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MODELS:

NATURAL GAS ONLY

2001622; 2031622; 2051622
3501522; 3531522; 3551522
3501922; 3531922; 3551922
3502522; 3532522; 3552522
3502922; 3532922; 3552922
5001522; 5031522; 5051522
5001922; 5031922; 5051922
5002522; 5032522; 5052522
5002922; 5032922; 5052922
6501522; 6531522; 6551522
6501922; 6531922; 6551922
6502522; 6532522; 6552522
6502922; 6532922; 6552922

3501522.3; 3531522.3; 3551522.3
2001622.3; 2031622.3; 2051622.3

MODELS:

PROPANE GAS ONLY

2001621; 2031621; 2051621 
3501521; 3531521; 3551521
3501921; 3531921; 3551921
3502521; 3532521; 3552521
3502921; 3532921; 3552921
5001521; 5031521; 5051521
5001921; 5031921; 5051921
5002521; 5032521; 5052521
5002921; 5032921; 5052921
6501521; 6531521; 6551521
6501921; 6531921; 6551921
6502521; 6532521; 6552521
6502921; 6532921; 6552921

INSTALLATION & OPERATING INSTRUCTION MANUAL

Vented Room Heaters

WARNING:

If the information in this

manual is not followed exactly, a fire or
explosion may result, causing property
damage, personal injury or loss of life.

Do not store or use gasoline or other 

flammable vapors and liquids in the 

vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS

Open all windows.
Do not try to light any appliance.
Do not touch any electrical switch. 
Do not use any phone in your building.
Extinguish any open flame.
Immediately call your gas supplier 

from a neighbor’s phone.  Follow 

the gas supplier’s instruction.

If you cannot reach your gas supplier,

call the fire department.

Installation and service must be performed 

by a qualified installer, service agency or 

the gas supplier.

WARNING:  Do not install this heater  (Natural or
L.P. Gas) in mobile homes, trailers or
recreational vehicles.

WARNING: Improper installation, adjustment,
alteration, service, or maintenance can cause
injury or property damage.  Refer to this manual.
For assistance or additional information, consult
a qualified installer, service agency or the gas
supplier.

WARNING: Installation and repair must be done
by a qualified service person.  The appliance
should be inspected before use and at least
annually by a professional service person.

Williams Furnace Co., 250 West Laurel Street, Colton, CA 92324   U.S.A.

ENCLOSED MODEL

FIREPLACE MODEL

Summary of Contents for 2001621

Page 1: ...re or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS Open all windows Do not try to light any appliance Do not touch any...

Page 2: ...the full value from this heater If the answer to the problem is found within this instruction manual it could help you avoid needless service costs Basic Description Helpful Installation Information T...

Page 3: ...doors so that harmful gases will not collect inside the building Follow the venting instructions for your type of installation exactly Use only the type and size of vent pipe and fittings specified 9...

Page 4: ...ay be placed directly on wood floors Heavy pile or shag rugs may restrict normal air flow Some floor coverings discolor easily from even low heat To assure safe operation a metal or wood panel extendi...

Page 5: ...on of liquefied petroleum gases WARNING WHEN CONNECTING FIELD PIPING USE A SECOND WRENCH TO KEEP THE HEATER VALVE FROM TURNING SUPPORT FIELD PIPING PROPERLY STRESS AND OVER TIGHTENING COULD DAMAGE THE...

Page 6: ...nting holes with screws provided 5 Replace the thermostat cover 6 Do not run wire in any location where it might be damaged Avoid splicing thermostat wires unless the spliced wires are properly cleane...

Page 7: ...thermostat to lowest setting 2 Turn off all electric power to the appliance if servicing is to be performed 3 Open control access panel 4 Push in gas control knob slightly and turn clockwise to OFF po...

Page 8: ...the upper left corner on the back of the heater and replace the corner bracket with the speed switch plate using the existing mounting holes item 7 The correct position for the fan switch is shown be...

Page 9: ...a horizontal run is necessary the pipe must pitch upward at least 1 4 inch to the foot It must be supported securely and joints fastened by sheet metal screws or rivets Under no circumstances should t...

Page 10: ...prevent obstructions of the vent The cowl will also prevent excessive downdraft that can cause carbon monoxide to enter into the home Do not use a homemade cowl They are dangerous and can restrict the...

Page 11: ...ed by Step 2 then input 1 000 x 3 600 34 106 000 Btu Per hour This measured input must not be greater than the input indicated on the rating plate of the heater Step 4 Relight all other appliances tur...

Page 12: ...from fan blades fan motor and exposed air passages Annually put two drops of SAE 20 oil in each of the two cups or oil tubes Pilot Burner Light pilot using instructions in OPERATING INSTRUCTIONS Leave...

Page 13: ...fficient millivoltage to open valve See 1A and 1C above E Defective valve Replace 3 Furnace operates but turns OFF before room temperature is attained A Thermostat location Check thermostat location I...

Page 14: ...or flexible chimney liner is recommended E Loose connections on the vent safety wiring harness Check the connection on both the switch and the gas valve Tighten if necessary 8 Abnormal operation A De...

Page 15: ...rifice Fitting P500086 P500086 9 Burner Orifice P322915 P501771 10 Pilot Generator Assembly P501618 P501617 11 Electrode P322276 P322276 12 Igniter Bracket 7A189 7A189 13 Vent Safety Switch P500406 P5...

Page 16: ...000079 K000079 K000041 K000041 K000045 K000045 11 Burner P501620 P501620 P501621 P501621 P501622 P501622 12 Cabinet Top K000223 K000223 K000224 K000224 K000225 K000225 13 Control Bracket K000147 K0001...

Page 17: ...16 Enclosed Front...

Page 18: ...6 P500086 P500086 P500086 13 Manifold Pipe P500087 P500087 P500088 P500088 P500089 P500089 14 Gas Control Valve P323011 P322660 P322660 P323011 P323011 P322660 15 Thermostat P322016 P322016 P322016 P3...

Page 19: ...Fireplace Look with Logs 18...

Page 20: ...e for labor or installation 3 This warranty does not extend to painted surfaces nor to damage or defects resulting from accident alteration misuse or abuse or improper installation 4 This warranty doe...

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