Goodman GMH95 Technical Manual
Gmh95 series 40" 95% gas furnace
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Also See for GMH95:
- Installation instructions manual (52 pages) ,
- Technical manual (17 pages) ,
- Product specifications (13 pages)
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Table of Contents
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Refer to Service Manual RS6610004 for installation, operation, and troubleshooting information.
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All safety information must be followed as provided in the Service Manual.
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Refer to the appropriate Parts Catalog for part number information.
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Model numbers listed on page 3.
This manual is to be used by qualified, professionally trained HVAC technicians only.
Goodman does not assume any responsibility for property damage or personal
injury due to improper service procedures or services performed by an unqualified
person.
Copyright © 2007,
2009-2010
TECHNICAL MANU
TECHNICAL MANU
TECHNICAL MANU AL
TECHNICAL MANU
TECHNICAL MANU
GMH95
40" 95% Gas Furnace
Goodman Manufacturing Company, L.P.
AL
AL
AL
AL
®
C
US
RT6612018 Rev. 5
April 2010
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Table of Contents
Related Manuals for Goodman GMH95
Summary of Contents for Goodman GMH95
- Page 1 Goodman does not assume any responsibility for property damage or personal injury due to improper service procedures or services performed by an unqualified person. Copyright © 2007, 2009-2010 Goodman Manufacturing Company, L.P. TECHNICAL MANU TECHNICAL MANU TECHNICAL MANU AL TECHNICAL MANU TECHNICAL MANU GMH95 ® RT6612018 Rev. 5 April 2010...
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Page 2: Product Identification
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. Brand: G: Goodman Air Flow Direction M:Upflow/Horizontal D: Dedicated Downflow C: Downflow/Horizontal H: Hi Air Flow Description H: Dual$aver, Multi Speed... - Page 3 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. The United States Environmental Protection Agency (“EPA”) has issued various regulations re- WARNING WARNING garding the introduction and disposal of refrigerants introduced into this unit.
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Page 4: Product Design
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. -
Page 5: Component Identification
COMPONENT IDENTIFICATION 1 Gas Valve 2 Gas Line Entrance (Alternate) 3 Pressure Switch 4 Gas Manifold 5 Combustion Air Intake Connection / “Coupling” 6 Hot Surface Igniter 7 Rollout Limit 8 Burners 9 Flame Sensor 10 Flue Pipe Connection / “Coupling” 11 Flue Pipe (Internal) 12 Primary Limit 13 Gas Line Entrance... - Page 6 GMH950904CXA* GMH950905DXA* GMH951155DXA* All dimensions are in inches. Note: Airflow area will be reduced by approximately 18% if duct flanges are not unfolded. This could cause performance issues and noise issues. GMH95*****XA* INTAKE PIPE 2" PVC UNFOLDED FLANGES FOLDED FLANGES...
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Page 7: Primary Limit
PRODUCT DESIGN NEGATIVE NEGATIVE PRESSURE PRESSURE ID BLOWER ID BLOWER COIL COVER WITH FLUE WITH FLUE NOT FIRING FIRING NOT FIRING MODEL TYPICAL TYPICAL LEVEL LEVE DATA DATA GMH950453BXA* -1.30 -1.10 GMH950703BXA* -1.10 -0.95 GMH950704CXA* -1.30 -1.10 GMH950904CXA* -1.40 -1.20 GMH950905DXA* -1.30 -1.10... -
Page 8: Rollout Limit Sw Itches
PRODUCT DESIGN Part Number Open Setting (°F) GMH950453BXA* GMH950703BXA* GMH950704CXA* GMH950904CXA* GMH950905DXA* GMH951155DXA* ROLLOUT LIMIT SW ITCHES 10123514 or 10123533 AUXILIARY LIMIT SWITCHES Part Number 10123535 Open Setting (°F) GMH950453BXA* GMH950703BXA* GMH950704CXA* GMH950904CXA* GMH950905DXA* GMH951155DXA* 10123519... - Page 9 A large array of Amana 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).
- Page 10 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/ULCS111 standards. Installing this furnace without filters will void the unit warranty.
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Page 11: Furnace Specifications
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. -
Page 12: Blower Performance Specifications
(MED-HI) MED-LO 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 & heating speed as needed. - Page 13 BLOWER PERFORMANCE SPECIFICATIONS RISE TEMPERATURE...
- Page 14 NOTE 6 Wiring is subject to change, always refer to the wiring diagram on the unit for the most up-to-date wiring. GMH95[0453,0704,0905]*XAB GMH95[0703,0904,1155]*XAC 6. TO RECALL THE LAST 5 FAULTS, MOST RECENT TO LEAST RECENT, DEPRESS SWITCH FOR MORE THAN 2 SECONDS WHILE IN...
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Page 15: Wiring Diagrams
2. MANUFACTURER'S SPECIFIED REPLACEMENT PARTS MUST BE USED WHEN SERVICING. 3. IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE FURNACE MUST BE REPLACED, IT MUST BE REPLACED WITH WIRING MATERIAL HAVING A TEMPERATURE RATING OF AT LEAST 105 C.