UPFLOW FURNACE SIDE RETURN AIR
Burner Flame
The 80MGF burner flame is not adjustable; however, the flame should be inspected at the beginning of each heating season and burners should be cleaned, if necessary. Burner flame should be blue when burn9 ing natural gas, blue/yellow when burning propane gas.
BURNER FLAME
FIGURE 5
FLAME APPEARS BLUE IF BURNING NAT. GAS; BLUE/ YELLOW FOR PROPANE.
BURNER
FLAME
HEAT
EXCHANGER
TUBE
VEST
PANEL
DOWNFLOW FURNACE
FILTERS IN PLENUM RACK
FIGURE 6
Blower
Check and clean blower wheel for any debris. Blower motor is prelubricated for extended bearing life. No further lubrication is needed.
WARNING
Blower door must be securely in place when blower and burners are operating. Gas fumes, which could contain carbon monoxide, can be drawn into living space resulting in personal injury or death.
FIGURE 7
Venting System Inspection
Annually (before heating season) inspect furnace venting system, vent cap, heat exchanger and burn9 ers for corrosion, deterioration, or deposits of debris. Remove any obstructions.
Contact your Lennox dealer for a periodic unit inspec9 tion by a qualified service technician.
Flame Rollout Safety Switches
Your Lennox furnace is equipped with two flame roll- out safety switches which shut off the gas supply to the furnace in case of heat exchanger blockage. If the furnace fails to operate due to the functioning of these safety switches, DO NOT attempt to place the furnace into operation. Contact a qualified service technician.
Service Reminder
Call your Lennox service technician if unit is inopera9 tive. Before calling, always check the following to be sure service is required.
1 - Check that electrical disconnect switches are ON.
2 - Are access panels securely in place?
3 - Check room thermostat for proper setting.
4 - Replace any blown fuses or reset circuit breakers. 5 - Gas valve should be ON.
6 - Air filter should not be plugged limiting air flow.
7 - Is gas turned on at meter?
8 - Is manual main shut&off valve open?
To keep your Lennox gas heating system in peak operat9 ing condition year after year, contact your independent Lennox dealer about a planned service program.
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