G43UF Parts Identification
TOP CAP
UPPER ACCESS
PANEL
COMBUSTION AIR
PROVING
(PRESSURE)
SWITCH
INTEGRATED
CONTROL BOARD
BLOWER ACCESS
PANEL
DURALOKTM HEAT
EXCHANGER
ASSEMBLY
BURNERS
CABINET
GAS VALVE AND
MANIFOLD
FLUE
COLLAR
COMBUSTION AIR
INDUCER
BLOWER
MOTOR
CONTROL BOX
FIGURE 1
WARNING
Product contains fiberglass wool.
Disturbing the insulation in this product during installation, maintenance, or repair will expose you to fiberglass wool. Breathing this may cause lung cancer. (Fiberglass wool is known to the State of Cal- ifornia to cause cancer.)
Fiberglass wool may also cause respiratory, skin, and eye irritation.
To reduce exposure to this substance or for further information, consult material safety data sheets available from address shown below, or contact your supervisor.
Lennox Industries Inc.
P.O. Box 799900
Dallas, TX 75379−9900
NOTE − This manual must be left with the equipment user.
WARNING
Do not set thermostat below 60°F (16°C) in heating mode. Setting thermostat below 60°F (16°C) reduces the number of heating cycles. Damage to the unit may occur that is not covered by the warranty.
WARNING
If overheating occurs or if gas supply fails to shut off, shut off the manual gas valve to the furnace before shutting off electrical supply.
CAUTION
Before attempting to perform any service or mainte- nance, turn the electrical power to unit OFF at the disconnect switch.
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