Operating Your Furnace
WARNING: DUE TO HIGH SURFACE
TEMPERATURES - KEEP CHILDREN,
CLOTHING, FURNITURE OR ANY
COMBUSTIBLE MATERIAL AWAY FROM THE
FURNACE.
ELECTRONIC IGNITION MODELS
4007332; 5507332; 4007331; 5507331
NOTE:
For models equipped with WILLIAMS gas valve P322043 or
P322044 refer to this page and Page 26 for "SAFETY &
LIGHTING INSTRUCTION" and "TURN GAS OFF TO
APPLIANCE." For models equipped with WILLIAMS gas valve
P321897 or P321898 refer to this page and page 27 for
"SAFETY & LIGHTING INSTRUCTION" and "TURN GAS OFF
TO APPLIANCE."
(All other models refer to page 22, 23 & 24.)
THE FURNACE WORKS LIKE THIS:
1. The thermostat turns on the control module.
2. Automatic relight system (in the module) opens the gas
valve and electronically ignites the pilot. After the pilot
flame has been established and proven by the control
module, the main gas valve circuit opens and the pilot
lights the main burners.
3. Heat builds up in the furnace and starts the fan. The heated
air comes out the front bottom louvered panel at floor level.
4. When the thermostat setting is reached, it shuts off the
main burner.
5. The fan runs until the heat is removed from the furnace,
then it turns off.
IMPORTANT
KEEP BURNER AND CONTROL COMPARTMENT CLEAN.
SAFETY LIMIT CONTROL
These furnaces are protected against unsafe operation by
three automatic safety controls: (1) The electronic ignition
system. (2) A limit switch shuts down the main burner to
prevent overheating of the furnace cabinet. This limit switch will
reset when furnace cools. (3) A thermal overload switch
protects the motor against burnout caused by current surges or
if anything should block the flow of air through the furnace. The
switch will turn the main burner off. When motor cools down,
this switch will reset itself. This switch cannot be adjusted.
WARNING: The surface of the furnace is hot
during operation. Keep children, clothing,
furniture, and flammable material away from it.
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.
For models equipped with WILLIAMS gas valve P321897 or
P321898.
Models are equipped with a two-rate control valve. The rate
knob on the gas valve is marked "LO" and "HI." Turn the rate
knob to the "LO" position and the room thermostat will operate
the main burner at about 70% of maximum capacity. Turn the
rate knob to the "HI" position only when a fast heat-up is
desired during extremely cold weather. High operat1on
develops maximum capacity of the furnace.
A two-speed fan is used with models: 5507331 and
5507332.
Blower will first operate at low speed then shift to high speed
as the furnace heats up.
WARNING: Danger of property damage, bodily
injury or death. If the furnace overheats or fails to
shut off, turn off the manual gas valve to the
furnace before turning off electric power.
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