Goodman GCH9 Technical Manual
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Goodman GCH9 Technical Manual

40" 95% gas furnace
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See also: Instruction and Installation Manual
•
Refer to 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.
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 Goodman
TECHNICAL MANU
TECHNICAL MANU
TECHNICAL MANU
TECHNICAL MANU AL
TECHNICAL MANU
GCH9
40" 95% Gas Furnace
Manufacturing Company, L.P.
AL
AL
AL
AL
®
C
US
RT6612019 Rev. 2
April 2010

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Summary of Contents for Goodman GCH9

  • Page 1 TECHNICAL MANU TECHNICAL MANU TECHNICAL MANU TECHNICAL MANU AL TECHNICAL MANU GCH9 40" 95% Gas Furnace • Refer to Service Manual RS6610004 for installation, operation, and troubleshooting information. • All safety information must be followed as provided in the Service Manual. •...

  • 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: Minior G: Goodman Revision A: Revision Air Flow Direction M:Upflow/Horizontal D: Dedicated Downflow Major Revision C: Downflow/Horizontal A: Initial Release...
  • 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. GCH90453BXA* GCH90703BXA* GCH90704CXA* GCH90904CXA* GCH90905DXA* GCH91155DXA* These models are Low NOx. 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.

  • Page 4: Product Design

    PRODUCT DESIGN 3. Conversion kits for high altitude natural or propane gas General Operation operation are available. See High Altitude Derate chart The GCH9 furnaces are equipped with an electronic ignition for details. device used to light the burners and an induced draft blower 4.

  • Page 5: Component Identification

    COMPONENT IDENTIFICATION Downflow /Horizontal 1 Two-Stage Gas Valve 19 Coil Front Cover Drain Port 2 Gas Line Entrance (Alternate) 20 Drain Line Penetrations 3 Pressure Switch(es) 21 Drain Trap 4 Gas Manifold 22 Blower Door Interlock Switch 5 Combustion Air Intake Connection 23 Capicitor 6 Hot Surface Igniter 24 Integrated Control Module...
  • Page 6 COMPONENT IDENTIFICATION GCH9*****XA* LEFT SIDE FRONTVIEW RIGHT SIDE VIEW VIEW 28 3/4 2 1/2 VENT/FLUE PIPE 20 1/4 (RETURN) AIR INTAKE PIPE 2" PVC 2" PVC 2 1/16 CONDENSATE LOW VOLTAGE DRAIN TRAP 1 3/4 ELECTRICAL HOLE w/ 3/4" PVC 1 3/4 DISCHARGE LOW VOLTAGE...

  • Page 7: Primary Limit

    PRODUCT DESIGN PRESSURE SWITCH TRIP POINTS AND USAGE CHART 0 to 7,000 ft. ID BLOWER TRIP POINT TRIP POINT MODEL PRESSURE PRESSURE COIL COVER ID BLOWER SWITCH SWITCH PRESSURE SWITCH PRESSURE SWITCH PART # PART # -.60 20197311 -.60 20197311 GCH90453BX -.60 20197311...

  • Page 8: Rollout Limit Switches

    PRODUCT DESIGN ROLLOUT LIMIT SWITCHES Part Number 10123517 10123534 Open Setting (°F) GCH90453BX GCH90703BX GCH90704CX GCH90904CX GCH90905DX GCH91155DX AUXILIARY LIMIT SWITCHES Part Number 10123518 10123519 Open Setting (°F) GCH90453BX GCH90703BX GCH90704CX GCH90904CX GCH90905DX GCH91155DX...
  • Page 9 PRODUCT DESIGN Coil Matches: A large array of Amana ® brand coils are available for use with the GCH9 furnaces, in either counterflow or horizontal applications. These coils are available in both cased and uncased models (with the option of a field installed TXV expansion ®...
  • Page 10 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/ULCS111 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.
  • Page 11 PRODUCT DESIGN Dual $aver Configuration & Operation Dual $aver This furnace is capable fo the following heating modes: • Single Stage (Factory Setting) • Modified Two-Stage > Fixed 5-Min. Low Stage > Auto Time (1-12 Min.) Low Stage To change from the factory single-stage operation, adjust the dipswitches on the ignition control as follows: Mode Mode Dipswitch...

  • Page 12: Furnace Specifications

    FURNACE SPECIFICATIONS GCH9 MODEL GCH90453BX GCH90703BX GCH90704BX GCH90904CX GCH90905CX GCH91155DX Btuh Input (US) 46,000 69,000 69,000 92,000 92,000 115,000 Output (US) 42,800 64,400 64,400 86,000 86,000 106,500 BTUH Output (US) LP 38,502 57,753 57,753 77,004 77,004 96,255 A.F.U.E. Rated External Static (" w.c.) .20"...

  • Page 13: Blower Performance Specifications

    BLOWER PERFORMANCE SPECIFICATIONS BLOWER PERFORMANCE (CFM & Temperature Rise vs. External Static Pressure) EXTERNAL STATIC PRESSURE (Inches Water Column) Tons AC Model Motor at 0.5" Heating Speed Speed As Shipped CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE CFM CFM CFM HIGH 1352 1318...
  • Page 14 BLOWER PERFORMANCE SPECIFICATIONS RISE TEMPERATURE...
  • Page 15 WIRING DIAGRAMS GCH9*****X[AA,AB] STAGE DELAY MODE HEAT DELAY NOTE 6 COOL-H 6. TO RECALL THE LAST 5 FAULTS, MOST RECEN T TO LEAST RECENT, DEPRESS SWITCH FOR MORE THAN 2 SECONDS WHILE IN 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.

  • Page 16: Wiring Diagrams

    WIRING DIAGRAMS GCH9*****XAC BLOWER INTEGRATED HUMIDIFIER 24 VAC COMPARTMENT CONTROL MODULE HUMIDIFIER DOOR SWITCH (OPEN WHEN TR (6) 24 VAC DOOR OPEN) GND (8) 40 VA VALVE MVC (9) TRANSFORMER 115 VAC MVH (12) 24V THERMOSTAT AUXILIARY LIMIT CONTROLS CONNECTIONS MVL(2) FRONT COVER PS (10)

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