Desa Vanguard VN600BA Quick start guide

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BLUE FLAME
VENT-FREE NATURAL GAS HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
VN600BA
6000 Btu/Hr Manually-
Controlled Models
WARNING:Iftheinformationinthismanualis
not followed exactly, a fire or explosion may
result causing property damage, personal in-
jury, 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.
• Immediatelycallyourgassupplierfrom
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 per-
formed by a qualified installer, service
agency, or the gas supplier.
WARNING: Improper installa-
tion,adjustment,alteration,ser-
vice,ormaintenancecancause
injury or property damage. Re-
fer to this manual for correct
installationandoperationalpro-
cedures. For assistance or ad-
ditional information consult a
qualified installer, service
agency, or the gas supplier.
WARNING: This is an
unvented gas-fired heater. It
uses air (oxygen) from the
room in which it is installed.
Provisionsforadequatecom-
bustion and ventilation air
mustbeprovided.Referto Air
For Combustion and Ventila-
tion onpage4ofthismanual.
®
This appliance may be installed in an aftermarket*, permanently located, manufactured
(mobile) home, where not prohibited by local codes.
This appliance is only for use with the type of gas indicated on the rating plate. This
appliance is not convertible for use with other gases.
*Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer

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BLUE FLAME NATURAL GAS HEATER
®
Carbon Monoxide Poisoning: Early signs
ofcarbonmonoxidepoisoningresemblethe
flu, with headaches, dizziness, and/or nau-
sea. If you have these signs, the heater may
not be working properly. Get fresh air at
once! Have heater serviced. Some people
are more affected by carbon monoxide than
others. These include pregnant women,
peoplewithheartorlungdiseaseoranemia,
those under the influence of alcohol, and
those at high altitudes.
Natural Gas: Natural gas is odorless. An
odor-making agent is added to natural gas.
Theodorhelpsyoudetectanaturalgasleak.
However, the odor added to natural gas can
fade.Naturalgasmaybepresenteventhough
no odor exists.
Make certain you read and understand all
warnings.Keepthismanualforreference.It
isyourguidetosafeandproperoperationof
this heater.
SAFETY
INFORMATION
WARNINGS
IMPORTANT: Read this owner’s
manual carefully and completely
before trying to assemble, oper-
ate, or service this heater. Im-
proper use of this heater can
causeseriousinjuryordeathfrom
burns, fire, explosion, and car-
bon monoxide poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!
WARNING: Any change to
this heater or its controls can be
dangerous.
1. This appliance is only for use with the
typeofgas indicated on therating plate.
Thisappliance is not convertibleforuse
with other gases.
2. If you smell gas
• shut off gas supply
• do not try to light any appliance
• do not touch any electrical switch; do
not use any phone in your building
• immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions
• ifyoucannot reach your gas supplier,
call the fire department
3. This heater needsfresh, outside air ven-
tilation to run properly.This heater has
an oxygen depletion sensing (ODS)
safety shutoff system. The ODS shuts
down the heater if not enough fresh air
is available. See Air for Combustion
and Ventilation, pages 4 through 6.
4. Keep all air openings in front and bot-
tom of heater clear and free of debris.
This will insure enough air for proper
combustion.
5. If heater shuts off, do not relight until
you provide fresh, outside air. If heater
keeps shutting off, have it serviced.
6. Do not run heater
• where flammable liquids or vapors
are used or stored
• under dusty conditions
7. Before using furniture polish, wax,car-
pet cleaner, or similar products, turn
heater off. If heated, the vapors from
theseproductsmaycreate a white pow-
der residue within burner box or on
adjacent walls or furniture.
8. Do not use heater if any part has been
under water. Immediately call a quali-
fied service technician to inspect the
room heater and to replace any part of
the control system and any gas control
which has been under water.
9. Turn off heater and let cool before ser-
vicing. Only a qualified service person
should service and repair heater.
10. Operating heater above elevations of
4,500 feet could cause pilot outage.
Do not place clothing or other
flammable material on or near
the appliance. Never place any
objects on the heater.
Surface of heater becomes very
hot when running heater. Keep
children and adults away from
hot surface to avoid burns or
clothing ignition. Heater will re-
main hot for a time after shut-
down. Allow surface to cool be-
fore touching.
Carefully supervise young chil-
dren when they are in the same
room with heater.
Make sure grill guard is in place
before running heater.
Keeptheapplianceareaclearand
free from combustible materials,
gasoline and other flammable
vapors and liquids.
Due to high temperatures, the
appliance should be located out
oftrafficandawayfromfurniture
and draperies.
WARNING: Do not use any
accessory not approved for use
with this heater.

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OWNER’S MANUAL
PRODUCT
IDENTIFICATION
LOCAL CODES
Install and use heater with care. Follow all
local codes. In the absence of local codes, use
the latest edition of The National Fuel Gas
Code ANS Z223.1 also known as NFPA 54*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
Figure 1 - Vent-Free Natural Gas Heater
Heater
Cabinet
Grill Guard
Glass Panel
Front
Panel
Control Knob
Ignitor Button
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.
UNPACKING
PRODUCT
FEATURES
SAFETY DEVICE
This heater has a pilot with an Oxygen
DepletionSensing(ODS)safetyshutoffsys-
tem.The ODS/pilot is arequiredfeature for
vent-freeroomheaters.TheODS/pilotshuts
offtheheaterifthereisnotenoughfreshair.
PIEZO IGNITION SYSTEM
This heater has a piezo ignitor. This system
requires no matches, batteries, or other
sources to light heater.

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BLUE FLAME NATURAL GAS HEATER
®
Confined and Unconfined Space
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
cubicfeetper1,000Btuperhour(4.8m3per
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.
This heater shall not be installed in a con-
fined space or unusually tight construction
unlessprovisions are providedforadequate
combustion and ventilation air.
*Adjoiningroomsarecommunicatingonly
iftherearedoorlesspassagewaysorventila-
tion grills between them.
AIR FOR
COMBUSTION AND
VENTILATION
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.
Today’s homes are built more energy effi-
cient than ever. New materials, increased
insulation, and new construction methods
helpreduceheatlossinhomes.Homeowners
weatherstrip andcaulk aroundwindowsand
doorstokeepthecoldairoutandthewarmair
in. During heating months, home owners
want their homes as airtight as possible.
While it is good to make your home energy
efficient,yourhomeneedstobreathe.Fresh
air must enter your home. All fuel-burning
appliances need fresh air for proper com-
bustion and ventilation.
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.
PROVIDING ADEQUATE
VENTILATION
The following are excerpts from National
Fuel Gas Code. NFPA 54/ANS Z223.1, Sec-
tion5.3,AirforCombustionandVentilation.
Allspacesinhomesfallintooneofthethree
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
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.
Unusually tight construction is de-
fined as construction where:
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
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-
tionsforplumbing,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
three criteria above, proceed to De-
termining Fresh-Air Flow For Heater
Location, page 5 .

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OWNER’S MANUAL
WARNING:Iftheareainwhichtheheatermaybeoperatedissmallerthanthatdefinedasanunconfinedspace
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
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 18 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) = 2304 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: 2304 cu. ft. (volume of space) ÷50 cu. ft. = 46.1 or 46,100 (maximum Btu/Hr the space can support)
3. Add the Btu/Hr of all fuel burning appliances in the space.
Vent-free heater _______________ Btu/Hr
Gas water heater* _______________ Btu/Hr
Gas furnace _______________ Btu/Hr
Vented gas heater _______________ Btu/Hr
Gas fireplace logs _______________ Btu/Hr
Other gas appliances*+_______________ Btu/Hr
Total =_______________ Btu/Hr
* Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors and vents to the outdoors.
4. Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used.
____________Btu/Hr (maximum the space can support)
____________Btu/Hr (actual amount of Btu/Hr used)
Example: 46,100 Btu/Hr (maximum the space can support)
50,000 Btu/Hr (actual amount of Btu/Hr used)
ThespaceintheaboveexampleisaconfinedspacebecausetheactualBtu/HrusedismorethanthemaximumBtu/Hrthespacecan 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.
Example:
Gas water heater 44,000 Btu/Hr
Vent-free heater +6,000 Btu/Hr
Total =50,000 Btu/Hr

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BLUE FLAME NATURAL GAS HEATER
®
Figure 2 - Ventilation Air from Inside Building
Or
Remove
Door into
Adjoining
Room,
Option 3
Ventilation Grills
Into Adjoining Room,
Option 2
12"
12"
Ventilation
Grills
into Adjoining
Room,
Option 1
AIR FOR
COMBUSTION AND
VENTILATION
Continued
VENTILATION AIR
Ventilation Air From Inside
Building
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
(seeoptions1and2,Figure2).Youcanalso
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.
WARNING: Rework work-
sheet, adding the space of the
adjoiningunconfinedspace.The
combined spaces must have
enough fresh air to supply all
appliances in both spaces.
Figure 3 - Ventilation Air from Outdoors
Outlet
Air Ventilated
Attic
Outlet
Air
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic
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.
Connecttheseitemsdirectlytotheoutdoors
orspacesopentotheoutdoors.Thesespaces
include attics and crawl spaces. Follow the
National Fuel Gas Code NFPA 54/ANS
Z223.1, Section 5.3, Air for Combustion
and Ventilation for required size of ventila-
tion grills or ducts.
IMPORTANT: Do not provide openings for
inletoroutletairintoatticifattichasathermo-
stat-controlled power vent. Heated air enter-
ing the attic will activate the power vent.

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OWNER’S MANUAL
Figure 5 - Mounting Screw Locations
Mounting
Screw
Locations
8 7/8"
Minimum To
Maintain 6"
Clearance
From Wall
7 3/4"
20 1/4"
Minimum To
Maintain 3"
Clearance
From Floor
FLOOR
JOINING WALL
INSTALLING HEATER TO
WALL
Marking Screw Locations
1. Determine whereyouwill locate heater.
2. Mark two mounting screw locations on
wall (see Figure 5).
WARNING:Maintainminimum
clearances shown in Figure 5. If
you can, provide greater clear-
ancesfromfloorandjoiningwall.
Forconvenienceandefficiency,installheater
• where there is easy access for operation,
inspection, and service
• in coldest part of room
Figure4-MountingClearancesAsViewed
From Front of Heater
36"
3"
FLOOR
CEILING
Minimum
Minimum T
Of Carpetin
Combustib
6"
Minimum
From
Sides Of
Heater
Right
Side
Left
Side
INSTALLATION
CHECK GAS TYPE
Use only natural gas. If your gas supply is
notnatural, donotinstall heater.Calldealer
where you bought heater for proper type
heater.
INSTALLATION ITEMS
Beforeinstallingheater,makesureyouhave
the items listed below:
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• ground joint union
• 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 A.G.A. design-
certifiedequipmentshutoffvalvefromyour
dealer. See Accessory, page 18.
WARNING: A qualified ser-
vice person must install heater.
Follow all local codes.
LOCATING HEATER
This heater is designed to be mounted on a
wall.
WARNING:Maintainthemini-
mumclearancesshowninFigure
4.Ifyoucan,providegreaterclear-
ancesfromfloor,ceiling,andjoin-
ing wall.
CAUTION: If you install the
heater in a home garage
• heater pilot and burner must
be at least 18 inches above
floor
• locateheaterwheremovingve-
hicle will not hit it
IMPORTANT: Vent-freeheatersaddmois-
ture to the air. Although this is beneficial,
installing heater in rooms without enough
ventilation air may cause mildew to form
from too much moisture. See Air for Com-
bustion and Ventilation, pages 4 through 6.
WARNING: Never install the
heater
• 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
Minimum To
Top Surface
Of Carpeting,
Tile Or Other
Combustible
Material
Continued
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.
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
heatsource.Ifyouhave 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.

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104271
BLUE FLAME NATURAL GAS HEATER
®
Installing Two Mounting Screws
Note: Wall anchors and mounting screws
areinhardwarepackage.Thehardwarepack-
age is provided with heater.
Attaching To Wall Stud Method
For attaching mounting screw to wall stud
1. Drill holeat markedlocation using9/64"
drill bit.
2. Insert mounting screw into wall stud.
3. Tighten screw until 1/16" space (thick-
ness of penny) is between screwhead
and wall.
Attaching To Wall Anchor Method
Follow instructions below to attach mount-
ing screws to hollow walls (wall areas be-
tween studs) or solid walls (concrete or
masonry).
1. Drill holes at marked locations using
5/16"drillbit.For solid walls (concrete
or masonry), drill at least 1 1/4" deep.
2. Fold wall anchor (see Figure 6).
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 anchorwings (seeFigure7).
IMPORTANT: Do not hammer key!
Forthick walls (over1/2"thick) or solid
walls, do not pop open wings.
5. Tighten two screws until 1/16" space
(thickness of penny) is between
screwheads and wall (see Figure 8).
Figure 6 - Folding Anchor
Figure 7 - Popping Open Anchor Wings
For Thin Walls
Thin Walls (1/4" to 1/2" thick)
ANCHOR
Thin or
Thick Wall
(thick wall
shown)
Solid
Wall
1/16"
Space
Figure 8 - Tightening Anchors
INSTALLATION
Continued
Placing Heater On Mounting
Screws
1. Locate two keyhole slots on back panel
of heater (see Figure 9).
2. Place large openings of slots over
screwheads. Slide heater down until
screws are in small portion of slots.
Figure 11 - Installing Bottom Mounting
Screw
Figure 9 - Location Of Keyhole Slots On
Back Panel Of Heater
Removing Front Panel Of Heater
1. Remove two screws near bottom cor-
ners of front panel.
2. Liftstraightupongrillguarduntilitstops.
Grill guard will slide up about 1/4".
3. Pull bottomoffront panel forward,then
down.
Keyhole Slots
Installing Bottom Mounting
Screw
1. Locate bottom mounting hole. This
hole is near bottom on back panel of
heater (see Figure 11).
2. Mark screw location on wall.
3. Remove heater from wall.
4. If installing bottom mounting screw
into hollow or solid wall, install wall
anchor. Follow steps 1 through 5 un-
der Attaching To Wall Anchor Method.
If installing bottom mounting screw
into wall stud, drill hole at marked lo-
cation using 9/64" drill bit.
5. Replace heater on wall.
6. Insert bottom anchor screw through
backpanel into bottomanchoror drilled
hole (see Figure 11).
7. Tighten screw until heater is firmly se-
cured to wall. Do not over tighten.
Note: Do not replace front panel at this
time. Replace front panel after making
gas connections and checking for leaks
(see pages 9 and 10).
Figure 10 - Removing Front Panel Of
Heater

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104271
OWNER’S MANUAL
* ACSA/AGAdesign-certifiedequipmentshutoffvalvewith1/8"NPTtapisanacceptable
alternative to test gauge connection. Purchase the optional CSA/AGA design-certified
equipment shutoff valve from your dealer. See Accessory, page 18.
Tee Joint
Reducer
Bushing to
1/8" NPT
1/8" NPT
Plug Tap
Test
Gauge
Connection *
Pressure
Regulator
Tee
Joint
Pipe
Nipple
Cap
Sediment Trap
Heater
Cabinet
3/8" NPT
Pipe Nipple
Ground Joint Union
Equipment
Shutoff
Valve *
From
Gas Meter
(4" W.C. to
10.5" W.C.
Pressure)
Figure 12 - Gas Connection
3" Minimum
CONNECTING TO GAS
SUPPLY
WARNING:Aqualifiedservice
person must connect heater to
gassupply.Followalllocalcodes.
IMPORTANT :Checkgas line pressurebe-
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.
Installationmustincludeaequipmentshutoff
valve,groundjoint union, and plugged 1/8"
NPT tap. Locate NPT tap within reach for
test gauge hook up. NPT tap must be up-
stream from heater (see Figure 12). An
appliancemaingasvalve(equipmentshutoff
valve) shall be provided in an accessible
location for turning on or shutting off the
gas to the appliance.
IMPORTANT: Installanequipmentshutoff
valve in an accessible location. The equip-
ment shutoff valve is for turning on or
shutting off the gas to the appliance.
CAUTION: Use only new,
black iron or steel pipe. Inter-
nally-tinned copper tubing may
be used in certain areas. Check
your local codes. Use pipe 3/8"
diameter or greater to allow
proper gas volume to heater. If
pipe is too small, undue loss of
pressure will occur.
WARNING: Never connect
heater to private (non-utility) gas
wells. This gas is commonly
known as wellhead gas.
CAUTION:Usepipejointseal-
ant that is resistant to liquid pe-
troleum (LP) gas.
Continued
INSTALLATION
Continued
Install sediment trap (trap) in supply line as
shown in Figure 12. Locate sediment trap
whereitiswithinreachforcleaning.Locate
sediment trap where trapped matter is not
likelyto freeze.A sedimenttrap trapsmois-
ture and contaminants. This keeps them
fromgoinginto heater controls. If sediment
trap is not installed or is installed wrong,
heater may not run properly.
IMPORTANT: Hold pressure regulator
with wrench when connecting it to gas pip-
ing and/or fittings.
WARNING:Thisappliancere-
quires a 3/8" NPT (National Pipe
Thread) inlet connection to the
pressure regulator.
Apply pipe joint sealant lightly to male
threads. This will prevent excess sealant
fromgoing into pipe. Excesssealantin pipe
could result in clogged heater valves.

10
104271
BLUE FLAME NATURAL GAS HEATER
®
CHECKING GAS
CONNECTIONS
WARNING: Test all gas pip-
ing and connections for leaks
after installing or servicing. Cor-
rect all leaks at once.
WARNING: Never use an
open 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.
Pressure Testing Gas Supply
Piping System
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1. Disconnect appliance with its appliance
maingasvalve(controlvalve)andequip-
ment shutoff valve from gas supply pip-
ingsystem.Pressuresinexcessof1/2psig
will damage heater regulator.
2. Cap off open end of gas pipe where
equipmentshutoffvalve was connected.
3. Pressurizesupplypiping system by either
usingcompressedairoropeningmaingas
valve located on or near gas meter.
4. Check all joints of gas supply piping
system. Apply mixture of liquid soap
and water to gas joints. Bubbles form-
ing show a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment
shutoff valve to gas supply. Check re-
connected fittings for leaks.
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipmentshutoffvalve(seeFig-
ure 13).
2. Pressurize supply piping system by ei-
ther using compressed air or opening
main gas valve located on or near gas
meter.
3. Check all joints from gas meter to
equipment shutoff valve (see Figure
14). Apply mixture of liquid soap and
water to gas joints. Bubbles forming
show a leak.
4. Correct all leaks at once.
Pressure Testing Heater Gas
Connections
1. Open equipmentshutoffvalve(seeFig-
ure 13).
2. Open main gas valve located on or near
gas meter.
3. Make sure control knob of heater is in
the OFF position.
4. Check alljointsfrom equipment shutoff
valve to control valve (see Figure 14).
Apply mixture of liquid soap and wa-
ter to gas joints. Bubbles forming show
a leak.
5. Correct all leaks at once.
6. Light heater (see Operating Heater,
pages 10 and 11). Check the rest of the
internal joints for leaks.
7. Turn off heater (see To Turn Off Gas
To Appliance, page 11).
8. Replace front panel.
O
N
POSI
T
O
PO
S
Figure 13 - Equipment Shutoff Valve
Equipment
Shutoff
Valve
Open
Closed
Figure 14 - Checking Gas Joints
Control Valve Location
Gas Meter
Equipment
Shutoff
Valve
OPERATING
HEATER
FOR YOUR SAFETY
READ BEFORE
LIGHTING
A. Thisappliancehas apilotwhichmust
belighted byhand.Whenlighting the
pilot,followtheseinstructionsexactly.
B. BEFORE LIGHTING smell all
aroundtheapplianceareaforgas.Be
suretosmellnexttothefloor because
some gas is heavier than air and will
settle on the floor.
WHAT TO DO IF YOU SMELL
GAS
• Do not try to light any appliance.
• Donottouchanyelectricswitch;do
notuseanyphone in yourbuilding.
• Immediatelycall yourgassupplier
from a neighbor’s phone. Follow
the gas supplier’s instructions.
• If you cannot reach your gas sup-
plier, call the fire department.
C. Useonlyyour handtopushin or turn
thegascontrolknob. Neverusetools.
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.
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.
WARNING: If you do not fol-
low these instructions exactly, a
fireorexplosionmayresultcaus-
ing property damage, personal
injury or loss of life.
INSTALLATION
Continued

11
104271
OWNER’S MANUAL
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
1. Turncontrolknob clockwise
Clockwise
to the PILOT position.
2. Pressin controlknob and turnclock-
wise
Clockwise
to the OFF position.
Shutting Off Burner Only (pilot
stays lit)
Turn control knob clockwise
Clockwise
to
the PILOT position.
Thermocouple Pilot Burner
Ignitor Electrode
Figure 16 - Pilot
OPERATING
HEATER
Continued
CAUTION: Do not try to ad-
just heating levels by using the
equipment shutoff valve.
LIGHTING
INSTRUCTIONS
1. STOP! Read the safety information
page 10, column 3.
2. Make sure equipment shutoff valve
is fully open.
3. Turncontrolknobclockwise
Clockwise
to the OFF position.
4. Wait five(5) 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 at the top of column 3,
page 10. If you don’t smell gas, go to
the next step.
5. Pressin controlknobandturncoun-
terclockwise
C-clockwise
to the PILOT
position. Keep control knob pressed
inforfive(5) seconds (see Figure15).
Note: You may be running this
heater for the first time after hook-
ing up to gas supply. If so, the con-
trol knob may need to be pressed in
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 gas supplier for
repairs.
6. With control knob pressed in, push
downandreleaseignitorbutton.This
will light pilot. The pilot is attached
to the front of burner. The pilot can
be seen through the glass panel. If
needed,keeppressingignitor button
until pilot lights.
Note: If pilot does not stay lit, refer
toTroubleshooting, pages 13 through
15. Also contact a qualified service
person or gas supplier for repairs.
Until repairs are made, light pilot
withmatch.To lightpilotwith match,
see Manual Lighting Procedure.
OFF
HIGH
PILOT
LOW
IGNITOR
Control Knob
Figure 15 - Control Knob In The OFF
Position
Ignitor Button
1. Remove front panel (see Figure 10,
page 8).
2. Followsteps1 through5 under Light-
ing Instructions.
3. With control knob pressed in, strike
match. Hold match to pilot until pi-
lot lights.
4. Keep control knob pressed in for 30
secondsafter pilot is lit.After30 sec-
onds, release control knob. Follow
step 8 under Lighting Instructions.
5. Replace front panel.
MANUAL LIGHTING
PROCEDURE
7. 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.
8. Turn control knob counterclockwise
C-clockwise
to the HIGH position. The
mainburner should light. Set control
knobto anyheatlevelbetweenHIGH
andLOW.To turncontrolknobfrom
HIGH to a lower setting, press in the
controlknob and turncounterclock-
wise
C-clockwise
.
Note: Both HIGH and LOW are
locked positions. You must press in
control knob before turning it from
these positions.

12
104271
BLUE FLAME NATURAL GAS HEATER
®
INSPECTING
BURNER
Check pilot flame pattern and burner flame
pattern often.
PILOT FLAME PATTERN
Figure17showsacorrectpilotflamepattern.
Figure 18 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 18
• turn heater off (see To Turn Off Gas to
Appliance, page 11)
• seeTroubleshooting, pages 13through15
Thermocouple
GRH/OV 009GOOD PILOT
Thermocouple
Pilot Burner
GRH/OV 008BAD PILOT/LP
Pilot Burner
Figure 17 - Correct Pilot Flame Pattern
Figure 18 - Incorrect Pilot Flame Pattern
1/2 GLASS HEIGHT
BURNER FLAME PATTERN
Figure 19 shows a correct burner flame
pattern.Figure20showsanincorrectburner
flame pattern. The incorrect burner flame
patternshowsyellowtippingoftheflame.It
also shows the flame higher than 1/2 the
glass panel height.
Ifburnerflamepatternisincorrect,asshown
in Figure 20
• turn heater off (see To Turn Off Gas to
Appliance, page 11)
• seeTroubleshooting, pages13through 15
WARNING: If yellow tipping
occurs, your heater could pro-
duce increased levels of carbon
monoxide.Ifburnerflamepattern
shows yellow tipping, follow in-
structions at bottom of this page.
NOTICE: Do not mistake orange
flames with yellow tipping. Dust
or other fine particles enter the
heater and burn causing brief
patches of orange flame.
Figure 19 - Correct Burner Flame Pattern
Figure20-IncorrectBurnerFlamePattern
Yellow
Tipping
1/2 GLASS HEIGHT
CLEANING AND
MAINTENANCE
ODS/PILOT AND BURNER
ORIFICE
• Use a vacuum cleaner, pressurized air,
or small, soft bristled brush to clean.
WARNING: Turn off heater
and let cool before cleaning.
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.
CLEANING BURNER
PILOT AIR INLET HOLE
We recommend that you clean the unit every
2,500hoursofoperationoreverythreemonths.
Wealsorecommendthatyoukeeptheburner
tubeandpilotassemblycleanandfreeofdust
anddirt. Tocleanthese partswe recommend
usingcompressedair 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.
Ifyoudon'tfollowdirectionsonthecan, you
could damage the pilot assembly.
1. Shut off the unit, including the pilot.
Allow the unit to cool for at least thirty
minutes.
2. Inspect burner, pilot for dust and dirt.
3. Blow air through the ports/slots and
holes in the burner.
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 21). With the unit off, lightly
blowair through theairinlet hole. Youmay
blowthroughadrinkingstrawifcompressed
air is not available.
Figure 21 - Pilot Inlet Air Hole
Pilot Assembly
Pilot Air Inlet Hole

13
104271
OWNER’S MANUAL
Continued
TROUBLESHOOTING WARNING: Turn off heater
andletcoolbeforeservicing.Only
aqualifiedservicepersonshould
service and repair heater.
POSSIBLE CAUSE
1. Ignitor cable pinched or wet
2. Ignitor electrode not connected to igni-
tor cable
3. Piezo ignitor nut is loose
4. Broken ignitor cable
5. Ignitor electrode broken
6. Bad piezo ignitor
7. Ignitor electrode positioned wrong
1. Gas supply turned off or equipment
shutoff valve closed
2. Control knob not in PILOT position
3. Control knob not pressed in while in
PILOT position
4. Air in gas lines when installed
5. ODS/pilot is clogged
6. Gas regulator setting is not correct
1. Control knob not fully pressed in
2. Control knob notpressed in long enough
3. Equipment shutoff valve not fully open
4. Thermocouple connection loose at con-
trol valve
5. Pilot flame not touching thermocouple,
which allows thermocouple to cool,
causing pilot flame to go out. This prob-
lem could be caused by one or both of
the following:
A) Low gas pressure
B) Dirty or partially clogged ODS/pilot
6. Thermocouple damaged
7. Control valve damaged
REMEDY
1. Free ignitor cable if pinched by any
metal or tubing. Keep ignitor cable dry
2. Reconnect ignitor cable
3. Tighten nut holding piezo ignitor to
heater cabinet. Nut is located inside
heater cabinet at top
4. Replace ignitor cable
5. Replace ignitor
6. Replace piezo ignitor
7. Replace ignitor
1. Turn on gas supply or open equipment
shutoff valve
2. Turn control knob to PILOT position
3. Press in control knob while in PILOT
position
4. Continue holding down control knob.
Repeat igniting operation until air is re-
moved
5. Clean ODS/pilot (see Cleaning and
Maintenance, page 12) or replace ODS/
pilot assembly
6. Replace gas regulator
1. Press in control knob fully
2. After ODS/pilot lights, keep control
knob pressed in 30 seconds
3. Fully open equipment shutoff valve
4. Hand tighten until snug, then tighten 1/4
turn more
5. A) Contact local natural gas company
B) Clean ODS/pilot (see Cleaning and
Maintenance, page 12) or replace ODS/
pilot assembly
6. Replace thermocouple
7. Replace control valve
OBSERVED PROBLEM
When ignitor button is pressed, there is no
spark at ODS/pilot
When ignitor button is pressed, there is
spark at ODS/pilot but no ignition
ODS/pilot lights but flame goes out when
control knob is released
CAUTION: Never use a wire,
needle, or similar object to clean
ODS/pilot.ThiscandamageODS/
pilot unit.
Note: For additional help, visit DESA
International’stechnicalservicewebsite
at www.desatech.com.
Note: Alltroubleshootingitemsarelistedin
order of operation.
www.desatech.com

14
104271
BLUE FLAME NATURAL GAS HEATER
®
OBSERVED PROBLEM
Burner does not light after ODS/pilot is lit
Delayed ignition of burner
Burner backfiring during combustion
Yellow flame during burner combustion
Slightsmoke orodorduring initialoperation
Heater produces a whistling noise when
burner is lit
Heater produces a clicking/ticking noise
just after burner is lit or shut off
Whitepowderresidueformingwithinburner
box or on adjacent walls or furniture
REMEDY
1. Clean burner orifice (see Cleaning and
Maintenance,page 12) or replace burner
orifice
2. Replace burner orifice
3. Contact local natural gas company
1. Contact local natural gas company
2. Clean burner orifice (see Cleaning and
Maintenance,page 12) or replace burner
orifice
1. Clean burner orifice (see Cleaning and
Maintenance,page 12) or replace burner
orifice
2. Contact local natural gas company
3. Replace burner
4. Replace gas regulator
1. Check burner for dirt and debris. If
found, clean burner (see Cleaning and
Maintenance, page 12)
2. Contact local natural gas company
3. Replace gas regulator
1. Problem will stop after a few hours of
operation
1. Turn control knob to LOW position and
let warm up for a minute
2. Operateburneruntilair is removed from
line. Have gas checked by local natural
gas company
3. Observe minimum installation clear-
ances (see Figure 4, page 7)
4. Clean burner (see Cleaning and Mainte-
nance, page 12) or replace burner orifice
1. This is common with most heaters. If
noise is excessive, contact qualified ser-
vice person
1. Turn heater off when using furniture
polish, wax, carpet cleaners, or similar
products
POSSIBLE CAUSE
1. Burner orifice is clogged
2. Burner orifice diameter is too small
3. Inlet gas pressure is too low
1. Manifold pressure is too low
2. Burner orifice is clogged
1. Burner orifice is clogged or damaged
2. Inlet gas pressure is too low
3. Burner damaged
4. Gas regulator defective
1. Not enough air
2. Inlet gas pressure is too low
3. Gas regulator defective
1. Residues from manufacturing processes
1. Turning control knob to HIGH position
when burner is cold
2. Air in gas line
3. Air passageways on heater blocked
4. Dirty or partially clogged burner orifice
1. Metal expanding while heating or con-
tracting while cooling
1. When heated, vapors fromfurniturepol-
ish, wax, carpet cleaners, etc. turn into
white powder residue
TROUBLESHOOTING
Continued
www.desatech.com

15
104271
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.
www.desatech.com
OBSERVED PROBLEM
Heater produces unwanted odors
Heater shuts off in use (ODS operates)
Gas odor even when control knob is in OFF
position
Gas odor during combustion
Moisture/condensationnoticedonwindows
POSSIBLE CAUSE
1. Heater burning vapors from paint, hair
spray, glues, etc. See IMPORTANT
statement above
2. Gas leak. SeeWarning statement at
top of page
1. Not enough fresh air is available
2. Low line pressure
3. ODS/pilot is partially clogged
1. Gas leak. SeeWarning statement at
top of page
2. Control valve defective
1. Foreign matter between control valve
and burner
2. Gas leak. SeeWarning statement at
top of page
1. Not enough combustion/ventilation air
REMEDY
1. Ventilate room. Stop using odor-causing
products while heater is running
2. Locate and correct all leaks (see Check-
ing Gas Connections, page 10)
1. Open windowand/or door forventilation
2. Contact local natural gas company
3. Clean ODS/pilot (see Cleaning and
Maintenance, page 12)
1. Locate and correct all leaks (see Check-
ing Gas Connections, page 10)
2. Replace control valve
1. Take apart gas tubing and remove for-
eign matter
2. Locate and correct all leaks (see Check-
ing Gas Connections, page 10)
1. Refer to Air for Combustion and Venti-
lation requirements (page 4)

16
104271
BLUE FLAME NATURAL GAS HEATER
®
12-2
12-1
ILLUSTRATED
PARTS
BREAKDOWN
VN600BA
10
12
11
1
2
3
4
5
6
79
8
10
13 14
15
17
18
21 22
25
20
24
23
19
26
27
16

17
104271
OWNER’S MANUAL
PARTS LIST This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
listed under Replacement Parts on page 18 of this manual.
VN600BA
KEY PART
NO. NUMBER DESCRIPTION QTY.
1 098304-01 Screw, #10 x 3/8" 2
2 099467-03 Front Panel Assembly
3 099318-04 Grill Guard 1
4 101108-01 Grill Guard Clip 2
5 102017-02 Bottom Glass Retainer 1
6 098260-11 Glass Panel 1
7 098532-06AA Top Glass Retainer 1
8 M11084-38 Screw, #8 x 3/8" 8
9 098352-03BR Deflector Unit 1
10 098271-03 Ignitor Cable 1
11 098249-01 Nut, M5 2
12 099440-03 ODS/Pilot Assembly 1
12-1 098514-01 Thermocouple 1
12-2 098594-01 Ignitor Electrode 1
13 104263-01 Burner 1
14 099387-05 Pilot Tubing 1
15 104259-03 Injector, 1 piece 1
16 NJF-8C Hex Nut 1
17 099415-14 Pressure Regulator 1
18 099462-01 Burner Tubing 1
19 099391-02 Regulator Tubing 1
20 099413-01 Control Valve 1
21 099468-16 Cabinet 1
22 097159-04 Piezo Ignitor 1
23 099393-02 Control Knob 1
24 098508-01 Valve Retainer Nut 1
25 098303-02 Screw, #6 x 5/16" 2
26 099553-01 Pilot Shield 1
27 099818-01 Internal Tooth Washer 1
PARTS AVAILABLE - NOT SHOWN
099395-09 Control Position Label 1
100642-02 Assembly, Hardware 1

18
104271
BLUE FLAME NATURAL GAS HEATER
®
Note: Use only original replacement parts.
This will protect your warranty coverage
for parts replaced under warranty.
PARTS UNDER WARRANTY
Contactauthorizeddealerfromwhomyou
purchased this product. If they cannot
supply original replacement part(s), call
DESA International’s Technical Service
Department at 1-800-323-5190 for refer-
ral information.
When contacting your dealer or DESA In-
ternational, have ready:
• your name
• your address
• model and serial numbers of your heater
• how heater was malfunctioning
• type of gas used (propane/LP or natural
gas)
• purchase date
Usually,wewillaskyoutoreturnthedefec-
tive part to the factory.
PARTS NOT UNDER
WARRANTY
Contact authorized dealers of this product.
If they cannot supply original replacement
part(s), call DESA International’s Parts
Department at 1-800-972-7879 for referral
information.
When calling DESA International, have
ready:
• model number of your heater
• the replacement part number
REPLACEMENT
PARTS
EQUIPMENT SHUTOFF
VALVE - GA5010
Equipmentshutoffvalvewith1/8"NPTtap.
SERVICE
PUBLICATIONS
Youcanpurchaseaservicemanualfromthe
address listed on the back page of this
manual. Send a check for $5.00 payable to
DESA International.
ACCESSORY
Purchase this heater accessory from your
local dealer. If they cannot supply this ac-
cessory, call DESA International’s Parts
Department at 1-800-972-7879 for referral
information. You can also write to the ad-
dresslisted onthe backpage ofthis manual.
TECHNICAL
SERVICE
You may have further questions about in-
stallation, operation, or troubleshooting. If
so,contact DESAInternational’s Technical
Service Department at 1-800-323-5190.
You can also visit DESA International’s
technical service web site at
www.desatech.com.
SPECIFICATIONS
When Gas Pressure Is Too Low
• pilot will not stay lit
• burner will have delayed ignition
• heater will not produce specified heat
When Gas Quality Is Bad
• pilot will not stay lit
• burner will produce flames and soot
• heater will backfire when lit
Youmayfeelyourgaspressureistoolowor
gas quality is bad. If so, contact your local
natural gas supplier.
SERVICE HINTS
VN600BA
Btu (Variable) 4,400/6,000
Type Gas Natural Only
Ignition Piezo
Pressure Regulator Setting 3" W.C.
Inlet Gas Pressure (inches of water)
Maximum 10.5"
Minimum 4"
Dimensions, Inches (H x W x D)
Heater (including knobs and grill) 21 1/2x 13 1/2x 7
Carton 24 3/4x 16 3/4x 7 1/2
Weight (pounds)
Heater 13.5
Shipping 19

19
104271
OWNER’S MANUAL
NOTES
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_______________________________________________________________________________________________

2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
www.desatech.com
104271-01
Rev. D
03/00
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.
KEEP THIS WARRANTY
Model
Serial No.
Date Purchased
WARRANTY INFORMATION
INTERNATIONAL
LIMITED WARRANTY
VENT-FREE RESIDENTIAL GAS HEATERS
DESA International warrants this product to be free from defects in materials and components for four (4) years and five (5) years on
stainless steel burners from the date of first purchase, provided that the product has been properly installed, operated and maintained
inaccordancewithallapplicableinstructions.TomakeaclaimunderthiswarrantytheBillofSaleorcancelledcheckmustbepresented.
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.
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, transportationandanyandallsuchothercostsrelatedto repairingadefectiveheaterwillbetheresponsibilityoftheowner.
TOTHEFULLEXTENTALLOWEDBYTHELAWOFTHEJURISDICTIONTHATGOVERNSTHESALEOFTHEPRODUCT;
THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED WARRANTIES AND LIMITS THE
DURATION OF ANY AND ALL IMPLIED WARRANTIES, INCLUDING WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE TO FOUR (4) YEARS ON ALL COMPONENTS AND FIVE (5) YEARS ON
STAINLESS STEEL BURNERS FROM THE DATE OF FIRST PURCHASE; AND DESA INTERNATIONAL’S LIABILITY IS
HEREBYLIMITEDTOTHEPURCHASEPRICEOFTHEPRODUCTANDDESAINTERNATIONALSHALLNOTBELIABLE
FORANYOTHERDAMAGESWHATSOEVERINCLUDINGINDIRECT,INCIDENTALORCONSEQUENTIALDAMAGES.
Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation of incidental or
consequentialdamages,sotheabovelimitationonimpliedwarranties,orexclusionorlimitationondamagesmaynotapplytoyou.
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:
NOT A UPC
104271 01