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GMH8 39" 80% Gas Furnace
80% AFUE, 2-Stage (Convertible),
Multi-Speed, Upflow/Horizontal
•
Refer to Service Manual RS6610004 for installation, operation, and troubleshooting information.
•
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 ©2006
- 2009 Goodman Manufacturing Company, L.P.
TECHNICAL MANU
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TECHNICAL MANU
TECHNICAL MANU
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RT6621014 Rev. 2
June 2009
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Table of Contents
Related Manuals for Goodman GMH80903BN Series
Summarization of Contents
Product Design
General Operation
Explains the furnace's basic functions and components like electronic ignition and safety features.
Location Considerations
Details requirements for furnace placement and installation environment, including floor protection.
Product Design
Accessibility Clearances (Minimum)
Specifies minimum clearances for servicing and installation around the furnace unit.
High Altitude Derate
Explains altitude adjustments and orifice kit requirements for proper furnace operation.
Product Design
Pressure Switch Trip Points and Usage Chart
Details pressure switch settings and part numbers for various models.
Primary Limit Settings
Lists part numbers and open settings for primary limit controls.
Limit Switch Details
Provides details for rollout and auxiliary limit switches.
Product Design
Coil Matches
Shows how to match Goodman coils with furnace models using R22 and R-410A.
Product Design
Thermostats
Refers to separate specification sheets for thermostat lineup.
Filters
Specifies filter requirements, sizes, and compliance standards.
Product Design
Dual Saver Configuration & Operation
Details heating modes (Single Stage, Modified Two-Stage) and dipswitch settings.
Blower Performance Specifications
BTU Output vs Temperature Rise Chart
Provides a chart and formulas for calculating BTU output and temperature rise.
Schematics
Typical Schematic
Shows a schematic of the GMH8 model integrated ignition control.
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