Page 24
Unit Start-Up
WARNING
Do not use this furnace if any part has been underwa
ter. Immediately call a qualified service technician 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.
FOR YOUR SAFETY READ BEFORE LIGHTING
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 turn the gas control knob. Never use
tools. If the knob will not turn 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 Furnace Into Operation
G24M furnaces 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 burn
ers will automatically light.
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 23 and 24)
1 -
STOP
! Read the safety information at the beginning of
this section.
2 - Set the thermostat to the lowest setting.
3 - Turn off all electrical power to the unit.
4 - This furnace is equipped with an ignition device which
automatically lights the burners. Do
not
try to light the
burners by hand.
5 - Remove the access panel.
6 -
White Rodgers 36E Gas Valve -
Switch gas valve le
ver to
OFF
. See figure 23.
Honeywell VR8205 Gas Valve -
Turn knob on gas
valve clockwise
to
OFF
. Do not force. See figure
24.
7 - Wait five minutes to clear out any gas. If you then smell
gas,
STOP
! Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's instructions.
If you do not smell gas go to next step.
WHITE RODGERS 36E Series Gas Valve
GAS VALVE SHOWN IN OFF POSITION
MANIFOLD
PRESSURE
ADJUSTMENT
SCREW
MANIFOLD
PRESSURE
OUTLET
FIGURE 23
ON
OFF
HONEYWELL VR8205 Series Gas Valve
GAS VALVE SHOWN IN OFF POSITION
MANIFOLD
PRESSURE
ADJUSTMENT
SCREW
MANIFOLD
PRESSURE
OUTLET
FIGURE 24
8 -
White Rodgers 36E Gas Valve -
Switch gas valve lever
to
ON
.
Honeywell VR8205 Gas Valve -
Turn knob on gas valve
counterclockwise
to
ON
. Do not force.
9 - Replace the access panel.
10 - Turn on all electrical power to the unit.
11 - Set the thermostat to desired setting.
NOTE – When unit is initially started, steps 1 through 11
may need to be repeated to purge air from gas line.
12 - If the appliance will not operate, follow the instructions
Turning Off Gas to Unit" and call your service techni
cian 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 access panel.
4 -
White Rodgers 36E Gas Valve -
Switch gas valve le
ver to
OFF
.
Honeywell VR8205 Gas Valve -
Turn knob on gas
valve clockwise
to
OFF
. Do not force.
5 - Replace the access panel.
