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General| Model Number | UH1B040A9241A |
|---|---|
| Category | Furnace |
| Type | Gas |
| Input BTU | 40, 000 |
| Blower Type | Multi-Speed |
| Stages | Single Stage |
| Gas Valve Type | Standard |
| Ignition Type | Hot Surface Ignition |
| Heat Exchanger Material | Aluminized Steel |
| Fuel Type | Natural Gas |
| Warranty | 5-Year Limited Warranty on Parts |
Explains the meaning of safety signal words used in the manual.
Details risks and steps to prevent carbon monoxide poisoning during operation.
Highlights dangers of fire or explosion due to improper installation or handling.
Warns about propane gas heavier than air and the need for detectors.
Emphasizes risks of improper gas pressure adjustment and leak checks.
Specifies requirements for furnace placement and necessary clearances around the unit.
Provides outline drawing and dimensional data for upflow/horizontal furnace models.
Provides outline drawing and dimensional data for downflow/horizontal furnace models.
Details requirements for adequate airflow for combustion and ventilation.
Explains how to connect supply and return air ductwork to the furnace.
Describes the installation and types of optional return air filters.
Covers specifications for plastic vent pipe material, fittings, and joint sealing.
Details the process for venting the furnace through exterior walls.
Explains how to properly vent the furnace through a roof opening.
Outlines the procedure for venting a furnace through the floor.
Instructions for connecting condensate drain tubing for upflow furnaces.
Instructions for configuring condensate drain for downflow furnaces.
Explains manifolding of drain pipes and requirements for preventing freeze-up.
Provides a wiring diagram for single-stage heating and cooling configurations.
Details wiring diagrams for connecting two furnaces in a twinning configuration.
Covers requirements for connecting the gas supply line to the furnace.
Outlines the procedure for checking combustion and input rates.
Explains how to adjust the gas valve manifold pressure for proper operation.
Guides on selecting replacement orifices based on altitude and input rate.
Provides instructions for safely lighting the furnace burner.
Details how to check and adjust safety controls like limit switches.
Describes how to check and adjust airflow by changing blower motor speed.
Lists common abnormal conditions and their potential causes/resolutions.
