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General| Efficiency Rating | High Efficiency |
|---|---|
| Model Series | 90RJ |
| Heating Capacity | 40, 000 - 120, 000 BTU |
| Fuel Type | Natural Gas or Propane |
| Stages | Single Stage |
| Warranty | 10-Year Parts Limited Warranty |
Crucial warnings about fire, explosion, injury, and death hazards.
Instructions for connecting supply and return air ducts for upflow furnace configurations.
Guidelines for duct connections for downflow and horizontal furnace installations.
General principles for venting and combustion air requirements for furnace installations.
Explanation of overtemperature safety switches and their function in furnace operation.
Guidance on how to handle existing vent systems when installing a new furnace.
Requirements for providing adequate combustion and ventilation air for non-direct vent furnace installations.
Specific guidelines for installing non-direct vent piping, including slope, support, and clearances.
General guidelines for installing direct vent systems, covering piping and termination requirements.
Specifications for standard vertical termination of direct vent systems.
Specifications for standard horizontal termination of direct vent systems.
Alternative methods for direct vent termination, especially for higher snow levels or longer runs.
Instructions for connecting combustion air and vent pipes to the upflow furnace.
Instructions for connecting combustion air and vent pipes to downflow/horizontal furnaces.
General information and precautions regarding condensate drainage and neutralizer installation.
Specifics on the condensate trap and drain routing for upflow furnace models.
Specifics on the condensate trap and drain routing for downflow furnace models.
Steps to convert the condensate drain system for horizontal furnace installation.
Important warnings and requirements regarding the gas supply and conversion to LP gas.
Guidelines for installing gas piping according to local codes and utility company requirements.
Procedure for installing LP gas orifices and ordering information based on altitude.
Alternative method for altitude derating in Canada using manifold pressure adjustments.
Guidelines for installing and wiring room thermostats compatible with the furnace control board.
Information on optional accessories like electronic air cleaners and humidifiers.
Instructions for twinning two furnaces, including control board connections and requirements.
Details on high altitude conversion kits and instructions for recalculating orifice sizes.
Information on furnaces factory-converted for high altitude, including pressure switches and orifices.
Alternative method for altitude derating in Canada using manifold pressure adjustments.
Step-by-step instructions for starting the furnace operation.
Procedures for safely shutting down the furnace operation.
Detailed explanation of the furnace's operational sequence, including ignition and safety controls.
Procedure to check and verify the furnace's temperature rise for proper air flow.
Instructions for cleaning and maintaining furnace filters for optimal performance.
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