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Need help?Do you have a question about the Lennox SL297UHNV Series and is the answer not in the manual?
Information regarding the service and maintenance of the unit.
Detailed technical specifications for the SL297UHNV series units.
List of optional accessories available for the furnace units.
Performance data for the blower motor at various settings.
Description of key unit components and their functions.
Overview of the integrated control system and its connections.
Guide for configuring the integrated control via DIP switches.
Table detailing diagnostic codes and required actions for recovery.
Explanation of the blower motor construction and internal operation.
Tests to diagnose issues with motor windings.
Description of major heating components like ignitor, sensor, and gas valve.
Procedures for checking the ignitor's resistance and voltage.
Details on the combustion air inducer and its pressure proving switch.
Steps for properly cementing pipe joints for venting.
Guidelines for safe and effective venting practices.
Guidelines for terminating intake and exhaust pipes for direct vent systems.
Information on condensate trap and piping installation.
Procedures for initial unit start-up and gas valve operation.
Checks for gas piping, supply pressure, and manifold pressure.
Flowchart for diagnosing ignition and resonance problems.
Information on blower operation, temperature rise, and static pressure.
General maintenance procedures for the unit.
Diagrams and explanations of unit wiring and operating sequences.
Explanation of the electronic ignition system and its features.
Heating sequence for units controlled by a two-stage thermostat.
Wiring diagrams for various thermostat applications.
Procedure for setting the unit's capacity size mode.
Flowchart for troubleshooting heating operation sequences.
Flowchart for troubleshooting continuous fan operation.
General
