Safety Or Emergency Shutdown - Lennox LGA Series Unit Information

WARNING
Danger of explosion. Can cause injury
or product or property damage. 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.
WARNING
SMOKE POTENTIAL
The heat exchanger in this unit could be a source of
smoke on initial firing. Take precautions with respect
to building occupants and property. Vent initial sup-
ply air outside when possible.
WARNING
Danger of explosion. Can cause injury or
death. Do not attempt to light manually.
Unit has a direct spark ignition system.
This unit is equipped with an automatic spark ignition sys-
tem. There is no pilot. In case of a safety shutdown, move
thermostat switch to OFF and return the thermostat switch
to HEAT to reset ignition control.
WARNING
Danger of explosion and fire. Can cause
injury or product or property damage.
You must follow these instructions
exactly.
Placing Unit In Operation
Gas Valve Operation for White Rodgers 36C Se-
ries Valve (Figure 31) and Honeywell VR8305Q (Figure
32) Series Gas Valve
WHITE RODGERS 36C GAS VALVE
INLET
PRESSURE
TAP
GAS
VALVE KNOB
SHOWN IN ON"
POSITION
FIGURE 31
HONEYWELL VR8305Q SERIES GAS VALVE
HIGH FIRE
ADJUSTMENT
INLET
PRESSURE
TAP
Gas valve knob is shown in OFF position.
1− Set thermostat to lowest setting.
2− Turn off all electrical power to appliance.
3− This appliance is equipped with an ignition device
which automatically lights the burner. Do not try to light
the burner by hand.
4− Open or remove the heat section access panel.
5− Turn the knob on the gas valve clockwise
Do not force.
6− 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 instruc-
tions. If you do not smell gas, go to the next step.
7− Turn the knob on the gas valve counterclockwise
ON. Do not force.
8− Close or replace the heat section access panel.
9− Turn on all electrical power to unit.
10− Set thermostat to desired setting.
11− The combustion air inducer will start. The burners will
light within 40 seconds.
12− If the appliance does not light the first time (gas line
not fully purged), it will attempt up to two more igni-
tions before locking out.
13− If lockout occurs, repeat steps 1 through 10.
14− If the appliance will not operate, follow the instructions
Turning Off Gas to Appliance" and call your service
technician or gas supplier.
Turning Off Gas to Unit
1− If using an electromechanical thermostat, set to the
lowest setting.
2− Before performing any service, turn off all electrical
power to the unit.
3− Open or remove the heat section access panel.
4− Turn the knob on the gas valve clockwise
Do not force.
5− Close or replace the heat section access panel.
F−Safety or Emergency Shutdown
Turn off power to unit.
Page 56
LOW FIRE
ADJUSTMENT
FIGURE 32
to OFF.
to
to OFF.