Brand: Lennox
Category: Home HVAC System
Manual Type:
Language:
Manual for L85UF, L85BF, L85BR
Uploaded: April 1, 2025, 12:48 a.m.
Warranty Summary
No warranty information is provided in this manual.
Heating: When the thermostat calls for heat, the burner motor activates. After a pre-purge, power is sent to the burner and ignition starts. Once the burner pump reaches full speed, a solenoid valve opens. When the thermostat is satisfied, the solenoid valve de-energizes before the pump stops, and power to the burner is cut off.
Cooling (Single Stage): On a cooling call, the blower starts at 82% speed for dehumidification, then ramps up to 100% after 7.5 minutes. When satisfied, the blower ramps down to 82% for a minute, then shuts off.
Cooling (Two Stage): In 1st stage cooling, the blower runs at 57% then 70% speed. For 2nd stage, it ramps to 100%. When satisfied, it steps down through 1st stage speeds before shutting off.
Continuous Fan: When enabled, the blower runs at 50% of cooling CFM for constant air circulation.