Operating Your Furnace; Lighting The Pilot - Williams 1403821 Owner's Manual

Operating Your Furnace

The furnace operates in the following sequence:
1. The thermostat turns on the main burner.
2. Heat builds up in the furnace and starts the fan (if
equipped). The heated air comes out the panel louvers.
3. When the thermostat setting is reached, it shuts off the
main burner.
4. The fan runs until the heat is removed from the furnace,
then it turns off.
Your furnace is equipped with a built-in pressure regulator. L.P.
gas models also have a regulator at the supply tank. If you
have a question regarding the amount of fuel consumed, call
your local gas utility or gas supplier.
WARNING: DO NOT TAMPER WITH THE
REGULATOR OR BURNER ORIFICES, AS
PROBLEMS RESULTING FROM THERE MAY
CAUSE PRODUCT FAILURE NOT COVERED
BY WARRANTY.

Lighting the Pilot

FOR YOUR SAFETY, READ BEFORE LIGHTING
This furnace is equipped with a manually operated piezo spark
ignition device to ignite the pilot gas. Follow the steps below
and use the manual spark igniter to light the pilot in place of a
match. Press spark igniter button repeatedly and vigorously. If
the spark igniter fails to provide spark to light the pilot, loosen
the wing nut holding the pilot cover. This opens to the
combustion chamber. The pilot may be ignited with a match.
1. Follow the instructions below and use a match to light the
pilot as instructed.
2. After lighting the pilot, carefully replace the pilot observation
door and tighten wing nut down.
On new installations, the gas lines will be filled with air and it
may take several tries to establish the pilot flame. Check the
manual shutoff valve in the gas line. It must be in the open
position (handle parallel to the gas line) before you can light
your furnace. Your furnace is equipped with a 100% safety
pilot, which will shut off the gas valve in case the pilot is not
burning or functioning properly. Make sure the pilot is adjusted
properly and that the generator connection at the control valve
is tight. If furnace will not stay lit, call your local gas utility
company.
If you
WARNING:
instructions exactly, a fire or explosion may result
causing property damage, personal injury or loss
of life.
A. This appliance has a pilot which must be lit by hand. When
lighting the pilot, follow these instructions exactly.
B. BEFORE LIGHTING smell around the appliance area for
gas. Be sure to smell next to the floor because some gases are
heavier than air and will settle on the floor.
14
do not follow these
Input and output ratings shown on the rating plate, located in
burner compartment, must not be exceeded.
KEEP
IMPORTANT:
COMPARTMENT CLEAN.
WARNING: Do not store or use gasoline or other
flammable liquids or vapors near the furnace.
WARNING: Danger of bodily injury or death. Do
not operate the furnace with a broken or missing
pilot observation door.
C. 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.
D. Do not use this appliance if any part has been under water.
Immediately call a qualified service technician to inspect the
appliance and to replace any part of the control system and
any gas control which has been under water.
WHAT TO DO IF YOU SMELL GAS
 Do not try to light any appliance.
 Do not touch any electric switch. Do not use any telephone
or cell phone in your building.
 Immediately call your gas supplier from a neighbour's
phone. Follow the gas supplier's instructions.
 If you cannot reach your gas supplier call the fire
department.
IMPORTANT: KEEP BURNER AND CONTROL
COMPARTMENT CLEAN.
Read owner's manual before using/installing. Be sure
CHAINED LIGHTING INSTRUCTION TAG hangs at the
lowest position in the furnace under/below the heat shield.
BURNER AND CONTROL
Instruction tag