Vanguard VMH3000TPS Quick start guide

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VENT-FREE PROPANE/LP GAS
MINI-HEARTH®HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
VMH3000TPS
Shown With Optional
Mantel Which Features
a Built-In Base
This appliance may be installed in an aftermarket* manufactured (mobile) home, where not prohibited by state
or local codes.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer. (I.E. Installation of this product is permitted after the
manufactured (mobile) home is sited).
®
WARNING: If the information in this manual is not fol-
lowed exactly, a fire or explosion may result causing
property damage, personal injury, or loss of life.
— Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s in-
structions.
• If you cannot reach your gas supplier, call the fire
department.
— Installation and service must be performed by a
qualifiedinstaller,serviceagency,orthegassupplier.
WARNING: Improper installation,
adjustment, alteration, service, or
maintenance can cause injury or
property damage. Refer to this
manualforcorrectinstallationand
operational procedures. For as-
sistance or additional information
consult a qualified installer, ser-
vice agency, or the gas supplier.
WARNING: This is an unvented
gas-fired heater. It uses air (oxy-
gen) from the room in which it is
installed. Provisions for adequate
combustion and ventilation air
must be provided. Refer to Air for
Combustion and Ventilation sec-
tion on page 5 of this manual.
®
15,000 to 30,000 Btu/Hr
withThermostat

2
106056-01
GAS RESIDENTIAL HEATERS
®
LOCAL CODES
Install and use heater with care. Follow all
localcodes.Intheabsenceoflocalcodes,use
the latest edition of The National Fuel Gas
CodeANSZ223.1,alsoknownasNFPA54*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
PRODUCT
FEATURES
SAFETY DEVICE
This heater has a pilot with an Oxygen
Depletion Sensor Shutoff System (ODS).
TheODS/pilotisarequiredfeatureforvent-
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.
THERMOSTATIC HEAT
CONTROL
This heater has a thermostat sensing bulb
andacontrolvalve.Thisresultsinthegreat-
est heater comfort. This can also result in
lower gas bills.
1. This appliance is only for use with the
typeof gas indicatedon the ratingplate.
Thisappliance is notconvertible for use
with other gases.
2. Do not placepropane/LPsupply tank(s)
inside any structure. Locate propane/
LP supply tank(s) outdoors.
3. If you smell gas
• shut off gas supply
• do not try to light any appliance
SAFETY
INFORMATION
Carbon Monoxide Poisoning: Early
signs of carbon monoxide poisoning re-
semble the flu, with headaches, dizziness,
ornausea.Ifyouhavethesesigns,theheater
maynot beworkingproperly.Getfreshair
at once! Have heater serviced. Some
peoplearemoreaffectedbycarbonmonox-
ide than others. These include pregnant
women,peoplewithheartorlungdiseaseor
anemia, those under the influence of alco-
hol, and those at high altitudes.
Propane/LPGas:Propane/LPgasisodor-
less.An odor-makingagent is added to gas.
The odor helps you detect a gas leak. How-
ever, the odor added to gas can fade. Gas
may be present even though no odor exists.
Make certain you read and understand all
Warnings. Keep this manual for reference.
Itis yourguide to safeand properoperation
of this heater.
• 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
• ifyou cannot reachyour gassupplier,
call the fire department
4. This heater shall not be installed in a
bedroom or bathroom.
5. Never install the heater
• in a recreational vehicle.
• wherecurtains, furniture, clothing,or
otherflammable objectsare lessthan
36inches fromthe front, top, or sides
of the heater.
• as a fireplace insert.
• in high traffic areas.
• in windy or drafty areas.
6. This heater needs fresh, outside air ven-
tilation to run properly. This heater has
anoxygen depletionsensor (ODS) pilot
light safety system. The ODS shuts
down the heater if not enough fresh air
is available. See Fresh Air for Combus-
tion and Ventilation, pages 5 through 7.
7. Before usingfurniturepolish, wax,car-
pet cleaner, or similar products, turn
heater off. If heated, the vapors from
theseproducts maycreate awhite pow-
der residue within burner box or on
adjacent walls or furniture.
8. If heater shuts off, do not relight until
you provide fresh, outside air. If heater
keeps shutting off, have it serviced.
9. Do not run heater
• where flammable liquids or vapors
are used or stored.
• under dusty conditions.
10. Never place any objects on the heater.
11. Surface of heater becomes very hot
whenrunning heater.Keepchildrenand
adults away from hot surface to avoid
burns or clothing ignition. Heater will
remain hot for a time after shutdown.
Allow surface to cool before touching.
12. Carefully supervise young children
whentheyarein same roomwithheater.
13. Make surescreen is inplace before run-
ning heater.
14. To prevent the creation of soot, follow
the instructions in Cleaning and Main-
tenance, page 19.
15. 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.
16. Turn off and unplug heater and let cool
beforeservicing.Only aqualifiedservice
person should service and repair heater.
17. Operating heater above elevations of
4,500 feet could cause pilot outage.
18. To prevent performance problems, do
not use a propane/LP fuel tank of less
than 100 lbs. capacity.
DANGER: Carbon monoxide
poisoning may lead to death!
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, electrical
shock, and carbon monoxide
poisoning.
WARNINGS
WARNING: Any change to
this heater or its controls can be
dangerous.
WARNING: Do not use a
blower insert, heat exchanger
insert, or other accessory not
approvedforusewiththisheater.

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106056
OWNER’S MANUAL
PRODUCT
IDENTIFICATION
Figure 1 - Vent-Free Gas Log Propane/LP Gas Space Heater
UNPACKING
1. Remove heater from carton.
2. Remove all protective packaging ap-
plied to heater for shipment.
3. Make sure your heater includes two
hardware packets.
4. Check heater for any shipping damage.
If heater is damaged, promptly inform
dealer where you bought heater.
ASSEMBLY
ASSEMBLING HEATER
Tools Required:
• Phillips screwdriver
• 5/16" hex wrench
• slotted screwdriver
Removing Front Panel Of Heater
1. Remove two screws near bottom cor-
ners of front panel with Phillips screw-
driver.
2. Pull bottom offront panel forward,then
down (see Figure 2) .
Figure2-RemovingFrontPanelofHeater
Piezo Ignitor
Figure3-AttachingIgnitorCabletoPiezo
Ignitor
Ignitor
Cable
Continued
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Ignitor Button
Screen
Front
Panel
Heater
Cabinet
Log
Lighting and
Warning Plates
Control Knob
Installing Log
Note: For easier installation, lay heater on
its back.
1. Remove log from inside top of heater.
Discard protective packaging.
2. Attach ignitor cable to piezo ignitor
(see Figure 3).
3. With Phillips screwdriver, remove four
screws holding screen in place. Re-
move screen.
4. Gently slide log between log retaining
brackets on deflector assembly (see
Figure 4, page 4). The log should fit
firmly against bottom of log retaining
brackets.
5. Reattach screen using four screws re-
moved in step 3.
Note: Do not remove
Lighting and Warning
Plates from heater

4
106056-01
GAS RESIDENTIAL HEATERS
®
Attaching Brass Front Trim to
Front Panel
1. Locate brass front trim in brass trim
package.
2. Slide the head of two truss-head screws
from hardware packet into each end of
brass front trim (see Figure 5).
3. Line up screwswith holes infront panel
(see Figure 4). Insert screws in holes.
Attach nuts from inside of front panel.
Tighten with wrench.
5. Slide other end of adjusting plate/shim
in slot on mitered edge of side brass
trim (see Figure 6).
6. While firmly holding edges of brass
trim together, tighten both set screws
on the adjusting plate with slotted
screwdriver.
7. Repeat steps 1 through 6 for other side.
8. Place the assembled trim on front of
heater cabinet.Attach on top and sides
withfour brass screwsincludedin hard-
ware package (see Figure 7).
9. Reattach front panel to heaterif youare
going to mount the heater to the base.
Do not reattach front panel at this time
ifyou are goingto mount heaterto wall.
Log
Retaining
Brackets
Figure 4 - Assembling Heater
Truss-Head
Screw Nut
Front Panel
Figure 5 - Attaching Brass Front Trim to
Front Panel
Brass Front Trim
Top Brass
Trim
Slot
Mitered Edge
Slot
Set
Screws
Adjusting
Plate
Screws
Assembled
Brass Trim
Shim
Figure 6 - Assembling Brass Trim
Figure7 -Attaching Brass Trim to Heater
WARNING: Always have
burnershieldandscreeninplace
beforeoperatingheater.Thispre-
ventsexcessivetemperatureson
heater surfaces.
Failure to position the parts in
accordance with these diagrams
or failure to use only parts spe-
cificallyapprovedwiththisheater
mayresultinpropertydamageor
personal injury.
Side Brass
Trim
ASSEMBLY
Continued
Burner Shield
Screen
Front Panel
Deflector
Log
Truss-
Head
Screw
Brass Front Trim Screw
Screw
Heater Cabinet
Nut
Assembling and Attaching
Brass Trim
1. Remove packaging from three remain-
ing pieces of brass trim.
2. Locate four brass screws, two adjust-
ing plates with set screws, and two
shims in the hardware packet.
3. Align shim under adjusting plate as
shown in Figure 6.
4. Slide one end of adjusting plate/shim
inslot onmitered edge of top brasstrim
(see Figure 6).

5
106056
OWNER’S MANUAL
AIR FOR
COMBUSTION AND
VENTILATION
Today’s homes are built more energy effi-
cient than ever. New materials, increased
insulation, and new construction methods
helpreduceheatlossinhomes.Homeowners
weatherstripandcaulkaroundwindowsand
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.
Confined and Unconfined Space
The National Fuel Gas Code (ANS Z223.1,
1992 Section 5.3) defines a confined space
as a space whose volume is less than 50
cubicfeetper1,000Btuperhour(4.8m3per
kw) of the aggregate 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 m3per kw) of the aggregate
inputratingofallappliancesinstalledinthat
space.Roomscommunicatingdirectly with
the space in which the appliances are in-
stalled*, through openings not furnished
with doors, are considered 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.
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.
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 5 through 7 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 (6x10-11 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 additional fresh
air. See Ventilation Air From Outdoors,
page 7.
If your home does not meet all of the three
criteriaabove,proceedtoDeterminingFresh-
Air Flow For Heater Location, page 6.
Continued

6
106056-01
GAS RESIDENTIAL HEATERS
®
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 ___________________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: 51,200 Btu/Hr (maximum the space can support)
60,000 Btu/Hr (actual amount of Btu/Hr used)
ThespaceintheaboveexampleisaconfinedspacebecausetheactualBtu/HrusedismorethanthemaximumBtu/Hrthespacecansupport.
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 7.
B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 7.
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.
AIR FOR
COMBUSTION AND
VENTILATION
Continued
Example:
Gas water heater 30,000 Btu/Hr
Vent-free heater + 30,000 Btu/Hr
Total = 60,000 Btu/Hr
WARNING:Iftheareainwhichtheheatermaybeoperatedissmallerthanthatdefinedasanunconfinedspace
or if 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, 1992, Section 5.3 or applicable local codes.

7
106056
OWNER’S MANUAL
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,Figure8).Youcanalso
remove door into adjoining room (see op-
tion 3, Figure 8). 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.
Figure 8 - Ventilation Air from Inside Building
Figure 9 - Ventilation Air from Outdoors
Or
Remove
Door into
Adjoining
Room,
Option 3
Ventilation Grills
Into Adjoining Room,
Option 2
12"
12"
Ventilation
Grills
into Adjoining
Room,
Option 1
Outlet
Air Ventilated
Attic
Outlet
Air
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic
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.
AIR FOR
COMBUSTION AND
VENTILATION
Continued
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,Section5.3,AirforCombustionand
Ventilation for required size of ventilation
grills or ducts.
IMPORTANT: Do not provideopeningsfor
inlet or outlet air into attic if attic has a
thermostat-controlledpowervent.Heatedair
enteringtheatticwillactivatethepowervent.

8
106056-01
GAS RESIDENTIAL HEATERS
®
WARNING: Never install the
heater
• in a bedroom or a 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
IMPORTANT: Vent-free heaters add mois-
ture to the air. Although this is beneficial,
installing heater in rooms without enough
ventilationairmaycausemildewtoformfrom
too much moisture. See Fresh Air for Com-
bustion and Ventilation, pages 5 through 7.
36"
5"
FLOOR
CEILING
Minimum
Minimum To Top Surface
Of Carpeting, Tile Or Other
Combustible Material
6"
Minimum
From
Sides Of
Heater
Left
Side Right Side
INSTALLATION
CHECK GAS TYPE
Useonlypropane/LPgas.Ifyourgassupplyis
not propane/LP, do not install heater. Call
dealer where you bought heater for proper
type heater.
INSTALLATION ITEMS
Beforeinstallingheater,makesureyouhave
the items listed below.
• external regulator (supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• manual shutoff valve *
• ground joint union
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
* AnA.G.A.design-certifiedmanualshutoff
valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Pur-
chase the optional A.G.A. design-certified
manual shutoff valve from your dealer. See
Accessories, page 23.
WARNING: A qualified ser-
vice person must install heater.
Follow all local codes.
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 acentral
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.
CAUTION:Thisheatercreates
warmaircurrents.Thesecurrents
moveheattowallsurfacesnextto
heater. Installing heater next to
vinyl or cloth wall coverings or
operatingheaterwhereimpurities
(suchastobaccosmoke,aromatic
candles, cleaning fluids, oil or
kerosene lamps, etc.) in the air
exist, may discolor walls.
LOCATING HEATER
You can locate heater on floor. The op-
tional hearth base is needed. You can also
install optional decorative mantels on the
heater (some mantels require the hearth
base). IMPORTANT: Only use optional
mantels and hearth base specified in this
manual. Purchase the optional mantel and
hearthbasefromyourdealer. SeeAccesso-
ries, page 23.
The heater may also be mounted on a wall.
Youcannotuseoptionalmantelifmounting
heater on a wall.
WARNING:Maintainthemini-
mumclearancesshowninFigure
10. If you can, provide greater
clearancesfromfloor,ceiling,and
joining wall.
Figure 10 - Mounting Clearances As Viewed From Front of Heater
Forconvenienceandefficiency,installheater
• where there is easy access for operation,
inspection, and service.
• in coldest part of room.
An optional fan kit is available from your
dealer. See Accessories, page 23. If plan-
ningtouse fan,locateheaternearanelectri-
cal outlet.
CAUTION: If you install the
heater in a home garage
• heaterpilotandburnermustbe
at least 18 inches above floor.
• locateheaterwheremovingve-
hicle will not hit it.

9
106056
OWNER’S MANUAL
Thermostat
Sensing Bulb
Clamp
THERMOSTAT SENSING
BULB
The thermostat sensing bulb has been placed
insidetheheaterforprotectionduringshipping.
Locating Thermostat Sensing
Bulb
1. Remove front panel of heater (see Fig-
ure 2, page 3).
2. Locate thermostat sensing bulb just
under burner assembly.
IMPORTANT: Attach thermostat sensing
bulb to back of heater for proper operation.
Attaching Thermostat Sensing
Bulb
1. Remove thermostat sensing bulb from
holders inside heater. Route through
slot opening in bottom of heater.
2. Place clamp onthermostat sensing bulb
as shown in Figure 11. Clamp is pro-
vided in hardware package.
3. Snap clamp into upper mounting hole
as shown in Figure 11. Mounting hole
is located on lower left edge on back
of heater. Make sure the thermostat
sensing bulb is pointing up.
Figure11-AttachingThermostatSensing
Bulb
Mounting
Bracket
INSTALLATION OPTIONS
There are three options for mounting this
heater.
A. Mounting heater to wall
B. Mounting heater tooptional hearth base
C. Mounting heater to optional mantel
(some mantels require the hearth base)
A. MOUNTING HEATER TO
WALL
Mounting Bracket
The mounting bracket is located on back
panel of heater. It has been taped there for
shipping. Remove mounting bracket from
back panel.
Figure 12 - Mounting Bracket Location
Methods For Attaching Mount-
ing Bracket To Wall
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.
1. Attaching to wall stud
2. Attaching to wall anchor
Attaching To Wall Stud: This method
providesthestrongesthold.Insertmounting
screws through mounting bracket and into
wall studs.
AttachingToWallAnchor: Thismethod
allows you to attach mounting bracket to
hollow walls (wall areas between studs) or
to solid walls (concrete or masonry).
Decidewhichmethodbettersuitsyourneeds.
Eithermethodwillprovideasecureholdfor
the mounting bracket.
Marking Screw Locations
1. Tape mounting bracket to wall where
heater will be located. Make sure
mounting bracket is level.
Figure13-Mounting Bracket Clearances
Attaching Mounting Bracket To
Wall
Note: Wall anchors, mounting screws, and
spacers are in hardware package. The hard-
ware package is provided with heater.
Attaching To Wall Stud Method
Forattachingmountingbrackettowallstuds
1. Drill holes at marked locations using
9/64" drill bit.
2. Place mounting bracket onto wall.Line
uplast holeon eachend of bracket with
holes drilled in wall.
3. Insert mounting screwsthrough bracket
and into wall studs.
4. Tighten screws until mounting bracket
is firmly fastened to wall studs.
Continued
20 3/4"
Min.
11"
Min. 16"
Adjoining Wall
Only Insert Mounting
Screws Through Last
Hole On Each End
Floor
INSTALLATION
Continued
WARNING:Maintainminimum
clearancesshownin Figure 13.If
you can, provide greater clear-
ancesfromfloorandjoiningwall.
2. Mark screw locations on wall (see Fig-
ure 13).
Note: Only mark last hole on each end
of mounting bracket. Insert mounting
screws through these holes only.
3. Remove tape and mounting bracket
from wall.

10
106056-01
GAS RESIDENTIAL HEATERS
®
Attaching To Wall Anchor Method
For attaching mounting bracket to hollow
walls (wall areas between studs) or solid
walls (concrete or masonry)
1. Drill holes at marked locations using
5/16"drill bit.For solidwalls (concrete
or masonry), drill at least 1" deep.
2. Fold wall anchorasshown in Figure14.
3. Insert wall anchor (wings first) into
hole. Tap anchor flush to wall.
4. For thin walls (1/2" or less), insert red
key into wall anchor. Push red key to
“pop” open anchor wings.
IMPORTANT: Do not hammer key!
Forthick walls (over1/2"thick) or solid
walls, do not pop open wings.
5. Place mounting bracket onto wall.Line
uplast holeon eachend of bracket with
wall anchors.
6. Insert mounting screwsthrough bracket
and into wall anchors.
7. Tighten screws until mounting bracket
is firmly fastened to wall.
INSTALLATION
Continued
Figure16 - MountingHeater Onto Mount-
ing Bracket
Installing Bottom Mounting
Screws
1. Locate two bottom mounting holes.
These holes are near bottom on back
panel of heater (see Figure 17).
2. Mark screw locations on wall.
3. Remove heater frommounting bracket.
4. If installing bottom mounting screws
into hollow or solid wall, install wall
anchors. Follow steps 1 through 4 un-
der Attaching To Wall Anchor Method.
If installing bottom mounting screw
into wall stud, drill holes at marked lo-
cations using 9/64" drill bit.
5. Replace heater onto mounting bracket.
6. Place spacers between bottom mount-
ingholesandwallanchorordrilled hole.
7. Hold spacer in place with one hand.
With otherhand, insertmounting screw
through bottom mounting hole and
spacer. Place tip of screw in opening
of wall anchor or drilled hole.
8. Tightenbothscrewsuntil heater is firmly
secured 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 12 and 13).
Figure 17 - Installing Bottom Mounting
Screws
B. MOUNTING HEATER ON
OPTIONAL HEARTH BASE
Tools needed:
• #2 Phillips screwdriver
• slotted screwdriver
• electric drill (if securing base to floor)
The optional hearth base kit includes the
following:
• Hearth Base
• 4 Wood Screws
• 4 Sheet Metal Screws
• Brass Base Trim
• Hearth Insert
• 4 Anchors
• 2 Brass Screws
Note: It is an option to secure “A” model
hearth base to floor. You must secure the
“B” and “C” model hearth base to floor. To
secure hearth base to floor, follow instruc-
tions under Securing Hearth Base to Floor,
page11.Ifnotsecuringhearthbasetofloor,
proceed to Mounting Heater to Optional
Hearth Base, page 11.
Figure 14 - Folding Anchor
Figure 15 - Popping Open Anchor Wings
For Thin Walls
Placing Heater On Mounting
Bracket
1. Locate two horizontal slots on back
panel of heater.
2. Place heater onto mounting bracket.
Slide horizontal slots onto stand-out
tabs on mounting bracket.
Horizontal Slots
Mounting Bracket
(attached to wall)
Stand-Out
Tab

11
106056
OWNER’S MANUAL
INSTALLATION
Continued
Mounting Heater to Optional
Hearth Base
1. Lay heater on its back on a table with
the bottom of heater overhanging the
edge of the table.
2. Remove 2 shipping screws in bottom
of heater. Discard shipping screws.
3. Line up mountingholeson top ofhearth
basewith holesin bottomof heater (see
Figure 18).
4. Using a Phillips screwdriver, secure
hearth base to heater with four sheet
metal screws (see Figure 18).
5. Stand heater up on base.
6. Place hearth insert in hearth base as
shown in Figure 19.
7. Assemble brass trim (see steps 1
through 7 under Assembling and At-
taching Brass Trim, page 4).
8. Slide base trim on heater base. Attach
brasstrim to basewith two brassscrews
included as shown in Figure 19.
Figure 18 - Attaching Heater to Hearth
Base
Base
Holes for Securing
Heater to Floor
Shipping Screw Bottom of Heater
Sheet Metal
Screw
Mounting
Holes Brass Base
Trim
Hearth
Insert
Screw
Figure19-PlacingHearthInsertonHeater
Base and Attaching Brass Base Trim
Securing Hearth Base to Floor
1. Position hearth basein desired location.
Markholes fordrilling (See Figure 18).
Remove hearth base.
2. For carpeted floor, make a small cut
with a sharp knife at marked locations
before drilling.
If securing to a wood floor, drill a 3/4"
deep hole using a 1/8" diameter drill bit.
Do not use anchors in wood floors. If
securing to a concrete floor, drill a 1 3/8"
deep hole using a 1/4" diameter concrete
drill bit. Completely insert anchors into
each hole.
3. Mount heater to hearth base following
steps under Mounting Heater to Op-
tional Hearth Base. After mounting
heater, position heater and hearth base
over drilled holes. With slotted screw-
driver, secure hearth base to floor with
four wood screws.
C. MOUNTING HEATER TO
OPTIONAL MANTEL
See Instructions Included
With Mantel Kit.
IMPORTANT: Only use the optional man-
tels specified in this manual. See Accesso-
ries, page 23 for proper mantel kits. This
heateris onlyapproved for use with models
GMF800/GMU801 series, GM900F/
GM901Useries,GM902F/GM903Useries,
GM700F/GM701U, and GM702F/
GM703Useriesmantelkits.Usinganyother
mantel will void the A.G.A. approval for
this heater. Only use models GMF800/
GMU801series,GM900F/GM901Useries,
GM902F/GM903U series, GM700F/
GM701U, and GM702F/GM703U series
mantels with this heater. Do not use these
mantels with any other product.
Continued

12
106056-01
GAS RESIDENTIAL HEATERS
®
Installation must include a manual 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 21). An appliance main
gas valve (manual shutoff valve) must be
locatedwithineasyreachforturningthegas
supply on and off.
Tee Joint
Reducer
Bushing to
1/8" NPT
1/8" NPT
Plug Tap
Test Gauge
Connection *
Tee Joint
Pipe Nipple
Cap
Sediment Trap
Figure 21 - Gas Connection
* An A.G.A. design-certified manual shutoff valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Purchase the optional A.G.A. design-certified manual
shutoff valve from your dealer. See Accessories, page 23.
Pressure
Regulator
3/8" NPT
Pipe Nipple
Ground
Union Joint Heater
Cabinet
3" Minimum
Note: Burner bracket
not shown for clarity
Manual Shutoff
Valve *
CONNECTING TO GAS
SUPPLY
Figure 20 - External Regulator with Vent
Pointing Down
CAUTION:Usepipejointseal-
ant that is resistant to liquid pe-
troleum (LP) gas.
Propane/LP
Supply Tank
Vent
Pointing
Down
External
Regulator
From External
Regulator (11" W.C.
to 14" W.C. Pressure)
CAUTION: A qualified service
person must connect heater to
gassupply.Followalllocalcodes.
Never connect heater directly to
the propane/LP supply. This
heater requires an external regu-
lator (not supplied). Install the
external regulator between the
heater and propane/LP supply.
The installer must supply an external regu-
lator. The external regulator will reduce
incoming gas pressure. You must reduce
incominggaspressuretobetween11and14
inchesofwater.Ifyoudonotreduceincom-
ing gas pressure, heater regulator damage
could occur. Install external regulator with
the vent pointing down as shown in Figure
20. Pointing the vent down protects it from
freezing rain or sleet.
WARNING:A qualifiedservice
personmustconnectheatertogas
supply. Follow all local codes.
INSTALLATION
Continued
CAUTION: Use only new,
black iron or steel pipe. Inter-
nally-tinned copper tubing may
be used in certain areas. Check
yourlocalcodes.Usepipeof1/2"
or greater diameter to allow
proper gas volume to heater. If
pipe is too small, undue loss of
pressure will occur.
Apply pipe joint sealant lightly to male
threads. This will prevent excess sealant
fromgoing into pipe.Excess sealant inpipe
could result in clogged heater valves.
Installsedimenttrapinsupplylineasshown
in Figure 21. Locate sediment trap where it
is within reach for cleaning. Locate sedi-
menttrap wheretrapped matter is not likely
to freeze. A sediment trap traps moisture
and contaminants. This keeps them from
going into heater controls. If sediment trap
is not installed or is installed wrong, heater
may not run properly.
IMPORTANT: Hold pressure regulator
with wrench when connecting it to gas pip-
ing and/or fittings.

13
106056
OWNER’S MANUAL
ON
POSITION
OFF
POSITION
CHECKING GAS
CONNECTIONS
Pressure Testing Gas Supply
Piping System
TestPressuresInExcessOf1/2PSIG
(3.5 kPa)
1. Disconnect heater and its individual
manual shutoff valve from gas supply
piping system. Pressures in excess of
1/2 psig will damage heater regulator.
2. Cap off open end of gas pipe where
manual shutoff valve was connected.
3. Pressurize supply piping system by ei-
ther using compressed air or opening
propane/LP supply tank valve.
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 fireplace and manualshutoff
valve to gas supply. Check reconnected
fittings for leaks.
TestPressuresEqualToorLessThan
1/2 PSIG (3.5 kPa)
1. Close manual shutoff valve (see Fig-
ure 22).
2. Pressurize supply piping system by ei-
ther using compressed air or opening
propane/LP supply tank valve.
3. Check all joints from propane/LP sup-
ply tank to manual shutoff valve (see
Figure 23). Apply mixture of liquid
soap and water to gas joints. Bubbles
forming show a leak.
4. Correct all leaks at once.
Open
Closed
Manual
Shutoff
Valve
Figure 23 - Checking Gas Joints
Manual
Shutoff
Valve
Propane/LP
Supply Tank
Thermostat Gas
Valve Location
Figure 22 - Manual Shutoff Valve
Pressure Testing Heater Gas
Connections
1. Open manual shutoff valve (see Fig-
ure 22).
2. Open propane/LP supply tank valve.
3. Make sure control knob of heater is in
the OFF position.
4. Check all joints from manual shutoff
valve to thermostat gas valve (see Fig-
ure 23). Apply mixture of liquid soap
and water to gas joints. Bubbles form-
ing show a leak.
5. Correct all leaks at once.
6. Light heater (see Operating Heater,
pages 14 and 15). Check all other in-
ternal joints for leaks.
7. Turn off heater (see To Turn Off Gas to
Appliance, page 14).
8. Replace front panel.
CAUTION: Make sure exter-
nal regulator has been installed
between propane/LP supply and
heater.Seeguidelinesunder Con-
necting to Gas Supply , page 12.
WARNING:Neveruseanopen
flame to check for a leak. Apply a
mixture of liquid soap and water
toalljoints.Bubblesformingshow
a leak. Correct all leaks at once.
WARNING: Test all gas pip-
ing and connections for leaks
after installing or servicing. Cor-
rect all leaks at once.
INSTALLATION
Continued

14
106056-01
GAS RESIDENTIAL HEATERS
®
PILOT
LO
OFF
HI
IGNITOR
OPERATING
HEATER
FOR YOUR SAFETY
READ BEFORE
LIGHTING
LIGHTING
INSTRUCTIONS
Figure 24 - Control Knob In The OFF
Position
Control Knob
Ignitor Button
1. STOP! Read the safety information,
column 1.
2. Make sure manual shutoff valve is
fully open.
3. Turn control knob clockwise
to the OFF position.
4. Wait five(5) minutesto clearout any
gas. Then smell for gas, including
near the floor. If you smell gas,
STOP! Follow “B” in the safety in-
formation. If you don’t smell gas, go
to the next step.
5. Turn control knob counterclockwise
C-clockwise
tothe PILOTposition. Press
in control knob for five (5) seconds
(see Figure 24).
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.
6. With control knob pressed in, push
down and release ignitor button.
This will light pilot. The pilot is at-
tached to the front of burner. If
needed, keep pressing ignitor but-
ton until pilot lights.
Note: If pilot does not stay lit, refer
to Troubleshooting, pages 16 through
18. Also contact a qualified service
person or gas supplier for repairs.
Untilrepairsaremade, lightpilot with
match. To light pilot with match, see
Manual Lighting Procedure, page 15.
CAUTION:Donottrytoadjust
heating levels by using the
manual shutoff valve.
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
1. Turncontrolknobclockwise
to the OFF position.
Note: Knobmustbedepressedslightly
2. Turn off all electric power to the ap-
pliance if service is to be performed.
Shutting Off Burner Only (pilot
stays lit)
Turn control knob clockwise to
the PILOT position.
Note: Knob must be depressed slightly.
A. Thisappliance hasapilotwhich must
belightedbyhand.Whenlightingthe
pilot,followtheseinstructionsexactly.
B. BEFORE LIGHTING smell all
aroundtheapplianceareaforgas.Be
sureto smellnext tothe floorbecause
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.
• Donottouchanyelectric switch;do
notuse anyphone inyourbuilding.
• Immediatelycallyourgas supplier
from a neighbor’s phone. Follow
the gas supplier’s instructions.
• If you cannot reach your gas sup-
plier, call the fire department.
C. Useonly yourhand topushin orturn
thegas controlknob. Neveruse 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.
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.
7. Keep control knob pressed in for 30
seconds after lighting pilot.After 30
seconds, release control knob.
• If control knob does not pop up
when released, contact a quali-
fied service person or gas sup-
plier for repairs.
Note: If pilot goesout, repeatsteps
3through7.Thisheaterhas asafety
interlock system. Wait one (1)
minute before lighting pilot again.
8. Push knob in slightly and turn con-
trol knob counterclockwise
C-clockwise
to desired heating level. The main
burner shouldlight. Setcontrolknob
toany heatlevelbetweenHI andLO.
Pilot Burner
Thermocouple
Figure 25 - Pilot
Ignitor Electrode

15
106056
OWNER’S MANUAL
OPERATING
HEATER
Continued
THERMOSTAT
CONTROL
OPERATION
The thermostatic control used on this
heaterdiffersfromstandardthermostats.
Standardthermostats simplyturn on and
off the burner. The thermostat used on
this heater senses the room temperature.
The thermostat adjusts the amount of gas
flow to the burner. This increases or de-
creases the burner flame height. At times
theroommayexceedthesettemperature.
If so, the burner will shut off. The burner
willcyclebackonwhenroomtemperature
drops below the set temperature.
The control knob can be set to any heat
level between HI and LO.
Note: The thermostat sensing bulb mea-
sures the temperature of air near the
heatercabinet.Thismaynotalwaysagree
with room temperature (depending on
housing construction, installation loca-
tion, room size, open air temperatures,
etc.). Frequent use of your heater will let
you determine your own comfort levels.
MANUAL LIGHTING
PROCEDURE
1. Remove front panel (see Figure 2,
page 3).
2. Followsteps 1through5underLight-
ing Instructions, page 14.
3. With control knob pressed in, strike
match. Hold match to pilot until pi-
lot lights.
4. Keep control knob pressed in for 30
seconds after lighting pilot.After 30
seconds, release control knob. Now
follow step 8 under Lighting Instruc-
tions, page 14.
5. Replace front panel.
Figure 26 - Correct Pilot Flame Pattern
Thermocouple
Thermocouple
INSPECTING
BURNER
Figure 27 - Incorrect Pilot Flame Pattern
Pilot Burner
Pilot Burner
Check pilot flame pattern and burner flame
pattern often.
PILOT FLAME PATTERN
Figure26showsacorrectpilotflamepattern.
Figure 27 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 27
• turn heater off (see To Turn Off Gas to
Appliance, page 14)
• seeTroubleshooting,pages 16 through18
BURNER FLAME PATTERN
Figure 28 shows a correct burner flame
pattern.Figure29showsanincorrectburner
flame pattern. The incorrect burner flame
patternshowsyellowtippingoftheflame.It
also shows the flame higher than one inch
above the log.
Note: When using the heater the first time,
the flame will be yellow for approximately
one hour until the log cures.
NOTICE: Do not mistake orange
flames with yellow tipping. Dirt
or other fine particles enter the
heater and burn causing brief
patches of orange flame.
WARNING: If yellow tipping
occurs, your heater could pro-
duce increased levels of carbon
monoxide. If burner flame pat-
ternshowsyellowtipping,follow
instructions,bottomofthispage.
Yellow Tipping
Top of Flame About
One Inch Above Logs
Ifburnerflamepatternisincorrect,asshown
in Figure 29
• turn heater off (see To Turn Off Gas to
Appliance, page 14)
• seeTroubleshooting,pages16 through 18
Figure29-IncorrectBurnerFlamePattern
Figure 28 - Correct Burner Flame Pattern

16
106056-01
GAS RESIDENTIAL HEATERS
®
TROUBLESHOOTING WARNING: Turn off and un-
plug heater and let cool before
servicing. Only a qualified ser-
vice person should service and
repair heater.
REMEDY
1. Replace ignitor
2. Replace ignitor
3. Reconnect ignitor cable
4. Free ignitor cable if pinched by any
metal or tubing. Keep ignitor cable dry
5. Tighten nut holding piezo ignitor to
heater cabinet. Nut is located inside
heater cabinet at top
6. Replace ignitor cable
7. Replace piezo ignitor
1. Turn on gas supply or open manual
shutoff valve
2. Turn control knob to PILOT position
3. Press in control knob while in PILOT
position
4. Continue holdingdowncontrol knob. Re-
peatignitingoperation untilairisremoved
5. Contact local propane/LP gas company
6. Clean ODS/pilot (see Cleaning and
Maintenance, page 19) or replace ODS/
pilot assembly
7. Replace gas regulator
1. Press in control knob fully
2. After ODS/pilot lights, keep control
knob pressed in 30 seconds
3. Wait one minute for safety interlock sys-
tem to reset. Repeat ignition operation
4. Fully open manual shutoff valve
5. Hand tighten until snug, then tighten
1/4 turn more
6. A) Contact local propane/LP company
B) Clean ODS/pilot (see Cleaning and
Maintenance, page 19) or replace ODS/
pilot assembly
7. Replace thermocouple
8. Replace control valve
POSSIBLE CAUSE
1. Ignitor electrode positioned wrong
2. Ignitor electrode broken
3. Ignitor electrode not connected to igni-
tor cable
4. Ignitor cable pinched or wet
5. Piezo ignitor nut is loose
6. Broken ignitor cable
7. Bad piezo ignitor
1. Gas supply turned off or manual 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. Depleted gas supply
6. ODS/pilot is clogged
7. Gas regulator setting is not correct
1. Control knob not fully pressed in
2. Control knob notpressed inlong enough
3. Safety interlock system has been trig-
gered
4. Manual shutoff valve not fully open
5. Thermocouple connection loose at con-
trol valve
6. 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
7. Thermocouple damaged
8. Control valve damaged
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’s Technical Service web
site at www.desatech.com.
Note: Alltroubleshootingitemsarelistedin
order of operation.
www.desatech.com

17
106056
OWNER’S MANUAL
REMEDY
1. Clean burner (see Cleaning and Mainte-
nance, page 19) or replace burner orifice
2. Replace burner orifice
3. Contact local propane/LP company
1. Contact local propane/LP company
2. Clean burner (see Cleaning and Mainte-
nance, page 19) or replace burner orifice
1. Clean burner (see Cleaning and Mainte-
nance, page 19) or replace burner orifice
2. Replace burner
3. Replace gas regulator
1. Check burner for dirt and debris. If
found, clean burner (see Cleaning and
Maintenance, page 19)
2. Replace gas regulator
1. Problem will stop after a few hours of
operation
1. Turn control knob to LO position and
let warm up for a minute
2. Operateburner untilair isremoved from
line.Have gasline checkedby local pro-
pane/LP company
3. Observe minimum installation clear-
ances (see Figure 10, page 8)
4. Clean burner (see Cleaning and Mainte-
nance, page 19) or replace burner orifice
1. Turn heater off when using furniture
polish, wax, carpet cleaners, or similar
products
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
Burner does not light after ODS/pilot is lit
Delayed ignition of burner
Burner backfiring during combustion
Yellow flame during burner combustion
Slightsmokeor odor during initialoperation
Heater produces a whistling noise when
burner is lit
Whitepowderresidueformingwithinburner
box or on adjacent walls or furniture
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. Burner damaged
3. Gas regulator defective
1. Not enough air
2. Gas regulator defective
1. Residues from manufacturing processes
1. Turning control knob to HI position
when burner is cold
2. Air in gas line
3. Air passageways on heater blocked
4. Dirty or partially clogged burner orifice
1. When heated, vapors from furniturepol-
ish, wax, carpet cleaners, etc. turn into
white powder residue
Continued
www.desatech.com

18
106056-01
GAS RESIDENTIAL HEATERS
®
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
Heater produces a clicking/ticking noise
just after burner is lit or shut off
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
POSSIBLE CAUSE
1. Metal expanding while heating or con-
tracting while cooling
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
REMEDY
1. This is common with most heaters. If
noiseis excessive,contact qualifiedser-
vice person
1. Ventilate room. Stop using odor caus-
ing products while heater is running
2. Locate and correctall leaks(see Check-
ing Gas Connections, page 13)
1. Openwindowand/ordoor for ventilation
2. Contact local propane/LP company
3. Clean ODS/pilot (see Cleaning and
Maintenance, page 19)
1. Locate and correctall leaks(see Check-
ing Gas Connections, page 13)
2. Replace control valve
1. Take apart gas tubing and remove for-
eign matter
2. Locate and correctall leaks(see Check-
ing Gas Connections, page 13)
www.desatech.com

19
106056
OWNER’S MANUAL
CLEANING AND
MAINTENANCE
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.
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,
pet hair, etc.
WARNING: Turn off heater
and let cool before cleaning.
CLEANING BURNER
INJECTOR HOLDER AND
PILOT AIR INLET HOLE
The primary air inlet holes allow the proper
amount of air to mix with the gas. This
provides a clean burning flame. Keep these
holesclearofdust,dirt,andlint.Cleanthese
air inlet holes prior to each heating season.
Blocked air holes will create soot. We rec-
ommendthatyoucleantheunitevery 2,500
hours of operation or every three months.
Wealsorecommendthatyoukeeptheburner
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-
tionsonthecan, youcoulddamagethepilot
assembly.
1. Shut off the unit, including the pilot.
Allow the unit to cool for at least thirty
minutes.
2. Inspect burner, pilot, and primary air
inlet holes on injector holder for dust
and dirt.
3. Blow air through the ports/slots and
holes in the burner.
4. Check the injector holder located at the
end of the burner tube again. Remove
any large particles of dust, dirt, lint, or
pet hairs with a soft cloth or vacuum
cleaner nozzle.
5. In case any large clumps of dust have
now been pushed into the burner repeat
steps 3 and 4.
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 30). With the unit off, lightly
blowair through theairinlet hole. Youmay
blowthroughadrinkingstrawifcompressed
air is not available.
Figure 30 - Pilot Inlet Air Hole
Pilot Assembly
Pilot Air Inlet
Hole
REPLACEMENT
PARTS
Note: Use only original replacement parts.
Thiswillprotectyourwarrantycoveragefor
parts replaced under warranty.
PARTS UNDER WARRANTY
Contact authorized dealers of this product.
If they can’t supply original replacement
part(s), call DESA International’s Techni-
cal Service Department at 1-800-323-5190
for referral information.
When calling DESA International, 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
Contactauthorizeddealersofthis product. If
theycan’tsupplyoriginalreplacementpart(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

20
106056-01
GAS RESIDENTIAL HEATERS
®
12-1
12-2
1
2
9
10
10
11
12 13
14
15
17
19
20
23
24
25
8
6
6
21
7
1
3
5
18 16
4
22
26
1
ILLUSTRATED
PARTS
BREAKDOWN
VMH3000TPS