Unit Start--Up - Lennox G21Q Series Installation Instructions Manual

81,7 67$5783
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 main-
tenance, turn the electrical power to unit OFF at
disconnect 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.
Use only your hand to push in or move the gas control
lever or switch. Never use tools. If the lever or switch
will not push in or 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.
Gas Valve Operation
WARNING
If you do not follow these instructions exactly, a
fire or explosion may result causing property dam-
age, personal injury or loss of life.
This unit is equipped with an automatic spark ignition
system with flame rectification. Once combustion has
started, the purge blower and spark ignitor are turned
not
off. Do try to light by hand.
Gas Valve Operation for Robertshaw and White
Rodgers Valves (Figure 22)
1 - - Set the thermostat to the lowest setting.
2 - - Turn off all electrical power to the unit.
ROBERTSHAW 7200 GAS VALVE
GAS VALVE
SELECTOR ARM
IN OFF
POSITION
WHITE RODGERS
36E GAS VALVE
GAS VALVE
SHOWN
IN OFF
POSITION
3 - - This appliance Is equipped with an ignition device
which automatically lights the burner. Do
light the burner by hand.
4 - - Remove the unit access panel.
5 - - On Robertshaw 7200 gas valve, push lever on gas
control and move to
Rodgers 36E gas valves, move switch to
not force.
6 - - Wait five minutes to clear out any gas. Smell for
gas, including near the floor. If you then smell gas,
STOP!
Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s in-
structions. If you do not smell gas go to next step.
7 - - On Robertshaw 7200 gas valve, push lever on gas
control and move to
Rodgers 36E gas valves, move switch to
8 - - Replace the unit access panel.
9 - - Turn on all electrical power to unit.
10- - Set the thermostat to the desired setting.
11- - If the furnace will not operate, follow the instruc-
tions “Turning Off Gas To Unit” and call your ser-
vice technician or gas supplier.
Turning Off Gas To Unit
1 - - Set the thermostat to the lowest setting.
2 - - Turn off all electrical power to the unit if service is to
be performed.
3 - - Remove the heat section access panel.
4 - - On Robertshaw 7200 gas valve, push lever on gas
control and move to
Rodgers 36E gas valves, move switch to
not force.
5 - - Replace the unit access panel.
3DJH 
FIGURE 22
OFF
and release. For White
ON
, then release. For White
OFF,
then release. For White
not
try to
OFF
. Do
ON
.
OFF
. Do