Operating Your Furnace
ELECTRONIC IGNITION MODELS*
3508331; 3508332
5508331, 5508332
NOTE:
For models equipped with WILLIAMS gas valve P322043
or P322044 refer to this sheet and sheet 29 for "SAFETY
& LIGHTING INSTRUCTION" and "TURN GAS OFF TO
APPLIANCE."
For models equipped with WILLIAMS gas valve P321897
or P321898 refer to this sheet and sheet 30 for "SAFETY
& LIGHTING INSTRUCTIONS" and "TURN GAS OFF TO
APPLIANCE."
(All other models refer to sheet 25, 26 & 27.)
WARNING
DANGER OF IGNITION FLASH
AND EYE INJURY OR BLINDNESS
PROTECT YOUR EYES. NEVER ATTEMPT TO
LIGHT PILOT WITH GAS CONTROL VALVE KNOB
IN "ON" POSITION. FLASHBACK COULD OCCUR.
NOTE: Models 3508331; 3508332 are equipped with a
single speed fan.
TWO-SPEED FAN OPERATION
MODELS: 5508331; 5508332
Formodels equipped with WILLIAMS gas valve P322043
or P322044.
THE FURNACE WORKS LIKE THIS:
1. Thermostat turns on the control module.
2. Automatic relight system (in module) opens gas valve
and electronically ignites pilot. After pilot flame has
been established and proven by the control module,
main gas valve circuit opens and pilot lights main
burners.
3. Heat builds up in the furnace and starts the fan. The
heated air comes out the front bottom Iouvered 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 furnace,
then it turns off.
Blower will first operate at low speed then shift to high
speed as the furnace heats up.
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, blower will operate at low speed. Turn the rate
knob to the "HI" position only when a fast heat-up is
desired during extremely cold weather. High operation
develops maximum capacity of the furnace, blower will first
operate at low speed then shift to high speed as the fur-
nace heats up.
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 the furnace cabinet; this limit switch
will reset when furnace cools; (3) A thermal overload pro-
tects the motor against burnout caused by current surges
or if anything should block the flow of air through the fur-
nace, the switch will turn the main burner off. When motor
cools down, this switch will reset itself. This switch can-
not be adjusted.
WARNING
THE SURFACE OF THE FURNACE IS HOT DUR-
ING OPERATION. KEEP CHILDREN, CLOTHING,
FURNITURE, AND FLAMMABLE MATERIAL AWAY
FROM IT.
On new installations the gas lines will be filled with air and
it may take several minutes to establish the pilot flame.
Keep all access doors and panels in place except for in-
spection and maintenance.
WARNING
DANGER OF PROPERTY DAMAGE,
BODILY INJURY OR DEATH
IF THE FURNACE OVERHEATS OR FAILS TO
SHUT OFF, CLOSE MANUAL GAS VALVE FOR THE
FURNACE BEFORE TURNING OFF ELECTRIC
POWER.
--28--
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