Lennox G24M SERIES

Page 23
Unit Start-Up
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING
Do not use this furnace if any part has been underwaĆ
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 mainteĆ
nance, turn the electrical power to unit OFF at disĆ
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.
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 direct spark ignition
system. Do not
attempt to manually light burners on these
furnaces. Each time thermostat calls for heat, the burners
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 21 and 22)
1 - STOP! Read the safety information at the beginning of
this section.
2 - Set the thermostat to lowest setting.
3 - Turn off all electrical power to the unit.
4 - This furance 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 - Turn knob on gas valve
180° either way to OFF. See figure 21.
Honeywell VR8205 Gas Valve - Turn knob on gas valve
clockwise
to OFF. Do not force. See figure 22.
7 - Wait five (5) 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 instrucĆ
tions. 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
NO
OFF
FIGURE 21
ON
OFF
HONEYWELL VR8205 Series Gas Valve
GAS VALVE SHOWN IN OFF POSITION
MANIFOLD PRESSURE
ADJUSTMENT SCREW
MANIFOLD PRESSURE
OUTLET
FIGURE 22
8 - White Rodgers 36E Gas Valve - Turn knob on gas valve
180° either way 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 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 techniĆ
cian or gas supplier.