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INFRARED VENT-FREE
NATURAL GAS
SPACE HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
Do not store, or use gasoline or other ammable
vapors and liquids in the vicinity of this or any
other appliance.
WHAT TO DO IF YOU SMELL GAS
Do not try to light any appliance.
Do not touch any electrical switch; do not
use any phone in your building.
Im m ediatel y call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
If you cannot reach your gas supplier, call
the re department.
Installation and service must be performed by a
Model # 0696542, 1096542
qua l i fied in s ta ller , se r v ice ag e n cy or gas
supplier.
Table of Contents
Important Safety Information......................................2
Product Features......................................................3
Proper Ventilation & Fresh Air...................................4
Installation.................................................................6
Operating Your Heater.............................................10
Cleaning & Maintenance.........................................12
Troubleshooting.......................................................13
Specications..........................................................16
Parts List..................................................................17
WARNING: If the information in this
manual is not followed exactly, a re o r
ex pl os io n m ay r e su lt causing property
damage, personal injury, or loss of life.
WAR N ING: This is an unvented gasred heater. It uses air (oxygen) fr o m
t h e ro o m in wh i c h it is install ed.
Pr ovisions for ad e quate combustion and
ventilation air must be pr ov i d e d. Re f e r
t o Ai r F or Combustion and Ventilation
section on page 4 of this manual.
WARNING: Improper installation, adjustment, alteration, service or maintenance can
cause injury or property damage. Refer to this
manual for correct installation and operational
procedures. For assistance or additional
information consult a qualied installer, service
agency, or gas supplier.
This appliance may be installed in an aftermarket* permanently located, manufactured
(mobile) home, where not prohibited by local codes.
This appliance is only for use with the type
of gas indicated on the rating plate. This
appliance is not convertible for use with other
gases.
WATER VAPOR: A BY-PRODUCT OF UNVENTED ROOM
HEATERS
Water vapor is a by-product of gas combustion.An unvented room heater productes approximately one (1)
ounce (30ml) of water for every 1,000 BTU’s (.3KW’s) of
gas input per hour. Refer to page 3.
*Aftermarket: Completion of sale, not for purpose of
resale, from the manufacturer.
Williams Furnace Company
250 West Laurel Street
Colton, California 92324
the consumer.
Consumer: Please retain these instructions for
future use.
Installer: Please leave these instructions with
WILLIAMS FURNACE PHONE NUMBER: 909-825-0993
http://www.wfc-fc.com
Printed in China WS-ML062-13-1206
IMPORTANT
SAFETY INFORMATION
WARNINGS
I M P ORTAN T : Read this
ow ner ’s m anual care fully and
co mp l et e ly be fo r e tr y in g t o
assem b l e , o p e ra te , or serv i c e
this heate r. Impro p e r us e of
this heater can cause serious
injury or death fr o m burns,
f i re , e xp l o si o n , e l e c t r ic a l
sh o c k , and ca r b o n monoxide
poisoning.
WARNING: Do not use any
acces s o r y no t appr o v e d for
use with this heater.
WARNING: Any change to
this heater or its controls can
be dangerous.
Do not place clothing or other
flammable material on or near
the appliance. Never place any
objects on the heater.
Due to high temperatures, heater
s h o ul d b e k e p t o u t o f
traffic and away from furniture
and draperies.
Sur f ace o f hea t e r b e c ome s
very hot when running heater.
Keep children and adults away
from hot surface to avoid burns
or clothing ignition. Heater will
remain hot for a time after shut
down. Al l ow surf a c e to co o l
before touching.
C a r e fu l l y s u pe r v i s e y o u n g
children when they are in the
same room with heater.
Ma k e sure grill guard is in
place before running heater.
State of Massachusetts: The in-
stallation must be made by a licensed
plumber or gas tter in the Commonwealth of Massachusetts.
Sellers of unvented propane or natural
gas-red supplemental room heaters
shall provide to each purchaser a
copy of 527 CMR 30 upon sale of
the unit.
In the state of Massachusetts, unvented propane or nature gas-red
space heaters shall be prohibited in
bedrooms and bathrooms.
Keep the appliance area clear
an d fr e e fr o m co m bu s ti b le
materi a l s , ga s o l i ne , and ot he r
flammabl e vapo rs and liqu ids.
WARNING
Models 0696542, 1096542 are
equipped for natural gas. Field conversion is not permitted.
1. This appliance is only for use
with the type of gas indicated
on the rating plate. This
appliance is not convertible for
use with other gases.
2. If you smell gas
Shut off gas supply.
Do not try to light any appliance.
Do not touch any electrical switch,
do not use any phone in your
building.
Immediately call your gas sup
plier from a neighbor’s phone.
Follow the gas supplier’s
instructions.
If you cannot reach your gas
supplier, call the re
department.
3. Do not install models 0696542
1096542 in a bathroom.
4. This heater needs fresh,
outside air ventilation to run
properly. This heater has an
Oxygen Depletion Sensor
(ODS) safety shutoff system.
The ODS shuts down the
heater if not enough fresh air
is available. See Fresh Air For
Combustion And Ventilation
pages 4 through 6
5. Keep all air openings in the
front and bottom of heater
clear and free of debris. This
will insure enough air for
proper combustion
6. If heater shuts off, do not
relight until you provide fresh,
outside air. If heater keeps
shutting off, have it serviced.
7. Do not operate heater
where ammable liquids or va
pors are used or stored
under dusty conditions
8. Turn heater off before using
furniture polish, wax, carpet
2
cleaner, or similar products. If
heated, the vapors from these
products may create a white
powder residue within burner
box or on adjacent walls or
furniture.
9. Always run heater with control
knob at ON, LOW or HIGH
locked positions. Never set
control knob between locked
positions. Poor combustion
and higher levels of carbon
monoxide may result.
10. Do not use heater if any part
has been under water.
Immediately call a qualied
service technician to inspect
the room heater and to
replace any part of the control
system and any gas control
which has been under water.
11. Turn off heater and let cool
before servicing. Only a qualied
service person should service
and repair heater.
12. Operating heater above
elevations of 4,500 feet could
cause pilot outage.
DANGER: Carbon monoxide
poisoning may lead to death!
Carbon Monoxide Poisoning.
Early signs of carbon monoxide
poiso ning rese mble the flu with
headaches, dizz iness, or nausea
If you have these signs, the heater
may not be working properly. Get
fresh air at once! Have heater
serviced. Some people are more
affected by carbon monoxide than
ot hers. The se i nclud e pregn ant
women, persons with heart or lung
disease or anemia, those under
the inuence of alcohol, and those
at high altitudes.
Na tural Ga s: Natura l gas i s
odorless. An odor-making agent is
added to natural gas. The odor
helps you detect a natural gas
leak. However, the odor added to
natural gas can fade. Natural gas
may be present even though no
odor exists. Make certain you read
and understand all warnings. Keep
this manual for reference. It is your
guide to safe and proper operation
of this heater.
PRODUCT FEATURES
Figure1-Vent-Free Natural Gas Heater
SAFETY DEVICE
A standard requirement for all vent-free room
heaters, this heater has a pilot with an Oxygen
Depletion Sensor(ODS) safety shutoff system.
The ODS/pilot shuts off the heater if there is
not enough fresh air.
PIEZO IGNITION SYSTEM
This heater is equipped with a piezo ignitor.
This system requires no matches, batteries, or
other sources to light heater.
THERMOSTATIC HEAT
CONTROL ON THERMOSTAT
MODELS
These heaters have a control valve with a
thermostat sensing bulb. This results in the
greatest heater comfort and may result in
lower gas bills.
WATER VAPOR: A BY-PRODUCT OF UNVENTED ROOM HEATERS
Water vapor is a by-product of gas combustion. An
unvented room heater produces approximately one (1)
ounce (30ml) of water for every 1,000 BTU’s (.3KW’s) of
gas input per hour.
Unvented room heaters are recommended as supplemental
heat (a room) rather than a primary heat source (an entire
house). In most supplemental heat applications, the water
vapor does not create a problem. In most applications,
the water vapor enhances the low humidity atmosphere
experience during cold weather.
LOCAL CODES
Install and use heater with care. Follow all local
codes. In the absence of local codes, use the
latest edition of National Fuel Gas Code ANSZ223.1,
also known as NFPA 54*.
*Available from :
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
UNPACKING
1. Remove heater from carton.
2. Remove all protective packaging applied to
heater for shipment.
3. Check heater for any shipping damage. If heater
is damaged, promptly inform dealer where you
bought heater.
The following steps will help insure that water vapor
does not become a problem.
1. Be sure th e heater is sized properly for the
application, including ample combusion air and
circulation air.
2. If high humidity is experienced, a dehumidier may
be used to help lower the water vapor content of the air.
3. Do not use an unvented room heater as the primary
heat source.
3
FRESH AIR FOR
COMBUSTION AND
VENTILATION
WARN I N G : If the ar e a in
which the heater may be operated
do e s no t m ee t t he r e qu i re d
volume for indoor combustion air,
co m b ustion and ventilati o n air
shall be provided by one of the
methods described in the National
F u e l G a s C o d e , A N S I
Z 2 2 3 . 1 / N F P A 5 4 , t h e
International Fuel Gas Code, or
a p p l i c a b l e l o c a l c o d e s .
PROVIDING ADEQUATE
VENTILATION
All spaces in homes fall into one of
the three following ventilation classications:
1. Unusually Tight Construction
2. Unconned Space
3. Conned Space
The information on pages 4
through 6 will help you classify
your space and provide adequate
ventilation.
Unusually Tight Construction
The air that leaks around doors
and windows may provide enough
fresh air for combustion and ventilation.
However, in buildings of unusually
tight construction, you must provide
additional fresh air.
Unusually tight construction is
dened as construction where:
a. walls and ceilings exposed to
the outside atmosphere have a
continuous water vapor retarder
with a rating of one perm (6×10
kg per pa-sec-m2) or less with
openings gasketed or sealed and
b. weather stripping has been
added on open able win dows and
doors and
c. caulking or sealants are applied to
areas such as joints around window and door frames, between sole
plates and oors, between wallceiling joints, between wall panels, at
penetrations for plumbing, electrical,
and gas lines, and at other openings. If your home meets all of
the three criteria above, you must
provide additional fresh air. See
Ventilation Air From Outdoors,
pages 5 and 6. If your home does
not meet all of the three criteria
above, see Determining Fresh-Air
Flow for Heater Location, page 4, 5.
-11
Conned and
Unconned Space
Conned space is a space whose
volume is less than 50 cubic feet
per 1,000 Btu per hour (4.8 m3 per
kw) of the aggregate input rating
of all appliances installed in that
space and an unconned space
as a space whose volume is not
less than 50 cubic feet per 1,000
Btu per hour (4.8 m3 per kw) of
the aggregate input rating of all
appliances installed in that space.
Rooms communicating directly
with the space in which the
appliances are installed*, through
openings not furnished wit h
doors, are considered a part of
the unconned space.
This heater shall not be installed in a conned space or
unusually tight construction unless
pr ovisi ons are pr ovide d for
adequate combustion and
ventilation air.
* A d j oi n i n g r o om s a r e
communicating only if there
are doorless passageways or
ventilation grills between them.
DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION
Determining if you Have a Conned or Unconned Space*
Use this worksheet to determine if you have a conned or unconned space.
Space: Includes the room in which you will install heater plus any adjoining rooms with doorless passageways
or ventilation grills between the rooms.
1. Determine the volume of the space (length×width×height).
Length×Width×Height= cu.ft. (volume of space)
Example: Space size18ft.(length)×16ft.( width)×8ft. (ceiling height)=23040cu. ft. (volume of space)
If additional ventilation to adjoining room is supplied with grills or openings, add the volume of these
rooms to the total volume of the space.
2. Divide the space volume by 50 cubic feet to determine the maximum Btu/Hr the space can support.
(volume of space)÷50 cu. ft.=(Maximum Btu/Hr the space can support)
Example: 2304 cu. ft. (volume of space)÷50 cu.ft.=46.1 or 46.100(maximum Btu/Hr the space can support)
WARNING: If the area in which the heater may be operated is smaller than that dened as an
unconned space or if the building is of unusually tight construction, provide adequate combustion and
ventilation air by one of the methods described in the National Fuel Gas Coda, ANS Z223.1, Section 5.3
or applicable local codes.
4
3. Add the Btu/Hr of all fuel burning appliances in the space.
Vent-free heater Btu/Hr
Gas water heater* Btu/Hr
Gas furnace Btu/Hr
Vented gas heater Btu/Hr
Gas Fireplace logs Btu/Hr
Other gas appliances* + Btu/Hr
Total = Btu/Hr
*Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors and
vents to the outdoors.
4. Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used.
Btu/Hr (maximum the space can support)
Btu/Hr (actual amount of Btu/Hr used)
Example : 46,100 Btu/Hr(maximum the space can support)
50,000 Btu/Hr(actual amount of Btu/Hr used)
The space in the above example is a conned space because the actual Btu/Hr used is more than the
maximum Btu/Hr the space can support.
You must provide additional fresh air. Your options are as follows:
A. Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconned
space, remove door to adjoining room or add ventilation grills between rooms. See Ventilation Air From
Inside Building, page 5.
B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 6.
C. Install a lower Btu/Hr heater, if lower Btu/Hr size makes room unconned.
If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space is an
unconned space. You will need no additional fresh air ventilation.
Example:
Gas water heater 40,000 Btu/Hr
Vent free heater + 10,000 Btu/Hr
total = 50,000 Btu/Hr
AIR FOR COMBUSTION AND
VENTILATION
Continued
VENTILATION AIR
Ventilation Air From Inside Building :
This fresh air would come from an
adjoining unconfined space. When
ventilating to an adjoining unconned
space, you must provide two permanent
openings: one within 12” of the ceiling
and one within 12” of the oor on the
wall connecting the two spaces (see
options 1 and 2, Figure 2). You can
also remove door into adjoining room
(see option 3, Figure 2). Follow the Na-
tional Fuel Gas Code NFPA 54/ANS
Z223.1. Section 5.3, Air for Combustion and Ventilation for required size of
ventilation grills or ducts
WARNING: Rework worksheet ,
adding the space of the adjoining
unconned space. The combined spaces
must have enough fresh air to supply all
appliances in both spaces.
Figure 2 -Ventilation Air from Inside Building
5
VENTILATION AIR
Figure 3 -Ventilation Air from Outdoors
Ventilation Air From Outdoors
Pr o vide extr a fresh ai r by usi n g venti lation gril l s or duct s : You mus t pro vi d e t w o p e rm a n en t op e nin g s: o ne
within 12” of the ceiling and one within
12” of the oor.
Connect these items directly to the
outdoors or spaces open to the outdoors.
Th ese spa ces inc lude attics and cra w l
spaces. Follow the National Fuel Gas
Code NFPA 54/ANS Z223.1, Section 5.3.
Air for Combustion and Ventilation for
required size of ventilation grills or ducts.
IMPORTANT: Do not provide openings
for inlet or outlet air into attic if attic
has a thermostat-controlled power vent.
Heated air entering the attic will activate
the power vent.
INSTALLATION
NOTICE: This heater is
intended for use as supplemental
heat. Use this heater along with
your primary heating system.
Do not install this heater as
your primary heat source. If you
have a central heating system,
you may run system’s circulating blower while using heater.
This will help circulate the heat
throughout the house. In the
event of a power outage, you can
use this heater as your primary
heat source.
WARNING: A qualied
service person must install
heater. Follow all local codes.
CHECK GAS TYPE
Us e o nly natur al g as. If yo ur
gas supply is not natural, do
no t instal l heate r. Cal l dealer
wh e re yo u bo ught h e a ter f o r
proper type heater.
INSTALLATION NEEDS
Before installing heater, make sure
you have the items listed below.
piping (check local codes)
sealant (resistant to natural
gas)
equipment shutoff valve*
ground joint union
test gauge connection*
sediment trap
tee joint
pipe wrench
*A CSA/ A G A design- c e r t i fi e d
equipment shu toff val ve with
1/8” NPT tap is an acceptable alternative to test
gauge connection. Purchase the
optional CSA/AGA design certied
equipment shutoff valve from your
dealer. See Accessories, page 17.
LOCATING HEATER
This heater is designed to be
mounted on a wall.
For convenience and efficiency,
install heater
where there is easy access for
operation, inspection, and
service.
in coldest part of room.
CAUTION: If you install the
heater in a home garage
heater pilot and burner must
be at least 18 inches above
oor.
locate heater where moving
vehicle will not hit it.
WARNING: Never install
the heater
in a bathroom
in a recreational vehicle.
where curtains, furniture,
clothing, or other ammable
objects are less than 36 inches
from the front, top, or sides
of the heater.
as a replace insert.
in high trafc areas.
in windy or drafty areas.
CAUTION: This heater creates
warm air currents. These currents
move heat to wall surfaces
next to heater. Installing heater
next to vinyl or cloth wall coverings or operating heater where
impurities (such as tobacco smoke,
aromatic candles, cleaning uids,
oil or kerosene lamps, etc.) in the
air exist may discolor walls.
6
INSTALLATION
WA R NI N G: Ma i nt a in t h e
min i mu m cl e ar anc e s sho w n
i n F ig u r e 4 . I f yo u c a n,
provide greater clearances from
oor, ceiling, and joining wall.
Figure 4 -Mounting Clearances
As Viewed From Front Of Heater
FASTENING HEATER TO WALL
Mounting Bracket
The mounting bracket is located
on back panel of heater (see
Figure 5). It has been taped there
for shipp i n g . R e m o ve m o u n ti ng
bracket from back panel.
Removing Lower Front Panel Of
Heater
1. Remove two screws near
bottom corners of lower front
panel.
2. Pull bottom of lower front panel
forward, then down (see Figure
6).
Figure 6 - Removing Lower Front
Panel Of Heater
Methods For Attaching Mounting
Bracket To Wall
Only use last hole on each end
of mou nti ng bracket to attach
bracket to wall. Attach mounting
bracket to wall only in one of two ways:
1. Attaching to wall stud
2. Attaching to wall anchor
Attaching to Wall Stud: This method
provides the strongest hold. Insert
mounting screws through mounting bracket and into wall studs.
Attaching to Wall Anchor: This
method al l o w s you to attach
mounting bracket to hollow walls
(wall areas between studs) or to
solid walls (concrete or masonry).
Decide which method better
suits your needs. Either method
will provide a secure hold for the
mounting bracket.
Marking Screw Locations
1. Tape mounting bracket to wall
where heate r w ill be locat ed.
Make sure mounting bracket is
level.
WARNING: Maintain
minimum clearances shown in
Figure 8. If you can, provide
greater clearances from oor
and joining wall.
2. Mark screw locat i o n s on
wall. (see Figure 7)
Note: Only mark last hole on
each end of mounting bracket.
Insert mounting screws through
these holes only.
3. Remove tape and mounting
bracket from wall.
Figure 5 -Mounting Bracket
Location
Figure 7 - Mounting Bracket
Clearances
7
INSTALLATION
Attaching Mounting Bracket To
Wall
Note: Wall anchors, mounting
screws, and spacers are in
hardware package. The hardware
package is provided with heater.
Attaching to Wall Stud Method
For attaching mounting bracket to
wall studs
1. Drill holes at marked locations
using 9/64” drill bit.
2. Place mounting bracket onto
wall. Line up last hole on each
end of bracket with holes drilled
in wall.
3. Insert mounting screws through
bracket and into wall studs.
4. Tighten screws until mounting
bracket is rmly fastened to
wall studs.
Attaching to Wall Anchor Method
For attaching mounting bracket to
hollow walls (wall areas between
studs) or solid walls (concrete or
masonry)
1. Drill holes at marked locations
using 5/16” drill bit. For solid
walls (concrete or masonry),
drill at least 1” deep.
2. Fold wall anchor as shown in
Figure 8 below.
Figure 8 - Folding Anchor
3. Insert wall anchor (wings
rst) into hole. Tap anchor
ush to wall.
4. For thin walls (1/2” or less),
insert red key into wall
anchor. Push red key to
“pop” open anchor wings.
(see Figure 9).
Figure 9 - Popping Open Anchor
Wing For Thin Walls
5. Place mounting bracket onto
wall. Line up last hole on
each end of bracket with wall
anchors.
6. Insert mounting screws through
bracket and into wall anchors.
7. Tighten screws until mounting
bracket is rmly fastened to
wall.
IMPORTANT: Do not
hammer key! For thick walls
(over 1/2” thick) or solid walls,
do not pop open wings.
Placin g H eate r on Mount ing
Bracket
1. Locate two horizontal slots on
back pane l of h eate r (se e
Figure 10).
2. Place heater onto mounting
bracket. Slide horizontal slots
onto stand-out tabs on
mounting bracket.
Figure 10 - Mounting Heater Onto
Mounting Bracket
Installing Bottom Mounting
Screws
1. Locate bottom mounting hole. This
hole is near bottom on back
panel of heater (see Figure 11).
2. Mark screw locations on wall.
3. Remove heater from mounting
bracket.
Figure 11 - Installing Bottom
Mouting Screw
4. If installing bottom mounting
screw into hollow or solid wall,
install wall anchors. Follow
steps 1 through 4 under Attach
ing to Wall Anchor Method. If
installing bottom mounting screw
into wall stud, drill holes at
marked locations using 9/64”
drill bit.
5. Replace heater onto mounting
bracket.
6. Place spacers between bottom
mounting holes and wall
anchor or drilled hole.
7. Hold spacer in place with one
hand. With other hand, insert
mounting screw through bottom
mounting hole and spacer. Place
tip of screw in opening of wall
anchor or drilled hole.
8. Tighten screw until heater is rmly
secured to wall. Do not
over tighten.
Note: Do not replace lower front
panel at this time. Replace lower
front panel after making gas
connections and checking for
leaks (see page 9).
8
INSTALLATION
CONNECTING TO GAS SUPPLY
WARNING: A qualified
service person must connect
heater to gas supply. Follow all
local codes.
WARNING: This appliance
requires a 3/8” NPT (National
Pipe Thread) inlet connection
to the pressure regulator.
WARNING: Never connect heater private (non-utility)
gas well. This gas is commonly
known as well-head gas.
IMPORTANT: Check your gas
line pressure before connecting
heater to gas line. Gas line pressure must be no greater than 10.5
inches of water. If gas line pressure
is higher, heater regulator damage
could occur.
Figure 12 -Gas Connection
CAUTION: Use only new,
black iron or steel pipe. Internallytinned copper tubing may be used
in certain areas. Check your local
codes. Use pipe of large enough
diameter to allow proper gas volume to heater. If pipe is too small,
undue loss of pressure will occur.
Typical Inlet Pipe Diameters
All models up to 20,000 BTU’s use
3/8’’ or greater pipe;
All models 25,000 BTU’s and higher,
use 1/2” or greater pipe.
Installation must include an equipment shutoff valve, union, and
plugged 1/8” NPT tap. Locate NPT
tap within reach for test gauge
hook up. NPT tap must be upstream from heater (see Figure 12).
*A CSA/AGA design-certied equipment shutoff valve with 1/8” NPT
tap is an acceptable alternative to test gauge connection. Purchase
the optional CSA/AGA design-certied equipment shutoff valve from
your dealer. See Accessories, page 17.
IMPORTAN T: Inst all an equipment shutoff valve in an accessible location. The equipment shutoff
valve is for turning on or shutting
off the gas to the appliance.
Apply pipe joint sealant lightly to
male threads. This will prevent
excess sealant from going into
pipe. Excess sealant in pipe could
result in clogged heater valves.
CAUTION: Use pipe
joint sealant that is resistant to
natural gas.
Install sediment trap in supply line
as sho w n in F i gu re 12. Lo c a te
se d i m e n t trap where it is wi t h i n
reach for cleaning. Locate sediment
tr ap where tra pped matte r is not
likely to freeze. A sediment trap traps
moisture and contaminants. This
keeps them from going into heater
controls. If sediment trap is not installed
or is insta lled wrong, heater may
not run properly.
IMPORTANT: Hold press ure
reg u l ator w i th wr e nc h whe n
connecting it to gas piping and/or
ttings.
9
INSTALLATION
OPERATING YOUR HEATER
CHECKING GAS
CONNECTIONS
WARNING: Test all gas piping
and connections for leaks after
installing or servicing. Correct all
leaks at once.
WARNING: Never use an
open ame to check for a leak.
Apply a mixture of liquid soap
and water to all joints. Bubbles
forming show a leak. Correct all
leaks at once.
Pressure Testing Gas Supply
Piping System
Test Pressures In Excess Of
1/2 PSIG (3.5 K Pa)
1. Disconnect appliance with its
appliance main gas valve
(control valve) and equipment
shutoff valve from gas supply
piping system. Pressures in
excess of 1/2 psig will damage
heater regulator.
2. Cap off open end of gas pipe
where equipment shutoff valve
was connected.
3. Pressurize supply piping system by either using compressed
air or opening main gas valve
located on or near gas meter.
4. Check all joints of gas supply
piping system. Apply mixture of
liquid soap and water to gas
joints. Bubbles forming show
a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment
shutoff valve to gas supply. Check
reconnected ttings for leaks.
Test Pressures Equal To or
Less Than 1/2 PSIG (3.5 K Pa)
1. Close equipment shutoff valve
(see Figure 13).
2. Pressurize supply piping system
by either using compressed air
or opening main gas valve
located on or near gas meter.
3. Check all joints from gas meter
to equipment shutoff valve (see
Figure 14). Apply mixture of
liquid soap and water to gas joints.
Bubbles forming show a leak.
4. Correct all leaks at once.
Pressure Testing Heater Gas
Connections
1. Open equipment shutoff valve
(see Figure 13).
2. Open main gas valve located on
or near gas meter.
3. Make sure control knob of
heater is in the OFF position.
4. Check all joints from equipment
shutoff valve to control valve
(see Figure 14 ). Apply mixture of
liquid soap and water to gas
joints. Bubbles forming show
a leak.
5. Correct all leaks at once.
6. Light heater (see Operating
Heater, pages 10,11 an d 12)
Check the rest of the internal
joints for leaks.
7. Turn off heater (see To Turn Off
Gas to Appliance, pages 11 and
12) .
8. Replace lower front panel.
Figure 13-Equipment Shutoff Valve
Figure 14 -Checking Gas Joints
WARNI N G : Do no t
over tig h t e n g a s co n n e ct io ns .
FOR YOUR SAFETY
READ BEFORE LIGHTING
WARNING: If you do
not follow these instructions
exactly, a re or explosion
may result causing property damage personal injury or loss of life.
A. When lighting the pilot, follow
these instructions exactly.
B. BEFORE LIGHTING smell all
around the appliance area for
gas. Be sure to smell next to
the oor because some gas is
heavier than air and will settle
on the oor .
WHAT TO DO IF YOU SMELL GAS
Do not try to light any appliance.
Do not touch any electric switch;
do not use any phone in your
building.
Immediately call your gas
supplier from a neighbor’s
phone. Follow the gas
supplier’s instructions.
If you cannot reach your gas
supplier, call the re department.
C. Use only your hand to push in
or turn the gas control knob.
Never use tools. If the knob
will not push in or turn by
hand, don’t try to repair it, call
a qualied service technician or
gas supplier. Force or attempted
repair may result in a fire or
explosion.
D. Do not use this appliance if any
pa r t has b een u n der w a ter.
Imm ediatel y call a qua lified
service technician to inspect
the appliance and to replace
any part of the control system
and any gas control which has
been under water.
10
OPERATING YOUR HEATER
Manual Control Models
LIGHTING
INSTRUCTIONS
1. STO P ! Re a d the saf e t y
infor mation on the side of
heater.
2. Check th at g as s upply to
heater is on.
3. Push in gas contro l knob
slightly and turn clockwise
to
the OFF position (see Figures
15 &16).
4. Wait ve (5) minutes to clear
out any air. Then smell for
gas, including near the oor.
If you smell gas, STOP!
Follow “B” in the safety
information on the side of the
heater. If you do not smell
gas, go to the next step.
5. Push in gas control knob
slightly and turn counter clockwise to“PILOT/IGN”
and depress for ve (5) seconds
NOTE: The rst time that the
heater is operated after connecting the gas supply , the control
knob should be depre ssed for
about thirty (30) seconds. This will
allow air to bleed from the gas
system.
6. With control knob pressed in,
push down and release the
ignitor button. This will light
pilot. If needed, keep pressing
ignitor button until pilot lights.
7. Keep control knob depressed
for ten (10) s e conds afte r
lighting pilot. If pilot goes out,
repeat steps 5, 6 and 7.
8. To select the desired heating
level, partially press down the
control knob slightly and rotate
counterclockwise . Release the
downward pressure on the knob
while continuing to turn until the
knob locks at the desired setting
p o si t io n . Do n o t op e ra t e
between locked positions.
TO SELECT
HEATING LEVEL
WARNING: When running
he a t er, set co n tro l kn o b a t
ON, L O W, or H I G H l o c ked
positions(see Figures 17 & 18).
Never set control knob between
locked positions. Poor combustion
and higher levels of carbon
monoxide may result.
CAUTION: Do not try to
adjust heating levels by using
the equipment shutoff valve.
Slightly press in control knob and
turn counterclockwise to
the ON, LOW or HIGH positions (see Figures 17 & 18).
Figure 15 - Control Knob In The
OFF Position (0696542 and
1096542)
Figure 16 - Pilot
0696542
Figure 17 - Burner Patterns
1096542
Figure 18 - Burner Patterns
TO TURN OFF
GAS TO APPLIANCE
Shutting Off Heater
1. Turn control knob clockwise
to the OFF position.
2. Turn off all electric power to
the appliance if service is to
be performed.
Shutting Off Burner Only (Pilot
Stays Lit)
Turn control knob clockwise
to the PILOT/IGN position.
MANUAL LIGHTING
PROCEDURE
1. Remove lower front panel (see
Figure 6 page 7)
2. Follow steps 1 through 5
under Lighting Instructions.
3. With control knob pressed in,
strike match. Hold match to
pilot until pilot lights.
4. Keep control knob pressed in
for 30 seconds after lighting
pilot. After 30 seconds, release
control knob.Follow step 8
under Lighting Instructions.
5. Replace lower front panel.
11
OPERATING HEATER
Continued
MANUAL LIGHTING
PROCEDURE
1. Remove lower front panel (see
Figure 7 page 7).
2. Follow steps through 5 under
Lighting Instructions on page12.
3. With control knob pressed in,
strike match. Hold match to
pilot until pilot lights.
4. Keep control knob pressed in
for 30 seconds after lighting pilot.
After 30 seconds, release control
knob. Follow step 8 under Lighting
Instuctions on page 11.
5. Replace lower front panel.
INSPECTING BURNER
Check pi lot flame p attern and
burner ame pattern often.
PILOT FLAME PATTERN
Figure 19 shows a correct pilot
ame pattern. Figure 20 shows an
incorrect pilot ame pattern. The
incorrect pilot ame is not touching
thermocouple. This will cause the
thermocouple to cool. When the
thermocouple cools, the heater will
shut down. If pilot ame pattern is
incorrect, as shown in Figure 20.
turn heater off (see To Turn Off
Gas to Appliance. Page 11
see Troubleshooting. Pages 13
through 15.
BURNER FLAME PATTERN
Figure 21 shows a correct burner
ame pattern. Figure 22 shows an
incorrect burner ame pattern.
If burner ame pattern is incorrect, as
shown in Figure 22
turn heater off (see To Turn Off Gas
to Appliance page 11)
see Troubleshooting, (pages 13
through 15)
Figure 22 - Correct Burner Flame
Pattern
Figure 23 - Incorrect Burner Flame
Pattern
ODS/PILOT AND BURNER
Use a vacuum cleaner, pressur-
ized air, or a small, soft bristled
brush to clean.
CLEANING BURNER
PILOT AIR INLET HOLE
We recommend that you clean the
unit every 2,500 hours of operation
or every three months.
We also recommend that you keep
the burner tube and pilot assembly
clean and free of dust and dirt. To
clean these parts we recommend
using compressed air no greater
than 30 PSl. Your local computer
store, hardware store or home center may carry compressed air in a
can. You can use a vacuum cleaner
in the blow position. If using compressed air in a can, please follow
the directions on the can. If you don’t
follow directions on the can, you
could damage the pilot assembly.
1. Shut off the unit, including the
pilot. Allow the unit to cool for
at least thirty minutes.
2. Inspect burner, and pilot for dust
and dirt.
3. Blow air through the ports/slots
and holes in the bumer.
Also clean the pilot assembly. A yellow tip on the pilot ame indicates
dust and dirt in the pilot assembly.
There is a small pilot air inlet hole
about two inches from where the pilot
ame comes out of the pilot assembly (see Figure 24). With the unit off
, lightly blow air through the air inlet
hole. You may blow through a drinking
straw if compressed air is not available.
Figure 19 - Correct Pilot Flame
Pattern
Figure 20 - Incorrect Pilot Flame
Pattern
CLEANING AND
MAINTENANCE
WARNING: turn off heater
and let cool before cleaning or
servicing.
CAUTION: you must keep con-
trol areas, burner, and circulating
air passageways of heater clean.
Inspect these areas of heater before
each use. Have heater inspected
yearly by a qualied service person. Heater may need more frequent
cleaning due to excessive lint from
carpeting, bedding material, pet hair,
etc.
12
Figure 24 - Pilot Air Inlet Hole
CABINET
Air Passageways
Use a vacuum cleaner or
pressurized air to clean.
Exterior
Use a soft cloth dampened with
a mild soap and water mixture.
Wipe the cabinet to remove dust.
TROUBLESHOOTING
Note : All troubleshooting
items are listed in order of
operation.
OBSERVED PROBLEM
When ignitor button is pressed and
control knob is pressed in and turned
to the PILOT position, there is no
spark at ODS/pilot.
When ignitor button is pressed and
control knob is press in and turned to
the PILOT position, there is a spark
at ODS/pilot but no ignition.
WARNING: Only a qualied
service person should service and
repair heater.
POSSIBLE CAUSE
1. Ignitor electrode is positioned
wrong.
2. Ignitor electrode is broken.
3. Ignitor electrode is not connected
to ignitor cable.
4. Ignitor cable is pinched or wet.
5. Broken ignitor cable.
6. Bad piezo ignitor.
1. Gas supply turned off or equipment
shutoff valve is closed.
2. Control knob not fully pressed in
while pressing ignitor button.
3. Air in gas lines when installed.
4. ODS/pilot is clogged.
5. Gas regulator setting is not correct.
6. Control knob not in PILOT position.
CAUTION: Never use a
wire, needle, or similar object to
clean ODS/pilot. This can damage
ODS/pilot unit.
REMEDY
1. Replace ignitor.
2. Replace ignitor.
3. Reconnect ignitor cable.
4. Free ignitor cable if pinched by
any metal or tubing. Keep
ignitor cable dry.
5. Replace ignitor cable.
6. Replace piezo ignitor.
1. Turn on gas supply of open
equipment shutoff valve.
2. Fully press in control knob
while pressing ignitor button.
3. Continue holding down control
knob. Repeat igniting operation
until air is removed.
4. Clean ODS/pilot (see Cleaning and
Maintenance, Page 12) or re-
place ODS/pilot assembly.
5. Replace gas regulator.
6. Turn control knob to PILOT position.
ODS/pilot lights but ame goes
out when control knob is released.
1. Control knob is not fully pressed in.
2. Control knob is not pressed in
long enough.
3. Equipment shutoff valve is not
fully open.
4. Thermocouple connection is
loose at control valve.
5 Pilot ame is not touching
thermocouple, This allows
thermocouple to cool, causing
pilot ame to go out. This
problem could be caused by
one or both of the following:
A) Low gas pressure
B) Dirty or partially clogged
ODS/ pilot
6. Thermocouple damaged.
7. Control valve damaged.
13
1. Press in control knob fully.
2. After ODS/pilot lights, keep control
knob pressed in 30 seconds.
3. Fully open equipment shutoff valve.
4. Hand tighten until snug, then
tighten 1/4 turn more.
5. A) Co ntact loc al gas company.
B) Clean ODS/pilot (see Cleaning
and Maintenance, Page 12) or
replace ODS/pilot assembly.
6. Replace thermocouple.
7. Contact Dealer or Williams
Furnace.
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
Bu r n er ( s )d o e s n o t l i ght a ft e r
ODS/pilot is lit.
Delayed ignition of burner(s).
Burner backring during combustion.
Burner plaque(s) does not glow.
POSSIBLE CAUSE
1. Burner orice is clogged.
2. Burner orice diameter is too small.
3. Inlet gas pressure is too low.
1. Manifold pressure is too low.
2. Burner orice is clogged.
1. Burner orifice is clogged or
damaged.
2. Burner is damaged.
3. Gas regulator is defective.
1. Plaque damaged.
2. Inlet gas pressure is too low.
3. Control knob set between locked
positions.
REMEDY
1. Clean burner orice (see Cleaning
and Maintenance, Page 12) or
replace burner orice.
2. Replace burner orice.
3. Contact local natural gas company.
1. C on t ac t lo c a l g as c om p an y.
2. Clean burner (see Cleaning and
Maintenance, Page 12) or replace
burner orice.
1. Clean burner orice (see Cleaning
and Maint enan ce, Page 12) or
replace.
2. Contact Dealer or Williams
Furnace.
3. Replace gas regulator.
1. Replace burner.
2. Contact local gas company.
3. Turn control knob until it locks at
desired setting.
Slight smoke or odor during
initial operation.
Heater produces clicking/ticking
noise just after burner is lit or
shut off.
White po wder resid ue formin g
within burner box or on adjacent
walls or furniture.
1. Residues from manufacturing
processes.
1. Metal is expanding while heating
or contracting while cooling.
1. When heated, the vapors from
furniture polish, wax, carpet
cleaners, etc. turn into white
powder residue.
1. Problem will stop after a few hours
of operation.
1. T hi s i s c o mm o n w i th m os t
heaters. If noise is excessive,
contact qualied service person.
1. Turn heater off when using
furniture polish, wax, carpet
cleaner, or similar products.
14
TROUBLESHOOTING
Continued
WARNING: If you smell gas :
Shut off gas supply.
Do not try to light any appliance.
Do not touch any electrical switch; do not use any phone in your building.
Immediately call your gas supplier from a neighbor’s phone. Follow the gas
supplier’s instructions.
If you cannot reach your gas supplier, call the re department.
IMPORTANT: Operating heater where impurities in air exist may create odors. Cleaning
supplies, paint, paint remover, cigarette smoke, cements and glues, new carpet or
textiles, etc., create fumes. These fumes may mix with combustion air and create odors.
OBSERVED PROBLEM
Heater produces unwanted odors.
Heater shuts off in use (ODS operates).
Gas odor even when control knob is
in OFF position.
Gas odor exists during combustion.
POSSIBLE CAUSE
1. Heater is burning vapors from
paint, hair spray, glues, etc.
(See IMPORTANT statement
above).
2. Ga s l ea k . Se e W a rn i ng
Statement at top of page.
1. Not enough fresh air is available.
2. Low line pressure.
3. ODS/pilot is partially clogged.
1. Gas leak. See War ning
Statement at top of page.
2. Control valve is defective.
1. Foreign matter between control
valve and burner.
2. Gas leak. See Warning
Statement at top of page.
REMEDY
1. Ventilate room. Stop using odor
causing products while heater
is running.
2. Locate and correct all leaks(see
Checking Gas Connections,
page 10).
1. Open window and/or door for
ventilation.
2. Conta c t lo c a l ga s co m p a ny.
3. Clean ODS/pilot (see Cleaning
page 12).
1. Locate and correct all leak s(see
Checking Gas Connections,
page 10).
2. Contact Dealer or Williams
Furnace.
1. Take apart gas tubing and
remove foreign matter.
2. Locate and correct all leaks
(see Checking Gas Connections,
page 10).
Moisture/condensation noticed on
windows.
1. Not enough combustion/ventilation
air.
15
1. Refer to Air for Combustion and
Ventilation Requirements, page
4.
SPECIFICATIONS
0696542
Btu(available)
Gas Type
Ignition
Pressure Regulator setting
Inlet Gas Pressure* (inches of water)
Maximum
Minimum
Dimensions, Inches (HxWxD)
Heater
Carton
Weight (pounds)
Heater
Shipping
Note: Dimensions listed are outer most points on the heater (includes control knobs and grill).
* For purposes of input adjustment.
19-1/8×14-1/8×6-3/8
6,000
Natural Only
Piezo
6” W.C.
10.5”
7”
22×16-3/4×8-1/8
12
15
TECHNICAL SERVICE
You may have further questions about installation, operation,
or troubleshooting. If so, contact
Williams Furnace at (909)825-0993.
The information is listed on the front
of manual.
SERVICE HINTS
When Gas Pressure Is Too
Low
Pilot will not stay lit
Burner will have delayed ignition
Heater will not produce specied
heat
EQUIPMENT SHUTOFF VALVE
For all models. Equipment shutoff
valve with 1/8” NPT tap.
When Gas Quality Is Bad
Pilot will not stay lit
Burner will produce ames and
soot
Heater will backre when lit
You may feel your gas pressure is
too low or the gas quality is poor.
If so, contact your local natural gas
supplier.
ACCESSORIES
Purchase these heater accessories
from your local dealer. If they
cannot supply these accessories,
contact Williams Furnace for information. You can also write to the
address listed on the front of this
manual.
FLOOR MOUNTING STAND
M o d el s 0 6 96 5 4 2 , 1 0 9 6 5 4 2
For locating heater on the oor
away from a wall. Complete installation instructions provided with oor
mounting stand.
1096542
5,500/10,000
Natural Only
Piezo
6” W.C.
10.5”
7”
19-1/8×14-1/8×6-3/8
22×16-3/4×8-1/8
13
16
REPLACEMENT PARTS
Note: Use only original replacement
parts. This will protect your warranty
coverage for parts replaced under
warranty.
PARTS UNDER WARRANTY
Contact authorized dealer from
whom you purchased this product.
If they are unable to supply original
replacement part(s), call the number
on the front of this manual. When
contacting your dealer or Williams
Furnace, have ready:
your name
your address
model and serial numbers of
your heater
how heater was malfunctioning
type of gas used (propane/LP or
natural gas)
purchase date
warranty card
Usually, we will ask you to return the
defective part to the factory.
PARTS NOT UNDER
WARRANTY
Contact authorized dealers of this
product. If they can’t supply original
replacement part(s), contact Williams
Furnace at (909)825-0993.
16
ILLUSTRATED PARTS
BREAKDOWN
0696542
17
PARTS LIST
0696542
This list contains replaceable parts for your heater. When ordering replacement parts,
follow the instructions listed under Replacement Parts on page 16 of this manual.
KEY
NO.
1
2
3
4
5
5-1
5-2
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
PART
NUMBER
MB10008
MB09003
ML006-02
MB19007
ND1206x600x7
ND0803-6
ND0807
ML026-03
ML069-02
NV2020-12
ML073-02
ML029-01
MB40033
MB40052
MB40053
ML090-01
MB16002
NRV81FI-6
ML129-02
ML079-01
ML119-01
MB29003W
MB060-02
ML083-03
ML105-05
DESCRIPTION
Cabinet Assembly
Lower Front Panel Assembly
Reector Unit
Burner Assembly
ODS Pilot Assembly
Thermocouple
Ignitor Electrode
ODS Mounting Bracket
Self Tapping Screws
Control Valve
Ignitor Line
Control Valve Fixed Nut
Main Inlet Tube Assembly
ODS Gas Line Assembly
Burner Gas Line Assembly
Injector
Control Knob Assembly
Pressure Regulator
Regulator Mounting Bracket
Self Locking Screws
Pressure Tap
Grill Guard
Mounting Bracket Assembly
lgnitor Assembly
ODS Upper Deector
QTY
1
1
1
1
1
1
1
1
10
1
1
1
1
1
1
1
1
1
1
4
1
1
1
1
1
MB28001
ML070-31W
PARTS AVAILABLE NOT SHOWN
Assembly Hardware
CSA/AGA Label
18
1
1
ILLUSTRATED PARTS
BREAKDOWN
1096542
19
PARTS LIST
1096542
This list contains replaceable parts for your heater. When ordering replacement parts,
follow the instructions listed under Replacement Parts on page 16 of this manual.
KEY
NO.
5-1
5-2
PART
NUMBER
1
MB10008
2
MB09003
3
ML006-01
4
MB19005
5
ND1206x600x7
ND0803-6
ND0807
6
ML026-02
7
ML069-02
8
NV2020-13
9
ML073-02
10
ML029-01
11
MB40033
12
MB40034
13
MB40035
14
MB40036
15
ML090-03
16
MB16002
17
NRV81FI-6
18
ML129-02
19
ML079-01
20
ML119-01
21
MB29003W
22
MB060-02
23
ML083-03
24
ML105-05
DESCRIPTION
Cabinet Assembly
Lower Front Panel Assembly
Reector Unit
Burner Assembly
ODS pilot Assembly
Thermocouple
Ignitor Electrode
ODS Mounting Bracket
Self Tapping Screws
Control Valve
Ignitor line
Control Valve Fixed Nut
Main Inlet Tube Assembly
ODS Gas Line Assembly
Burner Gas Line Assembly A
Burner Gas Line Assembly B
Injector
Control Knob Assembly
Pressure Regulator
Regulator Mounting Bracket
Self Locking Screws
Pressure Tap
Grill Guard
Mounting Bracket Assembly
lgnitor Assembly
ODS Upper Deector
QTY
1
1
1
1
1
1
1
1
10
1
1
1
1
1
1
1
2
1
1
1
4
1
1
1
1
1
MB28001
ML070-01W
PARTS AVAILABLE NOT SHOWN
Assembly Hardware
CSA/AGA Label
20
1
1
WARRANTY INFORMATION
Keep This Warranty
IMPORTANT: We urge you to ll your warranty registration card within TEN(10) days of date of installation, complete
with the entire serial number which can be found on the rating plate. Retain this portion of the card for your record.
Always specify model and serial numbers when communicating with customer service.
We reserve the right to amend these specications at any time without notice. The only warranty applicable is our stan-
dard written warranty. We make no other warranty, expressed or implied.
LIMITED WARRANTY:
Williams Furnace Co. warrants this product to be free from defects in materials and components for ONE (1) year from
the date of rst purchase, provided that the product has been properly installed, operated and maintained in accordance
with all applicable instructions, to make a claim under this warranty, the Bill of Sale or cancelled check must be pre-
sented.
RESPONSIBILITY OF OWNER
This warranty is extended only to the original retail purchaser. This warranty covers the cost of part(s) required to
restore this heater to proper operating condition. Warranty part(s) MUST be obtained through authorized dealers of this
product and/or Williams Furnace Co. who will provide original factory replacement parts. Failure to use original factory
replacement parts voids this warranty. The heater MUST be installed by a qualied installer in accordance with all local
codes and instructions furnished with the unit.
WHAT IS NOT COVERED
This warranty does not apply to parts that are not in original condition because of normal wear and tear or parts that
fail or become damaged as a result of misuse, accidents, lack of proper maintenance or defects caused by improper
installation. Travel, diagnostic cost, labor, transportation and any and all such other costs related to repairing a defective
heater will be the responsibility of the owner.
TO THE FULL EXTENT ALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALE OF THE
PRODUCT, THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED WARRANTIES AND LIM-
ITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES. INCLUDING WARRANTIES OF MERCHANTABIL-
ITY AND FITNESS FOR A PARTICULAR PURPOSE TO ONE (1) YEAR ON ALL COMPONENTS FROM THE DATE
OF FIRST PURCHASE. Williams Furnace Co.’s LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF
THE PRODUCT AND Williams Furnace Co. SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVER
INCLUDING INDIRECT. INCIDENTAL OR CONSEQUENTIAL DAMAGES.
Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation of accidental or
consequential damages, the above limitation on implied warranties, or exclusion or limitation on damages may not apply
to you.
This warranty gives you specic legal right, and you may also have other rights that vary from state to state.
21
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