Lennox G21Q Series User's Information Manual page 2

G21 (Q & V) Series Parts Arrangement
LIMIT
CONTROL
DIFFERENTIAL
PRESSURE
SWITCH
AIR INTAKE
CONNECTION
AIR VALVE
AND
AIR HOUSING
LOW VOLTAGE
TERMINAL
STRIP
BLOWER
For Your Safety, Read Before Lighting
WARNING
Do not use this furnace if any part has been under
water. Immediately call a qualified service techni
cian to inspect the furnace and to replace any part
of the control system and any gas control which
has been under water.
WARNING
If overheating occurs or if gas supply fails to shut
off, shut off the manual gas valve to the appliance
before shutting off electrical supply.
G21Q SERIES
BLOWER MOTOR
DOOR
INTERLOCK SWITCH
FIGURE 1
Before attempting to perform any service or mainte
nance, turn the electrical power to unit OFF at dis
connect switch.
Do not set the thermostat below 60_F (16_C) when
it is in heating mode. Setting the 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.
BEFORE LIGHTING smell all around the appliance
area for gas. Be sure to smell next to the floor be
cause some gas is heavier than air and will settle on
the floor.
Page 1
GAS VALVE
EXPANSION
TANK
CONTROL
BOX
G21V SERIES
BLOWER MOTOR
CAUTION
WARNING