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General| Model | GMH81155CN Series |
|---|---|
| Fuel Type | Natural Gas |
| Configuration | Upflow/Horizontal |
| Ignition Type | Hot Surface Ignition |
| Gas Valve | Single Stage |
| Weight | 130 lbs |
Details the furnace's electronic ignition, induced draft blower, self-diagnosing control module, and heating capacity calculation.
Covers optimal furnace placement, clearances from combustibles, and specific requirements for garage installations.
Specifies minimum required clearances to combustible materials for servicing and general access.
Explains the necessity of high altitude orifice kits and derating for correct operation above 2000 feet.
Identifies key internal components of the furnace, referencing a diagram with numbered parts for upflow/horizontal configurations.
Lists pressure switch trip points and corresponding part numbers for square and round nose types across various models.
Provides part numbers and opening temperature settings for primary limit switches for different furnace models.
Details part numbers and open settings for rollout limit switches, listed by furnace model.
Lists part numbers and open settings for auxiliary limit switches, correlating with specific furnace models.
Describes compatible Goodman brand indoor coils for GDH8 furnaces using R22 and R-410A refrigerants.
Indicates that detailed thermostat information is available in separate specification sheets.
Outlines filter requirements, compliance standards, and the impact of missing filters on the unit warranty.
Details the furnace's provisions for return air filters at side/bottom, including sizes and flow areas.
Presents a table of minimum filter sizes and required area based on furnace input and filter type.
Explains the furnace's heating modes and how to adjust dipswitches for single-stage or modified two-stage operation.
Presents a typical schematic diagram for the GMH8 model furnaces with an integrated ignition control.
