These instructions must be read and understood completely before attemptin 9 installation. Safety Labeling and Signal Words DANGER, WARNING, CAUTION, and NOTE The signal words DANGER, WARNING, CAUTION, and NOTE are used to identify levels of hazard seriousness. The signal word DANGER is only used on product labels to signify an immediate hazard. The signal words WARNING, CAUTION, and NOTE will be used on product labels and throughout this manual and other manual that may apply to the product.
Figure 1 - Dimensional Drawing O z b 1 18/16 r,.= I2 1-51/2,, _57_ I14t_1 NR FLOW "r_ I_ CAImNG 1 LOCATION ;::-, 2"t=V4 ['a_71 ] L1,7 [4&S] [12.7] THERMO_rATWIRE TI i _¢7/o I [22.=] ACCESSORY 1-- [540.5] BoI"rOMINLET 21.o 2_N rrzl.2] 29 [7_ I,- [1_71 8,1 618/18 [172.S] _86/8 it1=]-_1 /_ ST_ [I_.S] S_-5 7/10 [14&S1 [1N'lql 111/111 _ _ [4L21 I l TOP OF CAmNG " ' F¢I= ; / [_,.Tj //THERMO_'FAT / F¢1_/4 T 11_.=] oo/16 -[=4S.Sl f 41B/16 =7a/4 pt ,.7] _W16 ['_0.TJ " _.L_-% .
SAFETY CONSIDERATIONS FIRE, EXPLOSION, ELECTRICAL SHOCK, CARBON MONOXIDE POISONING HAZARD symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies a hazard which could result in personal injury or death. CAUTION is used to identify hazards which may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which wilt result in enhanced installation, reliability, or operation. 1.
Figure 2 - Clearances to Combustibles I INSTALLATION I MINIMUMINCHESCLEARANCETO COMBUSTIBLE CONSTRUCTION This forced air furnace is UPFLOW, DOWNFLOW, and equipped for use with natural I HORIZONTAL his furnace is installations. approved for gas at altitudes 0 - 10,000 ft Clearance arrows (0 - 3,050m). donotchangewith An accessory kit, supplied by the manufacturer, shall be used to convert to propane gas use or may be required for some natural gas applications.
General Installation Current edition of the NFGC and the NFPA 90B. For copies, contact the National Fire Protection Association Inc., Batterymarch Park, Quincy, MA 02269; (www.NFPA.org) or for only the NFGC, contact the American Gas Association, 400 N. Capitol Street, N.W., Washington, DO 20001 (www.AGA.org). Combustion and Ventilation Air Section 9.3 NFPA 54/ANSI Z223.1-2012, Air for Combustion and Ventilation. 1. Disconnect all power to the furnace. Multiple disconnects may be required.
This furnace must: • be installed so the electrical components are protected from water. • not be installed directly on any combustible material other than wood flooring for upflow applications. Downflow installations require use of a factory-approved floor base or coil model numbers END4X, ENW4X or coil casing model number NAEA when installed on combustible materials or wood flooring (refer to SAFETY CONSIDERATIONS). • be located close to the chimney or vent and attached to an air distribution system.
Figure 6 - Prohibit Installation on Back 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: -The furnace is permanently installed with all electrical wiring, piping, venting and ducting installed according to these installation instructions.
Table 3 - Minimum Space Volumes for 100% Combustion, Ventilation, and Dilution from Indoors OTHER THAN FAN-ASSISTED TOTAL (1,000'S BTUH GAS INPUT RATE) 30 40 FAN-ASSISTED TOTAL (1,000'S BTUH GAS INPUT RATE) 50 44 ACH 66 88 110 132 Space Volume Ft3 (M 3) 0.60 1,050 (29.7) 1,400 (39.6) 1,750 (49.5) 1,100 (31.1) 1,650 (46.7) 2,200 (62.2) 2,750 (77.8) 3,300 (93.4) 0.50 1,260 (35.6) 1,680 (47.5) 2,100 (59.4) 1,320 (37.3) 1,980 (56.0) 2,640 (74.7) 3,300 (93.4) 3,960 (112.1) 0.
3. c. TWO HORIZONTAL DUCTS require 1 sq. in. (645 sq. mm) of free area per 2,000 Btuh (1,100 mm2/kW) of combined input for all gas appliances in the space per Figure 7 and Table 2. d. TWO OPENINGS OR VERTICAL DUCTS require 1 sq. in. (645 sq. mm) of free area per 4,000 Btuh (550 mm2/kW) for combined input of all gas appliances in the space per Figure 7 and Table 2. ONE OUTDOOR OPENING requires: a. 1 sq. in. (645 sq.
c. Combining space on different floor levels. The volumes of spaces on different floor levels shall be considered as communicating spaces if connected by one or more permanent openings in doors or floors having free area of at least 2 in.2/1,000 Btuh (4,400 mm2/kW) of total input rating of all gas appliances. 2. 3. 4. In spaces that use the Indoor Combustion Air Method, infiltration should be adequate to provide air for combustion, permanent ventilation and dilution of flue gases.
5. Reinstall bottom closure panel if removed. DOWNFLOW INSTALLATION NOTE: For downflow applications, this furnace is approved for use on combustible flooring when any one of the following two accessories are used: • Downflow combustible floor subbase • Coil model numbers END4X or ENW4X • Coil casing model number NAEA 1. Determine application being installed from Table 4. 2. Construct hole in floor per Table 4 and Figure 11.
Figure 12 - Furnace, Plenum, and Subbase Installed on a Combustible Floor Figure 13 - Furnace, Plenum, and Coil or Coil Casing Installed on a Combustible Floor FURNACE FURNACE (OR COIL CASING WHEN USED) ,------ APPROVED COIL ASSEMBLY OR COIL BOX COMBUSTIBLE FLOORING j_ COMBUSTIBLE FLOORING _'X SUBBASE __ SHEET METAL PLENUM FLOOR __ OPENING SHEET METAL PLENUM FLOOR OPENING A96285 A08556 Table 4 - Opening FURNACE CASING WIDTH Dimensions - In.
Filter Arrangement Ductwork passing through unconditioned space should insulated to enhance system performance. When conditioning is used, a vapor barrier is recommended. CARBON MONOXIDE POISONING Maintain a 1-in. (25 mm) clearance from combustible materials to supply air ductwork for a distance of 36-in. (914 mm) horizontally from the furnace. See NFPA 90B or local code for further requirements.
Figure 15 - Horizontal Unit Suspension 4 REQ. l / 1/4" (6mm) THREADED ROD UTER DOOF ASSEMBLY c. SECURE ANGLE IRON TO BOTTOM OF FURNACE WiTH 3 #8 xS/4'' (19ram) SCREWS TYPICAL FOR 2 SUPPORTS 8" (203mm) MIN FOR DOOR REMOVAL 1" (25mm) SQUARE, 1-1/4"xl-1/4"xt/8" (32x32x3mm) ANGLE IRON OR UNI-STRUT MAY BE USED (2) HEX NUTS, (2) WASHERS REQ.
Figure 17 - Typical Attic Installation 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" (451 mm)OVERALL 4 3/4" (121mm) UNDER DOOR 1" (25mm) UNDER FURNACE ENTRY EXTEND OUT 12" (305mm) FROM FACE OF DOOR VENT _0-1N.
Figure 19 - Downflow Return Air Configurations DOWNFLOW RETURN AmR FLOW MODELS AIR CONFIGURATIONS RETURN AmR CONNECTION ONLY 1 and Restrictions AND RETURN AIR CONNECTION ONLY 2 RESTRICTIONS RETURN AiR CONNECTION ONLY 3 RETURN AIR COMBINATIONS OF 1, 2, AND 3 5 TONS AND GREATER * YES NO NO NO ALL OTHER YES NO NO NO MODELS Figure 20 - Horizontal Return Air Configurations and Restrictions RETURN AIR /\_x SIDE RETURNAIR \xJ NOT PERMI_ED FOR 066,060, -22-2O AIRFLOW MODELS ii .....
Return Air Connections Installations must be made in accordance with all authorities having jurisdiction. If possible, the gas supply line should be a separate line running directly from meter to furnace. NOTE: In the state of Massachusetts: FIRE HAZARD A failure to follow this warning could cause personal injury, death and/or property damage. Never connect return-air ducts to the back of the furnace. Follow instructions below.
NOTE: The furnace gas control valve inlet pressure tap connection is suitable to use as test gauge connection providing test pressure DOES NOT exceed maximum 0.5 psig (14-1n. W.C.) stated on gas control valve. (See Figure 49) Some installations require gas entry on right side of furnace (as viewed in upflow). (See Figure 21) Install a sediment trap in riser leading to furnace as shown in Figure 22. Connect a capped nipple into lower end of tee.
Table 6 - Electrical Data FURNACE SIZE VOLTSHERTZPHASE OPERATING VOLTAGE RANGE Max. Min. MAX. UNIT AMPS UNIT AMPAClTY # MIN. WIRE SIZE AWG LENGTH - FT"(M)_: MAX. WIRE MAX. FUSE OR CKT BKR AMPS 1" 0451412B 115-60-1 127 104 8.0 10.8 14 34 (10.4) 15 0701716B 115-60-1 127 104 9.6 12.8 14 28 (8.5) 15 0902116B 115-60-1 127 104 10.2 13.4 14 27 (8.2) 15 1102122B 115-60-1 127 104 13.0 16.8 12 34 (10.4) 2O 1352422B 115-60-1 127 104 13.0 16.8 12 34 (10.
Figure 24 - Field-Supplied Electrical Box on Furnace Casing 3. Secure BX cable to J-Box bracket with connectors approved for the type of cable used. 4. Secure field ground wire to green ground screw on J-Box bracket. 5. Connect line voltage leads as shown in Figure 25. 6. o Reinstall cover to J-Box. er and bracket. Do not pinch wires between cov- 24-V Wiring Make field 24-v connections at the 24-v terminal strip.
Figure 25 - Example of Field Wiring Diagram .... .... -- FIELD 24-VOLT WIRING FIELD 115-, 208/230-, 460-VOLT WIRING FACTORY 24-VOLT WIRING FACTORY 115-VOLT WIRING NOTE 2 r FIVE -.... "_.
13 in the United States, the local building codes, and furnace and vent manufacturers' instructions. CARBON MONOXIDE POISONING The following information and warning must be considered in addition to the requirements defined in the NFGC. 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.
Figure 28 - Variable Speed Furnace with Two-Stage Conditioner ICP THERMOSTAT VARIABLE SPEED FURNACE NOTE 5 Air TWO-STAGE AIR CONDITIONER Figure 30 - Variable Speed Furnace with Two-Stage Pump (Dual Fuel) ICP THERMOSTAT VARIABLE SPEED FURNACE Heat TWO-,STAGE HEAT PUMP -I--"_ F_q NOTE 5 NOTE 4 E_ ED r-_ NOTE4 _1-_- B ] HUM 0 HUM OUTDOOR I SENSOR See notes OUTDOOR SENSOR 1, 3, 4, and 5 L0gF026 I See notes 1,2, 3, 4, and 5 Figure 29 - Variable Speed Furnace with Single Stage H
Figure 32 - AC with Variable Speed Furnace, Humidifier, and Dehumidification HUMIDITY SENSING THERMOSTAT Figure 33 - HP with Variable Speed Furnace, Humidifier, and Dehumidification HUMIDITY SENSING THERMOSTAT VARIABLE SPEED FURNACE VARIABLE SPEED FURNACE , _ SPDT HUM J f RELAY i HUMIDIFIER 115 VAC "-_ 115 VAC _ See notes 6 and 7 See notes 7 and 8 LOgF029 L09F030 NOTES FOR FIGURES Figure 27 - Figure 33 1.
Figure 34 - Chimney Inspection Chart CHIMNEY INSPECTION CHART For additionalrequirementsrefer to the National Fuel Gas Code NFPA 54/ANSI Z223.1 and ANSI/NFPA 211 Chimneys, Fireplaces,Vents, and Solid Fuel BurningAppliances Crown condition: Missing mortar or brick? Rebuild crown. No Is chimney property lined with clay tile line_ No Yes Is liner and top seal in good condition? Repair liner or top seal or reline chimney as necessary.
Masonry Chimney Requirement NOTE: These furnaces are CSA design-certified for use in exterior tile-lined masonry chimneys with a factory accessory Chimney Adapter Kit. Refer to the furnace rating plate for correct kit usage. The Chimney Adapter Kits are for use with ONLY furnaces having a Chimney Adapter Kit number marked on the furnace rating plate. If a clay tile-lined masonry chimney is being used and it is exposed to the outdoors below the roof line, relining might be required.
Additional A 4-in. (102 mm) round vent elbow is supplied with the furnace. A 5-in. (127 mm) or 6- in. (152 mm) vent connector may be required for some model furnaces. A field-supplied 4-in. (102 mm) to 5-in. (127 mm) or 4-in. (102 mm) to 6-in. (152 mm) sheet metal increaser fitting is required when 5-in. (127 mm) or 6-in. (152 mm) vent connector is used. See Figure 35 - Figure 47, Venting Orientation for approved vent configurations.
Figure 35 - Upflow Application _o _ - Vent Elbow Up Figure 37 - Downflow Application Left - Vent Elbow Up then o_ 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 Figure 36 - Upflow Application - Vent Elbow Right A03210 Figure _-o 38 - Downflow Application - Vent Elbow Up 037 % f_ • SEE NOTES: 1,2,3,4,7,8,9 on the pages following these figures .
Figure 39 - Downflow Application - Vent Elbow Left then Up Figure 41 - Horizontal Left Application - Vent Elbow Left SEE NOTES: 1,2,4,7,8,9 on the page following these figures A03213 Figure 42 - Horizontal Left Application Right then Up - Vent Elbow l SEE NOTES: 1,2,4,5,6,7,8,9,10 on the page following these figures A03207 Figure 40 - Downflow Application Right - Vent Elbow Up then Io =o .
Figure 45 - Horizontal Left Application Right - Vent Elbow Figure 47 - Horizontal Right Application-Vent Elbow Left ,,. /-X SEE NOTES: 1,2,4,5,7,8,9 A02068 SEE NOTES: 1,2,4,5,7,8,9 VENTING on the page following these figures NOTES FOR Figure 35 - Figure 47 1. For common vent, vent connector sizing and vent material: United States--use the NFGC. 2. Immediately increase to 5-in. (102 mm) or 6-in. (152 mm) vent connector outside furnace casing when 5-in.
START-UP, ADJUSTMENT, CHECK AND SAFETY General FURNACE DAMAGE HAZARD Failure to follow this caution furnace life. FIRE HAZARD may result in reduced DO NOT redrill orifices. Improper drilling (burrs, out-of-round holes, etc.) can cause excessive burner noise and misdirection of burner flames. This can result in flame impingement of heat exchangers, causing failures. (See Figure 49) Failure to follow this warning could result in personal injury, death or property damage.
Start-Up Procedures FIRE OR EXPLOSION NOTE: The furnace control allows all components, except the gas valve, to be run for short period of time. This feature helps diagnose a system problem in case of a component failure. Component test feature will not operate if any thermostat signal is present at the control. HAZARD Failure to follow this warning could result in personal injury, death, and/or property damage. Refer to service label attached to furnace or See Figure 51.
Table 9 - Furnace Setup Switch Description SETUP SWITCH RCL m-? 1 LHT m-? 2 LHR C/E 3 v-i C SW1-2 4 CFM TST SW1-1 5 m-? 6 SW1-3 NORMAL POSITIOI_ DESCRIPTION Status Code Recovery Low Heat Only (Adaptive Heat Mode when SW1-2 is OFF) Low Heat Rise Adjustment OF USE OFF Turn ON to retrieve up to 7 stored status codes for troubleshooting when R thermostat lead is disconnected. assistance OFF When SW1-2 is OFF allows two-stage operation with a single stage thermostat.
Table 11 - Air Conditioning (A!C) SW2-6, 7, 8 or *Continuous-Fan BASED ON 400 CFM/TON A/C MODEL SIZE SW2 A/C -- OFF 876 ON nMn sw2 -- A/C OFF nng OFI ngn 87_ ON SETUP SWITCH _C sw2 .... SW1-5 ON & SW2-2 OFF _C sw2 ....
Table 12 -Air Delivery - CFM (with filter)* COOLING 4 AND HEATING AIR DELIVERY (SW1-5 and SW2-2 set to OFF, except Cooling Switch Settings SW2-8 SW2-7 SW2-6 0.1 0.
Air Delivery-CFM Notes 1. Nominal 350 CFM/ton cooling airflow is delivered with SW1-5 and SW2-2 set to OFF. Set both SW1-5 and SW2-2 to ON for +7% airflow (nominal 370 CFM/ton). Set SW1-5 to ON and SW2-2 to OFF for +15% airflow (nominal 400 CFM/ton). Set SW2-2 to ON and SW1-5 to OFF for -7% airflow (nominal 325 CFM/ton). 2. Maximum cooling airflow is achieved when switches SW2-6, 3. 4.
Furnace gas input rate on rating plate is for installations at altitudes up to 2000 Ft. (610 M). Furnace input rate must be within +/-2 percent of furnace rating plate input. For altitudes above 5500 Ft. (1676 M), a field-supplied high altitude pressure switch is required. 1. Determine the correct gas input rate. The input rating for altitudes above 2,000 ft. (610 M) must be reduced by 4 percent for each 1,000 ft. (305 M) above sea level. For installations below 2000 Ft.
5. Verify natural gas input rate by clocking meter. NOTE: Temperature rise can be determined for low-heat operation by placing setup switch SW1-2 on furnace control in ON position. For high-heat operation, place setup switch SW1-2 in OFF position and jumper R-W2 on furnace control. DO NOT forget to return setup switch to OFF position and remove R-W2 jumper upon completion of testing. a. Turn off all other gas appliances and pilots served by the meter. b. Move setup switch SWl-2 to ON position.
8. Set thermostat heat anticipator. a. Mechanical thermostat. Set thermostat heat anticipator to match the amp. draw of the electrical components in the R-W/W1 circuit. Accurate amp. draw readings can be obtained at the wires normally connected to thermostat subbase terminals, R and W. The thermostat anticipator should NOT be in the circuit while measuring current. (1 .) Set SW1-2 switch on furnace control board to ON. (2.) Remove thermostat from subbase or from wall. (3.) Connect an amp.
Table 15 - 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. (U) USA 0 to 2000 (oto 61o) ALTITUDE RANGE FT. (U) AVG. GAS HEAT VALUE AT ALTITUDE (BTUH/CU FT.) 900 925 950 975 1000 1025 1050 1075 1100 AVG. GAS HEAT VALUE AT ALTITUDE (BTUH/CU FT.
Table 15 - 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. (U) USA Orifice No. 675 700 725 750 775 800 825 850 43 44 44 45 46 46 47 47 AVG. GAS HEAT VALUE AT ALTITUDE (BTUH/CU FT.) Orifice No. 650 675 700 725 750 775 800 825 44 44 45 46 46 47 47 48 6001 to 7000 (1829 to 2134) ALTITUDE RANGE FT. (U) USA AVG.
h. Re-install vent connector. NOTE: Should switch remain open longer than 3 minutes, furnace control board will lockout the furnace for 3 hours. To reset furnace control board, turn thermostat below room temperature or from HEAT to OFF and turn 115-v power OFF, then back ON. 3. Check Pressure Switch(es) This control proves operation of the draft inducer blower. a. Turn off 115-v power to furnace. b. Disconnect inducer motor lead wires from wire harness. c. Turn on 115-v power to furnace. d.
wiring during installation, service, or maintenance will cause this fuse to blow. If fuse replacement is required, use ONLY a 3-amp. fuse. The control LED turn off when fuse needs to be replaced. Proper instrumentation is required to service electrical controls. The control in this furnace is equipped with a Status Code LED (Light-Emitting Diode) to aid in installation, servicing, and troubleshooting. Status codes can be viewed at the sight glass in blower access door.
Table 17 - 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. (U) 0 to 2000 USA (o to 61o) ALTITUDE RANGE FT. (U) 200t to 3000 (610 to 914) USA ALTITUDE RANGE FT. (U) 3001 to 4OOO(914 to 1219) USA ALTITUDE RANGE FT. (U) USA 4001 to 5000 (1219 to 1524) ALTITUDE RANGE FT.
Table 17 - 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. (U) AVG. GAS HEAT VALUE AT ALTITUDE (BTUH/CU FT.) Orifice No. 675 700 725 750 775 800 825 850 44 44 45 46 46 47 47 48 6001 to 7000 (1829 to 2134) USA ALTITUDE RANGE FT. (U) AVG. GAS HEAT VALUE USA ALTITUDE RANGE FT. (U) AT ALTITUDE (BTUH/CU FT.
Table 18 - Filter Size Information - In.
f. Hot surface igniter. g. Flame-sensing electrode. h. Flame rollout switches. ELECTRICALSHOCKHAZARD 6. Remove screws that fasten the collector box assembly to the cell panel. Be careful not to damage the collector box. Inducer assembly and elbow need not be removed from collector box. 7. Disconnect gas line from gas manifold. 8. Remove the four screws that attach the burner assembly to the cell panel. The gas valve and individual burners need not be removed from support assembly.
(3.) Work cable in and out of celt 3 or 4 times to obtain sufficient cleaning. DO NOT pull cable with great force. Reverse drill and gradually work cable out. (4.) Insert brush end of cable in burner inlet opening of cell, and proceed to clean 2 lower passes of cell in same manner as upper pass. (5.) Repeat foregoing procedures until each cell in furnace has been cleaned. 17. Set thermostat above room temperature and check furnace for proper operation. 18.
HPS are open, and starts the high-speed. a. Inducer Prepurge Period inducer motor IDM in (1 .) If the furnace control CPU selects low-heat operation the inducer motor IDM comes up to speed, the low-heat pressure switch LPS closes, and the furnace control CPU begins a 15-second prepurge period. If the low-heat pressure switch LPS fails to remain closed the inducer motor IDM will remain running at highspeed.
closed. The blower motor BLWM will transition to low-heat airflow five seconds after the R-to-W2 circuit opens. 3. Cooling mode The thermostat "calls for cooling". a. Single-Speed CoolingSee Figure 27 for thermostat connections The thermostat closes the R-to-G-and-Y circuits. The R-to- Y circuit starts the outdoor unit, and the R-to-G-and-Y/Y2 circuits start the furnace blower motor BLWM on cooling airflow. Cooling airflow is based on the A/C selection shown in Table 10.
delays have expired. Turn on setup switch SWl-6. (See Figure 26) NOTE: The component test feature will not operate if the control is receiving any thermostat signals or until all time delays have expired. The component test sequence is as follows: a. The furnace control CPU turns the inducer motor ON at high-heat speed and keeps it ON through step c. b. After waiting 10 seconds the furnace control CPU turns the hot surface igniter ON for 15 seconds, then OFF. c.
Troubleshooting Guide - ICP Variable Speed START Is AMBER LED status Is there light ON solid, alternately flashing bright-dim-bright-dim like a heartbeaL or flashing ON and OFF? 115Vat L1 and L2? Close p I--_ _ YES I Is there 24V at SEC-1 NO Is the 24V fuse I-'_ open? furnace I gOing tO switch? 115V I I Replace do°r Is AMBER LED status light ON solid? to make plug PL4 -4 thermostat control. Replace transformer. is installed.
NOTE: NUMBER IN UPPER LEFT HAND CORNER REPRESENTS FLASH CODE 2 PRESSURE Check for: - ---41 3 SWITCH DID NOT OPEN - LOW-HEAT PRESSURE SWITCH NOT CLOSE OR REOPENED during blower on-delay period, DID "_t - Proper vent sizing. Low inlet gas pressure - Inadequate combustion air supply, Disconnected or obstructed pressure tubing. - Defective Excessive or miswired wind. - Restricted Defective vent.
PARTS REPLACEMENT INFORMATION GUIDE CASING GROUP BLOWER GROUP Gas valve Outer door Blower housing Blower cutoff Manual reset limit switches Blower door Top filler plate Blower motor HEAT EXCHANGER Bottom filler plate Bottom enclosure Blower wheel Heat exchanger cell Capacitor (where used) Celt panel ELECTRICAL Capacitor strap (where used) Grommet Lox NOx baffle (California models only) Power choke (where used) GAS CONTROL GROUP INDUCER GROUP GROUP Control bracket Junction box Limit sw
