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Williams 3501922A - User Manual

Williams 3501922A
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Owners Manual Save this manual for future reference.
Williams Furnace Co. 250 West Laurel Street Colton, California 92324 U.S.A.
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 or cell phone in your building.
Extinguish any open flame.
Immediately call your gas supplier from a
neighbors phone. Follow the gas supplier’s
instructions.
If you cannot reach the gas supplier, call the fire
department.
Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.
WARNING: Improper installation, adjustment, alteration,
service or maintenance can cause injury or property
damage. Refer to this manual. For assistance or for
additional information consult a qualified installer,
service agency or the gas supplier.
Vented Room Heaters
Model Numbers:
2001622A; 2011622A; 2031622A; 2051622A; 3501522A; 3511522A;
3531522A; 3551522A; 3501922A; 3511922A; 3531922A; 3551922A;
3502522A; 3511522A; 3532522A; 3552522A; 3502922A; 3512922A;
3532922A; 3552922A; 5001522A; 5011522A; 5031522A; 5051522A;
5001922A; 5011922A; 5031922A; 5051922A; 5002522A; 5012522A;
5032522A; 5052522A; 5002922A; 5012922A; 5032922A; 5052922A;
6501522A; 6511522A; 6531522A; 6551522A; 6501922A; 6511922A;
6531922A; 6551922A; 6502522A; 6512522A; 6532522A; 6552522A;
6502922A; 6512922A; 6532922A; 6552922A
FOR USE WITH NATURAL GAS ONLY
Model Numbers:
2001621A; 2011621A; 2031621A; 2051621A; 3501521A; 3511521A;
3531521A; 3551521A; 3501921A; 3511921A; 3531921A; 3551921A;
3502521A; 3512521A; 3532521A; 3552521A; 3502921A; 3512921A;
3532921A; 3552921A; 5001521A; 5011521A; 5031521A; 5051521A;
5001921A; 5011921A; 5031921A; 5051921A; 5002521A; 5012521A;
5032521A; 5052521A; 5002921A; 5011921A; 5032921A; 5052921A;
6501521A; 6511521A; 6531521A; 6551521A; 6501921A; 6511921A;
6531921A; 6551921A; 6502521A; 6512521A; 6532521A; 6552521A;
6502921A; 6512921A; 6532921A; 6552921A
FOR USE WITH LIQUEFIED PETROLEUM (L.P.) GAS ONLY
READ THIS OWNER’S MANUAL CAREFULLY BEFORE YOU INSTALL
YOUR NEW WILLIAMS HEATER.
WARNING: If the information in these instructions
is not followed exactly, a fire or explosion may
result causing property damage, personal injury or
loss of life.
ENCLOSED MODEL
FIREPLACE MODEL
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.

Questions and Answers

  • Y
    Yolanda RomeroAug 14, 2025
    What causes pilot outage in my Williams Gas Heater?
    • N
      nlopezSep 12, 2025
      A pilot outage can occur if the pilot flame is too low or blowing too high, causing it to drop out; adjust the pilot flame accordingly. Also, the pilot orifice may be plugged, so check for spider webs or other obstructions. Drafts or drafty areas can also extinguish the pilot light, so check for doorways and high air movement areas.
  • A
    Angela YoungAug 17, 2025
    Why won't the pilot light stay lit on my Williams Gas Heater?
    • M
      Michael MillerAug 17, 2025
      Several factors could be at play. First, the generator may not be producing enough millivolts; ensure the pilot flame impinges on it by 1/4 to 3/8 inches and that the thermocouple is fully inserted. Also, check for loose or dirty generator connections at the gas valve, cleaning and tightening them as needed. The generator itself could be defective, requiring a millivolt meter check (reading should be 450 millivolts or more with thermostat wires disconnected). A grounded thermostat wire could also be the culprit; remove the wires to check and trace for any grounding. As a last resort, the valve itself might be defective, needing replacement after the other possibilities have been ruled out.
  • J
    Jennifer BaileyAug 20, 2025
    What to do if my Williams Gas Heater burner comes on but goes off before the blower starts?
    • B
      Bryan GomezAug 20, 2025
      This issue could stem from the thermostat's location. Ensure it isn't in the path of warm air from the heater, near a lamp, or above a TV or stereo. Alternatively, the thermostat itself might be defective, requiring calibration or replacement.
  • E
    Erika HollandAug 25, 2025
    What to do if my Williams Gas Heater operates, but will not shut off after room temperature is attained?
    • C
      cherylturnerAug 25, 2025
      There are several potential causes. The thermostat wiring may be defective, possibly shorted by a nail or staple; try removing the thermostat leads from the valve terminals to check. The thermostat's location could also be the problem; if it's on an outside wall or there's a hole behind it, cold air might be interfering. Relocate the thermostat or plug the hole. The thermostat itself could be defective, so verify its temperature reading or replace it. Finally, the valve might be stuck open, requiring replacement.
  • B
    Brett MorrisAug 27, 2025
    Why is my Williams Gas Heater not producing enough heat?
    • A
      Andrew KellerAug 27, 2025
      The heater may be too small for the space you're trying to heat, so check the heat sizing calculations. Also, the heater might not be burning at its full rate. Check for low gas pressure at the gas valve (it should be 4 inches W.C. for Natural Gas or 10.5 inches W.C. for L.P.G.) and look for any blockage in the burner orifice.
  • J
    Jerry ReyesAug 30, 2025
    Why is the main burner on my Williams Gas Heater not staying on?
    • D
      Daniel Welch MDAug 30, 2025
      Several factors could be responsible. Start by checking the vent pipe for any blockages like bird nests, twigs, or leaves. The thermostat's location is also important; if it's on an outside wall or exposed to drafts, relocate it or plug any holes. Restrictions in the vent system, caused by too many offsets, can also cause this issue. Ensure you're using the correct type of vent pipe (listed B/W type) and that it's properly installed. Finally, check for loose connections on the vent safety wiring harness, tightening them if necessary.
  • J
    Joseph ClineSep 2, 2025
    What to do if the pilot is burning but there is no gas to the main burner in my Williams Gas Heater?
    • A
      Alexander HesterSep 2, 2025
      First, ensure the thermostat is set to a position that calls for heat. Next, check for a plugged burner orifice and clean or replace it if necessary. Inspect the thermostat wires for improper wiring or breaks, and check the connections at the valve terminals. The pilot generator may not be generating enough millivoltage to open the valve; refer to solutions 1A and 1C for guidance. Lastly, the valve itself might be defective and require replacement.
  • A
    Angela SilvaSep 6, 2025
    Why is my Williams Gas Heater making abnormal noises?
    • B
      Brenda WellsSep 6, 2025
      Abnormal operation can manifest in various ways. Delayed ignition might occur if the pilot flame is too low, so adjust it. Expansion noises or ticking could be due to the heater being distorted by uneven venting or a restricted vent. Combustible gas spillage could be caused by a blocked flue, excessive downdraft, or negative pressure in the room. Excessive flame roll-out might indicate the heater is overrated, so check for high gas pressure. An over-fired burner could also be the issue, so check the manifold gas pressure and ensure proper derating for elevations above 2,000 feet. Lastly, yellow burner or pilot flames could indicate obstructions, so inspect and clean or replace orifices as needed.
  • V
    valeriehenrySep 9, 2025
    Why is my Williams Gas Heater blower noisy?
    • S
      Stacy FosterSep 10, 2025
      A noisy blower could be due to several reasons. The housing might be rattling, so tighten the blower screws. The blower itself could be dirty, so clean the blower wheel. Alternatively, the blower wheel might be bent, requiring straightening or replacement.

Summary

Warranty

Installation Record

Details for recording the heater's installation by a qualified professional.

Safety Rules

General Safety Precautions

Essential safety guidelines for heater installation, operation, and maintenance.

Gas Safety and Leak Detection

Procedures for handling gas leaks and ensuring safe gas usage.

Installation and Maintenance Safety

Safety requirements for installation, repair, and routine upkeep by qualified personnel.

Introduction

Basic Description

Overview of the heater's construction, features, and operational requirements.

Basic Tools and Materials

Lists of necessary tools and materials for heater installation.

Helpful Installation Information

References to additional booklets and codes for installation guidance.

Optional Accessories

Information on available accessories like blowers and vent collars.

Unpack Your Heater

Instructions for carefully unpacking and inspecting the heater components.

Installing Your Heater

Heater Location and Clearances

Guidelines for selecting a safe location and maintaining required clearances.

Gas Supply and Piping

Requirements for connecting the natural gas or L.P. gas supply and piping.

Combustion and Ventilation Air Requirements

Ensuring adequate air supply for safe combustion and ventilation.

Thermostat Installation

Procedures for installing and wiring the thermostat for heater control.

Wall and Cabinet Mounted Thermostats

Specific installation steps for different thermostat mounting types.

Vent Installation

Vent Safety System

Importance and function of the vent safety shutoff system.

General Venting Rules and Methods

Rules for safe and effective venting, including pipe types and connections.

Venting Methods and Clearances

Proper techniques for venting into chimneys and maintaining safe distances.

Operating Your Heater

Start-Up and Basic Checks

Initial steps for starting the heater and verifying gas and pilot functions.

Flame Characteristics and Abnormalities

Identifying normal and abnormal burner flame appearances and their causes.

Operating Procedures and Safety

Step-by-step instructions for operation, lighting, and shutdown safety.

Caring for Your Heater

Cabinet and Exterior Care

Cleaning and maintaining the heater's exterior cabinet finish.

Blower, Pilot, and Vent System Care

Maintenance steps for the blower, pilot burner adjustment, and vent system.

Burner and Combustion Chamber Cleaning

Procedures for cleaning internal burner components and the combustion chamber.

Glass Cleaning

Instructions for safely cleaning the heater's glass viewing panel.

Replacement Parts

Enclosed Front Exploded View

Diagram illustrating the components of the enclosed front model.

Parts List for Enclosed Models

Comprehensive list of replacement parts for enclosed models with part numbers.

Fireplace-Look Exploded View

Diagram illustrating the components of the fireplace-look model.

Parts List for Fireplace-Look

Comprehensive list of replacement parts for fireplace-look models with part numbers.

Blower Accessory 2102

Mounting and Wiring the Blower

Step-by-step guide for installing and electrically connecting the blower accessory.

Blower Operation and Parts

Instructions on operating the blower and a list of its replacement parts.

Troubleshooting

Pilot and Burner Operation Issues

Diagnosing and resolving problems related to pilot light and main burner ignition.

Heater Operation, Shutoff, and Venting Issues

Troubleshooting common issues with heater operation, shutdown, and venting.

Blower and Abnormal Operation Issues

Addressing problems with blower function and abnormal heating operation.

Hints and Information

Service Hints

Advice for avoiding service calls by using the troubleshooting guide.

Ordering Repair Parts

Information required when ordering replacement parts for the heater.

Williams 3501922A Specifications

General IconGeneral
BrandWilliams
Model3501922A
CategoryHeater
LanguageEnglish

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