Lennox G23Q3/4-125

Page 21
FIGURE 23
GWYCR
SURELIGHT CONTROL
CONTROL
BOX
IGNITION
CONTROL
GAS
VALVE
FLAME
ROLL-OUT
SWITCH
LIMIT
BLACK
BROWN
TO COMPRESSOR
CONTACTOR
FIELD INSTALLED CLASS II 24V VOLTAGE
FIELD INSTALLED LINE VOLTAGE
TYPICAL G23(X) FIELD WIRING DIAGRAM
L1 N
FUSED DISCONNECT SWITCH
(FURNISHED BY INSTALLER)
TRANSFORMER
DOOR INTERLOCK
SWITCH
COMBUSTION
AIR BLOWER
COMBUSTION
AIR PROVE
SWITCH
FIELD
MAKE-UP
BOX
GND
J69
WHITE
TO ACCESSORY IF USED.
(ELECTRONIC AIR CLEANER)
IF NOT NEEDED, DO NOT INSTALL
ACCESSORY WIRE IN J69.
THERMO
STAT
GWRY
THERMOSTAT
Unit Start-Up
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.
CAUTION
Before attempting to perform any service or mainte
nance, turn the electrical power to unit OFF at dis
connect switch.
BEFORE LIGHTING smell all around the appliance area
for gas. Be sure to smell next to the floor because some
gas is heavier than air and will settle on the floor.
The G23(X) unit may be equipped with either a gas con
trol knob or gas control lever. Use only your hand to push
the lever or to turn the gas control knob. Never use tools. If
the knob will not turn or if the lever will not move by hand,
do not try to repair it, call a qualified service technician.
Force or attempted repair may result in a fire or explosion.
Placing the G23(X) furnace into operation:
G23(X) units are equipped with a SureLight ignition system.
Do not attempt to manually light burners on these furnaces.
Each time the thermostat calls for heat, the burners will au
tomatically light. The ignitor does not get hot when there is
no call for heat on units with SureLight ignition system.
WARNING
If you do not follow these instructions exactly, a fire
or explosion may result causing property damage,
personal injury or death.
Gas Valve Operation (Figures 25)
1 - STOP! Read the safety information at the beginning
of this section.
2 - Set thermostat to lowest setting. See figure 24.