TECHNICAL MANU TECHNICAL MANUAL
Contents
1. X it BLOWER COMPARTMENT BURNER COMPARTMENT 2 25 Upflow Horizontal Gas Valve 17 Gas Line Entrance Alternate 18 Pressure Switch 19 Gas Manifold 20 Combustion Air Intake Connection Coupling 21 Hot Surface Igniter 22 Rollout Limit 23 Burners 24 Flame Sensor Flue Pipe Connection Coupling 25 Flue Pipe Internal 26 Primary Limit 27 Gas Line Entrance 28 Flue Pipe Connection Alternate 29 Rubber Elbow 30 Induced Draft Blower 31 Electrical Connection Inlets Alternate Coil Front Cover Pressure Tap Coil Front Cover Drain Port Drain Line Penetrations Drain Trap Blower Door Interlock Switch Capacitor Integrated Control Module with fuse and diagnostic LED 24 Volt Thermostat Connections Transformer 40 VA Circulator Blower Auxiliary Limit Junction Box Electrical Connection Inlets Coil Front Cover COMPONENT IDENTIFICATION GMH95 XA AIR DISCHARGE AIR L DISCHARGE lt 28 3 4 gt gt VENT FLUE S4 g 3 4 gt 13 63 212 DISCHARGE 2 PVC MEE _ STANDARD GAS ALTERNATE PIPE SUPPLY HO2. LYVHO ASIY 1 SA LNdLNO 1 01 0 06 Ov 0S 09 0 08 06 00 3514 1 13 WIRING DIAGRAMS GMH95 0453 0704 0905 XAB GMH95 0703 0904 1155 XAC 24 VAC BLOWER 3 INTEGRATED COMPARTMENT CONTROL MODULE HUMIDIFIER DOOR SWITCH OPEN WHEN 24 VAC DOOR 40 V TRANSFORMER 115 VAC 24V THERMOSTAT CONNECTIONS 4 ID BLOWER FRONT COVER PRESSURE PRESSURE SWITCH FUSE INTEGRATED CONTROL MODULE ON OFF MANUAL RESET AUXILIARY LIMIT CONTROLS NE LMT CONTROL SNOLLO3NNOO 1V1SOWH3HL MANUAL RESET ROLLOUT LIMIT CONTROL S SINGLE CONTROL ON 45K BTU 24 OFF O 40 VA FACTORY SETTINGS TRANSFORMER SHOWN y el 115 VAC Wc FLAME SENSOR DIAGNOSTIC es I HOT SURFACE IGNITER COOL H HEAT H q d f SEE NOTE 4 WI STVNINH3L __ OVA BK HI BL MED OR MED LOW RD LOW CIRCULATOR BLOWER FINGOW STW LOAN INN FINGOW 1OHLNOO G31VH93INI CAPACITOR ELECTRONIC BLOWER COMPARTMENT AIR CLEANER BURNER COMPARTMENT UXILIARY LIMITS 1 INUPFLOW BLOWER DECK 2 IN CFLOW BLOWER HOUSING INDUCED DRAFT BLOWER DISCONNECT POWER BEFORE SERVICING AUTO RESET WIRING TO UNIT PRIMARY LIMIT MUST BE CONTROL PROPERLY BL POLARI
3. GMH950904CXA MED HI GMH950905DXA MED HI GMH951155DXA MED HI CFM in chart is without filters s Filters do not ship with this furnace but must be provided by the installer If the furnace requires two return filters this chart assumes both filters are installed All furnaces ship as high speed cooling and medium speed heating Installer must adjust blower cooling amp heating speed as needed For most jobs about 400 CFM per ton when cooling is desirable INSTALLATION IS TO BE ADJUSTED TO OBTAIN TEMPERATURE RISE WITHIN THE RANGE SPECIFIED ON THE RATING PLATE The chart is for information only For satisfactory operation external static pressure must not exceed value shown on rating plate The shaded area indicates ranges in excess of maximum external static pressure allowed when heating The data for 0 6 w c to 0 8 w c is shown for air conditioning purposes only Ps O 6 The above chart is for U S furnaces installed at 0 2000 feet At higher altitudes a properly de rated unit will have approximately the same temperature rise at a particular CFM while the ESP at that CFM will be lower 12 BLOWER PERFORMANCE SPECIFICATIONS 091 081 021 0001 X LNdLNO 011 001 06 08 0 09 0S Ov 0 801 IN39 LAdLNO NLA SV InWHOJ 3514 X 807 E X W49 W49 009
4. 2917 TECHNICAL MANUAL GMH95 40 95 Gas Furnace Referto Service Manual RS6610004 for installation operation and troubleshooting information All safety information must be followed as provided in the Service Manual Refer to the appropriate Parts Catalog for part number information Model numbers listed on page 3 amp C US Liste This manual is to be used by qualified professionally trained HVAC technicians only RT6612018 Rev 5 Goodman does not assume any responsibility for property damage or personal April 2010 injury due to improper service procedures or services performed by an unqualified person Copyright 2007 2009 2010 Goodman Manufacturing Company L P PRODUCT IDENTIFICATION The model and manufacturing number are used for positive identification of component parts used in manufacturing Please use these numbers when requesting service or parts information Minior Revision G Goodman Air Flow Direction M Upflow Horizontal D Dedicated Downflow C Downflow Horizontal H Hi Air Flow Description H Dual aver Multi Speed V Two Stage Variable Speed 9 90 95 95 KBTUH 045 45 000 070 70 000 090 90 000 115 115 000 140 140 000 HIGH VOLTAGE 45 WARNING Major Revision A Initial Release NOx N Natural Gas X Low NOx Cabinet Width A 14 B 17 1 2 21 D 24 1 2 Maxi
5. AIRCLEANER JUNCTION BOX DOOR SWITCH N WARNING DISCONNECT POWER BEFORE SERVICING WIRING TO UNIT MUST BE PROPERLY 1 DISCONNECT POLARIZED e AND GROUNDED L GND N TO 115VAC 1 60 HZ POWER SUPPLY WITH OVERCURRENT PROTECTION DEVICE LN WARNING DISCONNECT POWER BEFORE JUNCTION SERVICING WIRING TO UNIT MUST BE PROPERLY POLARIZED AND GROUNDED SMS goad r L E cel eem 9235 525 J l haw 1 L 9 L FLAME edr 5 SENSOR CTI g LOW VOLTAGE 24V LOW VOLTAGE FIELD HI VOLTAGE 115V EQUIPMENT GND FIELD GND th FIELD SPLICE 1 IN UPFLOW GND BLOWER DECK 2 IN CFLOW BK LL BLOWER HOUSING WH LL wH INDUCED DRAFT BLOWER Or WH AUTO RESET PRIMARY LIMIT PU CONTROL BL YL RD oR Bm PK WH I ID BLOWER I MANUAL RESET ROLLOUT LIMIT CONTROL S PRESSURE SAAG SINGLE CONTROL ON 45K BTU SWITCH POMIFIER FRONT COVER PRESSURE SWITCH 2 CIRCUIT PM GY GND 2 HOT SURFACE IGNITER H OR GAS VALVE HONEY WELL STEADY ON NORMAL OPERATION OFF CONTROL FAILURE ITF 1 FLASH SYSTEM LOCKOUT RETRIES EXCEEDED 2 FLASHES PRESSURE SWITCH STUCK CLOSED FLASHES PRESSURE SWITCH STUCK OPEN 4 FLASHES OPEN HIGH LIMIT 5 FLASHES
6. FLAME SENSE WITHOUT GAS VALVE 6 6 FLASHES OPEN ROLLOUT OR OPEN FUSE 7 FLASHES LOW FLAME SIGNAL C CONTINUOUS COLOR CODES YL YELLOW OR ORANGE PU PURPLE GN GREEN BK BLACK 8 8 FLASHES CHECK IGNITER OR IMPROPER GROUNDING RAPID FLASHES REVERSED 115 POLARITY HI VOLTAGE FIELD Oe m NOTES PK PINK 1 SET HEAT ANTICIPATOR ON ROOM THERMOSTAT AT 0 7 AMPS BR BROWN 2 MANUFACTURERS SPECIFIED REPLACEMENT PARTS MUST BE USED WHEN SERVICING WH WHITE BLBLUE HAVING A TEMPERATURE RATING OF AT LEAST 105 C USE COPPER CONDUCTORS ONLY En ud BLOWER LEADS MUST BE PLACED ON PARK TERMINALS OF INTEGRATED CONTROL OR TAPED 0140F00663 REV A STANDBY NO THERMOSTAT INPUTS 5 UNIT MUST BE PERMANENTLY GROUNDED AND CONFORM TO N E C AND LOCAL CODES 6 TO RECALL THE LAST 5 FAULTS MOST RECENT TO LEAST RECENT DEPRESS SWITCH FOR MORE THAN 2 SECONDS WHILE IN SWITCH TEMP JUNCTION ae IGNITER uru TERMINAL INTERNAL TO SWITCH PRESS c INTEGRATED CONTROL OVERCURRENT PLUG CONNECTION PROT DEVICE IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE FURNACE MUST BE REPLACED IT MUST BE REPLACED WITH WIRING MATERIAL 4 IF HEATING AND COOLING BLOWER SPEEDS ARE NOT THE SAME DISCARD JUMPER BEFORE CONNECTING BLOWER LEADS UNUSED Wiring is subject to change always refer to the wiring diagram on the unit for the most up to date wiring 15
7. i H gt WARNING GMH95 0453 0704 0905 XAC GMH95 0703 0904 1155 XAD BLOWER HUMIDIFIER COMPARTMENT DOOR SWITCH WHEN ES VAC DOOR OPEN 115VAC 24V THERMOSTAT CONNECTIONS c G R W v BK o co FUSE INTEGRATED CONTROL MODULE ON OFF 2ND STAGE B E MODE E c DELAY FACTORY SETTINGS n SHOWN Be 25 z x E DIAGNOSTIC SEE i b LED NOTE 6 115 VAC HOT AND PARK TERMINALS COOLH HEAT H SEE LINE H GND NOTE 4 WH BK HI RD BL MED OR MED LOW RD LOW CIRCULATOR BR ga BLOWER CAPACITOR ow p BLOWER COMPARTMENT MANUAL RESET BURNER COMPARTMENT AUXILIARY LIMITS HM a HUMIDIFIER INTEGRATED CONTROL MODULE GAS HI VALVE ID BLOWER PRESSURE SWITCH FRONT COVER PRESSURE SWITCH PSO 4 HLI 7 HLO 1 MANUAL RESET AUXILIARY AUTO RESE LIMIT CONTROLS PRIMARY RO2 11 e e CONTROL RO1 5 MANUAL RESET ROLLOUT LIMIT CONTROL S SINGLE CONTROL ON 45K BTU 24 VAC XFMR H 115 VAC 40 VA TRANSFORMER FLAME SENSOR HOT SURFACE IGNITER STVYLNAN JINON Q31VH931NI ELECTRONIC ELECTRONIC
8. Li r gt u lt d Or ui 5 mo cw oc Sw oz 240 zl D al aH Be 5 5 o oz a5 HIGH VOLTAGE LOW VOLTAGE 24V FIELD SPLICE WARNING 3 NOTES COLOR CODES PK PINK 1 SET HEAT ANTICIPATOR ON ROOM THERMOSTAT AT 0 7 AMPS YL YELLOW BR BROWN 2 MANUFACTURER S SPECIFIED REPLACEMENT PARTS MUST BE USED WHEN SERVICING OR ORANGE WH WHITE 3 IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE FURNACE MUST BE REPLACED IT MUST BE REPLACED WITH WIRING MATERIAL PU PURPLE BL BLUE HAVING A TEMPERATURE RATING OF AT LEAST 105 C USE COPPER CONDUCTORS ONLY GN GREEN GY GRAY 4 IF HEATING AND COOLING BLOWER SPEEDS ARE NOT THE SAME DISCARD JUMPER BEFORE CONNECTING BLOWER LEADS UNUSED BLOWER LEADS MUST BE PLACED ON PARK TERMINALS OF INTEGRATED CONTROL OR TAPED BK BLACK RD RED 5 UNIT MUST BE PERMANENTLY GROUNDED AND CONFORM TO N E C AND LOCAL CODES 6 TO RECALL THE LAST 5 FAULTS MOST RECENT TO LEAST RECENT DEPRESS SWITCH FOR MORE THAN 2 SECONDS WHILE IN 01 40 F00592 REV A STANDBY NO THERMOSTAT INPUTS Wiring is subject to change always refer to the wiring diagram on the unit for the most up to date wiring 14 WIRING DIAGRAMS UNIT MULTIPLE POWER SOURCES MAY BE PRESENT FAILURE TO DO SO MAY CAUSE PROPERTY PERSONAL INJURY OR DEATH o I 2 l o z oc gt ic oc u m oc o a l lt 2 2 o
9. LE GAS SUPPLY 2 PVC CONDENSATE DRAIN TRAP 4 ALTERNATE HOLE wl 3 4 PVC VENTIFLUE HIGH VOLTAGE __ DISCHARGE a LOCATION ELECTRICAL HOLE RIGHT OR a 40 LEFT SIDE HIGH VOLTAGE LEFT SIDE Q 4 amp ELECTRICAL HOLE DRAIN LINE HOLES SLES lt RIGHT SIDE 112 en DRAW PRANTINE i tW LOW VOLTAGE LOW VOLTAGE ELECTRICAL HOLE ELECTRICAL HOLE 165 8 SIDE CUT OUT SIDE CUT OUT Y 221 16 p D UNFOLDED FLANGES UNFOLDED FLANGES 23 9 16 FOLDED FLANGES FOLDED FLANGES LEFT SIDE VIEW FRONT VIEW RIGHT SIDE VIEW GMH950453BXA GMH950703BXA 17 1 2 12 15 16 12 1 8 13 5 8 GMH950704CXA GMH950905DXA GMH951155DXA 24 1 2 20 746 19 3 8 20 7 8 All dimensions are in inches Note Airflow area will be reduced by approximately 1896 if duct flanges are not unfolded This could cause performance issues and noise issues PRODUCT DESIGN PRESSURE SWITCH TRIP POINTS AND USAGE CHART PRESSURE SWITCH TRIP POINTS AND USAGE PRESSURE PRESSURE PRESSURE PRESSURE ID BLOWER ID BLOWER COIL COVER COIL COVER 0 to 7 000 ft 7 001 to 11 000 ft WITH FLUE WITHFLUE WITHFLUE WITH FLUE NEGATIVE NEGATIVE NEGATIVE NEGATIVE MODEL NOTFIRING FIRING NOTFIRING FIRING TYPICAL TYPICAL typica TRIP POINT COIL COVER TRIPPOINT ID BLOWER TRIP POINT TRIP POIN
10. T SEA SEA SEA sea COIL PRESSURE ID BLOWER PRESSURE COILCOVER IDBLOWER HIGH LEVEL LEVE LEVEL LEVE PRESSURE SWITCH PRESSURE SWITCH PRESSURE PRESSURE ALTITUDE KIT DATA DATA DATA SWITCH PART SWITCH PART SWITCH SWITCH GMH950453BXA 1 30 1 10 0 52 0 37 20197312 1 10 0130F00000P a gt 1 Data given is least negative pressure required for pressure switch to close 2 Data given is the least negative pressure required for pressure switch to remain closed T O D PRIMARY LIMIT Open Setting F 160 GMH950453BXA GMH950703BXA GMH950904CXA GMH950905DXA GMH951155DXA 1 EC DL sasa PRODUCT DESIGN ROLLOUT LIMIT SWITCHES Part Number 10123514or 10123533 200 Open Setting F GMH950453BXA GMH950703BXA GMH950704CXA GMH950904CXA GMH950905DXA GMH951155DXA 10122505 swa Lowe Lowe Lewes Lewes PRODUCT DESIGN Coil Matches A large array of brand coils are available for use with the GMH95 furnaces in either upflow or horizontal applica tions These coils are available in both cased and uncased models with the option of a field installed TXV expansion device These 95 furnaces match up with the existing Amana brand coils as shown in the chart below Coil Matches for Goodman units using R22 an
11. ZED AND GROUNDED GND N 115VAC 1 60 HZ POWER SUPPLY WITH Ua OVERCURRENT PROTECTION DEVICE WH WARNINGDISCONNECT POWER BEFORE ID BLOWER MANUAL RESET ROLLOUT LIMIT CONTROL S SERVICING WIRING TO UNIT MUST BE PRESSURE vac SINGLE CONTROL ON 45K BTU L Ne ON PROPERLY POLARIZED AND GROUNDED SWITCH HUMPIFIER FRONT COVER PRESSURE SWITCH 7 2 CIRCUIT ap s q N CONNECTOR 1 GND HOT Ae SURFACE IGNITER ELAME GAS VALVE SENSOR eem STEADY ON NORMAL OPERATION OFF CONTROL FAILURE EQUIPMENT GND 1FLASH SYSTEM LOCKOUT RETRIES EXCEEDED LOW VOLTAGE FIELD FIELD GND 2 FLASHES PRESSURE SWITCH STUCK CLOSED HI VOLTAGE 115V 3 FLASHES PRESSURE SWITCH STUCK OPEN HI VOLTAGE FIELD 4 FLASHES OPEN HIGH LIMIT JUNCTION SWITCH 5 FLASHES FLAME SENSE WITHOUT GAS VALVE IGNITER 6 FLASHES ROLLOUT OR FUSE 7 FLASHES LOW FLAME SIGNAL INTERNAL TO SIRE SS 078e INTEGRATED CONTROL OVERCURRENT 8 FLASHES CHECK IGNITER OR IMPROPER GROUNDING PLUS GONNEG ION PROT DEVICE gt CONTINUOUS RAPID FLASHES REVERSED 115 VAC POLARITY HLIM THO H YASH OL N011093108d lt a tc gt tc 2 z lt o x ui o lt lt a gt o o lt gt lt o a o F 25 dz o LE aa oc on orc Za
12. and installation 1 or 2 pipes The optional Combustion Air Pipe is dependent on installation code requirements and must be 2 or 3 diameter PVC 2 Line voltage wiring can enter through the right or left side of the furnace Low voltage wiring can enter through the right or left side of furnace 3 Conversion kits for high altitude natural or propane gas operation are available See High Altitude Derate chart for details 4 Installer must supply the following gas line fittings de pending on which entrance is used Left Two 90 Elbows one close nipple straight pipe Right Straight pipe to reach gas valve Accessibility Clearances Minimum MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS INCHES FRONT SIDES REAR TOP FLUE FLOOR 3 0 o t C Horizontal 3 6 e c All positioning is determined as installed unit is viewed from the front C f placed on combustible floor floor MUST be wood only NC For instalaltion on non combustible floors only A non combustible subbase must be used for installations on combustible flooring 24 at front is required for servicing or cleaning Note In all cases accessibility clearance shall take prece dence over clearances from the enclosure where accessibil ity clearances are greater All dimensions are given in inches High Altitude Derate When this furnace is installed at high altitude the appropr
13. ch Trip Point w c Front Cover Pressure Switch Trip Point w c Blower Wheel D x W Blower Horsepower Blower Speeds Max CFM 0 5 E S P Power Supply 115 60 1 Minimum Circuit Ampacity 13 8 Maximum Overcurrent Device 15 0 Transformer VA Primary Limit Setting F Auxiliary Limit Setting F Rollout Limit Setting F Fan Delay On Heating 30 secs 30 secs 30 secs 30 secs 30 secs 30 secs Off Heating 150 secs 150 secs 150 secs 150 secs 150 secs 150 secs Fan Delay On Cooling 6 sec 6 sec 6 sec 6 sec 6 sec 6 sec Off Cooling 45 secs 45 secs 45 secs 45 secs 45 secs 45 secs Gas Supply Pressure Natural Propane w c Manifold Pressure Natural Propane w c Orifice Size Natural Propane Number of Burners Vent Connector Diameter inches Combustion Air Connector Diameter inches Shipping Weight Ibs Wire size should be determined in accordance with National Electrical Codes Extensive wire runs will require larger wire sizes Maximum Overcurrent Protection Device May use Time Delay Fuse or HACR type Circuit Breaker of the same size as noted Heating this fan delay timing is adjustable 100 and 150 seconds Furnaces are shipped with 150 second off delay 4 See Installation Instructions for appropriate vent diameter length and number of elbows See Installation Instructions for appropriate combustion air pipe diameter length and number of elbow
14. d R 410A TYPE F Flowrater C Indoor Coil REFRIGERANT CHARGE 6 R 410A or R 22 CABINET FINISH 2 R 22 U Unpainted 4 R 410a P Painted N Unpainted Case NOMINAL WIDTH FOR GAS FURNACE A Fits 14 Furnace Cabinet APPLICATION B Fits 17 1 2 Furnace Cabinet A Upflow Downflow Coil C Fits 21 Furnace Cabinet H Horizontal A Coil D Fits 24 1 2 Furnace Cabinet S Horizontal Slab Coil N Does Not Apply Horizontal Slab Coils NOMINAL CAPACITY RANGE 13 SEER 1824 1 1 2 to 2 Tons 3030 2 1 2 Tons 3636 3 Tons 3642 3 to 3 1 2 Tons 3743 3 to 3 1 2 Tons 4860 4 amp 5 Tons 4961 4 amp 5 Tons All CAPF coils in B C amp D widths have insulated blank off plates for use with one size smaller furnaces All CAPF coils have a CAUF equivalent All CHPF coils in B C amp D heights have an insulated Z bracket for use with one size smaller furnace All proper coil combinations are subject to being ARI rated with a matched outdoor unit PRODUCT DESIGN Thermostats NOTE Complete lineup of thermostats can be found in the Thermostat Specification Sheets Filters Filters are required with this furnace and must be provided by the installer The filters used must comply with UL900 or CAN ULCS 1 11 standards Installing this furnace without filters will void the unit warranty Upflow Filters This furnace has provisions for the installation of return air filters at the side and or bottom return The furnace w
15. i ate High Altitude orifice kit must be installed This is re quired due to the natural reduction in the density of both the gas fuel and combustion air as altitude increases The kit will provide the proper design certified input rate within the specified altitude range PROPANE AND HIGH ALTITUDE KITS MODEL 0 to 7 001 to 9 001 to NUMBER 7 000 ft 9 000 ft 11 000 ft LPM 05 7 001 to 11 000 ft HANG11 HANG12 High Altitude High Altitude Natural Gas Kit Natural Gas Kit 44 Orifices 45 Orifices HALP 10 High Altitude LP Gas Kit 56 Orifices LPM 06 Propane Conversion Kit 55 Orifices 1 LPM 05 supports White Rodgers 2 stage valves only PM 06 supports Honeywell and White Rodgers 2 stage valves High altitude kits are purchased according to the installa tion altitude and usage of either natural or propane gas Refer to the chart above for a tabular listing of appropriate altitude ranges and corresponding manufacturer s high altitude Natu ral Gas and Propane Gas kits For a tabular listing of appro priate altitude ranges and corresponding manufacturer s High Altitude Pressure Switch kits refer to either the Pressure Switch Trip Points amp Usage Chartin this manual or the Ac cessory Charts in Service Instructions COMPONENT IDENTIFICATION ON O N k sk k k k k NN o
16. ill accommodate the following filter sizes depending on cabinet size SIDE RETURN BOTTOM RETURN Cabinet Nominal Approx Cabinet Nominal Approx Width Filter Size Flow Area Width Filter Size Flow Area in in 1 Flanges on bottom return must be unfolded Referto Minimum Filter Areatables to determine filter area requirement NOTE Filters can also be installed elsewhere the duct system such as a central return COOLING AIRFLOW REQUIREMENT CFM COOLING AIRFLOW REQUIREMENT CFM Fee Tee eT so moor pm or m seme per or n E mee 0904 an aw Input_ Airflow Input_ Airflow oe r 97 971 971 971 vsu 1155DXA Minimum filter area dictated by heating airflow requirement Minimum filter area dictated by heating airflow requirement Disposable Minimum Filter Area in Permanent Minimum Filter Area in Based on a 300 ft min filter face velocity Based on 600 ft min filter face velocity 10 FURNACE SPECIFICATIONS GMH95 Btuh Input US 115 000 Output US 110 500 Input CAN 115 000 Output CAN 110 500 A F U E 95 0 Rated External Static w c Temperature Rise F ID Blower Pressure Swit
17. lure to follow these regulations may harm the environment and can lead to the imposition of substantial fines These regulations may vary by jurisdiction Should questions arise contact your local EPA office Do not connect or use any device i A WARNING prevent the risk of property that is not design certified by A WARNING damage personal injury or death G dman for with IRIS do not store combustible materials or use gasoline or Serlous property damage personal injury reduced unit other flammable liquids or vapors in the vicinity of this performance and or hazardous conditions may result appliance from the use of such non approved devices PRODUCT DESIGN General Operation The GMH95 furnaces are equipped with an electronic igni tion device used to light the burners and an induced draft blower to exhaust combustion products An interlock switch prevents furnace operation if the blower door is not in place Keep the blower access door in place except for inspection and maintenance This furnace is also equipped with a self diagnosing elec tronic control module In the event a furnace component is not operating properly the control module LED will flash on and off in a factory programmed sequence depending on the problem encountered This light can be viewed through the observation window in the blower access door Refer to the Troubleshooting Charttor further explanation of the LED codes and Abn
18. mum CFM 0 5 ESP 3 1200 4 1600 5 2000 Disconnect ALL power before servicing or installing this unit Multiple power sources may be present Failure to do so may cause property damage personal injury or death A WARNING Goodman will be responsible for any injury or property damage arising from improper service or service procedures If you install or perform service on this unit you assume responsibility for any personal injury or property damage which may result Many jurisdictions require a license to install or service heating and air conditioning equipment Installation and repair of this unit A WARNING Should be performed ONLY by individuals meeting the require ments of an entry level technician at a minimum as specified by the Air Conditioning Heating and Refrigera tion Institute AHRI Attempting to install or repair this unit without such background may result in product damage personal injury or death PRODUCT IDENTIFICATION The model and manufacturing number are used for positive identification of component parts used in manufacturing Please use these numbers when requesting service or parts information GMH950453BXA GMH950703BXA GMH950704CXA GMH950904CXA GMH950905DXA GMH951155DXA A WARNING The United States Environmental Protection Agency EPA has issued various regulations re garding the introduction and disposal of refrigerants introduced into this unit Fai
19. ormal Operation Integrated Ignition Control section in the Service Instructions for an explanation of the possible problem The rated heating capacity of the furnace should be greater than or equal to the total heat loss of the area to be heated The total heat loss should be calculated by an approved method or in accordance with ASHRAE Guide or Manual J Load Calculations published by the Air Conditioning Con tractors of America Obtain from American National Standards Institute 1430 Broadway New York NY 10018 Location Considerations The furnace should be as centralized as is practical with respect to the air distribution system Donotinstallthe furnace directly on carpeting tile or combustible material other than wood flooring When suspending the furnace from rafters or joists use 3 8 threaded rod and 2 x 2 x 3 8 angle as shownin the Installation and Service Instructions The length of the rod will depend on the application and clearance necessary When installed in a residential garage the furnace must be positioned so the burners and ignition source are located not less than 18 inches 457 mm above the floor and protected from physical damage by ve hicles Notes 1 Installer must supply one or two PVC pipes one for com bustion air optional and one for the flue outlet required Vent pipe must be either 2 or 3 in diameter depending upon furnace input number of elbows length of run
20. s NOTE This data is provided as a guide it is important to electrically connect the unit and properly size fuses circuit breakers and wires in accordance with all national and or local electrical codes Use copper wire only 1 These furnaces are manufactured for natural gas operation Optional kits are available for conversion to propane operation 2 For elevations above 2000 feet the rating should be reduced by 4 for each 1000 feet above sea level The furnace must not be derated orifice changes should only be made if necessary for altitude 3 The total heat loss from the structure as expressed in TOTAL BTU HR must be calculated by the manufacturers method or in accordance with the A S H R A E GUIDE or MANUAL J LOAD CALCULATIONS published by the AIR CONDITIONING CONTRACTORS OF AMERICA The total heat loss calculated should be equal to or less than the heating capacity Output based on D O E test procedures 4 Minimum Circuit Ampacity calculated as 1 25 x Circulator Blower Amps 1 0 Blower Amps Unit specifications are subject to change without notice ALWAYS refer to the units serial plate for the most up to date general and electrical information 11 BLOWER PERFORMANCE SPECIFICATIONS BLOWER PERFORMANCE CFM amp Temperature Rise vs External Static Pressure Model EXTERNAL STATIC PRESSURE Inches Water Column As Shipped reo se erus or se ore GMH950453BXA MED HI GMH950703BXA MED HI GMH950704CXA MED HI
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