL CASING WHEN USED) COMBUSTIBLE FLOORING A PLENUM OPENING D B DOWNFLOW SUBBASE SHEET METAL PLENUM FLOOR OPENING FLOOR OPENING C A96285 A96283 Fig. 11 -- Floor and Plenum Opening Dimensions Roll--Out Protection Provide a minimum 17--3/4--in. X 22--in. (451 X 559 mm) piece of sheet metal for flame roll--out protection in front of burner area for furnaces closer than 12--in. (305 mm) above the combustible deck or suspended furnaces closer than 12--in. (305 mm) to joists.
Table 4 – Opening Dimensions -- In. (mm) FURNACE CASING WIDTH IN.
Upflow and Horizontal Furnaces Connect supply--air duct to flanges on furnace supply--air outlet. Bend flange upward to 90_ with wide duct pliers. (See Fig. 14.) The supply--air duct must be connected to ONLY the furnace supply--outlet--air duct flanges or air conditioning coil casing (when used). DO NOT cut main furnace casing side to attach supply air duct, humidifier, or other accessories. All accessories MUST be connected to duct external to furnace main casing.
/4" (6mm) THREADED ROD 4 REQ. 1 OUTER DOOR ASSEMBLY SECURE ANGLE IRON TO BOTTOM OF FURNACE WITH 3 #8 x 3/4" (19mm) SCREWS TYPICAL FOR 2 SUPPORTS 8" (203mm) MIN FOR DOOR REMOVAL 1” (25mm) SQUARE, 1-1/4”x1-1/4”x1/8” (32x32x3mm) ANGLE IRON OR UNI-STRUT MAY BE USED (2) HEX NUTS, (2) WASHERS & (2) LOCK WASHERS REQ. PER ROD A10130 Fig. 15 -- Horizontal Unit Suspension METHOD 2 USE (4) #8 x 3/4 (19 mm) SHEET METAL SCREWS FOR EACH STRAP.
LINE CONTACT ONLY PERMISSIBLE BETWEEN LINES FORMED BY INTERSECTIONS OF THE TOP AND TWO SIDES OF THE FURNACE JACKET AND BUILDING JOISTS, STUDS, OR FRAMING. 17 3/4″ (451mm)OVERALL 4 3/4″ (121mm) UNDER DOOR 1″ (25mm) UNDER FURNACE GAS ENTRY 6″ M IN TYPE-B VENT m) 52m * (1 EXTEND OUT 12″ (305mm) FROM FACE OF DOOR 30-IN. (762mm) MIN WORK AREA * WHEN USED WITH SINGLE WALL VENT CONNECTIONS 17 3/4″ (451mm) SHEET METAL 559 22″ ( mm ) EQUIPMENT MANUAL SHUT-OFF GAS VALVE SEDIMENT TRAP UNION A10164 Fig.
A02163 Fig. 19 -- Downflow Return Air Configurations and Restrictions A02162 Fig. 20 -- Horizontal Return Air Configurations and Restrictions 441 01 3500 00 Specifications are subject to change without notice.
Table 5 – Air Delivery -- CFM (With Filter)* (SW1--- 5 and SW4--- 3 set to OFF, except as indicated. See notes 1 and 2.) Unit Size: 0451712 Clg Switches SW2---3 SW2---2 SW2---1 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.
Air Delivery -- CFM continued (with Filter)* (SW1--- 5 and SW4--- 3 set to OFF, except as indicated. See notes 1 and 2.) Unit Size: 0701716 Clg Switches Clg Default: SW2---3 OFF SW2---2 OFF SW2---1 OFF CF Switches SW3--- 3 SW3--- 2 SW3--- 1 Low--- Clg Default: OFF OFF Cooling Airflow (SW2) Low--- Cooling Airflow (SW3) OFF OFF OFF ON ON ON ON OFF ON ON OFF OFF ON ON Maximum Clg Airflow2 0.1 1435 0.2 1435 0.3 1435 0.4 1420 0.5 1380 0.6 1345 0.7 1310 0.8 1270 0.9 1235 1.
Air Delivery -- CFM continued (with Filter)* (SW1--- 5 and SW4--- 3 set to OFF, except as indicated. See notes 1 and 2.) Unit Size: 0901716 Clg Switches Clg Default: SW2---3 OFF SW2---2 OFF SW2---1 OFF CF Switches SW3--- 3 SW3--- 2 SW3--- 1 Low--- Clg Default: OFF OFF Cooling Airflow (SW2) Low--- Cooling Airflow (SW3) OFF OFF OFF ON ON ON ON OFF ON ON OFF OFF ON ON Maximum Clg Airflow2 0.1 1350 0.2 1370 0.3 1390 0.4 1390 0.
Air Delivery -- CFM continued (with Filter)* (SW1--- 5 and SW4--- 3 set to OFF, except as indicated. See notes 1 and 2.) Unit Size: 1102120 Clg Switches Clg Default: CF Switches Low--- Clg Default: Cooling Airflow (SW2) Low--- Cooling Airflow (SW3) CF Switches Cont. Fan Default: Continuous Fan Airflow (SW3) SW2---3 OFF SW3--- 3 OFF SW2---1 OFF SW3--- 1 OFF 0.1 1750 0.2 1750 0.3 1750 0.4 1750 0.
GAS PIPING ! Table 6 – Maximum Capacity of Pipe NOMINAL IRON PIPE SIZE IN. (MM) WARNING LENGTH OF PIPE --- FT (M) INTERNAL DIA. IN. (MM) 1/2 (12.7) 0.622(158) 10 (3.0) 175 3/4 (19.0) 0.824 (20.9) 360 250 200 170 151 Failure to follow this warning could result in personal injury, death, and/or property damage. 1 ( 25.4) 1.049 (26.6) 680 465 375 320 285 1.380 (35.0) 1400 950 770 660 580 Never purge a gas line into a combustion chamber. Never test for gas leaks with an open flame.
furnace gas control valve and accessible manual equipment shutoff valve before and during supply pipe pressure test. After all connections have been made, purge lines and check for leakage at furnace prior to operating furnace. The gas supply pressure shall be within the maximum and minimum inlet supply pressures marked on the rating plate with the furnace burners ON and OFF. See Fig. 25 for field wiring diagram showing typical field 115--v wiring.
Table 7 – Electrical Data FURNACE SIZE 0451712 0701412 0701716 0702120 0901716 0902120 1102120 1352422 VOLTS--HERTZ--PHASE OPERATING VOLTAGE RANGE* Max. Min. MAX. UNIT AMPS UNIT AMPACITY # MAX. WIRE LENGTH --- FT (M)} MAX. FUSE OR CKT BKR AMPS { MIN. WIRE GAUGE 115 ---60 ---1 127 104 9.0 12.0 30 (9.4) 15 14 115 ---60 ---1 127 104 9.0 12.0 30 (9.4) 15 14 115 ---60 ---1 127 104 9.0 13.0 28 (8.7) 15 14 115 ---60 ---1 127 104 14.1 18.4 31 (9.
5. Pull furnace power wires out of 1/2--in. (12 mm) diameter hole in J--Box. Do not loosen wires from strain--relief wire--tie on outside of J--Box. 6. Route furnace power wires through holes in casing and electrical box and into electrical box. 7. Pull field power wires into electrical box. 8. Remove cover from furnace J--Box. 9. Route field ground wire through holes in electrical box and casing, and into furnace J--Box. 10. Reattach furnace J--Box to furnace casing with screws removed in Step 4. 11.
FIELD 24-VOLT WIRING FIELD 115-, 208/230-, 460-VOLT WIRING FACTORY 24-VOLT WIRING FACTORY 115-VOLT WIRING NOTE 2 W FIVE WIRE C Y R G 1-STAGE THERMOSTAT TERMINALS FIELD-SUPPLIED FUSED DISCONNECT THREE-WIRE HEATINGONLY BLK WHT BLK W2 WHT COM 208/230- OR 460-VOLT THREE PHASE W/W1 GND 115-VOLT FIELD- JUNCTION SUPPLIED BOX FUSED CONTROL DISCONNECT BOX NOTE 1 Y/Y2 R GND 208/230VOLT SINGLE PHASE CONDENSING UNIT G 24-VOLT TERMINAL BLOCK FURNACE NOTES: 1.
Fig. 27 -- Variable Furnace with Single--Speed Air Conditioner Fig. 28 -- Variable Furnace with Two--Speed Air Conditioner NOTES FOR FIGURES 27 -- 30 L09F025 L09F026 Fig. 29 -- Variable Furnace with Single--Speed Heat Pump (Dual Fuel) L09F026 L09F028 Fig. 30 -- Variable Furnace with Two--Speed Heat Pump (Dual Fuel) 1. 2. 3. 4. 5. Refer to outdoor equipment Installation Instructions for additional information and setup procedure.
CHIMNEY INSPECTION CHART For additional requirements refer to the National Fuel Gas Code NFPA 54/ANSI Z223.1 and ANSI/NFPA 211 Chimneys, Fireplaces, Vents, and Solid Fuel Burning Appliances Crown condition: Missing mortar or brick? Rebuild crown. Yes No Is chimney property lined with clay tile liner? No Yes Is liner and top seal in good condition? No Repair liner or top seal or reline chimney as necessary.
VENTING The furnace shall be connected to a listed factory built chimney or vent, or a clay--tile lined masonry or concrete chimney. Venting into an unlined masonry chimney or concrete chimney is prohibited. When an existing Category I furnace is removed or replaced, the original venting system, may no longer be sized to properly vent the attached appliances.
Fireplaces, Vents, and Solid Fuel Burning Appliances ANSI/NFPA 211 in the United States and must be in good condition. U.S.A.--Refer to Sections 13.1.8 and 13.2.20 of the NFPA 54/ANSI Z223.1 or the authority having jurisdiction to determine whether relining is required. If relining is required, use a properly sized listed metal liner, Type--B vent, or a listed alternative venting design. NOTE: See the NFPA 54/ANSI Z223.1 13.1.9 and 13.2.
Table 9 – Minimum Allowable Input Rating of Space--Heating Appliance in Thousands of Btuh per Hour INTERNAL AREA OF CHIMNEY VENT HEIGHT FT. (M) SQ. IN. (SQ.
SEE NOTES: 1,2,4,7,8,9 on the page following these figures SEE NOTES:1,2,3,4,5,7,8,9 on the page following these figures A03208 Fig. 32 -- Upflow Application -- Vent Elbow Up A03210 Fig. 34 -- Downflow Application -- Vent Elbow Up then Left SEE NOTES: 1,2,4,5,7,8,9 on the page following these figures SEE NOTES: 1,2,3,4,7,8,9 on the pages following these figures A03209 Fig. 33 -- Upflow Application -- Vent Elbow Right 32 A03211 Fig.
SEE NOTES: 1,2,4,7,8,9 on the page following these figures A03213 Fig. 38 -- Horizontal Left Application -- Vent Elbow Left SEE NOTES: 1,2,4,5,6,7,8,9,10 on the page following these figures A03207 Fig. 36 -- Downflow Application -- Vent Elbow Left then Up SEE NOTES: 1,2,4,5,7,8,9 on the page following these figures A03214 Fig. 39 -- Horizontal Left Application -- Vent Elbow Right then Up SEE NOTES:1,2,3,4,5,7,8,9 on the page following these figures.
SEE NOTES: 1,2,4,5,7,8,9 on the page following these figures SEE NOTES: 1,2,4,5,7,8,9 on the page following these figures A03215 Fig. 41 -- Horizontal Left Application -- Vent Elbow Up A03219 Fig. 43 -- Horizontal Right Application -- Vent Elbow Left then Up SEE NOTES: 1,2,4,5,7,8,9 SEE NOTES: 1,2,4,5,7,8,9 on the page following these figures A03216 Fig. 42 -- Horizontal Left Application -- Vent Elbow Right A02068 Fig. 44 -- Horizontal Right Application--Vent Elbow Left VENTING NOTES FOR FIG.
Caution!! For the following applications, use the minimum vertical heights as specified below. For all other applications, follow exclusively the National Fuel Gas Code. FURNACE ORIENTATION Downflow Horizontal Left Horizontal Left Downflow Downflow VENT ORIENTATION Vent elbow left, then up Fig. 32 Vent elbow right, then up Fig. 35 Vent Elbow up Fig. 36 Vent elbow up then left Fig. 30 Vent elbow up, then right Fig. 33 FURNACE INPUT (BTUH/HR) MIN. VENT DIAMETER IN. (mm)* MIN. VERTICAL VENT HEIGHT FT.
Start--Up Procedures ! WARNING FIRE OR EXPLOSION HAZARD Failure to follow this warning could result in personal injury, death, and/or property damage. Never purge a gas line into a combustion chamber. 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. A fire or explosion may result causing property damage, personal injury or loss of life. BURNER ORIFICE ! A93059 Fig.
Table 10 – Furnace Setup Switch Description A190151 A190149 Fig. 48 -- Service Label 441 01 3500 00 Specifications are subject to change without notice.
Adjustments Table 11 – Altitude Derate Multiplier for U.S.A. ! WARNING FIRE HAZARD Failure to follow this warning could result in personal injury, death and/or property damage. DO NOT bottom out gas valve regulator adjusting screw. This can result in unregulated manifold pressure and result in excess overfire and heat exchanger failures. ! CAUTION FURNACE DAMAGE HAZARD Failure to follow this caution may result in reduced furnace life. DO NOT redrill orifices.
j. Move setup switch SW1--2 to off position after completing low--heat adjustment. k. Leave manometer or similar device connected and proceed to Step 4. 4. Adjust manifold pressure to obtain high fire input rate. (See Fig. 45.) a. Jumper R to W/W1 and W2 thermostat connections on furnace control. This keeps furnace locked in high-heat operation. b. Remove regulator adjustment cap from high--heat gas valve pressure regulator (See Fig. 45) and turn high heat adjusting screw (3/16--in.
! WARNING FIRE HAZARD Failure to follow this warning could result in personal injury, death, and/or property damage. Reinstall manifold pressure tap plug in gas valve to prevent gas leak. j. Remove thermostat jumper wire from furnace control board. k. Turn gas valve ON/OFF switch to ON. ! CAUTION FURNACE OVERHEATING HAZARD Failure to follow this caution may result in reduced furnace life. Recheck temperature rise. It must be within limits specified on the rating plate.
A190152 Fig. 49 -- Wiring Diagram 441 01 3500 00 Specifications are subject to change without notice.
Table 13 – Gas Rate (CU ft./hr) SECONDS G FOR 1 REVOLUTION 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 42 SIZE OF TEST DIAL 1 Cu Ft. 2 Cu Ft. 5 Cu Ft.
Table 14 – Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate (Tabulated Data Based on 22,000 Btuh High--Heat/14,500 Btuh for Low--Heat per Burner, Derated 4 Percent for Each 1000 Ft. (305 M) Above Sea Level) ALTITUDE RANGE FT. (M) USA 0 to 2000 (0 to 610) ALTITUDE RANGE FT. (M) USA 2001 to 3000 (610 to 914) ALTITUDE RANGE FT. (M) USA 3001 to 4000 (914 to 1219) ALTITUDE RANGE FT. (M) USA 4001 to 5000 (1219 to 1524) AVG. GAS HEAT VALUE (BTUH/CU FT.
Table 14 -- Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate (Con’t.) (Tabulated Data Based on 22,000 Btuh High--Heat/14,500 Btuh for Low--Heat per Burner, Derated 4 Percent for Each 1000 Ft. Above Sea Level) ALTITUDE RANGE FT. (M) USA 5001 to 6000 (1524 to 1829) ALTITUDE RANGE FT. (M) USA 6001 to 7000 (1829 to 2134) ALTITUDE RANGE FT. (M) USA 7001 to 8000 (2134 to 2438) ALTITUDE RANGE FT. (M) USA 8001 to 9000 (2438 to 2743) USA 9001 to 10,000 2743 to 3048) 0.58 AVG.
Table 15 – Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate (Tabulated Data Based on 21,000 Btuh High--Heat/14,500 Btuh for Low--Heat Per Burner, Derated 4 Percent for Each 1000 Ft. (305 M) Above Sea level) ALTITUDE RANGE FT. (M) USA 0 to 2000 (0 to 610) ALTITUDE RANGE FT. (M) USA 2001 to 3000 (610 to 914) ALTITUDE RANGE FT. (M) USA 3001 to 4000 (914 to 1219) ALTITUDE RANGE FT. (M) USA 4001 to 5000 (1219 to 1524) Orifice No.
Table 15 -- Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate (Con’t.) (Tabulated Data Based on 21,000 Btuh High--Heat/14,500 Btuh for Low--Heat Per Burner, Derated 4 Percent for Each 1000 Ft. (305 M) Above Sea level) ALTITUDE RANGE FT. (M) USA 5001 to 6000 (1524 to 1829) ALTITUDE RANGE FT. (M) USA 6001 to 7000 (1829 to 2134) ALTITUDE RANGE FT. (M) USA 7001 to 8000 (2134 to 2438) ALTITUDE RANGE FT. (M) USA 8001 to 9000 (2438 to 2743) USA 9001 to 10,000 (2743 to 3048) AVG.
Check Safety Controls The flame sensor, gas valve, and pressure switch were all checked in the Start--up procedure section as part of normal operation. 1. Check Main Limit Switch This control shuts off combustion system and energizes air--circulating blower motor, if furnace overheats. By using this method to check limit control, it can be established that limit is functioning properly and will operate if there is a restricted return--air supply or motor failure.
General These instructions are written as if the furnace is installed in an upflow application. An upflow furnace application is where the blower is located below the combustion and controls section of the furnace, and conditioned air is discharged upward. Since this furnace can be installed in any of the 4 positions shown in Fig. 4, you must revise your orientation to component location accordingly.
7. RELEASE BLOWER ACCESS DOOR SWITCH, reattach wire to “R” terminal on furnace control board, replace blower access door, and replace outer access door. CARE AND MAINTENANCE ! WARNING FIRE OR EXPLOSION HAZARD Failure to follow this warning could result in personal injury, death and/or property damage. Never store anything on, near, or in contact with the furnace, such as: 1. Spray or aerosol cans, rags, brooms, dust mops, vacuum cleaners, or other cleaning tools. 2.
Table 16 – Filter Size Information -- In. (mm) FILTER SIZE FURNACE CASING WIDTH 14 ---1/2 (368) 17 ---1/2 (445) 21 (533) 24 (610) * Recommended SIDE RETURN 16 X 25 X 3/4 (406 X 635 X 19) 16 X 25 X 3/4 (406 X 635 X 19) 16 X 25 X 3/4 (406 X 635 X 19) 16 X 25 X 3/4 (406 X 635 X 19) The inducer and blower motors are pre--lubricated and require no additional lubrication. These motors can be identified by the absence of oil ports on each end of the motor. Clean blower motor and wheel as follows: 1.
A05025 Fig. 50 -- Igniter Position -- Side View 1-7/8 (47.6 mm) A05026 Fig. 51 -- Igniter Position -- Top View If it becomes necessary to clean the heat exchangers because of dust or corrosion, proceed as follows: 1. Turn OFF gas and electrical power to furnace. 2. Remove outer access door. 3. Disconnect vent connector from furnace vent elbow. 4. For downflow or horizontal furnace having an internal vent pipe, remove internal vent pipe within the casing. 5. Disconnect wires to the following components.
13. Reconnect wires to the following components (Use connection diagram on wiring label, if wires were not marked for reconnection locations.): a. Draft safeguard switch. b. Inducer motor. c. Pressure switches. d. Limit overtemperature switch. e. Gas valve. f. Hot surface igniter. g. Flame--sensing electrode. h. Flame rollout switches. 14. Reinstall internal vent pipe, if applicable. 15. Reinstall vent connector on furnace vent elbow.
AIR CONDITIONING TONS (12,000 BTU/HR) 1-1/2 2 2-1/2 3 3-1/2 4 5 6 AIRFLOW (CFM) 525 700 875 1050 1225 1400 1750 2100 070 MODEL X2 X X X1 X - 090 MODEL X X2 X X X1 X - 110 & 135 MODELS X X2 X X X X1 X X-- Indicated an allowable selection.
d. Flame--Proving -- When the burner flame is proved at the flame--proving sensor electrode FSE, the inducer motor IDM switches to low--speed unless the furnace is operating in high--heat, and the furnace control CPU begins the blower--ON delay period and continues to hold the gas valve GV--M open.
should be connected to the furnace control thermostat terminal DHUM. When there is a dehumidify demand, the DHUM input is activated, which means 24 vac signal is removed from the DHUM input terminal. In other words, the DHUM input logic is reversed. The DHUM input is turned ON when no dehumidify demand exists. Once 24 vac is detected by the furnace control on the DHUM input, the furnace control operates in Thermidistat mode.
b. After waiting 10 seconds the furnace control CPU turns the hot surface igniter ON for 15 seconds, then OFF. c. The furnace control CPU then turns the blower motor BLWM on at mid--range airflow for 15 seconds, then OFF. d. After shutting the blower motor OFF the furnace control CPU switches the inducer to low--heat speed for 10 seconds, then OFF. NOTE: The EAC terminals are energized when the blower is operating. After the component test is completed, 1 or more status codes (heartbeat, 2+5) will flash.
A190160 441 01 3500 00 Specifications are subject to change without notice.
A190159 Fig. 54 -- Troubleshooting Guide 58 Specifications are subject to change without notice.
PARTS REPLACEMENT INFORMATION GUIDE GAS CONTROL GROUP Manifold Burner assembly Orifice Flame sensor Hot surface igniter Gas valve Manual reset limit switches Burner support assembly CASING GROUP Outer door Blower door Top filler plate Bottom filler plate Bottom enclosure ELECTRICAL GROUP Control bracket Junction box Limit switch(es) Circuit board Door switch Transformer Wiring harness 115v Wiring harness 24v HEAT EXCHANGER GROUP Heat exchanger cell Cell panel Lox NOx baffle (California models only) INDUCE
Copyright 2019 International Comfort Products Lewisburg, TN 37091 USA 60 Specifications are subject to change without notice.
