Gas Heatstart-Up - Lennox LGH480 Installation Instructions Manual

Gas Heat Start-Up
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING
Electric shock hazard. Can cause injury
or death. Do not use this unit if any part
has been under water. Immediately call
a qualified service technician to inspect
the unit and to replace any part of the
control system and any gas control
which has been under water.
WARNING
Danger of explosion. Can cause injury or
death. Do not attempt to light manually.
Unit has a direct spark ignition system.
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.
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 technician.
Force or attempted repair may result in a fire or explosion.
WARNING
Electric shock hazard. Can cause
injury or death. Before attempting to
perform any service or maintenance,
turn the electrical power to unit OFF at
disconnect switch(es). Unit may have
multiple power supplies.
This unit is equipped with an automatic spark ignition system.
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.
A-Placing Unit In Operation
Gas Valve Operation for Honeywell VR8205Q /
VR8305Q and White Rodgers 36H54 (figure 33 and 34)
1- Set thermostat to lowest setting.
2- Turn off all electrical power to appliance.
WHITE RODGERS 36H54 GAS VALVE
INLET
PRESSURE
TAP
GAS VALVE SWITCH SHOWN IN ON POSITION.
HONEYWELL VR8205Q/VR8305Q GAS VALVE
HIGH FIRE
ADJUSTMENT
INLET
PRESSURE
TAP
GAS VALVE KNOB IS SHOWN IN OFF POSITION.
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 the heat section access panel.
Page 36
WARNING
Danger of explosion and fire. Can cause
injury or product or property damage.
You must follow these instructions
exactly.
Two-Stage
FIGURE 33
LOW FIRE
ADJUSTMENT
FIGURE 34
LGH/LCH420, 480, 540, 600
MANIFOLD
PRESSURE
TAP
HIGH FIRE
ADJUSTMENT
LOW FIRE
ADJUSTMENT
MANIFOLD
PRESSURE
TAP