Amana AMH8 Operations Instructions Page 6
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PRODUCT IDENTIFICATION
6
MODEL # MFG.# DESCRIPTION
GMH8**CA
GMH80453A*
GMH80703A*
GMH80704B*
GMH80903B*
GMH80904C*
GMH80905C*
GMH81155C*
GMH81405D*
Goodman® Brand 80% Modified Two-Stage Gas Furnace
, Upflow/Horizontal Left and Right
installation, 33 3/8" tall, Induced draft, Two stage gas Valve, Integrated circuit board
controlling 2nd stage gas valve by time. Left or right side gas entry. Aluminized steel heat
exchanger. PSC blower motor. 115 volt silicon nitride igniter. "X" models are low NOx.
Chassis sizes are 14", 17.5" 21, and 24.5" wide.
GMH8***CB
GMH80453A*
GMH80703A*
GMH80704B*
GMH80903B*
GMH80904C*
GMH80905C*
GMH81155C*
GMH81405D*
Goodman® Brand 80% Modified Two-Stage Gas Furnace
, Upflow/Horizontal Left and Right
installation, 33 3/8" tall, Induced draft, Two stage gas Valve, Integrated circuit board
controlling 2nd stage gas valve by time. Left or right side gas entry. Aluminized steel heat
exchanger. PSC blower motor. 115 volt silicon nitride igniter. "X" models are low NOx.
Chassis sizes are 14", 17.5" 21, and 24.5" wide. CB revision changed to a rotatable inducer
(clockwise)
GMH8***CC
GMH80453A*
GMH80703A*
GMH80704B*
GMH80903B*
GMH80904C*
GMH80905C*
GMH81155C*
GMH81405D*
Goodman® Brand 80% Modified Two-Stage Gas Furnace
, Upflow/Horizontal Left and Right
installation, 33 3/8" tall, Induced draft, Two stage gas Valve, Integrated circuit board
controlling 2nd stage gas valve by time. Left or right side gas entry. Aluminized steel heat
exchanger. PSC blower motor. 115 volt silicon nitride igniter. "X" models are low NOx.
Chassis sizes are 14", 17.5" 21, and 24.5" wide. CC revision changed to a Honeywell gas
valve
GMH8***CD GMH81405D*
Goodman®Brand 80% Modified Two-Stage Gas Furnace
. Upflow/Horizontal Left and right
installation, 33 3/8" tall, Induced draft, Two stage gas Valve, Integrated circuit board
controlling 2nd stage gas valve by time. Left or right side gas entry. Aluminized steel heat
exchanger. PSC blower motor. 115 volt silicon nitride igniter. Chassis size 24.5" wide. "CD"
revision has a standard rated altittude of 5,500 ft.
GMH8***AA
GMH80403A*
GMH80603A*
GMH80604B*
GMH80803B*
GMH80804C*
GMH80805C*
GMH81005C*
GMH81205D*
Goodman® Brand 80% Modified Two-Stage Gas Furnace
, New model nomenclature, fired
at 23,000 BTUH per burner. Upflow/Horizontal Left and Right installation, 33 3/8" tall,
Induced draft, Two stage gas Valve, Integrated circuit board controlling 2nd stage gas valve
by time. Left or right side gas entry. Alulinized steel heat exchanger. PSC blower motor. 115
volt silicon nitride igniter. "X" models are low NOx. Chassis sizes are 14", 17.5" 21, and
24.5" wide.
GMH8***BA
GMH80403A*
GMH80603A*
GMH80604B*
GMH80803B*
GMH80804C*
GMH80805C*
GMH81005C*
GMH81205D*
Goodman® Brand 80% Modified Two-Stage Gas Furnace
, fired at 20,000 BTUH per
burner. Upflow/Horizontal Left and Right installation, 33 3/8" tall, Induced draft, Two stage
gas Valve, Integrated circuit board controlling 2nd stage gas valve by time. Left or right side
gas entry. Aluminized steel heat exchanger. PSC blower motor. 115 volt silicon nitride
igniter. "X" models are low NOx. Chassis sizes are 14", 17.5" 21, and 24.5" wide. "BA"
revisions have a standard rated altitude of 4,500 ft
GMH8***BB
GMH80403A*
GMH80603A*
GMH80604B*
GMH80803B*
GMH80804C*
GMH80805C*
GMH81005C*
Goodman® Brand 80% Modified Two-Stage Gas Furnace
, fired at 20,000 BTUH per
burner. Upflow/Horizontal Left and Right installation, 33 3/8" tall, Induced draft, Two stage
gas Valve, Integrated circuit board controlling 2nd stage gas valve by time. Left or right side
gas entry. Aluminized steel heat exchanger. PSC blower motor. 115 volt silicon nitride
igniter. "X" models are low NOx. Chassis sizes are 14", 17.5" 21, and 24.5" wide. "BB"
revisions and GMH81205D*BA have a standard rated altitude of 5,500 ft
- Service Instructions 1
- TABLE OF CONTENTS 2
- IMPORTANT INFORMATION 2
- PRODUCT IDENTIFICATION 10
- ACCESSORIES 11
- ( EFR01 ) 13
- ACCESSORY WIRING DIAGRAMS 14
- FOR YOUR SAFETY 16
- OPERATING INSTRUCTIONS 17
- VEHICLE 19
- WHEN INSTALLING THE UNIT 20
- EXISTING FURNACE REMOVAL 21
- PRODUCT DESIGN 24
- CATEGORY III VENTING 25
- POWER UP 36
- HEATING MODE 36
- COOLING MODE 37
- FAN ONLY MODE 37
- SYSTEM OPERATION 39
- TROUBLESHOOTING 40
- TROUBLESHOOTING CHART 40
- A/GMH8, GDH8, ADSH8 40
- POLARIZATION AND PHASING 42
- MAINTENANCE 43
- SERVICING 46
- S-15A Resistance Check 51
- TOR (PSC) 51
- S-200 CHECKING DUCT STATIC 51
- HIGH VOLTAGE 55
- ALL POWER BEFORE SERVICING OR 55
- MULTIPLE POWER SOURCES MAY 55
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