®
INFRARED VENT-FREE NATURAL GAS HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
VN1800ITB
and
VN2550ITB
WARNING: Improper installa-
WARNING: If the information in this manual is
not followed exactly, a fire or explosion may
result causing property damage, personal in-
jury, or loss of life.
tion, adjustment, alteration,
service, or maintenance can
cause injury or property dam-
age. Refer to this manual for
correctinstallationandopera-
tional procedures. For assis-
tance or additional informa-
tion consult a qualified in-
staller, service agency, or the
gas supplier.
— 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.
• Immediately call your gas supplier from a
neighbor’sphone.Followthegassupplier’s
instructions.
WARNING:Thisisanunvented
gas-firedheater.Itusesair(oxy-
gen) from the room in which it
is installed. Provisions for ad-
equate combustion and venti-
lation air must be provided.
Refer to Air For Combustion
and Ventilation on page 4 of
this manual.
• If you cannot reach your gas supplier, call
the fire department.
— Installationandservicemustbeperformedby
a qualified installer, service agency, or the
gas supplier.
This appliance may be installed in an aftermarket*, permanently located, manufac-
tured (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.
*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
PRODUCT
FEATURES
IDENTIFICATION
SAFETY DEVICE
Thermostat Control Knob
Piezo Ignitor
This heater has a pilot with an Oxygen
Control Knob
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
This heater has a piezo ignitor. This system
requires no matches, batteries, or other
sources to light heater.
Grill
Guard
THERMOSTATIC HEAT
CONTROL
Burners
This heater has a thermostat sensing bulb
and thermostat control. This results in the
greatest heater comfort. This can also result
in lower gas bills.
Front
Panel
Heater
Cabinet
Figure 1 - Vent-Free Natural Gas Heater (Model VN2550ITB Shown)
LOCAL CODES
UNPACKING
Install and use heater with care. Follow all
localcodes.Intheabsenceoflocalcodes,use
the latest edition of National Fuel Gas Code
ANS Z223.1, also known as NFPA 54*.
1. Remove heater from carton.
2. Remove all protective packaging ap-
plied to heater for shipment.
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
104246
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®
VENT-FREE NATURAL GAS HEATER
Confined and Unconfined Space
PROVIDING ADEQUATE
VENTILATION
AIR FOR
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.
COMBUSTION AND
VENTILATION
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.
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.
Today’s homes are built more energy effi- Unusually Tight Construction
cient than ever. New materials, increased
The air that leaks around doors and win-
insulation, and new construction methods
dows may provide enough fresh air for
helpreduceheatlossinhomes.Homeowners
combustion and ventilation. However, in
weather strip and caulk around windows and
buildings of unusually tight construction,
doorstokeepthecoldairoutandthewarmair
you must provide additional fresh air.
* Adjoining rooms are communicating only
iftherearedoorlesspassagewaysorventila-
tion grills between them.
in. During heating months, home owners
want their homes as airtight as possible.
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 10-11kg
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,proceedtoDeter-
mining Fresh-Air Flow for Heater
Location, page 5.
104246
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OWNER’S MANUAL
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
Vent-free heater +
40,000
18,000
58,000
Btu/Hr
Btu/Hr
Btu/Hr
Vented gas heater
Gas fireplace logs
Total
=
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
104246
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®
VENT-FREE NATURAL GAS HEATER
AIR FOR
COMBUSTION AND
VENTILATION
12"
Continued
VENTILATION AIR
Ventilation Air From Inside
Building
Ventilation Grills
Into Adjoining Room,
Ventilation
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.
Option 2
Grills
into Adjoining
Room,
Or
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
orspacesopentotheoutdoors.Thesespaces
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.
Ventilated
Attic
Outlet
Air
Outlet
Air
To Attic
To
Crawl
Space
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.
Inlet
Air
Ventilated
Crawl Space
Inlet Air
Figure 3 - Ventilation Air from Outdoors
104246
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OWNER’S MANUAL
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 Air for Combustion
and Ventilation, pages 4 through 6.
LOCATING HEATER
INSTALLATION
Thisheaterisdesignedtobemountedonawall.
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
using heater. This will help circu-
late the heat throughout the
house. In the event of a power
outage, you can use this heater
as your primary heat source.
WARNING:Maintainthemini-
mumclearancesshowninFigure
4.Ifyoucan,providegreaterclear-
ances from floor, ceiling, and
joining wall.
Forconvenienceandefficiency,installheater
• there there is easy access for operation,
inspection, and service
• in coldest part of room
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 23.
An optional fan kit is available from your
dealer. See Accessories, page 23. If plan-
ning to use fan, locate heater near an electri-
cal outlet.
WARNING: Never install the
heater
CEILING
WARNING: A qualified ser-
vice person must install heater.
Follow all local codes.
• 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
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
36"
Minimum
8"
Minimum
From
Sides Of
Heater
CHECK GAS TYPE
Use only natural gas. If your gas supply is
not natural, do not install heater. Call dealer
where you bought heater for proper type
heater.
Left
Side
Right
Side
INSTALLATION ITEMS
Minimum
CAUTION: If you install the
heater in a home garage
• heater pilot and burner must
be at least 18 inches above
floor
Beforeinstallingheater,makesureyouhave
the items listed below.
3"
To Top
t
Surface
FLOOR
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• ground joint union
• test gauge connection *
• sediment trap
Of Carpeting, Tile or
Other Combustible
Material
• locateheaterwheremovingve-
hicle will not hit it
Figure4-MountingClearancesAsViewed
From Front of Heater
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.
• 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 23.
Continued
104246
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VENT-FREE NATURAL GAS HEATER
Attaching To Wall Anchor: This method
INSTALLING HEATER TO
WALL
INSTALLATION
allows you to attach mounting bracket to
hollow walls (wall areas between studs) or
to solid walls (concrete or masonry).
Continued
Mounting Bracket
THERMOSTAT SENSING
BULB
Decidewhichmethodbettersuitsyourneeds.
Eithermethodwillprovideasecureholdfor
the mounting bracket.
Locate mounting bracket in heater carton.
Removemountingbracketfromheatercarton.
The thermostat sensing bulb has been placed
insidetheheaterforprotectionduringshipping.
Marking Screw Locations
Locating Thermostat Sensing
Bulb
1. Remove front panel of heater (see Fig-
ure 7).
1. Tape mounting bracket to wall where
heater will be located. Make sure
mounting bracket is level.
WARNING:Maintainminimum
clearances shown in Figure 8. If
you can, provide greater clear-
ancesfromfloorandjoiningwall.
2. Locate thermostat sensing bulb just
under the burner assembly.
Figure 6 - Mounting Bracket
IMPORTANT:Attachthermostatsensingbulb
to the back of heater for proper operation.
Removing Front Panel Of Heater
1. Remove two screws near bottom cor-
ners of front panel.
2. Mark screw locations on wall (see Fig-
ure 8).
Attaching Thermostat Sensing
Bulb
1. Remove thermostat sensing bulb from
holders inside heater. Route through
slot opening in bottom of heater.
2. Lift straight up on grill guard until it stops.
Grill guard will slide up about 1/4".
Note: Only mark last hole on each end
of mounting bracket. Insert mounting
screws through these holes only.
3. Pull bottom of front panel forward, then
down.
3. Remove tape and mounting bracket
from wall.
2. Place clamp on thermostat sensing bulb
as shown in Figure 5. Clamp is pro-
vided in hardware package.
13"
Min.
16"
3. Snap clamp into upper mounting hole
as shown in Figure 5. Mounting hole is
located on lower left edge on back of
heater. Make sure the thermostat sens-
ing bulb is pointing up.
Only Insert Mounting
Screws Through Last
Hole On Each End
18 3/4"
Min.
AjdoingWal
Floor
Thermostat
Sensing
Bulb
Figure7-RemovingFrontPanelOfHeater
Model VN2550ITB
Methods For Attaching
Mounting Bracket To Wall
9 1/4"
Min.
16"
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.
Clamp
Only Insert Mounting
Screws Through Last
Hole On Each End
18 3/4"
Min.
Figure 5 - Attaching Thermostat Sensing
Bulb
AjdoingWal
1. Attaching to wall stud
2. Attaching to wall anchor
Floor
Attaching To Wall Stud: This method pro-
vides the strongest hold. Insert mounting
screws through mounting bracket and into
wall studs.
Model VN1800ITB
Figure 8 - Mounting Bracket Clearances
104246
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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 14).
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 9 - 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
Attaching To Wall Stud Method
Forattachingmountingbrackettowallstuds
1. Drill holes at marked locations using
9/64" drill bit.
Figure 10 - Popping Open Anchor Wings
For Thin Walls
into wall stud, drill holes at marked lo-
cations 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.
5. Replace heater onto mounting bracket.
Placing Heater On Mounting
Bracket
1. Locate two horizontal slots on back
panel of heater.
6. Place spacers between bottom mount-
ing holes and wall anchor or drilled hole.
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
1. Drill holes at marked locations using
5/16" drill bit. For solid walls (concrete
or masonry), drill at least 1" deep.
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).
Stand-Out Tab
2. Fold wall anchor as shown in Figure 9.
3. Insert wall anchor (wings first) into
hole. Tap anchor flush to wall.
Mounting Bracket
(attached to wall)
4. For thin walls (1/2" or less), insert red
key into wall anchor. Push red key to
“pop” open anchor wings.
Figure 11 - Mounting Heater Onto
Mounting Bracket
IMPORTANT: Do not hammer key!
For thick walls (over 1/2" thick) or solid
walls, do not pop open wings.
5. Place mounting bracket onto wall. Line
up last hole on each end of bracket with
wall anchors.
Figure 12 - Installing Bottom Mounting
Screws
6. Insert mounting screws through bracket
and into wall anchors.
7. Tighten screws until mounting bracket
is firmly fastened to wall.
Continued
104246
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VENT-FREE NATURAL GAS HEATER
IMPORTANT:Installanequipmentshutoff Installsedimenttrapinsupplylineasshown
INSTALLATION
valve in an accessible location. The equip- in Figure 13. Locate sediment trap where it
ment shutoff valve is for turning on or is within reach for cleaning. Locate sedi-
shutting off the gas to the appliance.Apply ment trap where trapped matter is not likely
pipe joint sealant lightly to male threads. to freeze. A sediment trap traps moisture
This will prevent excess sealant from going and contaminants. This keeps them from
intopipe. Excesssealantinpipecouldresult going into heater controls. If sediment trap
Continued
CONNECTING TO GAS
SUPPLY
in clogged heater valves.
is not installed or is installed wrong, heater
may not run properly.
WARNING:Thisappliancere-
quires a 3/8" NPT (National Pipe
Thread) inlet connection to the
pressure regulator.
CAUTION:Usepipejointseal-
ant that is resistant to liquid pe-
troleum (LP) gas.
IMPORTANT: Hold pressure regulator
with wrench when connecting it to gas pip-
ing and/or fittings.
WARNING: A qualified service
personmustconnectheatertogas
supply. Follow all local codes.
Pressure
Regulator
WARNING : Never connect
heater to private (non-utility) gas
wells. This gas is commonly
known as well-head gas.
Regulator
Bracket
IMPORTANT: Check gas line pressure be-
fore connecting heater to gas line. Gas line
pressure must be no greater than 14 inches
of water. If gas line pressure is higher,
heater regulator damage could occur.
3/8" NPT
Pipe Nipple
Heater
Cabinet
Ground Joint
Union
Tee Joint
Reducer
Bushing to
1/8" NPT
CAUTION: Use only new,
black iron or steel pipe. Inter-
nally-tinned copper tubing may
be used in certain areas. Check
yourlocalcodes.Usepipeoflarge
enough diameter to allow proper
gas volume to heater. If pipe is
too small, undue loss of pres-
sure will occur.
Equipment
Shutoff
Valve *
Test
Gauge
Typical
Connection *
Inlet Pipe
From Gas
Meter
1/8" NPT
Plug Tap
(7" W.C. to
10.5" W.C.
Pressure)
Tee Joint
Pipe Nipple
Cap
Sediment
Trap
3" Minimum
Typical Inlet Pipe Diameters
VN1800ITB 3/8" or greater
VN2550ITB 1/2" or greater
Figure 13 - Gas Connection
Installation must include 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 13).
* 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 23.
104246
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OWNER’S MANUAL
O
Test Pressures Equal To or Less Than 1/2
PSIG (3.5 kPa)
Open
INSTALLATION
Equipment
Shutoff
Valve
Continued
1. Close equipment shutoff valve (see Fig-
ure 14).
CHECKING GAS
CONNECTIONS
2. Pressurize supply piping system by ei-
ther using compressed air or opening
main gas valve located on or near gas
meter.
Closed
WARNING: Test all gas pip-
ing and connections for leaks
after installing or servicing. Cor-
rect all leaks at once.
Figure 14 - Equipment Shutoff Valve
3. Check all joints from gas meter to
equipment shutoff valve (see Figure
15). Apply mixture of liquid soap and
water to gas joints. Bubbles forming
show a leak.
Control Valve Location
WARNING:Neveruseanopen
flame 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.
4. Correct all leaks at once.
Gas Meter
Pressure Testing Heater Gas
Connections
1. Open equipment shutoff valve (see Fig-
ure 14).
Equipment
Shutoff
Valve
Pressure Testing Gas Supply
Piping System
2. Open main gas valve located on or near
gas meter.
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
3. Make sure control knob of heater is in
the OFF position.
Figure 15 - Checking Gas Joints
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.
4. Check all joints from equipment shutoff
valve to control valve (see Figure 15).
Apply mixture of liquid soap and wa-
ter to gas joints. Bubbles forming show
a leak.
2. Cap off open end of gas pipe where
equipment shutoff valve was connected.
5. Correct all leaks at once.
6. Light heater (see Operating Heater,
pages 12 and 13). Check the rest of the
internal joints for leaks.
3. Pressurize supply piping system by ei-
ther using compressed air or opening
main gas valve located on or near gas
meter.
7. Turn off heater (see To Turn Off Gas to
Appliance, page 13).
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.
8. Replace front panel.
5. Correct all leaks at once.
6. Reconnect heater and equipment
shutoff valve to gas supply. Check re-
connected fittings for leaks.
104246
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VENT-FREE NATURAL GAS HEATER
6. Keep thermostat control knob
LIGHTING
INSTRUCTIONS
1. STOP! Read the safety information
at the top column 1.
OPERATING
HEATER
pressed in while pushing down and
releasing the ignitor button. This will
light pilot. If necessary, continue to
press ignitor button until pilot lights.
FOR YOUR SAFETY
READ BEFORE
LIGHTING
2. Make sure equipment shutoff valve
is fully open.
If pilot does not light
• turn thermostat control knob
3. Turn thermostat control knob on left
clockwise
sition
to the OFF po-
Clockwise
side of heater clockwise
the OFF position.
to
Clockwise
WARNING: If you do not fol-
low these instructions exactly, a
fireorexplosionmayresultcaus-
ing property damage, personal
injury or loss of life.
• repeat steps 5 and 6
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 information at the
top of column 1. If you don’t smell gas,
go to the next step.
If pilot does not stay lit after several
tries
• refer to Troubleshooting, pages 15
through 17
• contact a qualified service person
or gas supplier
A. This appliance has a pilot which must
be lighted by hand. When lighting the
pilot, follow these instructions exactly.
5. Turnthermostatcontrolknobonleftside
Until repairs are made, light pilot with
match. To light pilot with match, see
Manual Lighting Procedure, page 13
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.
of heater counterclockwise
to
C-clockwise
the PILOT position. Press in thermostat
control knob for 5 seconds.
7. Keep thermostat control knob
pressed in for 30 seconds after light-
ing pilot. After 30 seconds, release
control knob.
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 thermostat control
knob for 30 seconds. This will allow
air to bleed from the gas system.
• If thermostat control knob does
not pop up when released, contact
a qualified service person or gas
supplier for repairs.
WHAT TO DO IF YOU SMELL
GAS
Note: If pilot goes out, repeat steps
3 through 7. This heater has a safety
interlock system. Wait one minute
before lighting pilot again.
• 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 sup-
plier, call the fire department.
8. Turn thermostat control knob coun-
terclockwise
to the desired
C-clockwise
heating level. The plaque directly
above the pilot should light.
Ignitor Button
Thermostat Control Knob
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.
Plaque Control Knob
1
2
LO
P I L O T
O F F
H I
3
IGNITOR
4
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 control which has been un-
der water.
Figure 16 - Thermostat Control Knob In The OFF Position
Ignitor Electrode
Thermocouple
Pilot Burner
Figure 17 - Pilot
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OWNER’S MANUAL
TO TURN OFF GAS
TO APPLIANCE
OPERATING
HEATER
Shutting Off Heater
Continued
1. Turn thermostat control knob clock-
wise to the OFF position.
TO SELECT HEATING
LEVEL
Clockwise
2. Turn off all electric power to the ap-
pliance if service is to be performed.
WARNING: When running
heater, set control knob at the 1,
2, 3, or 4 locked positions. Never
set control knob between locked
positions. Poor combustion and
higher levels of carbon monox-
ide may result.
Shutting Off Burner Only (pilot
stays lit)
Turn thermostat control knob clockwise
to the PILOT position.
Clockwise
THERMOSTAT
OPERATION
CAUTION:Donottrytoadjust
heatinglevelsbyusingtheequip-
ment shutoff valve.
Since the thermostat measures the tem-
perature of air near the heater cabinet,
this may not always agree with room
temperature (depending on housing con-
struction,installationlocation,roomsize,
open air temperatures, etc.). Frequent
operation of your heater will enable you
to determine your own comfort levels.
1. Slightly press in plaque control knob
on right side of heater and turn coun-
C-clockwise
terclockwise
position.
to the desired
IMPORTANT: Release downward
pressure while turning control knob.
Control knob will lock at the desired
position.
MANUAL LIGHTING
PROCEDURE
1. Follow steps 1 through 5 under Light-
2. Turn thermostat control knob on left
side of heater to any setting between
LO and HI. Note: When burners
cycle on, or from LO to HI, a “click”
will be heard. When the burners
light, a “whoosh” noise will be heard.
ing Instructions, page 12.
2. With thermostat control knob
pressed in, strike match. Hold match
to pilot until pilot lights.
3. Keep thermostat control knob
pressed in for 30 seconds after light-
ing pilot. After 30 seconds, release
control knob. Follow step 8 under
Lighting Instructions, page 12.
Control
Knob
VN1800ITB VN2550ITB
1
2
3
4
1
2
2
3
3
4
1
4
1
2
3
4
Figure 18 - Burner Patterns
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®
VENT-FREE NATURAL GAS HEATER
Wealsorecommendthatyoukeeptheburner
INSPECTING
BURNER
tube and pilot assembly clean and free of
dustanddirt.Tocleanthesepartswerecom-
mend using compressed air no greater than
30 PSI. Your local computer store, hard-
ware store, or home center may carry com-
pressed air in a can. You can use a vacuum
cleaner in the blow position. If using com-
pressed air in a can, please follow the direc-
tions on the can. If you don't follow direc-
tions on the can, you could damage the pilot
assembly.
Check pilot flame pattern and burner flame
pattern often.
PILOT FLAME PATTERN
Figure 19 shows a correct pilot flame pat-
tern. Figure 20 shows an incorrect pilot
flame pattern. The incorrect pilot flame is
not touching the thermocouple. This will
cause the thermocouple to cool. When the
thermocouple cools, the heater will shut
down.
Figure 21 - Correct Burner Flame Pattern
1. Shut off the unit, including the pilot.
Allow the unit to cool for at least thirty
minutes.
If pilot flame pattern is incorrect, as shown
in Figure 20
2. Inspect burner, pilot for dust and dirt.
3. Blow air through the ports/slots and
holes in the burner.
• turn heater off (see To Turn Off Gas to
Appliance, 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 23). With the unit off, lightly
blow air through the air inlet hole. You may
blowthroughadrinkingstrawifcompressed
air is not available.
• see Troubleshooting, pages 15 through 17
Pilot Burner
Figure22-IncorrectBurnerFlamePattern
Thermocouple
CLEANING AND
MAINTENANCE
GRH/OV 009A
Figure 19 - Correct Pilot Flame Pattern
WARNING: Turn off heater
and let cool before cleaning.
Pilot Air Inlet
Hole
Pilot Burner
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.
Thermocouple
Pilot Assembly
Figure 23 - Pilot Inlet Air Hole
Figure 20 - Incorrect Pilot Flame Pattern
CABINET
BURNER FLAME PATTERN
Air Passageways
• Use a vacuum cleaner or pressurized air
to clean.
Figure 21 shows a correct burner flame
pattern.Figure22showsanincorrectburner
flame pattern.
ODS/PILOT AND BURNER
ORIFICE
• Use a vacuum cleaner, pressurized air,
or small, soft bristled brush to clean.
Ifburnerflamepatternisincorrect,asshown
in Figure 22
Exterior
• Use a soft cloth dampened with a mild
soap and water mixture. Wipe the cabi-
net to remove dust.
• turn heater off (see To Turn Off Gas to
CLEANING BURNER
PILOT AIR INLET HOLE
Appliance, page 13)
• see Troubleshooting, pages 15 through 17
We recommend that you clean the unit ev-
ery 2,500 hours of operation or every three
months.
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OWNER’S MANUAL
TROUBLESHOOTING
CAUTION: Never use a wire,
needle, or similar object to clean
ODS/pilot.ThiscandamageODS/
pilot unit.
WARNING: Turn off and un-
plug heater and let cool before
servicing. Only a qualified ser-
vice person should service and
repair heater.
Note: For additional help, visit DESA
International’stechnicalservicewebsite
Note:Alltroubleshootingitemsarelistedin
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)
7. Piezo ignitor nut is loose
7. Tighten nut holding piezo ignitor. Nut
is located inside heater cabinet at top
When ignitor button is pressed in, there is a 1. Gas supply turned off or equipment 1. Turn on gas supply or open equipment
spark at ODS/pilot but no ignition shutoff valve closed shutoff valve
2. Control knob not fully pressed in while 2. Fully press in control knob while press-
pressing ignitor button (non-thermostat
models only)
ing ignitor button (non-thermostat mod-
els only)
Thermostat control knob not fully
pressed in while pressing ignitor button
(thermostat models only)
Fully press in thermostat control knob
while pressing ignitor button (thermo-
stat models only)
3. Air in gas lines when installed
3. Continue holding down control knob. Re-
peat igniting operation until air is removed
4. Clean ODS/pilot (see Cleaning and
Maintenance, page 14) or replace ODS/
pilot assembly
4. ODS/pilot is clogged
5. Gas regulator setting is not correct
5. Replace gas regulator
6. Thermostat control knob not in pilot 6. Turn thermostat control knob to pilot
position
position
ODS/pilot lights but flame goes out when 1. Control knob not fully pressed in
1. Press in control knob fully
control knob is released
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 1/4
trol valve
turn more
5. Pilot flame not touching thermocouple, 5. A) Contact local natural gas 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
8. Safety interlock system has been trig- 8. Wait one minute for safety interlock sys-
gered (thermostat models only)
tem to reset. Repeat ignition operation
Continued
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®
VENT-FREE NATURAL 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 natural gas company
Delayed ignition of burner(s)
1. Manifold pressure is too low
2. Burner orifice(s) is clogged
1. Contact local natural 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 natural 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
104246
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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
1. Heater burning vapors from paint, hair 1. Ventilate room. Stop using odor caus-
Heater produces unwanted odors
spray, glues, etc. See IMPORTANT
ing products while heater is running
statement above
2. Gas leak. SeeWarning statement at 2. Locate and correct all leaks (see Check-
top of page
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 natural gas company
3. Clean ODS/pilot (see Cleaning and
Maintenance, page 14)
Gas odor even when control knob is in OFF
position
1. Gas leak. SeeWarning statement at 1. Locate and correct all leaks (see Check-
top of page
ing Gas Connections, page 11)
2. Control valve defective
2. Replace control valve
Gas odor during combustion
1. Foreign matter between control valve 1. Take apart gas tubing and remove for-
and burner eign matter
2. Gas leak. SeeWarning statement at 2. Locate and correct all leaks (see Check-
top of page
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)
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®
VENT-FREE NATURAL GAS HEATER
14
ILLUSTRATED
PARTS
12
11
BREAKDOWN
16
VN1800ITB
20
17
15
22
4
10
9
8
6
19
18
21
7
5
13
3
6
2
21-1
A
1
B
C
21-11
21-9
21-2
21-14
21-15
21-10
21-4
21-3
21-13
21-12
21-6
21-5
21-8
21-7
104246
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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 22 of this manual.
PARTS LIST
VN1800ITB
KEY
PART
NO.
NUMBER
DESCRIPTION
QTY.
1
2
3
4
5
6
7
8
098304-01
098742-13
098238-06
101108-01
098198-03
M11084-26
098462-01
098457-01
099415-08
M11084-38
104617-01
098324-01
098325-01
097159-04
100537-02
098522-16
098271-03
104224-01
104197-01
099211-01
See Detail
099218-01
098508-01
099056-03
099048-01
099049-02
099050-01
100605-01
099387-06
100616-01
Screw, #10 x 3/8"
Front Panel
Grill Guard
Clip-Grill Guard
Apron
Screw, #10 x 3/8"
Control Rod Assembly
Reflector Assembly
Regulator
Screw, #8 x 3/8"
Cabinet Assembly
Control Knob
Roll Pin
Piezo Ignitor
Regulator Bracket
Thermostat Gas Valve
Ignitor Cable
SIT Tube
Inlet Tube
Hex-Head Screw
Burner Assembly
Burner
Valve Retainer Nut
Injector
Tubing-Valve to Plaque A
Tubing-Valve to Plaque B
Tubing-Valve to Plaque C
Control Valve
2
1
1
2
1
9
1
1
1
2
1
1
1
1
1
1
1
1
1
2
1
1
1
3
1
1
1
1
1
1
1
2
2
3
1
1
1
9
10
11
12
13
14
15
16
17
18
19
20
21
21-1
21-2
21-3
21-4
21-5
21-6
21-7
21-8
21-9
Pilot Tubing
Control Valve Tube
ODS/Pilot
Male Connector
Screw, #10 x 3/8"
Screw, #8 x 1/4"
Thermocouple
Ignitor Electrode
Mounting Bracket
21-10 103594-06
21-11 100615-01
21-12 M11084-26
21-13 M11084-37
21-14 098514-01
21-15 106842-01
22
099066-01
PARTS AVAILABLE - NOT SHOWN
100619-01
100619-03
100642-01
Thermostat Control Position Label
Control Position Label
Hardware Assembly
1
1
1
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®
VENT-FREE NATURAL GAS HEATER
14
ILLUSTRATED
PARTS
12
11
BREAKDOWN
VN2550ITB
16
20
17
15
22
4
10
9
8
6
19
18
21
7
5
13
3
6
21-1
2
A
1
B
C
D
21-12
21-10
21-8
21-2
21-15
21-16
21-4
21-3
21-13
21-11
21-5
21-14
21-9
21-7
21-6
104246
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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 22 of this manual.
PARTS LIST
VN2550ITB
KEY
NO.
PART
NUMBER
DESCRIPTION
QTY.
1
2
3
4
5
6
7
8
098304-01
098742-14
098238-07
101108-01
098198-04
Screw, #10 x 3/8"
Front Panel
Grill Guard
Clip-Grill Guard
Apron
2
1
1
2
1
9
1
1
1
2
1
1
1
1
1
1
1
1
1
2
1
1
1
4
1
1
1
1
1
1
1
1
2
4
2
1
1
1
M11084-26 Screw, #10 x 3/8"
098462-01
098457-05
099415-08
Control Rod Assembly
Reflector Assembly
Regulator
9
10
11
12
13
14
15
16
17
18
19
20
21
21-1
21-2
21-3
21-4
21-5
21-6
21-7
21-8
21-9
M11084-38 Screw, #8 x 3/8"
104617-02
098324-01
098325-01
097159-04
100537-02
098522-16
098271-03
104224-01
104197-01
099211-01
See Detail
099218-03
098508-01
099056-06
100620-01
100607-02
100608-01
100605-02
100616-02
099387-06
Cabinet Assembly
Control Knob
Roll Pin
Piezo Ignitor
Regulator Bracket
Thermostat Gas Valve
Cable Ignitor
SIT Tubing
Inlet Tubing
Hex-Head Screw
Burner Assembly
Burner
Valve Retainer Nut
Injector
Tubing-Valve to Plaque A
Tubing-Valve to Plaque B
Tubing-Valve to Plaque C
Control Valve
Control Valve Tube
Pilot Tubing
21-10 103594-07
21-11 100606-01
21-12 100615-01
21-13 M11084-37 Screw, #8 x 1/4"
21-14 M11084-26 Screw, #10 x 3/8"
21-15 098514-01
21-16 106842-01
22
ODS/Pilot
Tubing - Valve to Plaque D
Male Connector
Thermocouple
Ignitor Electrode
Mounting Bracket
099066-01
PARTS AVAILABLE - NOT SHOWN
100619-01
100619-02
100642-01
Thermostat Control Position Label
Control Position Label
Hardware Assembly
1
1
1
104246
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®
VENT-FREE NATURAL GAS HEATER
SPECIFICATIONS
REPLACEMENT
PARTS
VN1800ITB
6,600-18,000
Natural Only
Piezo
VN2550ITB
7,000-25,500
Natural Only
Piezo
Btu (Variable)
Type Gas
Ignition
Note: Use only original replacement parts.
Thiswillprotectyourwarrantycoveragefor
parts replaced under warranty.
Pressure Regulator Setting
Inlet Gas Pressure (in. of water)
Maximum
Minimum
Dimensions, Inches (H x W x D)
Heater
Carton
Weight (pounds)
Heater
6" W.C.
6" W.C.
PARTS UNDER WARRANTY
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.
10.5"
7"
10.5"
7"
23.5 x 18.5 x 8
25.8 x 21.3 x 10.1
23.5 x 25.9 x 8
25.8 x 28.7 x 10.1
When contacting your dealer or DESA In-
ternational, have ready:
24
29
32
38
• your name
Shipping
• your address
• model and serial numbers of your heater
• how heater was malfunctioning
• type of gas used (propane/LP or natural gas)
• purchase date
TECHNICAL
SERVICE
You may have further questions about in-
stallation, operation, or troubleshooting. If
so, contact DESA International’s Technical
Service Department at 1-800-323-5190.
SERVICE HINTS
When Gas Pressure Is Too Low
• pilot will not stay lit
Usually, we will ask you to return the defec-
tive part to the factory.
• burner(s) will have delayed ignition
• heater will not produce specified heat
PARTS NOT UNDER
WARRANTY
When Gas Quality Is Bad
• pilot will not stay lit
You can also visit DESA International’s
technical service web site at
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:
• burner(s) will produce flames and soot
• heater will backfire when lit
SERVICE
Youmayfeelyourgaspressureistoolowor
gas quality is bad. If so, contact your local
natural gas supplier.
PUBLICATIONS
• model number of your heater
• the replacement part number
Youcanpurchaseaservicemanualfromthe
address listed on the back page of this
manual. Send a check for $5.00 payable to
DESA International.
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OWNER’S MANUAL
ACCESSORIES
Purchasetheseheateraccessoriesfromyour
local dealer. If they can not supply these
accessories,callDESAInternational’sParts
Department at 1-800-972-7879 or write to
the address listed on the back page of this
manual for referral information.
FLOOR MOUNTING STAND
FAN KITS - GA3100(A,B) AND
GA3200T(A,B)
Models VN1800ITB - GA4000B
Models VN2550ITB - GA4010B
For all models. Provides better heat distri-
bution. Makes heater more efficient. Com-
plete installation and operating instructions
included.
For locating heater on the floor, away from
a wall. Complete installation instructions
provided with floor mounting stand.
EQUIPMENT SHUTOFF
VALVE - GA5010
Manually-controlled - GA3100(A,B). In-
cludes ON/OFF switch.
For all models. Equipment shutoff valve
with 1/8" NPT tap.
Thermostatically-controlled-GA32000T(A,B).
Includes three settings: ON/OFF/AUTO.
104246
23
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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
VANGUARD VENT-FREE NATURAL GAS HEATERS
DESA International warrants this product to be free from defects in materials and components for four (4) years from the date
offirstpurchase,providedthattheproducthasbeenproperlyinstalled,operatedandmaintainedinaccordancewithallapplicable
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
heatertoproperoperatingconditionandanallowanceforlaborwhenprovidedbyaDESAAuthorizedServiceCenter. 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.
Thiswarrantydoesnotapplytopartsthatarenotinoriginalconditionbecauseofnormalwearandtear,orpartsthatfailorbecome
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
LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES, INCLUDING WARRANTIES OF MER-
CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE TO FOUR (4) YEARS ON ALL COMPONENTS
FROM THE DATE OF FIRST PURCHASE; AND DESA INTERNATIONAL’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 DAMAGES.
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
104246-01
Rev. E
104246 01
03/00
NOT A UPC
Patent Pending
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