Lennox G24-200 User Manual

Page 5
3 − DO NOT store chlorine or fluorine products near unit or
introduce these products into the combustion air.
These products can cause furnace corrosion.
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 turn the gas control knob.
Never use tools. If the knob will not push in or turn by
hand, do not try to repair it, call a qualified service techni
cian. Force or attempted repair may result in a fire or ex
plosion.
Lighting Information and Operation
1 − STOP! Read the safety information at the beginning
of this section.
2 − Set thermostat to the lowest setting. See figure 1.
3 − Turn off all electrical power to furnace.
4 − This furnace is equipped with two ignition devices
which automatically light the burners. Do not try to
light burners by hand.
5 − Remove control access panels.
THERMOSTATS
FIGURE 1
WHITE RODGERS 36E TWOSTAGE GAS VALVE
FIGURE 2
GAS VALVE KNOB SHOWN IN OFF" POSITION
LOW HEAT MANIFOLD
PRESSURE FACTORYSET,
NOT FIELDADJUSTABLE.
MANIFOLD
PRESSURE
TAP (SIDE)
HIGH FIRE
ADJUSTMENT
INLET
PRESSURE
TAP (SIDE)
6 − Perform the following to both gas valves: turn knob
on gas valve 180_ either way to OFF. Do not force.
7 − Wait five minutes to clear out any gas. If you then
smell gas, STOP! Immediately call your gas suppli
er from your neighbor’s phone. Follow the gas sup
plier’s instructions. If you don’t smell gas go to next
step.
8 − Perform the following to both gas valves: turn knob
on gas valve 180_ either way to ON position.
9 − Replace control access panels.
10 − Turn on electrical power to furnace.
11 − Set thermostat to desired setting.
12 − Both combustion air blowers will start. Burners in
both heat sections will light after a 30 second pre
purge.
13 − If furnace does not light first time (gas line not fully
purged) it will attempt up to two more ignitions be
fore locking out.
14 − If lockout occurs, repeat steps 1 through 10.
15 − If the furnace will not operate, follow the instructions
To Turn Off Gas To Unit" and call your service techni
cian or gas supplier.
B−To Turn Off Gas To Unit
1 − Set thermostat to lowest setting.
2 − Turn off all electrical power to furnace if service is to
be performed.
3 − Remove control access panels.
4 − Perform the following to both gas valves: White Rodg
ers 36E series valves: turn knob on gas valve 180_
either way to OFF. Do not force.
Service Reminder
Call your Lennox service technician if unit is inoperative.
Before calling, always check the following to be sure ser
vice is required.
1 − Check that electrical disconnect switches are ON.
2 − Check room thermostat for proper setting.
3 − Replace any blown fuses or reset circuit breakers.
4 − Gas valves should be ON.
5 − Air filters should not be plugged limiting air flow.
6 − Is gas turned on at meter?
7 − Is manual main shutoff valve open?
To keep your Lennox gas heating system in peak operat
ing condition year after year, contact your independent
Lennox dealer about a planned service program.

Lennox G24-200 Specifications

General

Brand	Lennox
Model	G24-200
Category	Furnace
Language	English