INFRARED VENT-FREE PROPANE/LP GAS HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
FB-3B
FBS-3C
FB-5B
FBS-5C
WARNING: Improper instal-
lation,adjustment,alteration,
service, or maintenance can
causeinjuryorpropertydam-
age. Refer to this manual for
correct installation and op-
erationalprocedures.Foras-
sistance or additional infor-
mationconsultaqualifiedin-
staller,serviceagency,orthe
gas supplier.
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
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use
any phone in your building.
WARNING: This is an
unvented gas-fired heater.
It uses air (oxygen) from the
room in which it is installed.
Provisions for adequate
combustion and ventilation
air must be provided. Refer
to Air For Combustion and
Ventilation section on page
4 of this manual.
• 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
fire department.
— Installation and service must be performed by
a qualified installer, service agency, or the
gas supplier.
Thisappliancemaybeinstalledinanaftermarket*, permanentlylocated, manufac-
tured (mobile) home, where not prohibited by local codes.
Thisapplianceisonlyforusewiththetypeofgasindicatedontheratingplate. This
appliance is not convertible for use with other gases.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
Save this manual for future reference.
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OWNER’S MANUAL
PRODUCT
IDENTIFICATION
PRODUCT
FEATURES
Control Knob
SAFETY DEVICE
This heater has a pilot with an Oxygen
Depletion Sensing (ODS) safety shutoff
system. The ODS/pilot is a required feature
for vent-free room heaters. The ODS/pilot
shuts off the heater if there is not enough
fresh air.
PIEZO IGNITION SYSTEM
Grill
Guard
This heater has a piezo ignitor. This system
requires no matches, batteries, or other
sources to light heater.
Burners
THERMOSTATIC HEAT
CONTROL ON THERMOSTAT
MODELS FBS-3C AND FBS-5C
Front
Panel
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.
Heater
Cabinet
Figure 1 - Vent-Free Propane/LP Gas Heater (Model FB-5B Shown)
LOCAL CODES
UNPACKING
Install and use heater with care. Follow all 1. Remove heater from carton.
localcodes.Intheabsenceoflocalcodes,use
2. Remove all protective packaging ap-
plied to heater for shipment.
the latest edition of National Fuel Gas Code
ANS Z223.1, also known as NFPA 54*.
3. Check heater for any shipping damage.
If heater is damaged, promptly inform
dealer where you bought heater.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
107297
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INFRARED PROPANE/LP GAS HEATER
Confined and Unconfined Space
PRODUCING ADEQUATE
VENTILATION
FRESH AIR FOR
COMBUSTION AND
VENTILATION
The National Fuel Gas Code ANS Z223.1
defines a confined space as a space whose
volume is less than 50 cubic feet per 1,000
Btu per hour (4.8 m3 per kw) of the aggre-
gate input rating of all appliances installed
in that space and an unconfined 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
whichtheappliancesareinstalled*,through
openings not furnished with doors, are con-
sidered a part of the unconfined space.
The following are excerpts from National
Fuel Gas Code, NFPA 54/ANS Z223.1, Sec-
tion5.3, AirforCombustionandVentilation.
WARNING: This heater shall
notbeinstalledinaconfinedspace
or unusually tight construction
unless provisions are provided
foradequatecombustionandven-
tilation air. Read the following in-
structions to insure proper fresh
air for this and other fuel-burning
appliances in your home.
All spaces in homes fall into one of the three
following ventilation classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The information on pages 4 through 6 will
help you classify your space and provide
adequate ventilation.
Today’s homes are built more energy effi-
cient than ever. New materials, increased
insulation, and new construction methods
helpreduceheatlossinhomes.Homeowners
weather strip and caulk around windows and
doorstokeepthecoldairoutandthewarmair
in. During heating months, home owners
want their homes as airtight as possible.
This heater shall not be installed in a con-
fined space or unusually tight construction
unless provisions are provided for adequate
combustion and ventilation air.
Unusually Tight Construction
The air that leaks around doors and win-
dows may provide enough fresh air for
combustion and ventilation. However, in
buildings of unusually tight construction,
you must provide additional fresh air.
* Adjoining rooms are communicating only
iftherearedoorlesspassagewaysorventila-
tion grills between them.
Unusually tight construction is de-
fined as construction where:
While it is good to make your home energy
efficient, your home needs to breathe. Fresh
air must enter your home. All fuel-burning
appliances need fresh air for proper com-
bustion and ventilation.
a. walls and ceilings exposed to the
outside atmosphere have a con-
tinuous water vapor retarder with
a rating of one perm (6 x 10-11 kg
per pa-sec-m2) or less with open-
ings gasketed or sealed and
Exhaustfans, fireplaces, clothesdryers, and
fuel burning appliances draw air from the
house to operate. You must provide ad-
equate fresh air for these appliances. This
will insure proper venting of vented fuel-
burning appliances.
b. weather stripping has been
added on openable windows and
doors and
c. caulking or sealants are applied
to areas such as joints around
window and door frames, be-
tween sole plates and floors, be-
tween wall-ceiling joints, be-
tween wall panels, at penetra-
tions for plumbing, electrical, and
gas lines, and at other openings.
If your home meets all of the three
criteria above, you must provide ad-
ditional fresh air. See Ventilation Air
From Outdoors, page 6.
If your home does not meet all of the
threecriteriaabove,seeDetermining
Fresh-Air Flow for Heater Location,
page 5.
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OWNER’S MANUAL
FRESH AIR FOR
COMBUSTION AND
VENTILATION
Continued
DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION
Determining if You Have a Confined or Unconfined Space
Use this worksheet to determine if you have a confined or unconfined space.
Space:Includestheroominwhichyouwillinstallheaterplusanyadjoiningroomswithdoorlesspassagewaysorventilationgrillsbetween
the rooms.
1. Determine the volume of the space (length x width x height).
Length x Width x Height = ____________________ cu. ft. (volume of space)
Example: Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) = 2560 cu. 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: 2560 cu. ft. (volume of space) ÷ 50 cu. ft. = 51.2 or 51,200 (maximum Btu/Hr the space can support)
3. Add the Btu/Hr of all fuel burning appliances in the space.
Vent-free heater
Gas water heater*
Gas furnace
___________________ Btu/Hr
___________________ Btu/Hr
___________________ Btu/Hr
___________________ Btu/Hr
___________________ Btu/Hr
Example:
Gas water heater
40,000 Btu/Hr
Vented gas heater
Gas fireplace logs
Vent-free heater + 18,000 Btu/Hr
Total 58,000 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: 51,200 Btu/Hr (maximum the space can support)
58,000 Btu/Hr (actual amount of Btu/Hr used)
The space in the above example is a confined 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 unconfined space, remove door to adjoin-
ing room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 6.
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 unconfined.
If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space is an unconfined space. You will need no
additional fresh air ventilation.
WARNING: If the area in which the heater may be operated is smaller than that defined as an unconfined 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 Code, ANS Z223.1, Section 5.3 or applicable local codes.
Continued
107297
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INFRARED PROPANE/LP GAS HEATER
FRESH AIR FOR
COMBUSTION AND
VENTILATION
12"
Continued
VENTILATION AIR
Ventilation Air From Inside
Building
Ventilation Grills
Into Adjoining Room,
Ventilation
Grills
into Adjoining
Room,
Option 2
Or
Thisfreshairwouldcomefromanadjoining
unconfined space. When ventilating to an
adjoining unconfined space, you must pro-
vide two permanent openings: one within
12" of the ceiling and one within 12" of the
floor on the wall connecting the two spaces
(see options 1 and 2, Figure 2). You can also
remove door into adjoining room (see op-
tion 3, Figure 2). 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.
Remove
Door into
Adjoining
Room,
Option 1
Option 3
12"
WARNING: Rework work-
sheet, adding the space of the
adjoining unconfined space. The
combined spaces must have
enough fresh air to supply all
appliances in both spaces.
Figure 2 - Ventilation Air from Inside Building
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two per-
manent openings: one within 12" of the
ceiling and one within 12" of the floor.
Connect these items directly to the outdoors
Ventilated
Outlet
Attic
Air
orspacesopentotheoutdoors.Thesespaces Outlet
Air
include attics and crawl spaces. Follow the
National Fuel Gas Code NFPA 54/ANS
Z223.1,Section5.3,AirforCombustionand
Ventilation for required size of ventilation
grills or ducts.
To Attic
To
Crawl
Space
IMPORTANT: Do not provide openings for
inlet or outlet air into attic if attic has a
thermostat-controlledpowervent.Heatedair
enteringtheatticwillactivatethepowervent.
Inlet
Air
Ventilated
Crawl Space
Inlet Air
Figure 3 - Ventilation Air from Outdoors
107297
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OWNER’S MANUAL
Forconvenienceandefficiency,installheater
INSTALLATION
WARNING:Maintainthemini-
• where there is easy access for operation,
inspection, and service
mumclearancesshowninFigure
4.Ifyoucan,providegreaterclear-
ances from floor, ceiling, and
joining wall.
NOTICE: This heater is intended
foruseassupplementalheat.Use
this heater along with your pri-
mary heating system. Do not in-
stall this heater as your primary
heat source. If you have a central
heating system, you may run
system’scirculatingblowerwhile
usingheater.Thiswillhelpcircu-
late the heat throughout the
house. In the event of a power
outage, you can use this heater
as your primary heat source.
• in coldest part of room
An optional fan kit is available from your
dealer. See Accessories, page 19. If plan-
ning to use fan, locate heater near an
electrical outlet.
You can locate heater on floor, away from a
wall. An optional floor mounting stand is
needed. Purchase the floor mounting stand
from your dealer. See Accessories, page 19.
CEILING
WARNING: Never install the
heater
36"
Minimum
• in a bedroom or bathroom
• in a recreational vehicle
• where curtains, furniture,
clothing, or other flammable
objectsarelessthan36inches
from the front, top, or sides of
the heater
8"
Minimum
From
Sides Of
Heater
WARNING: A qualified ser-
vice person must install heater.
Follow all local codes.
Right
Side
Left
Side
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
CHECK GAS TYPE
Useonlypropane/LPgas.Ifyourgassupply
is not propane/LP, do not install heater. Call
dealer where you bought heater for proper
type heater.
2"
Minimum to
Top Surface
of Carpeting,
Tile or Other
Combustible
Material
FLOOR
CAUTION: If you install the
heater in a home garage
• heater pilot and burner must
be at least 18 inches above
floor
INSTALLATION ITEMS
Figure4-MountingClearancesAsViewed
From Front of Heater
Beforeinstallingheater,makesureyouhave
the items listed below.
• locateheaterwheremovingve-
hicle will not hit it
INSTALLING THERMOSTAT
SENSING BULB -
For T-Stat Models Only
• external regulator (supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• ground joint union
CAUTION: This heater cre-
ates warm air currents. These
currents move heat to wall sur-
faces next to heater. Installing
heater next to vinyl or cloth wall
coverings or operating heater
where impurities (such as to-
bacco smoke, aromatic candles,
cleaning fluids, oil or kerosene
lamps, etc.) in the air exist, may
discolor walls.
Remove clip and bulb from shipping loca-
tion. Placeclipandbulbintooperationloca-
tion (see Figure 5)
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
* A CSA/AGA design-certified equipment
shutoff valve with 1/8" NPT tap is an ac-
ceptable alternative to test gauge connec-
tion. Purchase the optional CSA/AGA de-
sign-certifiedequipmentshutoffvalvefrom
your dealer. See Accessories, page 19.
IMPORTANT: Vent-free heaters add mois-
ture to the air. Although this is beneficial,
installing heater in rooms without enough
ventilationairmaycausemildewtoformfrom
too much moisture. See Fresh-Air for Com-
bustion and Ventilation, pages 4 through 6.
Figure 5 - Moving Thermostat Sensing
Bulb
LOCATING HEATER
This heater is designed to be mounted on
a wall.
Continued
107297
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INFRARED PROPANE/LP GAS HEATER
Removing Front Panel Of Heater Marking Screw Locations
INSTALLATION
Models FB-3B and FB-5B
1. Remove two screws near bottom cor-
ners of lower front panel.
1. Tape mounting bracket to wall where
heater will be located. Make sure
mounting bracket is level.
Continued
INSTALLING HEATER TO
WALL
2. Pull bottom of lower front panel for-
ward, then down (see Figure 8).
WARNING:Maintainminimum
clearances shown in Figure 8. If
you can, provide greater clear-
ancesfromfloorandjoiningwall.
Mounting Bracket
The mounting bracket is located on back
panel of heater. It has been taped there for
shipping. Remove mounting bracket from
back panel.
2. Mark screw locations on wall (see Fig-
ure 9).
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.
Mounting
Bracket
10 1
Min.
/4"
17 3
/8"
Figure 6 - Mounting Bracket Location
Figure8-RemovingFrontPanelofHeater
(Model FB-5B Shown)
17 1
Min.
/2"
Removing Front Panel Of Heater
Models FBS-3C and FBS-5C
Only Insert Mounting
Screws Through Last
Hole On Each End
AjdoingWal
1. Remove two screws near bottom cor-
ners of front panel.
Methods For Attaching
Mounting Bracket To Wall
2. Lift straight up on grill guard until it stops.
Grill guard will slide up about 1/4".
Floor
Only use last hole on each end of mounting
bracket to attach bracket to wall. These two
holes are 16 inches apart from their centers.
Attach mounting bracket to wall in one of
two ways
3. Pull bottom of front panel forward, then
down (see Figure 7).
Models FB-5B, FBS-5B
6 1/2
Min.
"
17 3/8
"
1. Attaching to wall stud
2. Attaching to wall anchor
Only Insert Mounting
Screws Through Last
Hole On Each End
17 1/2
Min.
"
Attaching to Wall Stud: This method pro-
vides the strongest hold. Insert mounting
screws through mounting bracket and into
wall studs.
AjdoingWal
Attaching to Wall Anchor: This method
allows you to attach mounting bracket to
hollow walls (wall areas between studs) or
to solid walls (concrete or masonry).
Floor
Models FB-3B, FBS-3B
Figure 9 - Mounting Bracket Clearances
Decidewhichmethodbettersuitsyourneeds.
Eithermethodwillprovideasecureholdfor
the mounting bracket.
Figure7-RemovingFrontPanelofHeater
(Model FBS-3B Shown)
107297
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OWNER’S MANUAL
Installing Bottom Mounting
Screws
1. Locate two bottom mounting holes.
These holes are near bottom on back
panel of heater (see Figure 13).
INSTALLATION
Continued
Attaching Mounting Bracket To
Wall
2. Mark screw locations on wall.
Note: Wall anchors, mounting screws, and
spacers are in hardware package. The hard-
ware package is provided with heater.
Figure 10 - Folding Anchor
3. Remove heater from mounting bracket.
4. If installing bottom mounting screws
into hollow or solid wall, install wall
anchors. Follow steps 1 through 4 un-
der Attaching To Wall Anchor Method.
If installing bottom mounting screw
into wall stud, drill holes at marked lo-
cations using 9/64" drill bit.
Attaching to Wall Stud Method
Forattachingmountingbrackettowallstuds
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.
Figure 11 - Popping Open Anchor Wings
For Thin Walls
5. Replace heater onto mounting bracket.
6. Place spacers between bottom mount-
ing holes and wall anchor or drilled hole.
Placing Heater On Mounting
Bracket
1. Locate two horizontal slots on back
panel of heater (see Figure 12).
3. Insert mounting screws through bracket
and into wall studs.
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.
4. Tighten screws until mounting bracket
is firmly fastened to wall studs.
2. Place heater onto mounting bracket.
Slide horizontal slots onto stand-out
tabs on mounting bracket.
Attaching to Wall Anchor Method
For attaching mounting bracket to hollow
walls (wall areas between studs) or solid
walls (concrete or masonry)
8. Tighten both screws until heater is firmly
secured to wall. Do not over tighten.
Horizontal Slots
Note: Do not replace front panel at this
time. Replace front panel after making
gas connections and checking for leaks
(see pages 10 and 11).
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 10.
3. Insert wall anchor (wings first) into
hole. Tap anchor flush 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
11). IMPORTANT: Do not hammer
key!For thick walls (over 1/2" thick)
or solid walls, do not pop open wings.
Mounting Bracket
Stand-Out Tab
(attached to wall)
Figure 12 - Mounting Heater Onto
Mounting Bracket
Figure 13 - Installing Bottom Mounting
Screws
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 firmly fastened to wall.
Continued
107297
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INFRARED PROPANE/LP GAS HEATER
Apply pipe joint sealant lightly to male
INSTALLATION
CAUTION:Useonlynew,black
ironorsteelpipe.Internally-tinned
copper tubing may be used in
certain areas. Check your local
codes. Use pipe of large enough
diameter to allow proper gas vol-
ume to heater. If pipe is too small,
unduelossofpressurewilloccur.
threads. This will prevent excess sealant
from going into pipe. Excess sealant in pipe
could result in clogged heater valves.
Continued
CONNECTING TO GAS
SUPPLY
CAUTION:Usepipejointseal-
ant that is resistant to liquid pe-
troleum (LP) gas.
WARNING:Thisappliancere-
quires a 3/8" NPT (National Pipe
Thread) inlet connection to the
pressure regulator.
Installsedimenttrapinsupplylineasshown
in Figure 15. Locate sediment trap where it
is within reach for cleaning. Locate sedi-
ment trap where trapped matter is not likely
Typical Inlet Pipe Diameters
FB-3B/FBS-3C
3/8" or greater
FB-5B/FBS-5C
1/2" or greater
WARNING:Aqualifiedservice
person must connect heater to
gassupply.Followalllocalcodes.
Installation must include equipment shutoff to freeze. A sediment trap traps moisture
valve, union, and plugged 1/8" NPT tap. and contaminants. This keeps them from
Locate NPT tap within reach for test gauge going into heater controls. If sediment trap
hook up. NPT tap must be upstream from is not installed or is installed wrong, heater
heater (see Figure 15).
may not run properly.
CAUTION: Never connect
heater directly to the propane/
LP supply. This heater requires
an external regulator (not sup-
plied). Install the external regu-
lator between the heater and
propane/LP supply.
IMPORTANT:Installanequipmentshutoff IMPORTANT: Hold pressure regulator
valve in an accessible location. The equip- with wrench when connecting it to gas pip-
ment shutoff valve is for turning on or ing and/or fittings.
shutting off the gas to the appliance.
The installer must supply an external regu-
lator. The external regulator will reduce
incoming gas pressure. You must reduce
incominggaspressuretobetween11and14
inches of water. If you do not reduce incom-
ing gas pressure, heater regulator damage
could occur. Install external regulator with
the vent pointing down as shown in Figure
14. Pointing the vent down protects it from
freezing rain or sleet.
Pressure
Regulator
Regulator
Bracket
3/8" NPT
Pipe Nipple
Heater
Cabinet
Ground Joint
External Regulator
Union
Propane/LP
Supply
Tee Joint
Tank
Equipment
Shutoff
Valve *
Reducer
Bushing to
1/8" NPT
Test
Gauge
Connection *
Inlet Pipe From
External Regulator
(11" W.C. to 14"
W.C. Pressure)
1/8" NPT
Plug Tap
Tee Joint
Pipe Nipple
Cap
Sediment
Trap
3" Minimum
Figure 15 - Gas Connection
Vent Pointing Down
* ACSA/AGAdesign-certifiedequipmentshutoffvalvewith1/8"NPTtapisanacceptable
alternative to test gauge connection. Purchase the optional CSA/AGA design-certified
equipment shutoff valve from your dealer. See Accessories, page 19.
Figure 14 - External Regulator with Vent
Pointing Down
107297
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OWNER’S MANUAL
Pressure Testing Heater Gas
Connections
1. Open equipment shutoff valve (see
Figure 16).
INSTALLATION
OPERATING
HEATER
NON-THERMOSTAT MODELS
FB-3B AND FB-5B
Continued
CHECKING GAS
CONNECTIONS
2. Open propane/LP supply tank valve.
3. Make sure control knob of heater is in
the OFF position.
WARNING: Test all gas pip-
ing and connections for leaks
after installing or servicing. Cor-
rect all leaks at once.
FOR YOUR SAFETY
READ BEFORE
LIGHTING
4. Check all joints from equipment shutoff
valve to control valve (see Figure 16).
Apply mixture of liquid soap and wa-
ter to gas joints. Bubbles forming show
a leak.
WARNING: If you do not fol-
low these instructions exactly, a
fireorexplosionmayresultcaus-
ing property damage, personal
injury or loss of life.
WARNING:Neveruseanopen
flame to check for a leak. Apply a
mixture of liquid soap and water
toalljoints.Bubblesformingshow
a leak. Correct all leaks at once.
5. Correct all leaks at once.
6. Light heater (see Operating Heater,
column 3 and page 12 for non-thermo-
stat models, pages 13 and 14 for ther-
mostat models). Check the rest of the
internal joints for leaks.
A. This appliance has a pilot which must
be lighted by hand. When lighting the
pilot, follow these instructions exactly.
Pressure Testing Gas Supply
Piping System
7. Turn off heater (see To Turn Off Gas
to Appliance, page 12 for non-ther-
mostat models or page 13 for thermo-
stat models).
Test Pressures In Excess Of 1/2 PSIG
(3.5 K Pa)
B. BEFORE LIGHTING smell all
around the appliance area for gas. Be
sure to smell next to the floor because
some gas is heavier than air and will
settle on the floor.
1. Disconnect appliance with its appliance
main gas valve (control valve) and equip-
ment shutoff valve from gas supply pip-
ing system. Pressures in excess of 1/2 psig
will damage heater regulator.
8. Replace front panel.
Open
WHATTO DO IFYOU 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.
Equipment
Shutoff
Valve
2. Cap off open end of gas pipe where
equipment shutoff valve was connected.
3. Pressurize supply piping system by ei-
ther using compressed air or opening
propane/LP supply tank valve.
Closed
• If you cannot reach your gas sup-
plier, call the fire department.
4. Check all joints of gas supply piping
system. Apply mixture of liquid soap
and water to gas joints. Bubbles form-
ing show a leak.
Figure 16 - Equipment Shutoff Valve
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
qualified service technician or gas
supplier. Force or attempted repair
may result in a fire or explosion.
Control Valve Location
Thermostat Models
Propane/LP
5. Correct all leaks at once.
6. Reconnect heater and equipment
shutoff valve to gas supply. Check re-
connected fittings for leaks.
Supply Tank
Test Pressures Equal To or Less Than 1/2
PSIG (3.5 K Pa)
D. Do not use this appliance if any part
has been under water. Immediately call
a qualified service technician to inspect
the appliance and to replace any part
of the control system and any gas con-
trol which has been under water.
1. Close equipment shutoff valve (see Fig-
ure 16).
Equipment
Shutoff
Valve
2. Pressurize supply piping system by ei-
ther using compressed air or opening
propane/LP supply tank valve.
3. Check all joints from propane/LP sup-
ply tank to equipment shutoff valve (see
Figure 17). Apply mixture of liquid
soap and water to gas joints. Bubbles
forming show a leak.
Control Valve
Location Non-
Thermostat Models
Figure 17 - Checking Gas Joints
Continued
4. Correct all leaks at once.
107297
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INFRARED PROPANE/LP GAS HEATER
Slightlypressincontrolknobandturncoun-
terclockwise to the LOW, ME-
DIUM, or HIGH positions (see Figure 20).
OPERATING
HEATER
Continued
IMPORTANT: Release downward pres-
sure while turning control knob. Control
knob will lock at the desired position.
LIGHTING
INSTRUCTIONS
Figure 18 - Control Knob In The OFF
Position
TO TURN OFF GAS TO
APPLIANCE
1. STOP! Read the safety information
page 11, column 3.
Ignitor Electrode
Thermocouple
Pilot Burner
2. Make sure equipment shutoff valve
is fully open.
Shutting Off Heater
1. Turn control knob clockwise
to the OFF position.
3. Turn control knob clockwise
to the OFF position.
2. Turn off all electric power to the ap-
pliance if service is to be performed.
4. Wait five minutes to clear out any
gas. Then smell for gas, including
near the floor. If you smell gas,
STOP! Follow “B” in the safety in-
formation page 11, column 3. If you
don’t smell gas, go to the next step.
Shutting Off Burner Only (pilot
stays lit)
Figure 19 - Pilot
TO SELECT
HEATING LEVEL
Turn control knob clockwise
the PILOT/IGN position.
to
5. Press in and turn control knob coun-
terclockwise
position. Press in control knob for
five (5) seconds (see Figure 18).
to PILOT/IGN
MANUAL LIGHTING
PROCEDURE
1. Follow steps 1 through 5 under Light-
ing Instructions.
WARNING: When running
heater, set control knob at LOW,
MEDIUM, or HIGH locked posi-
tions. Never set control knob be-
tween locked positions. Poor
combustion and higher levels of
carbon monoxide may result.
Note:You may be running this heater
for the first time after hooking up to
gas supply. If so, you may need to press
in control knob for 30 seconds.This will
allow air to bleed from the gas system.
• If control knob does not pop up when
released, contact a qualified service
person or supplier for repairs.
2. With control knob pressed in, strike
match. Hold match to pilot until pi-
lot lights.
3. Keep control knob pressed in for 30
seconds after lighting pilot. After 30
seconds, release control knob.
CAUTION:Donottrytoadjust
heatinglevelsbyusingtheequip-
ment shutoff valve.
6. Release downward pressure on con-
trol knob and turn clockwise
to OFF position.
Control
7. Press in control knob and turn back
to PILOT/IGN. This will cause the
piezo ignitor to spark and light the
pilot gas. If needed, repeat steps 5
through 7 until pilot lights.
Knob
FB-3B
FB-5B
LOW
Note: If pilot does not stay lit, refer
to Troubleshooting, pages 15 through
17. Also contact a qualified service
person or gas supplier for repairs.
Until repairs are made, light pilot
with match. To light pilot with match,
see Manual Lighting Procedure.
MED
HIGH
OFF
8 . Keep control knob pressed in for 30
seconds after lighting pilot. After 30
seconds, release control knob.
Note: If pilot goes out, repeat steps
3 through 7.
Figure 20 - Burner Patterns
107297
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OWNER’S MANUAL
3. Push in control knob slightly and turn 7. Press in control knob and turn coun-
OPERATING
clockwise
to the OFF posi-
terclockwise
past IGN to PI-
HEATER
tion. Be sure that the temperature set-
ting knob is set at the line between
level 1 and level 7 (see Figure 21).
LOT (see Figure 21).This will cause the
piezo ignitor to spark and light the pilot
gas. Keep control knob depressed for
10 seconds before releasing. If needed,
repeatsteps5through7untilpilotlights.
Continued
THERMOSTAT MODELS FBS-3C
AND FBS-5C
4. Wait five minutes to clear out any
gas. Then smell for gas, including
near the floor. If you smell gas,
STOP! Follow “B” in the safety in-
formation in column 1. If you don’t
smell gas, go to the next step.
Note: If pilot does not stay lit, refer
to Troubleshooting, pages 15 through
17. Also contact a qualified service
person or gas supplier for repairs.
Until repairs are made, light pilot with
match. To light pilot with match, see
Manual Lighting Procedure, page 14.
FOR YOUR SAFETY
READ BEFORE
LIGHTING
5. Push in and turn control knob coun-
terclockwise
to PILOT po-
WARNING: If you do not fol-
low these instructions exactly, a
fireorexplosionmayresultcaus-
ing property damage, personal
injury or loss of life.
sition. Press in control knob for five
(5) seconds.
8 . When pilot is lit, turn the control
knob to ON position (see Figure 23).
Note: You may be running this
heater for the first time after hook-
ing up to gas supply. If so, you may
need to press in control knob for 30
seconds. This will allow air to bleed
from the gas system.
9. To select desired heating level, turn
the temperature setting knob coun-
A. This appliance has a pilot which must
be lighted by hand. When lighting the
pilot, follow these instructions exactly.
terclockwise
between 1 and
7 (see Figure 23).
TO TURN OFF GAS
TO APPLIANCE
B. BEFORE LIGHTING smell all
around the appliance area for gas. Be
sure to smell next to the floor because
some gas is heavier than air and will
settle on the floor.
6. Release downward pressure on con-
trol knob and turn clockwise
to OFF position.
Shutting Off Heater
1. Turn control knob clockwise
to the OFF position.
IGN
ON
WHATTO DO IFYOU 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.
4
OFF
2. Turn off all electric power to the ap-
pliance if service is to be performed.
Shutting Off Burner Only (pilot
stays lit)
Figure 21- Dual Control for Thermostat
Models FBS-3C and FBS-5C
Turn control knob clockwise
the PILOT position.
to
• If you cannot reach your gas sup-
plier, call the fire department.
Ignitor Electrode
Thermocouple
Pilot Burner
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
qualified service technician or gas
supplier. Force or attempted repair
may result in a fire or explosion.
Figure 22 - Pilot
D. Do not use this appliance if any part
has been under water. Immediately call
a qualified service technician to inspect
the appliance and to replace any part
of the control system and any gas con-
trol which has been under water.
Temperature Control
Setting Knob Knob
FBS-3C
FBS-5C
IGN
ON
ON
OFF
LIGHTING
INSTRUCTIONS
IGN
ON
OFF
1. STOP! Read the safety information,
column 1.
OFF
2. Make sure equipment shutoff valve
is fully open.
Figure 23 - Burner Patterns
Continued
107297
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INFRARED PROPANE/LP GAS HEATER
Pilot Burner
ODS/PILOT AND BURNER
• Use a vacuum cleaner, pressurized air,
or small, soft bristled brush to clean.
OPERATING
Thermocouple
HEATER
Continued
GOOD PILOT
GRH/OV 009
CLEANING BURNER
PILOT AIR INLET HOLE
Figure 24- Correct Pilot Flame Pattern
THERMOSTAT CONTROL
OPERATION
The thermostatic control used on these
modelsdiffersfromstandardthermostats.
Standard thermostats simply turn on and
off the burner. The thermostat used on
this heater senses the room temperature.
At times the room may exceed the set
temperature.Ifso,theburnerwillshutoff.
The burner will cycle back on when room
temperaturedropsbelowthesettempera-
ture. Thetemperaturesettingknobcanbe
set to any comfort level between 1 and 7.
Note: The thermostat sensing bulb mea-
sures the temperature of air near the
heatercabinet.Thismaynotalwaysagree
with room temperature (depending on
housing construction, installation loca-
tion, room size, open air temperatures,
etc.) Frequent use of your heater will let
you determine your own comfort levels.
We recommend that you clean the unit every
2,500hoursofoperationoreverythreemonths.
Pilot Burner
Thermocouple
Wealsorecommendthatyoukeeptheburner
tubeandpilotassemblycleanandfreeofdust
and dirt. To clean these parts we recommend
using compressed air no greater than 30 PSI.
Yourlocalcomputerstore,hardwarestore,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.
BAD PILOT
GRH/OV 010
Figure 25 - Incorrect Pilot Flame Pattern
BURNER FLAME PATTERN
Figure 26 shows a correct burner flame
pattern.Figure27showsanincorrectburner
flame pattern.
If pilot flame pattern is incorrect, as shown
in Figure 27
1. Shut off the unit, including the pilot.
Allow the unit to cool for at least thirty
minutes.
• turn heater off (see To Turn Off Gas to Ap-
pliance, page 12 for non-thermostat mod-
els or page 13 for thermostat models)
2. Inspect burner, pilot for dust and dirt.
• see Troubleshooting, pages 15 through 17
3. Blow air through the ports/slots and
holes in the burner.
MANUAL LIGHTING
PROCEDURE
1. Follow steps 1 through 5 under Light-
ing Instructions, page 13.
2. With control knob pressed in, strike
match. Hold match to pilot until pi-
lot lights.
3. Keep control knob pressed in for 30
seconds after lighting pilot. After 30
seconds, release control knob. Follow
steps 8 and 9 under Lighting Instruc-
tions, page 13.
Clean the pilot assembly also. A yellow tip
on the pilot flame indicates dust and dirt in
the pilot assembly. There is a small pilot air
inlet hole about two inches from where the
pilot flame comes out of the pilot assembly
(see Figure 28). With the unit off, lightly
blow air through the air inlet hole. You may
blowthroughadrinkingstrawifcompressed
air is not available.
Figure 26 - Correct Burner Flame Pattern
Bad Burner Pattern-Plaque
GRH/OV 019
Pilot Air Inlet
Hole
Figure27-IncorrectBurnerFlamePattern
INSPECTING
BURNER
CLEANING AND
MAINTENANCE
WARNING: Turn off heater
and let cool before servicing.
Check pilot flame pattern and burner flame
pattern often.
Pilot Assembly
PILOT FLAME PATTERN
Figure24showsacorrectpilotflamepattern.
Figure 25 shows an incorrect pilot flame
pattern.Theincorrectpilotflameisnottouch-
ing the thermocouple. This will cause the
thermocouple to cool. When the thermo-
couple cools, the heater will shut down.
If pilot flame pattern is incorrect, as shown
in Figure 25
• turn heater off (see To Turn Off Gas to Ap-
pliance, page 12 for non-thermostat mod-
els or page 13 for thermostat models)
• see Troubleshooting, pages 15 through 17
Figure 28 - Pilot Inlet Air Hole
CAUTION: You must keep
control areas, burner, and circu-
lating air passageways of heater
clean. Inspect these areas of
heater before each use. Have
heaterinspectedyearlybyaquali-
fied service person. Heater may
needmorefrequentcleaningdue
to excessive lint from carpeting,
bedding material, pet hair, etc.
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 cabi-
net to remove dust.
107297
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OWNER’S MANUAL
TROUBLESHOOTING
Note: For additional help, visit DESA
International’stechnicalservicewebsite
WARNING: Turn off and un-
CAUTION: Never use a wire,
needle, or similar object to clean
ODS/pilot.ThiscandamageODS/
pilot unit.
plug heater and let cool before
servicing. Only a qualified ser-
vice person should service and
repair heater.
Note: All troubleshooting items are listed
in order of operation.
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
Whenignitorbuttonispressedin,thereisno 1. Ignitor electrode positioned wrong
spark at ODS/pilot 2. Ignitor electrode broken
1. Replace ignitor
2. Replace ignitor
3. Ignitor electrode not connected to igni- 3. Reconnect ignitor cable
tor cable
4. Ignitor cable pinched or wet
4. Free ignitor cable if pinched by any
metal or tubing. Keep ignitor cable dry
5. Replace ignitor cable
6. Replace control valve (piezo is part of
5. Broken ignitor cable
6. Bad piezo ignitor
control valve)
ODS/pilot lights but flame goes out when 1. Gas supply turned off or equipment 1. Turn on gas supply or open equipment
control knob is released shutoff valve closed shutoff valve
2. Control knob not fully pressed in while 2. Fully press in control knob while press-
pressing ignitor button
ing ignitor button
3. Air in gas lines when installed
3. Continue holding down control knob. Re-
peat igniting operation until air is removed
4. Contact local propane/LP gas company
5. Clean ODS/pilot (see Cleaning and
Maintenance, page 14 ) or replace ODS/
pilot assembly
4. Depleted gas supply
5. ODS/pilot is clogged
6. Gas regulator setting is not correct
7. Control knob not in pilot position
6. Replace gas regulator
7. Turn control knob to pilot position
When ignitor button is pressed in, there is a 1. Control knob not fully pressed in
1. Press in control knob fully
spark at ODS/pilot but no ignition
2. Control knob not pressed in long enough 2. After ODS/pilot lights, keep control
knob pressed in 30 seconds
3. Equipment shutoff valve not fully open 3. Fully open equipment shutoff valve
4. Thermocouple connection loose at con- 4. Hand tighten until snug, then tighten
trol valve
1/4 turn more
5. Pilot flame not touching thermocouple, 5. A) Contact local propane/LPgas company
which allows thermocouple to cool,
causing pilot flame to go out. This prob-
lem could be caused by one or both of
the following:
B) Clean ODS/pilot (see Cleaning and
Maintenance, page 14) or replace ODS/
pilot assembly
A) Low gas pressure
B) Dirty or partially clogged ODS/pilot
6. Thermocouple damaged
7. Control valve damaged
6. Replace thermocouple
7. Replace control valve
Continued
107297
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INFRARED PROPANE/LP GAS HEATER
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
Burner(s) does not light after ODS/pilot is lit 1. Burner orifice(s) is clogged
1. Clean burner orifice(s) (see Cleaning
and Maintenance, page 14) or replace
burner orifice(s)
2. Burner orifice(s) diameter is too small
2. Replace burner orifice(s)
3. Inlet gas pressure is too low
3. Contact local propane/LP gas company
Delayed ignition of burner(s)
1. Manifold pressure is too low
2. Burner orifice(s) is clogged
1. Contact local propane/LP gas company
2. Clean burner orifice(s) (see Cleaning
and Maintenance, page 14) or replace
burner orifice(s)
Burner backfiring during combustion
1. Burner orifice(s) is clogged or damaged 1. Clean burner orifice(s) (see Cleaning
and Maintenance, page 14) or replace
burner orifice(s)
2. Burner damaged
2. Replace burner
3. Gas regulator defective
3. Replace gas regulator
Burner plaque(s) does not glow
1. Plaque damaged
1. Replace burner
2. Inlet gas pressure is too low
2. Contact local propane/LP gas company
3. Control knob set between locked 3. Turn control knob until it locks at de-
positions sired setting
Slight smoke or odor during initial operation 1. Residues from manufacturing processes 1. Problem will stop after a few hours of
operation
Heater produces a clicking/ticking noise 1. Metal expanding while heating or con- 1. This is common with most heaters. If
just after burner is lit or shut off
tracting while cooling
noise is excessive, contact qualified ser-
vice person
Whitepowderresidueformingwithinburner 1. When heated, vapors from furniture pol- 1. Turn heater off when using furniture
box or on adjacent walls or furniture
ish, wax, carpet cleaners, etc. turn into
white powder residue
polish, wax, carpet cleaners, or similar
products
107297
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OWNER’S MANUAL
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.
• Immediatelycallyourgassupplierfromaneighbor’sphone. Followthe
gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire 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
POSSIBLE CAUSE
REMEDY
Heater produces unwanted odors
1. Heater burning vapors from paint, hair
spray, glues, etc. See IMPORTANT
statement above
1. Ventilate room. Stop using odor caus-
ing products while heater is running
2. Gas leak. SeeWarning statement at
top of page
2. Locate and correct all leaks (see Check-
ing Gas Connections, page 11)
Heater shuts off in use (ODS operates)
1. Not enough fresh air is available
2. Low line pressure
3. ODS/pilot is partially clogged
1. Open window and/or door for ventilation
2. Contact local propane/LP gas company
3. Clean ODS/pilot (see Cleaning and
Maintenance, page 14)
Gas odor even when control knob is in OFF 1. Gas leak. SeeWarning statement at
1. Locate and correct all leaks (see Check-
ing Gas Connections, page 11)
2. Replace control valve
position
top of page
2. Control valve defective
Gas odor during combustion
1. Foreign matter between control valve
and burner
1. Take apart gas tubing and remove for-
eign matter
2. Gas leak. SeeWarning statement at
top of page
2. Locate and correct all leaks (see Check-
ing Gas Connections, page 11)
Moisture/condensationnoticedonwindows 1. Not enough combustion/ventilation air
1. Refer to Fresh Air for Combustion and
Ventilation requirements (page 4)
107297
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INFRARED PROPANE/LP GAS HEATER
SPECIFICATIONS
FB-3B
FBS-3C
15,000
Propane/LP Only
Piezo
FB-5B
FBS-5C
25,000
Propane/LP Only
Piezo
Btu (Variable)
6,000/12,000/15,000
Propane/LP Only
Piezo
6,000/15,000/25,000
Propane/LP Only
Piezo
Type Gas
Ignition
Pressure Regulator Setting
Inlet Gas Pressure* (in. of water)
10 W.C.
10" W.C.
10" W.C.
10" W.C.
Maximum
Minimum
14"
11"
14"
11"
14"
11"
14"
11"
Dimensions, Inches (H x W x D)
Heater
Carton
23 x 18.75 x 7
26 x 21 x 9
23 x 18.75 x 7
26 x 21 x 9
23 x 26 x 7
26 x 28.5 x 9
23 x 26 x 7
26 x 28.5 x 9
Weight (pounds)
Heater
Shipping
19.8
23.3
20
23.5
28
33.5
28.5
34
Note: Dimensions listed are outer most points on the heater (includes control knobs and grill).
* For purposes of input adjustment.
PARTS CENTRALS
These Parts Centrals are privately owned businesses. They have agreed to support our
customer's needs by providing original replacement parts and accessories.
Washer Equipment Co.
1715 Main Street
Kansas City, MO 64108-2195
KS, MO, AR
Dayton Hardware
P.O. Box 275
North Dayton Station
Dayton, OH 45404-0275
All States
Baltimore Electric
1348 Dixwell Avenue
Hamden, CT 06514-0322
1-800-397-7553
816-842-3911
203-248-7553
937-258-3721
Parts Department
OH 1-800-762-3426
East Coast Energy Products
707 Broadway
W. Long Branch, NJ 07764-1542
732-870-8809
Portable Heater Parts
342 N. County Rd. 400 East
Valparaiso, IN 46383-9704
All States
Halco Enterprises
208 Carter Drive, Unit 21
West Chester, PA 19382-4500
610-430-7717
1-800-755-8809
219-462-7441
1-800-368-0803
1-800-362-6951
Tarantin Tank Co.
P.O. Box 6129
Freehold, NJ 07728-6129
908-780-9340
1-800-922-0724
LA Porte’s Parts & Service
2444 N. 5th Street
Hartsville, SC 29550-7704
803-332-0191
FBD
1349 Adams Street
Bowling Green, KY 42103-3414
270-846-1199
Parts Department
1-800-654-8534
Fax: 1-800-846-0090
Heater and Fireplace Store
58 Halbe Lane
Cape May Court, NJ 08210-1110
609-390-9774
Cans Unlimited, Inc.
P.O. Box 645
Taylor, SC 29687-0013
All States
803-879-3009
1-800-845-5301
Master Parts Dist.
1251 Mound Ave. NW
Grand Rapids, MI 49504-2672
616-791-0505
Parts Department
1-800-446-1446
Fax: 616-791-8270
107297
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OWNER’S MANUAL
REPLACEMENT
PARTS
SERVICE
TECHNICAL
SERVICE
PUBLICATIONS
Note: Use only original replacement parts.
Thiswillprotectyourwarrantycoveragefor
parts replaced under warranty.
Youcanpurchaseaservicemanualfromthe You may have further questions about in-
address listed on the back page of this stallation, operation, or troubleshooting.
manual. Send a check for $5.00 payable to
If so, contact DESA International’s Techni-
DESA International.
cal Service Department at 1-800-323-5190.
PARTS UNDER WARRANTY
You can also visit DESA International’s
technical service web site at
Contact authorized dealer from whom you
purchased this product. If they are unable to
supply original replacement part(s), call
DESAInternational’sTechnicalServiceDe-
partmentat1-800-323-5190forinformation.
ACCESSORIES
When contacting your dealer or DESA In-
ternational, have ready:
• your name
Purchasetheseheateraccessoriesfromyour
local dealer. If they can not supply these
accessories, contact your nearest Parts Cen-
tral or call DESA International’s Parts De-
partment at 1-800-972-7879 for referral in-
formation. You can also write to the address
listed on the back page of this manual.
• your address
• model and serial numbers of your heater
• how heater was malfunctioning
• type of gas used (propane/LP or natural gas)
• purchase date
Usually, we will ask you to return the defec-
tive part to the factory.
PARTS NOT UNDER
WARRANTY
FLOOR MOUNTING STAND
Models FB-3B and FBS-3B -
UH3000BA
Contact authorized dealers of this product.
If they can’t supply original replacement
part(s), call DESA International’s Parts
Department at 1-800-972-7879 for referral
information. When calling DESA Interna-
tional, have ready:
EQUIPMENT SHUTOFF
Model FB-5B and FBS-5B -
VALVE GA5010
UH5000BA
For all models. Equipment shutoff valve
For locating heater on the floor, away from
with 1/8" NPT tap.
• model number of your heater
• the replacement part number
a wall. Complete installation instructions
provided with floor mounting stand.
SERVICE HINTS
When Gas Pressure is Too Low
• pilot will not stay lit
• burner(s) will have delayed ignition
• heater will not produce specified heat
• propane/LP gas supply may be low
FAN KITS - UH1000FB AND
UHS1000FB
When Gas Quality is Bad
• pilot will not stay lit
For all models. Provides better heat distri-
bution. Makes heater more efficient. Com-
plete installation and operating instructions
included.
• burner(s) will produce flames and soot
• heater will backfire when lit
You may feel your gas pressure is too low or
gas quality is bad. If so, contact your local
propane/LP gas supplier.
Manually-controlled-UH1000FB.Includes
ON/OFF switch.
Thermostatically-controlled-UHS1000FB.
Includes three settings: ON/OFF/AUTO.
107297
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INFRARED PROPANE/LP GAS HEATER
ILLUSTRATED
26
PARTS
BREAKDOWN
FB-3B
19
7
1
21
4
22
(See Detail)
23
20
25
3
2
24
25
4
18
15
7
11
7
9
6
18
5
10
5-1
5-2
7
16
18
17
14
Burner Assembly
8
13
ODS/Pilot Assembly
12
107297
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OWNER’S MANUAL
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
listed under Replacement Parts on page 19 of this manual.
PARTS LIST
FB-3B
KEY
PART NO.
FB-3B
L98409-02 Cabinet Assembly
L98005-02 Lower Front Panel Assembly
L98410-02 Deflector Unit
NO.
1
2
DESCRIPTION
QTY.
1
1
3
1
4
5
5-1
5-2
6
L98103-04 Burner Assembly
L98071-02 ODS Pilot Assembly
098514-01 Thermocouple
L98071-07 Ignitor Electrode
L98072-01 ODS Mounting Bracket
L98817-01 Self Tapping Screw
L98034-01 Control Valve
1
1
1
1
1
7
1
7
8
9
L98411-01 Ignitor Line
1
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
L98028-01 Control Valve Bracket
L98054-01 Control Valve Fixed Nut
L98059-01 Control Valve Main Inlet Nut
L98115-02 Main Inlet Tube Assembly
L98123-02 ODS Gas Line Assembly
L98117-02 Burner Gas Line Assembly A
L98120-02 Burner Gas Line Assembly B
L98122-02 Burner Gas Line Assembly C
L99023-02 Injector
1
1
1
1
1
1
1
1
3
1
1
1
2
2
1
2
L98061-01 Control Knob
L98906-01 Control Rod Assembly
L99029-02 Pressure Regulator
L98801-01 Washer
L98806-01 Self Tapping Screw
L98010-02 Grill Guard
L98011-01 Grill Fastener
L98085-01 Mounting Bracket
1
PARTS AVAILABLE - NOT SHOWN
100642-01 Hardware Assembly
104892-40 CSA/AGA Decal
L98098-02 Gas Instruction Decal
L98100-01 Inside Warning Label
1
1
1
1
107297
21
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INFRARED PROPANE/LP GAS HEATER
31
ILLUSTRATED
PARTS
BREAKDOWN
FB-5B
24
30
7
26
29
1
3
30
28
27
25
4
(See Detail)
4
TO "B1"
22
2
19
7
7
TO "B2"
22
11
22
21
23
6
20
5
10
7
9
18
5-1
5-2
14
TO "C1"
22
13
14
12
8
16
23
TO "C2"
22
17
15
ODS/Pilot Assembly
Burner Assembly
107297
22
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OWNER’S MANUAL
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
listed under Replacement Parts on page 19 of this manual.
PARTS LIST
FB-5B
KEY
PART NO.
NO.
1
2
3
4
FB-5B
DESCRIPTION
QTY.
1
1
1
1
1
1
1
1
7
1
1
1
1
1
1
1
1
1
1
1
1
1
1
5
2
1
1
1
2
2
1
2
1
L98409-01 Cabinet Assembly
L98005-01 Lower Front Panel Assembly
L98410-01 Deflector Unit
L98103-02 Burner Assembly
L98071-02 ODS Pilot Assembly
098514-01 Thermocouple
5
5-1
5-2
6
7
8
L98071-07 Ignitor Electrode
L98072-01 ODS Mounting Bracket
L98817-01 Self Tapping Screw
L98034-01 Control Valve
9
L98411-01 Ignitor Line
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
L98028-01 Control Valve Bracket
L98054-01 Control Valve Fixed Nut
L98059-01 Control Valve Main Inlet Nut
L98115-01 Main Inlet Tube Assembly
L98123-01 ODS Gas Line Assembly
L98116-01 Burner Gas Line Assembly “C”
L98117-01 Burner Gas Line Assembly “C1”
L98118-01 Burner Gas Line Assembly “C2”
L98119-01 Burner Gas Line Assembly “B”
L98120-01 Burner Gas Line Assembly “B1”
L98121-01 Burner Gas Line Assembly “B2”
L98122-01 Burner Gas Line Assembly “A”
L99023-02 Injector
L99047-01 “T” Joint
L98061-01 Control Knob
L98906-01 Control Rod Assembly
L99029-02 Pressure Regulator
L98801-01 Washer
L98806-01 Self Tapping Screw
L98010-01 Grill Guard
L98011-01 Grill Fastener
L98085-01 Mounting Bracket
PARTS AVAILABLE - NOT SHOWN
100642-01 Hardware Assembly
104892-41 CSA/AGA Decal
L98098-02 Gas Instruction Decal
L98100-01 Inside Warning Label
1
1
1
1
107297
23
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INFRARED PROPANE/LP GAS HEATER
ILLUSTRATED
8
6
PARTS
5
BREAKDOWN
13
FBS-3C
1
7
17
16
16
25
22
9
4
(See Detail)
2
26
24
22
23
3
27
27
16
4
16
9
14-1
14-2
21
16
13
12
15
14
21
16
11
18
10
20
17
Burner Assembly
19
ODS/Pilot Assembly
107297
24
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OWNER’S MANUAL
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
listed under Replacement Parts on page 19 of this manual.
PARTS LIST
FBS-3C
KEY
NO.
1
2
3
4
5
6
7
PART NO.
FBS-3B
DESCRIPTION
QTY.
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
7
1
1
1
1
3
1
1
2
2
1
L98409-04
L98006-02
L98410-04
L98103-04
L98135-03
L99066-01
L98084-01
L98085-01
L98133-04
L98055-01
L98056-01
L98057-01
L98411-01
L98071-04
098514-01
L98071-07
L98072-01
L98817-01
L98123-04
L98117-04
L98120-04
L98122-04
L99023-02
L98115-08
L99029-06
L98801-01
L98806-01
L98010-04
L98011-01
Cabinet Assembly
Front Panel Assembly
Reflector Unit
Burner Assembly
Thermostat Valve Assembly
Thermostat Valve Base
Self Tapping Screw
Mounting Bracket
Thermostat Outlet Tube Assembly
4-Way Connector
4-Way Connector Bracket
4-Way Connector Fixed Nut
Ignitor Line
8
9
10
11
12
13
14
14-1
14-2
15
16
17
18
19
20
21
22
23
24
25
26
27
ODS Pilot
Thermocouple
Ignitor Electrode
ODS Mounting Bracket
Self Tapping Screw
ODS Gas Line Assembly
“A” Burner Gas Line Assembly
“B” Burner Gas Line Assembly
“C” Burner Gas Line Assembly
Injector
Main Inlet Tube Assembly
Pressure Regulator
Washer
Self Tapping Screw
Grill Guard
Grill Fastener
2
PARTS AVAILABLE - NOT SHOWN
100642-01
Hardware Assembly
CSA/AGA Decal
Gas Instruction Decal
Inside Warning Label
Thermostat Sensing Bulb Clip
1
1
1
1
2
104892-45
L98098-02
L98100-01
L98080-02
107297
25
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INFRARED PROPANE/LP GAS HEATER
ILLUSTRATED
8
6
PARTS
5
BREAKDOWN
13
4
(See Detail)
1
FBS-5B
7
17
27
9
16
16
30
29
27
28
3
32
2
31
16
32
4
16
9
TO "B1"
16
25
TO "B2"
25
22
12
15
14
25
26
11
16
TO "C1"
13
23
24
14-1
14-2
25
17
10
19
TO "C2"
21
25
26
20
18
ODS/Pilot Assembly
Burner Assembly
107297
26
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OWNER’S MANUAL
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
listed under Replacement Parts on page 19 of this manual.
PARTS LIST
FBS-5C
KEY
NO.
1
2
3
4
5
6
7
PART NO.
FBS-5B
DESCRIPTION
QTY.
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
14
1
1
1
1
1
1
1
1
5
2
1
1
2
2
1
L98409-03
L98006-01
L98410-03
L98103-02
L98135-03
L99066-01
L98084-01
L98085-01
L98133-04
L98055-01
L98056-01
L98057-01
L98411-01
L98071-04
098514-01
L98071-07
L98072-01
L98817-01
L98123-03
L98116-02
L98117-01
L98118-01
L98119-02
L98120-01
L98121-01
L98122-03
L99023-02
L99047-01
L98115-08
L99029-06
L98801-01
L98806-01
L98010-03
L98011-01
Cabinet Assembly
Front Panel Assembly
Reflector Unit
Burner Assembly
Thermostat Valve Assembly
Thermostat Valve Base
Self Tapping Screw
Mounting Bracket
Thermostat Outlet Tube Assy
4-Way Connector
4-Way Connector Bracket
4-Way Connector Fixed Nut
Ignitor Line
ODS Pilot Assembly
Thermocouple
8
9
10
11
12
13
14
14-1
14-2
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Ignitor Electrode
ODS Mounting Bracket
Self Tapping Screw
ODS Gas Line Assembly
Burner Gas Line Assembly “C”
Burner Gas Line Assembly “C1”
Burner Gas Line Assembly “C2”
Burner Gas Line Assembly “B”
Burner Gas Line Assembly “B1”
Burner Gas Line Assembly “B2”
Burner Gas Line Assembly “A”
Injector
“T” Joint
Main Inlet Tube Assembly
Pressure Regulator
Washer
Self Tapping Screw
Grill Guard
Grill Fastener
2
PARTS AVAILABLE - NOT SHOWN
100642-01
104892-43
L98098-02
L98100-01
L98080-02
Hardware Assembly
CSA/AGA Decal
Gas Instruction Decal
Inside Warning Label
Thermostat Sensing Bulb Clip
1
1
1
1
2
107297
27
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WARRANTY INFORMATION
KEEP THIS WARRANTY
Model
Serial No.
Date Purchased
Always specify model and serial numbers when communicating with the factory.
We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our standard written warranty.
We make no other warranty, expressed or implied.
LIMITED WARRANTY
GLO-WARM VENT-FREE PROPANE/LP GAS HEATERS
DESA International warrants this product to be free from defects in materials and components for two (2) years from the date of first 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 presented.
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 and an allowance for labor when provided by a DESA Authorized Service Center. Warranty part(s) MUST be obtained
through authorized dealers of this product and/or DESA International who will provide original factory replacement parts. Failure to use
original factory replacement parts voids this warranty. The heater MUST be installed by a qualified installer in accordance with all local codes
and instructions furnished with the unit.
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.
TOTHEFULLEXTENTALLOWEDBYTHELAWOFTHEJURISDICTIONTHATGOVERNSTHESALEOFTHEPRODUCT;THIS
EXPRESSWARRANTYEXCLUDESANYANDALLOTHEREXPRESSEDWARRANTIESANDLIMITSTHEDURATIONOFANY
AND ALL IMPLIED WARRANTIES, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSETOTWO(2)YEARSONALLCOMPONENTSFROMTHEDATEOFFIRSTPURCHASE;ANDDESAINTERNATIONAL’S
LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF THE PRODUCT AND DESA INTERNATIONAL SHALL NOT BE
LIABLE FOR ANY OTHER DAMAGES WHATSOEVER INCLUDING INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAM-
AGES.
Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation of incidental or consequential damages,
so the above limitation on implied warranties, or exclusion or limitation on damages may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights that vary from state to state.
For information about this warranty write:
INTERNATIONAL
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
107297-01
L98109-02
REV. A
107297 01
NOT A UPC
02/00
Patent Pending
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