Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS Two- -Stage, Non- -Communicating, Variable Speed, 35” Tall High Efficiency Condensing Gas Furnace F96VTN and G96VTN (Series A) NOTE: Read the entire instruction manual before starting the installation. SECTIONS TABLES SAFETY CONSIDERATIONS ......
Page 2 Required Notice for Massachusetts Installations IMPORTANT The Commonwealth of Massachusetts requires compliance with regulation 248 CMR as follows: 5.08: Modifications to NFPA- -54, Chapter 10 2) Revise 10.8.3 by adding the following additional requirements: a. For all side wall horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied:...
Page 3 A180203 BOTTOM INLET SHIP WT. FURNACE SIZE CABINET WIDTH OUTLET WIDTH WIDTH AIR INTAKE LB (KG) 0401410A 14--- 3/16 (361) 12--- 1/2 (319) 12--- 9/16 (322) 7--- 1/8 (181) 123 (55.8) 0401712A 17--- 1/2 (445) 15--- 7/8 (403) 16 (406) 8--- 3/4 (222) 133 (60.3) 0601412A...
Page 4: Safety Considerations
SAFETY CONSIDERATIONS as cleaning and replacing air filters. All other operations must be performed by trained service personnel. When working on heating WARNING equipment, observe precautions in literature, on tags, and on labels attached to or shipped with furnace and other safety precautions that may apply.
Page 5: Minimum Clearances To Combustible Materials
10. These Multipoise Gas- -Fired Furnaces are CSA design- -cer- This 4- -way multipoise Category IV condensing furnace is CSA tified for use with natural and propane gases (see furnace design- -certified as a direct- -vent (2-pipe) or non-direct vent rating plate) and for installation in alcoves, attics, base- (1-pipe) furnace.
Page 6: Codes And Standards
Table 2 – Loose Parts Bag DESCRIPTION QUANTITY Outlet Restrictor Plate (provided with 40K BTUH furnaces only; see Note) Air Intake Pipe Flange Vent Pipe Flange Pipe Flange Gaskets Sharp Tip Screws (Vent and Inlet Flanges) Vent Pipe Coupling Vent Pipe Coupling Clamps Pressure Switch Tube Rubber Drain Elbow Drain Tube Clamps...
Page 7: Electrostatic Discharge (Esd) Precautions
ELECTROSTATIC DISCHARGE (ESD) S Laundry rooms S Hobby or craft rooms PRECAUTIONS PROCEDURE S Chemical storage areas CAUTION If air is exposed to the following substances, it should not be used for combustion air, and outdoor air may be required for combustion: FURNACE RELIABILITY HAZARD S Permanent wave solutions...
Page 8: Air For Combustion And Ventilation
S Spaces having at least 50 cubic feet per 1,000 Btuh (4.8 cubic WARNING meters per kW) may use the Indoor Combustion Air, Standard or Known Air Infiltration Method. CARBON MONOXIDE POISONING / COMPONENT DAMAGE HAZARD CAUTION Failure to follow this warning could result in personal injury or death and unit component damage.
Page 9: Condensate Trap
having free area of at least 1- -in. /4,000 Btuh of total input WARNING rating for all gas appliances in the space. 3. In spaces that use the Indoor Combustion Air Method, in- filtration should be adequate to provide air for combustion, CARBON MONOXIDE POISONING HAZARD permanent ventilation and dilution of flue gases.
Page 10: Minimum Free Area Required
Table 3 – Minimum Free Area Required for Each Combustion Air Opening or Duct to Outdoors TWO OPENINGS OR TWO HORIZONTAL DUCTS SINGLE DUCT OR OPENING VERTICAL DUCTS (1 SQ. IN./2,000 BTUH) (1 SQ. IN./3,000 BTUH) FURNACE (1 SQ. IN./4,000 BTUH) (1,100 SQ.
Page 11 A11307 Fig. 8 - - Upflow Trap Configuration (Appearance may vary) A11573 Fig. 10 - - Horizontal Right Trap Configuration (Appearance may vary) A11587 Fig. 9 - - Downflow Trap Configuration (Appearance may vary) NOTICE The field- -supplied, accessory horizontal drain trap grommet is ONLY REQUIRED FOR DIRECT VENT APPLICATIONS.
Page 12 To Relocate the Condensate Trap: S Fig. 10 shows the condensate trap and tubing before and after S Remove the knockout in the casing for the condensate trap. relocation in the horizontal right position. S Install the grommet in the casing when required for direct- -vent S Fig.
Page 13: Condensate Drain
A14532 Fig. 13 - - Example of Field Drain Attachment (Not Allowed) CONDENSATE DRAIN CONNECTION DO NOT trap the drain line in any other location than at the condensate drain trap supplied with the furnace. If possible, DO CAUTION NOT route the drain line where it may freeze. The drain line must terminate at an inside drain to prevent freezing of the condensate and possible property damage.
Page 14 Upflow/Downflow Orientation In the Upflow or Downflow orientation, the condensate trap is inside the furnace casing. The condensate drain must be routed from the trap through the furnace casing. The condensate drain can be routed through the left or right side of the casing. (The left or right side is as you are viewing/facing the furnace from the front.) An indoor coil condensate drain or humidifier drain can be connected to the external furnace condensate drain provided:...
Page 15 17. Connect additional condensate piping to a code-approved ATTACH ELBOW TO FORMED END CONDENSATE TRAP drain, or to a condensate pump approved for use with acidic OF GROMMET CUT FORMED END OFF furnace condensate and compatible with mineral and CONDENSATE DRAIN ELBOW vegetable oils, such as canola oil.
Page 16 INSTALLATION Return Air Connections NOTICE WARNING FIRE HAZARD This furnace is certified to leak 2% or less of nominal air conditioning CFM delivered when pressurized to 1- -in. water A failure to follow this warning could cause personal injury, column with all present air inlets, including bottom closure in death and/or property damage.
Page 17 Bottom Return Air Inlet supply- -air duct flange, use wide duct pliers or hand seamers to These furnaces are shipped with bottom closure panel installed in bend flange back and forth until it breaks off. Be careful of sharp bottom return- -air opening. Remove and discard this panel when edges.
Page 18 Table 5 – Opening Dimensions - - In. (mm) FURNACE PLENUM OPENING FLOOR OPENING CASING APPLICATION WIDTH IN. (mm) Upflow Applications on Combustible or Noncombustible 12--- 11/16 21--- 5/8 13--- 5/16 22--- 1/4 Flooring (subbase not required) (322) (549) (338) (565) Downflow Applications on Noncombustible Flooring 12--- 9/16...
Page 19 NOTE: Bottom closure must be used when leveling legs are used. Not all horizontal furnaces are approved for side return air It may be necessary to remove and reinstall bottom closure panel to connections See Fig. 23. Where required by code, seal bottom install leveling legs.
Page 20 Table 7 – Filter Media Pressure Drop (Clean) Versus Airflow - - In. W.C. (Pa) Representative After-Market Filter Media* 14 x 25 Filter Factory-Accessory Factory-Accessory (356 x 635 mm) Washable Media* Fiberglass* Pleated* (1-in. / 2.5 cm) (4-in. / 10 cm) (1-in.
Page 21 COMBUSTION - AIR PIPE (SEE VENTING SECTION) 30 IN. (762 mm) MIN. WORK AREA 2-IN. (51 mm) ROLLOUT PROTECTION REQUIRED Install 12” x 22” (305x559 mm) sheet metal in front of burner compartment area. The sheet metal MUST extend underneath the furnace casing by 1-in. (25 mm) with the door removed.
Page 22 Table 9 – Cooling and Heating Air Delivery - - CFM (Bottom Return with Filter) (SW1---5 and SW2---2 set to OFF, except as indicated. See Notes 1 and 2.) Unit Size: Clg/CF Switch settings External Static Pressure (ESP) 0401410A Clg Switches: SW2--- 8 SW2--- 7 SW2--- 6...
Page 23 Table 9 - - Cooling and Heating Air Delivery - - CFM (Bottom Return with Filter) continued (SW1---5 and SW2---2 set to OFF, except as indicated. See Notes 1 and 2.) Unit Size: Clg/CF Switch settings External Static Pressure (ESP) 0601412A Clg Switches: SW2--- 8...
Page 24 Table 9 - - Cooling and Heating Air Delivery - - CFM (Bottom Return with Filter) continued (SW1---5 and SW2---2 set to OFF, except as indicated. See Notes 1 and 2.) Unit Size: Clg/CF Switch settings External Static Pressure (ESP) 0801716A Clg Switches: SW2--- 8...
Page 25 Table 9 - - Cooling and Heating Air Delivery - - CFM (Bottom Return with Filter) continued (SW1---5 and SW2---2 set to OFF, except as indicated. See Notes 1 and 2.) Unit Size: Clg/CF Switch settings External Static Pressure (ESP) 1002120A Clg Switches: SW2--- 8...
Page 26: Air Ducts
Unit Size: Clg/CF Switch settings External Static Pressure (ESP) 1202422A Clg Switches: SW2--- 8 SW2--- 7 SW2--- 6 Clg Default: 2060 2015 1975 1930 1885 1840 1790 1750 1705 1630 See Note 4 1080 1005 1285 1220 1150 1085 1020 1465 1410 1350...
Page 27: Gas Piping
from the furnace. See NFPA 90B or local code for further requirements. Return Duct Sizing Refer to the Filter Selection and Duct Sizing section for information on the proper selection of filter sizes and the associated ductwork and duct transitions. Improperly designed filtering systems and return ductwork are the most common causes of airflow and/or noise complaints in HVAC systems.
Page 28: Electrical Connections
For direct vent (2- -pipe) applications, seal the gas pipe knockout to After all connections have been made, purge lines and check for prevent air leakage. leakage at furnace prior to operating furnace. Remove the required knockout. Install the grommet in the NOTE: The furnace gas control valve inlet pressure tap knockout.
Page 29: Electrical Data
A11401 Fig. 32 - - Typical Two- -Stage Field Wiring Diagram Table 11 – Electrical Data MAXIMUM OPERATING VOLTAGE VOLTS--- MAXIMUM MINIMUM MAXIMUM FUSE OR RANGE* HERTZ--- UNIT UNIT WIRE SIZE WIRE LENGTH CKT BKR AMPACITY# FURNACE SIZE PHASE Maximum* Minimum* AMPS FT (M)}...
Page 30 A190279 Fig. 33 - - Field- -Supplied External Electrical Box on Furnace Casing 115- -V Wiring Furnace must have a 115-v power supply properly connected and grounded. NOTE: Proper polarity must be maintained for 115-v wiring. If polarity is incorrect, control LED status indicator light will flash rapidly (Status Code 10) and furnace will NOT operate.
Page 31 External Electrical Box on Furnace Casing 2. Route listed power cord through 7/8- -in. (22 mm) diameter hole in casing and J- -Box bracket. NOTE: Check to ensure that external electrical box does not 3. Secure power cord to J- -Box bracket with a strain relief interfere with duct work, gas piping or the indoor coil drain.
Page 32 Thermostats furnace control board. For two stage thermostat control of a 2-stage outdoor unit, remove the ACRDJ jumper from the furnace control A single stage heating and cooling thermostat can be used with the board. Refer to typical thermostat wiring diagrams and the furnace.
Page 33 Accessories (See Fig. 37 and 38.) Variable Speed Furnace with Two- -Stage Air 1. Electronic Air Cleaner (EAC) Conditioner Connect an accessory Electronic Air Cleaner (if used) using 1/4- -in. female quick connect terminals to the two male 1/4- -in. quick- -connect terminals on the control board NOTE 9 marked EAC- -1 and EAC- -2.
Page 34 Variable Speed Furnace with Two- -Stage Heat AC with Variable Speed Furnace, Humidifier, Pump (Dual Fuel) and Dehumidification NOTE 9 L09F029 HP with Variable Speed Furnace, Humidifier, and Dehumidification L09F028 Variable Speed Furnace and Humidifier Only L09F030 L09F029 Fig. 39 - - Thermostat Wiring Diagrams NOTES FOR THERMOSTAT WIRING DIAGRAMS 1.
Page 35 VENTING évacuation des gaz de combustion, coté classe IIA, 65 deg C. doivent être utilisés avec le système d’évacuation IPEX 636 – Ne NOTE: Planning for the venting system should be done in pas combiner l ’apprêt et le ciment d’un manufacturier avec un conjunction with planning for the ductwork, drainage, and furnace système d’évacuation d’un manufacturier différent.
Page 36 WARNING WARNING CARBON MONOXIDE POISONING HAZARD CARBON MONOXIDE POISONING HAZARD Failure to follow the instructions outlined below for each Failure to follow the steps outlined below for each appliance appliance being placed into operation could result in carbon connected to the venting system being placed into operation monoxide poisoning or death.
Page 37 Roof termination is the recommended termination location. Roof WARNING terminations provide better performance against sustained prevailing winds. The roof location is preferred since the vent and combustion air system is less susceptible to damage or CARBON MONOXIDE POISONING HAZARD contamination. The termination is usually located away from Failure to follow the instructions outlined below for each adjacent structures or other...
Page 38: Vent Termination Kit For Direct Vent (2- -Pipe) Systems
A13305 Fig. 40 - - Combustion Air and Vent Pipe Termination for Direct Vent (2- -Pipe) System A05091 Fig. 41 - - Vent Pipe Termination for Non- -Direct Vent and Ventilated Combustion Air System Table 12 – Vent Termination Kit for Direct Vent (2- -pipe) Systems Approved Two---Pipe Termination Fittings Vent and Allowable...
Page 39 A12326 Fig. 42 - - Direct Vent Termination Clearance NOTE: The following is based upon National codes for gas appliances and is provided as a reference. Refer to local codes which may supersede these standards and/or recommendations. (1 ) (2 ) Canadian Installations U.S.
Page 40 A12325 Fig. 43 - - Ventilated Combustion Air and Non- -Direct Vent Termination Clearance NOTE: The following is based upon National codes for gas appliances and is provided as a reference. Refer to local codes which may supersede these standards and/or recommendations. (1 ) (2 ) Canadian Installations...
Page 41 A190032 Fig. 44 - - Inside Corner Termination Inside Corner Terminations Inside corner vent terminations are permitted provided that: S Only two exterior walls come together to form an angle of 90 degrees to 135 degrees. There are no other exterior walls attached to either wall to form an alcove.
Page 42 NOTICE RECOMMENDED SUPPORT FOR VENT TERMINATIONS It is recommended that sidewall vent terminations in excess of 24 inches (.6 M) or rooftop terminations in excess of 36 inches (1 M) in vertical length be supported by EITHER the Direct Vent Termination Kit shown in Table 12 or by field- -supplied brackets or supports fastened to the structure.
Page 43 Size the Vent and Combustion Air Pipes General NOTICE OPTIONAL CONFIGURATION FOR COMBUSTION AIR INLET PIPE In applications where there is a risk of excessive moisture entering the combustion air inlet pipe, a moisture trap may be added to the inlet pipe to help prevent moisture from entering the furnace from the combustion air inlet pipe.
Page 44: Deductions From Maximum Equivalent Vent Length
NOTE: Maximum Equivalent Vent Length (MEVL) includes standard and concentric vent termination and does NOT include elbows. Use Table 14 - Deductions from Maximum Equivalent Vent Length to determine allowable vent length for each application. Table 13 – Maximum Equivalent Vent Length - - Ft. Unit Size 40,000 60,000...
Page 45: Maximum Equivalent Vent Length
A10497 Fig. 50 - - Vent Terminations for Ventilated Combustion Air Recommended Combustion Air Inlet Moisture Trap if the inlet air trap drain and the evaporator coil drain empty into an open segment of pipe above the drain. See Fig.12. When using Recommended to prevent moisture from trickling into the furnace the External Vent Trap Kit, refer to those instructions for proper vestibule, a trap can be installed in the intake air pipe near the...
Page 46 TO CODE- - APPROVED DRAIN OR CONDENSATE PUMP Recommend “T” fitting with 4--inch minimum height standpipe (A) of same diameter or larger extending upward. Dry Well Dry Well (water tight Dry Well and removable) (water tight (water tight and removable) and removable) Representative drawing only, some models may vary in appearance.
Page 47 9. If the Total Vent Length is longer than the Maximum Configure the Furnace Equivalent Vent Length for the diameter of pipe chosen, WARNING that diameter pipe MAY NOT be used for venting the fur- nace. Try the next larger diameter pipe NOTE: If the calculated Total Equivalent Vent Lengths results in CARBON MONOXIDE POISONING HAZARD different diameter pipes for the vent and combustion air, select the...
Page 48 Table 15 – Maximum Allowable Exposed Vent Lengths in Unconditioned Space Insulation Table - - Ft. / M Unit Size 40,000* BTUH 60,000 BTUH Uninsulated 3/8-in. Insulation 1/2-in. Insulation Uninsulated 3/8-in. Insulation 1/2-in. Insulation Pipe Dia. 1 ½ 2 ½ 1 ½...
Page 49 Rotate vent elbow to required position. Any other unused knockout may be used for combustion air connection. Rotate vent elbow to required position. & UPFLOW LEFT CONFIGURATION DOWNFLOW LEFT CONFIGURATION A11309A A11311A Rotate vent elbow to required position. Any other unused Any other unused knockout may be used knockout may be used...
Page 50 ALTERNATE COMBUSTION AIR CONNECTIONS A11337 HORIZONTAL LEFT ---VERTICAL VENT CONFIGURATION A11327A Alternate combustion air connection. Rotate vent elbow to required position. Vent Pipe Requires Internal Vent Kit See Product Data for Current Kit Number HORIZONTAL RIGHT LEFT VENT CONFIGURATION A11336 A11328A ALTERNATE COMBUSTION...
Page 51 A14546 Fig. 56 - - Near Furnace Vent Connections A170006 Fig. 57 - - Inducer Vent Elbow Installing the Vent Pipe Adapter and Combustion Air WARNING Pipe Adapter WARNING CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in personal injury CARBON MONOXIDE POISONING HAZARD or death.
Page 52 A13074 Fig. 58 - - Vent Coupling and Adapter with Gaskets in a light, uniform coat on inside of socket to prevent NOTICE buildup of excess cement. Apply second coat. DO NOT CEMENT POLYPROPYLENE FITTINGS. 14. While cement is still wet, twist pipe into socket with 1/4- -in. The following instructions are for PVC/ABS DWV vent turn.
Page 53 Optional Installation of the Vent Pipe 13. Pilot drill a 1/8- -in. hole in the combustion air pipe adapter. 14. Complete the vent and combustion air pipe as shown in NOTE: THIS TECHNIQUE “Install the Vent and Combustion Air Pipe.” POLYPROPYLENE VENTING SYSTEMS.
Page 54 Sidewall Terminations 2. Loosely install elbow in bracket (if used) and place assem- bly on combustion- -air pipe. Concentric Vent 3. Install bracket as shown in Fig. 40 and 49. NOTE: Follow the instructions of the vent terminal manufacturer. NOTE: For applications using vent pipe option indicated by These instructions are provided as a reference only.
Page 55 Table 17 – Approved Combustion-Air and Vent Pipe, Fitting and Cement Materials (USA Installations) MATERIALS 1. All pipe, fittings, primers*, and solvents* must conform to American National Standards Institute (ANSI) standards and American Society for Testing and Materials (ASTM) standards or ULC S636 where required by code. 2.
Page 56: Start- -Up, Adjustment, And Safety Check
Example 2 A direct-vent 60,000 BTUH furnace installed at 2100 ft. (640M). Venting system includes FOR EACH PIPE: 100 feet (30 M) of vent pipe, 95 feet (29 M) of combustion air inlet pipe, (3) 90º long-radius elbows, and a polypropylene concentric vent kit. Also includes 20 feet (6.1 M) of flexible polypropylene vent pipe, included within the 100 feet (30 M) of vent pipe.
Page 57 NOTE: If a bypass humidifier is used, setup switch SW1-4 airflow for two- -speed cooling units. Refer to the Adjustments section for setup switch configurations. To set desired cooling (Comfort/Efficiency) should be in OFF=Efficiency position. This airflow: compensates for the increased temperature in return air resulting 1.
Page 58 1. Default A/C airflow when A/C setup switches are in OFF position. 2. Default Low ---Stage A/C airflow when CF switches are in OFF position A190148 Fig. 61 - - Airflow Selection (based on 350 CFM/TON) for A/C (SW2- -6, 7, 8) and *CF (SW2- -3, 4, 5) Prime Condensate Trap with Water 2.
Page 59 In Canada, the input rating must be reduced by 5 percent for WARNING altitudes of 2000 ft. (609.6M) to 4500 ft. (1371.6M) above sea level. The natural gas manifold pressures in Table 20 adjust for BOTH altitude and natural gas heating value. FIRE HAZARD NOTE: For Canadian altitudes of 2000 to 4500 ft.
Page 60 8. When main burners ignite, confirm inlet gas pressure is k. Leave manometer or similar device connected and proceed Between 4.5 in. w.c. and 13.6 in. w.c. to Step 2. 9. Remove jumper across thermostat connections to terminate 2. Adjust manifold pressure to obtain high fire input rate See call for heat.
Page 61: Blower Off Delay Setup Switch
To lock the furnace in low heat: 2. Restore furnace to normal operating condition. a. Turn gas valve ON/OFF switch to OFF. 1. Turn SW1- -2 ON at the furnace control. b. Remove water column manometer or similar device from 2.
Page 62 match the airflow required for low-speed cooling. Select the d. Record amp. draw across terminals when furnace is in low required airflow from Table 9 and Fig. 60. heat and after blower starts. e. Set heat anticipator on thermostat per thermostat NOTE: The airflow selected via SW2- -3, 4, 5 (Low-Speed instructions and install on subbase or wall.
Page 63: Orifice Size And Manifold Pressure
Table 20 – Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate TWO-STAGE FURNACE (TABULATED DATA BASED ON 20,000 BTUH HIGH-HEAT / 13,000 BTUH LOW-HEAT PER BURNER, DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL) ALTITUDE RANGE HEAT VALUE 0.58 0.60 0.62...
Page 64 Table 20 - - Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate (Continued) TWO-STAGE FURNACE (TABULATED DATA BASED ON 20,000 BTUH HIGH-HEAT / 13,000 BTUH LOW-HEAT PER BURNER, DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL) ALTITUDE RANGE HEAT VALUE 0.58 0.60...
Page 65 A190071 Fig. 67 - - Service Label Information Specifications subject to change without notice. 440 01 4801 00...
Page 66: Service And Maintenance Procedures
Table 21 – Gas Rate (CU ft./hr) CAUTION SIZE OF TEST DIAL SIZE OF TEST DIAL SEC. SEC. ENVIRONMENTAL HAZARD FOR 1 FOR 1 REV. REV. Failure to follow this caution may result in environmental 1800 pollution. 1636 Remove and recycle all components or materials (i.e. oil, 1500 refrigerant, control board, etc.) before unit final disposal.
Page 67 The electrical ground and polarity for 115- -v wiring must be WARNING properly maintained. Refer to Fig. 32 for field wiring information and to Fig. 75 for furnace wiring information. NOTE: If the polarity is not correct, the STATUS LED on the ELECTRICAL SHOCK HAZARD control will flashes rapidly (Status Code 10) and prevent the Failure to follow this warning could result in personal injury,...
Page 68 WARNING WARNING ELECTRICAL SHOCK, FIRE OR EXPLOSION CARBON MONOXIDE POISONING FIRE HAZARD HAZARD Failure to follow this warning could result in personal Failure to follow this warning could result in personal injury, injury or death, or property damage. death and/or property damage. Before installing, modifying, or servicing system, main Never operate furnace without a filter or filtration device electrical disconnect switch must be in the OFF position and...
Page 69 5. Remove screws securing blower assembly to blower shelf BLOWER WHEEL SET-SCREW GROMMET MOTOR SHALL BE TIGHTENED TO COLLAR and slide blower assembly out of furnace. Detach ground 160 IN.-LB. +/-20 IN. -LB. WASHER wire and disconnect blower motor harness plugs from blow- BLOWER WHEEL MOTOR SHAFT FLAT...
Page 70 17. Turn on electrical supply. Manually close blower door 6. Remove individual wires from terminals on gas valve. switch. Use a piece of tape to hold switch closed. Check for 7. Disconnect Hot Surface Ignitor (HSI) wires from HSI. proper rotation and speed changes between heating and 8.
Page 71 a. Using a 1/4- -in. driver, remove the two screws securing the WARNING ignitor mounting bracket to the burner assembly See Fig. 70 . b. Carefully withdraw the ignitor and bracket assembly FIRE OR EXPLOSION HAZARD through the front of the burner assembly without striking Failure to follow this warning could result in personal injury the ignitor on surrounding parts.
Page 72 6. Disconnect the condensate trap relief hose from collector WARNING box port and condensate trap. NOTE: If condensate has a heat pad attached to the trap, trace the ELECTRICAL SHOCK, FIRE OR EXPLOSION wires for the pad back to the connection point and disconnect the HAZARD wires for the heat pad.
Page 73 Therefore, once it has been operated, it cannot be turned off and left off for an extended period of time when temperatures will reach 32_F (0_C) or lower unless winterized. Follow these procedures to winterize your furnace: CAUTION UNIT COMPONENT DAMAGE HAZARD Failure to follow this caution may result in damage to the furnace and other property damage.
Page 74 A190196 Fig. 74 - - Troubleshooting Guide Specifications subject to change without notice. 440 01 4801 00...
Page 75 A190197 Troubleshooting Guide (Continued) Specifications subject to change without notice. 440 01 4801 00...
Page 76: Sequence Of Operation
SEQUENCE OF OPERATION and the low- -heat pressure switch LPS closes, the furnace will operate at low- -heat gas flow rate until NOTE: Furnace control must be grounded for proper operation or the high- -heat pressure switch closes for a maxi- else control will lock out.
Page 77 2. Two- -Stage Thermostat and Two- -Stage Heating When the thermostat is satisfied, the R- -to- -G- -and- -Y1 or R- -to- - See Fig. 38 and 39 for thermostat connections. G- -and- -Y1- -and- -Y2 circuits are opened. The outdoor unit stops, and the furnace blower BLWM and electronic air cleaner terminal NOTE: In this mode the low- -heat only switch SW1- -2 must be EAC- -1 will remain energized for an additional 90 seconds.
Page 78 matically changes the timing sequence to avoid long blower trol CPU will transition the blower motor BLWM airflow to off times during demand defrost cycles. Whenever W/W1 is cooling airflow. If Y/Y2 input signal disappears and the Y1 energized along with Y1 or Y/Y2, the furnace control CPU input is still energized the furnace control CPU will transi- will transition to or bring on the blower motor BLWM at tion the blower motor BLWM to low- -cooling airflow.
Page 79 PARTS REPLACEMENT INFORMATION GUIDE Casing Group Gas Control Group Blower door Burner Bottom plate Flame sensor Control door Gas valve Door knob assembly Hot surface ignitor Top filler plate Manifold Orifice Electrical Group Heat Exchanger Group 3- -Amp fuse Circuit board Containment plate Control box Coupling Box...
Page 80 Copyright 2019 International Comfort Products Lewisburg, TN 37091 USA Specifications subject to change without notice. 440 01 4801 00...

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