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General| Model | 58DHC |
|---|---|
| Type | Gas Furnace |
| Efficiency Rating | 80% AFUE |
| Blower Motor | Multi-speed |
| Efficiency | 80% AFUE |
| Stages | Single-stage |
| Ignition System | Hot Surface Ignition |
| Heat Exchanger | Aluminized steel |
| Fuel Type | Natural Gas |
| Warranty | 20-year limited warranty on heat exchanger, 10-year parts limited warranty |
Describes the design and certification of the downflow/horizontal gas-fired furnace.
Specifies required clearances from combustible materials for different configurations.
Covers general installation cautions and critical safety warnings for furnace operation.
Details general placement, air requirements, and installation on combustible flooring.
Explains how to install the furnace with cooling coils to avoid condensation.
Provides guidelines for installing the furnace in garages or areas with hazardous atmospheres.
Covers combustion air contamination warnings and negative pressure issues.
Specifies air volume requirements for unconfined spaces.
Details air opening requirements for confined spaces based on inside or outside air.
Instructions for installing the plenum and furnace on a concrete slab.
Instructions for installing the plenum and furnace on a combustible floor.
Warns against installing the furnace on its back or improper return-air duct connections.
Details filter installation in the return-air plenum and required retainers.
Warns against operating the unit without a filter or with the door removed.
Provides guidelines for gas piping installation per codes and safety.
Details 115-volt wiring requirements, grounding, and wire type.
Covers warnings for aluminum wire use and electrical grounding.
Explains 24-volt connections, especially for cooling operation.
Details connections for electronic air cleaners and humidifiers.
Outlines general rules for venting the furnace according to codes.
Warns against bypassing the draft safeguard switch, which is critical for safety.
Provides tables for sizing dedicated vent systems based on height and elbows.
Provides tables for sizing common vent systems with a furnace and water heater.
Basic requirements for furnace startup, including power and thermostat connections.
Explains the furnace's operation sequence in heating, cooling, and continuous blower modes.
Details self-test, purging, lighting, and thermostat testing procedures.
Warns against using ignition sources to check for gas leaks.
Describes methods for adjusting the gas input rate.
Warns against redrilling burner orifices.
Warns to disconnect power before changing motor speed taps.
Details procedures for checking primary limit, draft safeguard, and flow sensing switches.
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