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31-5000728 Rev. 0 10-22 GEA

NF96US

96% Upflow/Horizontal Single Stage

Constant Torque Motor Gas Furnace

Service

Manual

READ CAREFULLY.

KEEP THESE INSTRUCTIONS

Содержание GE APPLIANCES NF96US

Страница 1: ...31 5000728 Rev 0 10 22 GEA NF96US 96 Upflow Horizontal Single Stage Constant Torque Motor Gas Furnace Service Manual READ CAREFULLY KEEP THESE INSTRUCTIONS...

Страница 2: ...is is a safety alert symbol and should never be ignored When you see this symbol on labels or in manuals be alert to the potential for personal injury or death Electric shock hazard Can cause injury o...

Страница 3: ...Ton 1 2 120 60 1 15 6 8 40 134 NF96U090S4C 88 000 85 000 96 4 Ton 1 2 120 60 1 15 8 4 40 158 NF96U110S5C 110000 106000 96 5 Ton 1 2 120 60 1 15 10 9 40 170 Note For vent length and clearances to comb...

Страница 4: ...0 00 1445 315 1315 215 1215 165 930 85 925 75 0 10 1445 335 1275 230 1170 180 905 94 860 80 0 20 1415 345 1240 240 1125 190 870 101 800 85 0 30 1380 355 1205 250 1090 200 830 109 760 95 0 40 1345 370...

Страница 5: ...1665 390 1050 180 2180 685 1910 460 1750 345 1660 285 1430 195 0 10 2185 680 1925 460 1750 345 1625 285 1440 200 2155 705 1885 480 1720 360 1610 295 1415 205 0 20 2150 705 1880 480 1710 365 1590 300...

Страница 6: ...ation 90 Furnaces Only US Only 51W11 2 3 Vent Version Concentric Vent Kit 90 Furnaces Only US Only 71M80 1 1 2 Vent Version 69M29 2 Vent Version 60L46 3 Vent Version Concentric Vent Kit 90 Furnaces On...

Страница 7: ...Page 7 31 5000728 Rev 0 Figure 1 Parts Arrangement...

Страница 8: ...exceeds this limit the breaker will trip and all unit operation will shutdown The breaker can be manually reset by pressing the button on the face Integrated Ignition Control A92 Shock hazard Disconne...

Страница 9: ...eat demand 4 Low Flame Signal check flame sensor 5 Watchguard burner failed to light exceeded maximum number of retries or recycles 6 Not Used 7 Primary or Secondary Limit Open or Watchguard Mode Limi...

Страница 10: ...moving the jumper to a different setting The unit is shipped with a factory fan off setting of 90 seconds For customized comfort monitor the supply air temperature once the heat demand is satisfied No...

Страница 11: ...ean without removing any part of the burners During operation flame is sensed by current passed through the flame and sensing electrode The ignition control allows the gas valve to remain open as long...

Страница 12: ...shut off If the gas valve must be replaced the same type valve must be used 24VAC terminals and gas control switch are located on top of the valve All terminals on the gas valve are connected to wire...

Страница 13: ...4 Set Dial to DC MicroAmps Multi Meter To Control Sensor Terminal To Flame Terminal Flame Sensor Terminal Flame Sensor Wire Intergrated Control Remove sensor from integrated control and connect alliga...

Страница 14: ...anifold and check resistance of ignitor at the plug Reading should be between 39 and 70 ohms If the reading is correct then the problem is with the wiring between the jack plug and the control If read...

Страница 15: ...across the combustion air inducer orifice to insure proper flow through the heat exchanger The switch is a SPST N O pressure switch electrically connected to the integrated control The purpose of the...

Страница 16: ...d with hose from the positive side of the manometer to the tee in the positive line NOTE tive However the port reads less negative pressure than the port 4 Operate unit and observe manometer reading R...

Страница 17: ...e 10A through Table 10F Wrong pressure switch installed in the unit or pressure switch is out of calibration Check that the correct pressure switch is installed in the unit Replace pressure switch if...

Страница 18: ...t in tests 1 and 2 and motor is not operating properly replace motor The motor is not field repairable If replacing the indoor blower motor or blower wheel is necessary placement is critical The blowe...

Страница 19: ...If 24 volts is not present problem may be up stream of plug P49 Proceed to test 4 Multi Meter set to VAC 12 0 12 0 24 Multi Meter set to VAC problem is with the harness If voltage is not present probl...

Страница 20: ...f the three motor connector pins These should all read approximately the same resistance within an ohm 3 Check to see if the blower wheel spins freely Figure 17 Motor Test Scale Measurement Range in W...

Страница 21: ...ow temperature solvent cement is recommended during cooler weather Metal or plastic strapping may be used for vent pipe hangers Uniformly apply a liberal coat of PVC primer for PVC or use a clean dry...

Страница 22: ...US 4 444W93 CA 045 1 1 1 2 3 YES 5 YES 2 YES N A N A 2 3 YES 5 YES 2 YES 2 1 2 3 YES 5 YES 2 YES 3 3 YES 5 YES 2 YES 070 1 1 1 2 3YES 5 YES 2 YES 2 3YES 5 YES 2 YES 2 1 2 3 YES 5 YES 2 YES 3 3 YES 5 Y...

Страница 23: ...sulation if required In areas where piping penetrates joists or interior walls hole must be large enough to allow clearance on all sides of pipe through center of hole using a hanger When furnace is i...

Страница 24: ...ing Terminations should be used Exhaust vent termination pipe is sized to optimize the velocity of the exhaust gas as it exits the termination Refer to Table 12 In some applications which permit the u...

Страница 25: ...ng Furnace capacity Which termination Which needs most elbows How many Desired pipe size What is the altitude Use Table 12A through Table 13 to find max pipe length or exhaust pipe length Includes all...

Страница 26: ...pipe outside the structure must be included in the total vent length calculation NOTE Contact your local FTC if more than 85ft of venting is needed Table 10A Maximum Allowable Intake or Exhaust Vent L...

Страница 27: ...vent pipe outside the structure must be included in the total vent length calculation NOTE Contact your local FTC if more than 85ft of venting is needed Table 10C Maximum Allowable Intake or Exhaust V...

Страница 28: ...pe outside the structure must be included in the total vent length calculation NOTE Contact your local FTC if more than 85ft of venting is needed Table 10E Maximum Allowable Exhaust Vent Lengths With...

Страница 29: ...2 2 6 MINIMUM Figure 23 TYPICAL EXHAUST PIPE CONNECTIONS IN HORIZONTAL DIRECT OR NON DIRECT VENT APPLICATIONS RIGHT HAND DISCHARGE SHOWN SIDE VIEW 45 MAX 45 MAX 2 2 2 2 or 2 12 max EXHAUST TRANSITION...

Страница 30: ...d flue gases are discharged outdoors 1 Use field provided materials and the factory provided air intake screen to route the intake piping as shown in Figure 27 or Figure 28 Maintain a minimum clearanc...

Страница 31: ...own If this unit is being installed in an application with combustion air coming in from a space serviced by an exhaust fan power exhaust fan or other device which may create a negative pressure in th...

Страница 32: ...haust pipe length without insulation in unconditioned space during winter design temperatures below 32 F 0 C If required exhaust pipe should be insulated with 1 2 13mm Armaflex or equivalent In extrem...

Страница 33: ...nimum Design Temperature table provided in the current edition of the ASHRAE Fundamentals Handbook 2 Poly Propylene vent pipe PP by Duravent and Centrotherm 3 Vent length in table is equivalent length...

Страница 34: ...the combustion air inlet to any other appliance 6 152mm for appliances 10 000 Btuh 3kw 9 228mm for appliances 10 000 Btuh 3kw and 50 000 Btuh 15kw 12 305m for appliances 50 000 Btuh 15kw 6 152mm for a...

Страница 35: ...terminations NOTE When venting in different pressure zones the maximum separation requirement of intake and exhaust pipe DOES NOT apply 3 On roof terminations the intake piping should terminate straig...

Страница 36: ...mm accelerator provided on 71M80 44W92 kits for 045 and 070 models 12 305mm INTAKE AIR EXHAUST VENT Figure 39 Direct Vent Concentric Wall Termination 71M80 69M29 or 60L46 US 44W92 or 44W93 Canada 12 3...

Страница 37: ...earance under veranda porch deck or balcony 12 Equal to or greater than soffit depth 3 feet 9m 12 3 feet 9m within a height 15 feet 4 5m above the meter regulator assembly 3 feet 9m 6 inches 152mm for...

Страница 38: ...If exhaust piping must be run up a side wall to position above snow accumulation or other obstructions piping must be supported every 24 inches 610mm When exhaust piping must be run up an outside wal...

Страница 39: ...bove grade or average snow accumulation B Horizontal separation between intake and exhaust C Minimum from end of exhaust to inlet of intake D Exhaust pipe length E Wall support distance from top of ea...

Страница 40: ...for all provinces of Canada GEA approves the following termination for use in all provinces of Canada C 12 D B A 2 51MM Vent Pipe 3 76MM Vent Pipe 12 305 mm Min 12 305 mm Min 6 152 mm Min 24 610 mm Ma...

Страница 41: ...all joints Glue the provided drain trap as shown in Figure 53 or Figure 54 Route the condensate line to an open drain Condensate line must maintain a 1 4 downward slope from the furnace to the drain 5...

Страница 42: ...ure 49 Evaporator Coil Using a Separate Drain Unit shown in upflow position with remote trap Piping from furnace must slope down a minimum of 1 4 per ft toward trap Field provided vent min 1 above con...

Страница 43: ...max 4 min 5 max Evaporator drain line required Condensate drain connection Trap at coil is optional Field provided vent 1 min 2 max above condensate drain connection Furnace condensate drain connecti...

Страница 44: ...h PVC Pipe Not Furnished Drain Assembly for 3 4 inch Drain Pipe Condensate Drain Connection In Unit Condensate Drain Connection In Unit Vent To Drain Condensate Drain Connection In Unit Optional Conde...

Страница 45: ...inch PVC To Drain 90 Elbow 1 2 inch PVC Not Furnished 1 2 inch PVC Pipe Not Furnished Drain Assembly for 3 4 inch Drain Pipe 90 Street Elbow 1 2 inch PVC Not Furnished Condensate Drain Connection In...

Страница 46: ...ing demand 5 Wait for the combustion air inducer to stop Set the thermostat to initiate a heating demand and again allow the burners to fire for approximately 3 minutes 6 Adjust the thermostat to deac...

Страница 47: ...ing to the gas valve WARNING Gas supply piping should not allow more than 0 5 W C drop in pressure between gas meter and unit Supply gas pipe must not be smaller than unit gas connection Compounds use...

Страница 48: ...h unit should be checked separately with and without other units operating Supply pressure must fall within range listed in Table 15 Manifold Pressure Measurement Follow the steps below and use Figure...

Страница 49: ...10 000 ft 0 4500 ft 4501 5500 ft 5501 6500 ft 6501 7500 ft 7501 10000 ft All Sizes Natural 3 5 3 3 3 2 3 1 3 5 4 5 13 0 LP Propane 10 0 9 4 9 1 8 9 10 0 11 0 13 0 NOTE A natural to LP propane gas chan...

Страница 50: ...he voltage between Line Neutral and C as a function of load indicates a poor or partial ground Compare the readings to Table 18 If the readings exceed the maximum shown in Table 18 make repairs before...

Страница 51: ...urn air plenums Insert manometer hose flush with inside edge of hole or insulation Seal around the hose with permagum Connect the zero end of the manometer to the discharge supply side of the system O...

Страница 52: ...ss foam filters If the pressure drop is too great system capacity and performance may be reduced The pressure drop may also cause the limit to trip more frequently during the winter and the indoor coi...

Страница 53: ...e necessary to cut the exiting exhaust pipe for removal of the fitting 12 Mark and disconnect all combustion air pressure tubing from cold end header collector box 13 Mark and remove wires from pressu...

Страница 54: ...ertain metals Carefully rinse piping thoroughly after leak test has been completed Do not use matches candles flame or other sources of ignition to check for gas leaks CAUTION Cleaning the Burner Asse...

Страница 55: ...Page 55 31 5000728 Rev 0 Wiring Diagram 045 3B 070 3B 090 4C 110 5C...

Страница 56: ...MPROPER GROUND LED FLASHES CODE 13 LOW LINE VOLTAGE CONTROL WILL NOT RESPOND TO A CALL FOR HEATING UNTIL VOLTAGE RISES ABOVE 75 VOLTS LED FLASHES CODE 8 ROLLOUT SWITCH OPEN GAS VALVE OFF COMBUSTION AI...

Страница 57: ...ME SIGNAL 1 5 MICROAMPS OR GREATER FLAME PRESENT 15 SECONDCOMBUSTIONAIRINDUCERPREPURGE INITIATEDBYCLOSEDPRESSURESWITCH IGNITOR WARM UP 20 SECONDS 4 SECOND TRIAL FOR IGNITION GAS VALVE OPENS IGNITOR EN...

Страница 58: ...FLASHES CODE 13 LOW VOLTAGE CONTROL WILL CONTINUE TO CALL FOR COOLING IN THIS CONDITION LED FLASHES CODE 8 ROLLOUT SWITCH OPEN GAS VALVE OFF COMBUSTION AIR INDUCER ON INDOOR BLOWER ON SEQUENCE HOLDS U...

Страница 59: ...PEED EAC TERM REMAINS ON THERMOSTAT OPENS THERMOSTAT OPENS MANUAL FAN SELECTION MADE AT THERMOSTAT CONTROL G ENERGIZES SYSTEM FAN AT FAN SPEED EAC TERM ENERGIZED SYSTEM FAN SWITCHES TO HEAT SPEAD AFTE...

Страница 60: ...Page 60 31 5000728 Rev 0 Printed in the U S A All specifications and illustrations subject to change without notice and without incurring obligations...

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