Operating The Furnace; Safety Limit Control; Two-Speed Fan Operation - Williams 5508332 Owner's Manual

Operating Your Furnace
STANDING PILOT MODELS*
3508731; 3508732
5008731; 5008732
6508731; 6508732
NOTE:
For models equipped with WILLIAMS gas valve P322041
or P322042 refer to this sheet and sheet 26 for "SAFETY
& LIGHTING INSTRUCTION" and "TURN GAS OFF TO
APPLIANCE."
For models equipped with WILLIAMS gas valve P321704
or P321705 refer to this sheet and sheet 27 for "SAFETY
& LIGHTING INSTRUCTIONS" and "TURN GAS OFF TO
APPLIANCE."
(All other models refer to sheet 28, 29 & 30.)
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
THE SURFACE OF THE FURNACE IS HOT DUR-
ING 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 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 3508731; 3508732 are equipped with a
single speed fan.
TWO-SPEED FAN OPERATION
MODELS: 5008731; 5998732; 6508731; 6508732
For models equipped with WILLIAMS gas valve P322041
or P322042.
Blower will first operate at low speed then shift to high
speed as the furnace heats up.
For models equipped with WILLIAMS gas valve P321704
or P321705.
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.
SAFETY LIMIT CONTROL
These furnaces are protected against unsafe operation by
five automatic safety controls: (1) A safety pilot acts to shut
OFF the gas valve in case of pilot failure; (2) A redundant
gas valve; (3) A limit switch shuts down the main burner
to prevent overheating the furnace cabinet; (4) A vent safe-
ty shutoff device shuts down the main burner to protect
against improper venting of combustion products. These
limit switchs will reset when furnace cools; and (5) A ther-
mal overload protects the motor against burnout caused
by current surges or if anything should block the flow of
air through the furnace. This switch will reset itself when
the motor cools down and it cannot be adjusted.
IMPORTANT
KEEP BURNER AND CONTROL COMPARTMENT
CLEAN.
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.
--25--