Williams 4505621 Instruction Manual download pdf (Page 13)

Operating The Furnace

Always follow the instructions located beneath the furnace

grille when lighting the pilot. To set the thermostat, turn the

temperature selector to the highest setting until the heated

area reaches the desired temperature, then move the selector

slowly toward a lower setting until the furnace control cycles

off the burner. At this setting, the furnace should cycle on

and off as required to maintain the desired temperature.

WARNING

THE SURFACE OF THE FURNACE IS HOT DURING

OPERATION. KEEP CHILDREN, CLOTHING,

FURNITURE AND FLAMMABLE MATERIAL AWAY

FROM THE FURNACE.

This furnace is equipped with a control that limits the tem-

perature of the furnace grille by cycling the main burner.

This control may be overridden to allow more heat output

from the furnace during extreme weather when the furnace

will not provide sufficient heat otherwise. The overide

mechanism is located beneath the grilleonthe control end.

To override the temperature limit control, pull up on the

chain attached to the grille until the flap bearing the

"Register Hot--" warning is in the horizontal position. Insert

chain through slot to the side of the flap to hold flap in the

horizontal position (see Figure 13). To reactivate the tam-

perature limit control, remove chain from slot and the flap

will hang down. Do not override the temperature limit con-

trol if the furnace is in an area occupied by children or

elderly persons who could fall on the furnace and be

burned.

FIGURE 13

How To Care For Your Furnace

Service, repair or maintenance of the furnace, vent or gas

system should only be attempted by a qualified service

technician.

The burner and control of the furnace should be cleaned and

checked at least once each year by a qualified service

technician. If there is any indication that the furnace is

operating improperly, turn it off and have it checked

immediately.

Lint and dust may be vacuumed from the interior of the

furnace, when it is cool, by removing the floor grille. The

control and main burner can be blown free of dust and lint

with a vacuum cleaner.

WARNING

I DO NOT STORE OR USE GASOLINE OR OTHER

FLAMMABLE LIQUIDS OR VAPORS NEAR THE

FURNACE.

If the combustion chamber must be removed for servicing -

1. Turn the gas off at the main gas line shut-off valve.

2. Remove the floor grille and lift out the inner casing.

3. Lift the control end of the combustion chamber slightly,

slide the chamber toward the end of the cabinet about

one inch and then lift it out of the cabinet.

WARNING

DANGER OF BODILY INJURY OR DEATH

DO NOT OPERATE THE FURNACE WITH A

BROKEN OR MISSING PILOT OBSERVATION

DOOR.

If the control and main burner assembly must be removed

for servicing -

1. Turn the gas off at the main shut-off valve.

2. Disconnect the union in the gas supply line_

3. Remove the thermostat control wires from the gas control.

4. Remove the nuts that attach the gas control to the furnace

outer casing.

5. Remove the control assembly.

6. Remove the screw that attache s the control end of the

burner to the outer casing.

7. Slide the bumer forward until the control end of the bumer

can be dror)peddow n and pul! the burne[ OUtof the outer

casing.

This should be done by a qualified service technician.

If the furnace will oot be used for a long period of time, turn

the control knob to the "OFF" positionand turn off the shut-

off valve in the gas line serving the furnace.

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Williams 4505621 Instruction Manual Page 13

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