Unit Operation; For Your Safety Read Before Lighting; Adjustment Screw - Lennox LGH036 User's Information Manual

CAUTION
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after
servicing.
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.
WARNING
Do not use this furnace if any part has been under water.
A flood-damaged furnace is extremely dangerous.
Attempts to use the furnace can result in fire or explosion.
A qualified service agency should be contacted to
inspect the furnace and to replace all gas controls,
control system parts, electrical parts that have been wet
or the furnace if deemed necessary.
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.

Unit Operation

FOR YOUR SAFETY READ BEFORE LIGHTING

BEFORE LIGHTING smell all around the furnace area for
gas. Be sure to smell next to the roof because some gas
is heavier than air and will settle on the roof.
The gas valve may be equipped with either a gas control
lever or gas control knob. Use only your hand to push the
lever or turn the gas control knob. Never use tools. If the
the lever will not move or 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.
507246-02 7/2018
The 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. For logic units and units with electronic tempera-
ture controls, shut off the main disconnect and then turn it
on to reset the ignition control.
Placing Unit Into Operation
Danger of explosion and fire. Can cause
injury or product or property damage. You
must follow these instructions exactly.
Gas Valve Operation
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 the heat section access panel.
5 - Turn gas valve switch to OFF. See Figure 1, Figure
2, or Figure 3. On Honeywell VR8305Q gas valves,
turn knob on gas valve clockwise
not force. See Figure 4.
6 - 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 instructions. If you do not smell gas, go
to the next step.
HONEYWELL VR8215S GAS VALVE
MANIFOLD
PRESSURE
ADJUSTMENT
SCREW
INLET
PRESSURE
PORT
GAS VALVE SWITCH SHOWN IN ON POSITION.
Page 4
WARNING
Single-Stage
FIGURE 1
to OFF. Do
MANIFOLD
PRESSURE
OUTLET