Lennox LGM092U - Heating Start-Up and Safety Shutdown

Page 39
5- Turn the knob on the gas valve clockwise
to “OFF”.
Depress 36C knob slightly. Do not force.
6- Wait five (5) minutes to clear out any gas. If you then
smell gas, STOP! Immediately call your gas suppli
er from a neighbor's phone. Follow the gas supplier's
instructions. If you do not smell gas, go to the next step.
7- Turn the knob on the gas valve counterclockwise
to “ON”. Do not force.
8- Close or replace the heat section access panel.
9- Turn on all electrical power to appliance.
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 ignitions be
fore 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 Appliance
1- If using an electromechanical thermostat, set to the
lowest setting.
2- Before performing any service, turn off all electrical
power to the appliance.
3- Open or remove the heat section access panel.
4- Turn the knob on the gas valve clockwise
to “OFF”.
Depress 36C knob slightly. Do not force.
D-Safety or Emergency Shutdown
Turn off power to the unit. Close manual and main gas
valves.
FIGURE 29
LOW FIRE
ADJUSTMENT
HIGH FIRE
ADJUSTMENT
INLET
PRESSURE
TAP
OUTLET
PRESSURE
TAP
HONEYWELL VR8305/VR8205 GAS VALVE
GAS VALVE SHOWN IN
“OFF” POSITION
WHITE-RODGERS 36C76 GAS VALVE
D-1
GV-1
C-1
C2
GV-2
OUTLET
PRESSURE
TAP (SIDE)
STAGE 2 MANUAL MANIFOLD
PRESSURE ADJUSTMENT
SCREW UNDER CAP
INLET
PRESSURE
TAP (SIDE)
GAS VALVE
SHOWN IN “OFF”
POSITION