Williams 8931, 8932, 8933, 8934 User Manual

Instructions for Williams Gas Appliance

KIT CONTENTS:

(1) Pressure Regulator (2) Conversion Labels
(4) Pilot Orifices (L.P. Gas) (2) Screws
(1) Burner Orifice (L.P. Gas) (1) L.P.G. Tag

Kit number 8931, 8932, 8933 & 8934 is for use with model numbers: 2001622;
2001621; 2001621; 3501522; 3501922; 3501922; 3501521; 5001522; 3501921;
5001522; 5001922; 5001521; 5001921; 5002522; 5002922; 5002521; 5002921;
6501522; 6501922; 6501521; 6501921; 6502522; 6502922; 6502521; 6502921,
MANUFACTURED FOR USE WITH PROPANE GAS AND EQUIPPED WITH GAS
VALVE PART NUMBER 6003 ONLY.

WARNING: This conversion kit shall be installed by a qualified service agency in accordance with
the manufacturer’s instructions and all applicable codes and requirements of the authority having
jurisdiction. If the information in these instructions is not followed exactly, a fire, explosion or
production of carbon monoxide may result, causing property damage, personal injury or loss of life.
The qualified service agency is responsible for the proper installation of this kit. The installation is not
proper and complete until the operation of the converted appliance is checked as specified in the
manufacturer’s instructions supplied with the kit.

WARNING: The Williams conversion kit numbers 8931, 8932, 8933 & 8934 can only be used on
model gas valve 6003. It must never be used on any other brand of gas valve. DO NOT USE THE
CONVERSION KIT ON ROBERTSHAW BRAND GAS VALVES. If you are unable to determine that
gas valve model number, do not convert your furnace.

MANUFACTURED FOR USE WITH PROANE GAS AND EQUIPPED WITH GAS VALVE PART
NUMBER 6003 ONLY.

CAUTION: The gas supply shall be shutoff prior to disconnecting the electrical power (if equipped
with blower) before proceeding with the conversion.

CONVERSION INSTRUCTIONS-NATURAL GAS TO L.P. GAS

1. Shut off gas to the furnace.

2. Shut off electric to the furnace (if equipped with blower).

3. Remove face panel from furnace.

4. Disconnect gas supply line from control valve.

5. Disconnect thermostat wires from control valve.

CAUTION: Label all wires prior to disconnection for proper reconnection

6. Use a boxed end wrench and remove the main burner orifices (2) from the manifold and
replace with the orifices provided in this kit. See Figure on page 2.

7. Remove pilot orifices from pilot and replace with orifice provided in this kit. See Figure 2A, B.

8. To replace the pressure regulator on the gas valve. Refer to Figure 1.

9. Push in gas control knob slightly and turn clockwise to “OFF”

Conversion Kits 8931, 8932, 8933 &8934

Natural Gas To Liquid Propane Gas

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10. Remove (2) screws from the pressure regulator.

11. Lift the pressure regulator and gasket from valve and discard.

12. Install the new gasket, pressure regulator and (2) screws from this conversion kit.

IMPORTANT: Discard old gasket and screws. Do not reuse.

13. IMPORTANT: Check the location of the pilot to the burner. See Figure4.

14. Reassemble the furnace by following Steps 1 thru 5 in reverse order.

IMPORTANT: LABEL PLACEMENT

After conversion is completed, the large conversion label provided in this kit must be filled out
completely (using chart information). Attach small conversion label to gas valve, and attach large
data conversion label to inside of the casing door next to rating plate. Remove:”Natural Gas” tag from
burner and replace with “Liquid Propane Gas’ tag provided with this kit. This is necessary to provide
information for future servicing. Failure to do so could result in property damage, personal injury or
death.

Refer to the Lighting and Operating Instruction Plate located in control area of furnace for instructions
on lighting the burner.

WARNING

Any adjustments must be performed by a qualified service technician only. Improper adjustments
could result in property damage, personal injury or death. The following information is provided for
use by a qualified service technician.

With main burner in operation, check all pipe connections, pilot gas tubing and around pressure
regulator for gas leaks with a rich soap and water solution. Bubbles indicate gas leakage. Never use
a match or open flame to test for leaks. Correct even the slightest leaks at once before using
furnace.

ADJUST PILOT BURNER
NOTE: Pilot gas may need adjustment depending on inlet pressure, increase or decrease to

obtain proper setting.

Pilot flame should surround 3/8 inch to 1/2 inch of the generator tip. To adjust, remove pilot
adjustment cap.

1. Remove screw cover over pilot adjusting screw.

2. Insert small screwdriver. Adjust flame as needed. Turn screw counter clockwise to
increase flame or clockwise to decrease flame.

3. Turn thermostat to highest setting. Main burner should light quickly and smoothly. Turn
thermostat to lowest setting. Main burner should go out. Pilot should remain lit.

4. Replace screw cover over pilot adjusting screw.

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