VENT-FREE NATURAL GAS MINI-HEARTH HEATER Logs/model_AVMH3000TNAR_manu… · VENT-FREE NATURAL GAS...

Save this manual for future reference.

OWNER’S OPERATION AND INSTALLATION MANUAL

VENT-FREE NATURAL GASMINI-HEARTH® HEATER

VMH3000TNA

15,000 to 30,000 Btu/Hrwith Thermostat

WARNING: If the information in this manual is notfollowed exactly, a fire or explosion may resultcausing property damage, personal injury, orloss of life.— Do not store or use gasoline or other

flammable vapors and liquids in the vicinityof 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’sinstructions.

• If you cannot reach your gas supplier, callthe fire department.

— Installation and service must be performedby a qualified installer, service agency, or thegas supplier.

WARNING: Improper installa-tion, adjustment, alteration,service, or maintenance cancause injury or property dam-age. Refer to this manual forcorrect installation and op-erational procedures. For as-sistance or additional infor-mation consult a qualified in-staller, service agency, or thegas supplier.

WARNING: This is an unventedgas-fired heater. It uses air(oxygen) from the room inwhich it is installed. Provisionsfor adequate combustion andventilation air must be pro-vided. Refer to Air For Com-bustion and Ventilation sec-tion on page 5 of this manual.

®

Shown with OptionalMantel Which Features

a Built-In Base

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 applianceis not convertible for use with other gases.*Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer

2 107097

NATURAL GAS RESIDENTIAL HEATERS®

For more information, visit www.desatech.com

LOCAL CODESInstall and use heater with care. Follow alllocal codes. In the absence of local codes, usethe latest edition of The National Fuel GasCode, 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 ParkQuincy, MA 02269

SAFETYINFORMATION

WARNINGSIMPORTANT: Read this owner’smanual carefully and completelybefore trying to assemble, oper-ate, or service this heater. Im-proper use of this heater can causeserious injury or death from burns,fire, explosion, electrical shock,and carbon monoxide poisoning.

DANGER: Carbon monoxidepoisoning may lead to death!

WARNING: Any change tothis heater or its controls can bedangerous.

Carbon Monoxide Poisoning: Early signs ofcarbon monoxide poisoning resemble the flu,with headaches, dizziness, or nausea. If youhave these signs, the heater may not be work-ing properly. Get fresh air at once! Haveheater serviced. Some people are more af-fected by carbon monoxide than others. Theseinclude pregnant women, people with heart orlung disease or anemia, those under the influ-ence of alcohol, and those at high altitudes.

Natural Gas: Natural gas is odorless. Anodor-making agent is added to natural gas.The odor helps you detect a natural gas leak.However, the odor added to natural gas canfade. Natural gas may be present even thoughno odor exists.

Make certain you read and understand allwarnings. Keep this manual for reference. Itis your guide to safe and proper operation ofthis heater.

1. This appliance is only for use with thetype of gas indicated on the rating plate.This appliance is not convertible for usewith 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 thegas supplier’s instructions

• if you cannot reach your gas supplier,call the fire department

WARNING: Do not use ablower insert, heat exchangerinsert, or other accessory notapproved for use with this heater.

3. This heater shall not be installed in abedroom or bathroom.

4. This heater needs fresh, outside air ven-tilation to run properly. This heater hasan Oxygen Depletion Sensing (ODS)safety shutoff system. The ODS shutsdown the heater if not enough fresh airis available. See Air For Combustionand Ventilation, pages 5 through 7.

5. Before using furniture polish, wax, car-pet cleaner, or similar products, turnheater off. If heated, the vapors fromthese products may create a white pow-der residue within burner box or onadjacent walls or furniture.

6. If heater shuts off, do not relight untilyou provide fresh, outside air. If heaterkeeps shutting off, have it serviced.

7. Do not run heater• where flammable liquids or vapors

are used or stored.• under dusty conditions.

8. Do not use heater if any part has beenunder water. Immediately call a quali-fied service technician to inspect theroom heater and to replace any part ofthe control system and any gas controlwhich has been under water.

9. To prevent the creation of soot, followthe instructions in Cleaning and Main-tenance, page 19.

10. Turn off and unplug heater and let coolbefore servicing. Only a qualified serviceperson should service and repair heater.

11. Operating heater above elevations of4,500 feet could cause pilot outage.

WARNING: Do not allow fansto blow directly into the heater.Avoid any drafts that alter burnerflame patterns. Ceiling fans cancreate drafts that alter burnerflame patterns. Altered burnerpatterns can cause sooting.

Do not place clothing or otherflammable material on or nearthe appliance. Never place anyobjects on the heater.

Carefully supervise young chil-dren when they are in same roomwith heater.

Keep the appliance area clear andfree from combustible materials,gasoline, and other flammablevapors and liquids.

Due to high temperatures, theappliance should be located outof traffic and away from furnitureand draperies.

Surface of heater becomes veryhot when running heater. Keepchildren and adults away fromhot surfaces to avoid burns orclothing ignition. Fireplace willremain hot for a time after shut-down. Allow surfaces to cool be-fore touching.

Make sure screen is in place be-fore running heater.

3107097

OWNER’S MANUAL


PRODUCTFEATURESSAFETY DEVICEThis heater has a pilot with an OxygenDepletion Sensing (ODS) safety shutoffsystem. The ODS/pilot is a required featurefor vent-free room heaters. The ODS/pilotshuts off the heater if there is not enoughfresh air.

PIEZO IGNITION SYSTEMThis heater has a piezo ignitor. This systemrequires no matches, batteries, or othersources to light heater.

THERMOSTATIC HEATCONTROLThis heater has a thermostat sensing bulband a control valve. This results in the great-est heater comfort. This can also result inlower gas bills.

PRODUCTIDENTIFICATION

Figure 1 - Vent-Free Gas Log Propane/LP Gas Space Heater

1. Remove heater from carton.

2. Remove all protective packaging ap-plied to heater for shipment.

3. Make sure your heater includes twohardware packets.

4. Check heater for any shipping damage.If heater is damaged, promptly informdealer where you bought heater.

ASSEMBLYASSEMBLING HEATERTools Required:

• Phillips screwdriver• 5/16" hex wrench• slotted screwdriver

Removing Front Panel Of Heater1. Remove two screws near bottom cor-

ners of front panel with Phillips screw-driver.

2. Pull bottom of front panel forward, thendown (see Figure 2) .

Figure 2 - Removing Front Panel of Heater

Continued

ASDFKIG

LFJI alskdidkoemkgo dkirlnfgpd'fASD

FKIGLFJI alskdidkoem

kgo dkirlnfgpd'f

ASDFKIG



kgo dkirlnfgpd'f

ASDFKIG



kgo dkirlnfgpd'f

ASDFKIG



kgo dkirlnfgpd'f

ASDFKIG



kgo dkirlnfgpd'f

ASDFKIG



kgo dkirlnfgpd'f

ASDFKIG



kgo dkirlnfgpd'f

ASDFKIG



kgo dkirlnfgpd'f

ASDFKIG

LFJI alskdidkoemkgo dkirlnfgpd'ASD


kgo dkirlnfgpd'f

ASDFKIG



kgo dkirlnfgpd'f

ASDFKIG



kgo dkirlnfgpd'f

ASDFKIG



kgo dkirlnfgpd'f

SDFKIG



kgo dkirlnfgpd'f

ASDFKIG



kgo dkirlnfgpd'f

ASDFKIG

LFJI alskdidkoemkgo dkirlnfgpd'ASD


kgo dkirlnfgpd'f

ASDFKIG



kgo dkirlnfgpd'f

ASDFKIG



kgo dkirlnfgpd'f

ASDFKIG



kgo dkirlnfgpd'f

ASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'fASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'f








ASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'ASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'f




SDFKIGLFJI alskdidkoemkgo dkirlnfgpd'fASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'f


ASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'ASDFKIGLFJI alskdidkoemkgo dkirlnfgpd'f




Ignitor Button

Screen

FrontPanel

HeaterCabinet

Log

Lighting andWarning Plates

Control Knob

Installing Hood1. Remove hood from protective tray.

2. Locate 4 black sheet metal screws in-side hardware pack.

3. Place hood on deflector and line upholes (see Figure 3, page 4).

4. Secure hood to deflector with 4 blacksheet metal screws.

Note: Side of hood should be on the outsideflange of deflector.

Installing LogNote: For easier installation, lay heater onits back.1. With Phillips screwdriver, remove two

screws holding screen in place. Removescreen.

2. Remove log from inside of deflector.Discard protective packaging.

3. Gently slide log between log retainingbrackets on deflector assembly (see Fig-ure 3, page 4). The log should fit firmlyagainst bottom of log retaining brackets.

4. Reattach screen using two screws re-moved in step 1.

Note: Do not removeLighting and WarningPlates from heater

UNPACKING CAUTION: Do not remove the

metal data plates attached to theheater base assembly. The dataplates contain important warrantyinformation.

4 107097



Truss-HeadScrew

Nut

Front Panel

Figure 4 - Attaching Brass Front Trim toFront Panel

Brass FrontTrim

Figure 3 - Assembling Heater

Side BrassTrim

Top BrassTrim

Slot

Mitered EdgeSlot

SetScrews

AdjustingPlate

Screws

AssembledBrass Trim

Shim

Assembling and AttachingBrass Trim1. Remove packaging from remaining

three pieces of brass trim.

2. Locate four brass screws, two adjust-ing plates with set screws, and twoshims in the hardware packet.

3. Align shim under adjusting plate asshown in Figure 4.

4. Slide one end of adjusting plate/shimin slot on mitered edge of top brass trim(see Figure 5).

5. Slide other end of adjusting plate/shimin slot on mitered edge of side brasstrim (see Figure 5).

6. While firmly holding edges of brasstrim together, tighten both set screwson the adjusting plate with slottedscrewdriver.

7. Repeat steps 1 through 6 for other side.

8. Place the assembled trim on front ofheater cabinet. Attach on top and sideswith four brass screws included in hard-ware package (see Figure 6).

9. Reattach front panel to heater if you aregoing to mount the heater to the base.Do not reattach front panel at this timeif you are going to mount heater to wall.

Figure 5 - Assembling Brass Trim

Figure 6 - Attaching Brass Trim to Heater

Attaching Brass Front Trim toFront Panel1. Locate brass front trim in brass trim

package.

2. Slide the head of two truss-head screwsfrom hardware packet into each end ofbrass front trim (see Figure 4).

3. Line up screws with holes in front panel(see Figure 3). Insert screws in holes.Attach nuts from inside of front panel.Tighten with wrench.

ASSEMBLYContinued

WARNING: Always haveburner shield and screen in placebefore operating heater. This pre-vents excessive temperatures onheater surfaces.Failure to position the parts inaccordance with these diagramsor failure to use only parts spe-cifically approved with this heatermay result in property damage orpersonal injury.

LogRetainingBrackets

Burner Shield

Screen

Front Panel

DeflectorLog

Truss-HeadScrew

Brass Front Trim

Screw

Screw

HeaterCabinet

Nut

Hood

Sheet MetalScrew

5107097

OWNER’S MANUAL


Today’s homes are built more energy effi-cient than ever. New materials, increasedinsulation, and new construction methodshelp reduce heat loss in homes. Home ownersweather strip and caulk around windows anddoors to keep the cold air out and the warm airin. During heating months, home ownerswant their homes as airtight as possible.

While it is good to make your home energyefficient, your home needs to breathe. Freshair must enter your home. All fuel-burningappliances need fresh air for proper com-bustion and ventilation.

Exhaust fans, fireplaces, clothes dryers, andfuel burning appliances draw air from thehouse to operate. You must provide ad-equate fresh air for these appliances. Thiswill insure proper venting of vented fuel-burning appliances.

PROVIDING ADEQUATEVENTILATIONThe following are excerpts from NationalFuel Gas Code, NFPA 54/ANS Z223.1, Sec-tion 5.3, Air for Combustion and Ventilation.

All spaces in homes fall into one of the threefollowing ventilation classifications:

1. Unusually Tight Construction

2. Unconfined Space

3. Confined Space

The information on pages 5 through 7 willhelp you classify your space and provideadequate ventilation.

Unusually Tight Construction

The air that leaks around doors and win-dows may provide enough fresh air forcombustion and ventilation. However, inbuildings 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 witha rating of one perm (6x10 -11 kgper pa-sec-m 2) or less with open-ings gasketed or sealed and

b. weather stripping has beenadded on openable windows anddoors and

c. caulking or sealants are appliedto areas such as joints aroundwindow and door frames, be-tween sole plates and floors, be-tween wall-ceiling joints, be-tween wall panels, at penetra-tions for plumbing, electrical, andgas lines, and at other openings.

If your home meets all of the threecriteria above, you must provide ad-ditional fresh air. See Ventilation AirFrom Outdoors , page 7 .

If your home does not meet all of thethree criteria above, proceed to Deter-mining Fresh-Air Flow For Heater Lo-cation , page 6.

Confined and Unconfined Space

The National Fuel Gas Code, ANS Z223.1defines a confined space as a space whosevolume is less than 50 cubic feet per 1,000Btu per hour (4.8 m3 per kw) of the aggre-gate input rating of all appliances installedin that space and an unconfined space as aspace whose volume is not less than 50cubic feet per 1,000 Btu per hour (4.8 m3 perkw) of the aggregate input rating of allappliances installed in that space. Roomscommunicating directly with the space inwhich the appliances are installed*, throughopenings 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 constructionunless provisions are provided for adequatecombustion and ventilation air.

* Adjoining rooms are communicating onlyif there are doorless passageways or ventila-tion grills between them.

AIR FORCOMBUSTION ANDVENTILATION

WARNING: This heater shallnot be installed in a confined spaceor unusually tight constructionunless provisions are providedfor adequate combustion and ven-tilation air. Read the following in-structions to insure proper freshair for this and other fuel-burningappliances in your home.

Continued

6 107097



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: Includes the room in which you will install heater plus any adjoining rooms with doorless passageways or ventilation grills betweenthe 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 ofthe 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)

The space in the above example is a confined space because the actual Btu/Hr used is more than the maximum Btu/Hr the space can support.You must provide additional fresh air. Your options are as follows:

A. Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined space, remove door to adjoin-ing room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 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 noadditional fresh air ventilation.

AIR FORCOMBUSTION ANDVENTILATIONContinued

Example:Gas water heater 30,000 Btu/Hr

Vent-free heater + 30,000 Btu/Hr

Total = 60,000 Btu/Hr

WARNING: If the area in which the heater may be operated is smaller than that defined as an unconfined spaceor if the building is of unusually tight construction, provide adequate combustion and ventilation air by one ofthe methods described in the National Fuel Gas Code, ANS Z223.1, Section 5.3 or applicable local codes.

7107097

OWNER’S MANUAL


VENTILATION AIR

Ventilation Air From InsideBuilding

This fresh air would come from an adjoiningunconfined space. When ventilating to anadjoining unconfined space, you must pro-vide two permanent openings: one within12" of the ceiling and one within 12" of thefloor on the wall connecting the two spaces(see options 1 and 2, Figure 7). You can alsoremove door into adjoining room (see op-tion 3, Figure 7). Follow the National FuelGas Code, NFPA 54/ANS Z223.1, Section5.3, Air for Combustion and Ventilation forrequired size of ventilation grills or ducts.

Or Remove Door into Adjoining

Room, Option 3

Ventilation Grills Into Adjoining Room,

Option 2

12"

12"

VentilationGrills

into AdjoiningRoom,

Option 1

Figure 7 - Ventilation Air from Inside Building

OutletAir

VentilatedAttic

OutletAir

InletAir

Inlet Air Ventilated Crawl Space

To CrawlSpace

To Attic

Figure 8 - Ventilation Air from Outdoors

AIR FORCOMBUSTION ANDVENTILATIONContinued

WARNING: Rework work-sheet, adding the space of theadjoining unconfined space. Thecombined spaces must haveenough fresh air to supply allappliances in both spaces.

Ventilation Air From Outdoors

Provide extra fresh air by using ventilationgrills or ducts. You must provide two per-manent openings: one within 12" of theceiling and one within 12" of the floor.Connect these items directly to the outdoorsor spaces open to the outdoors. These spacesinclude attics and crawl spaces. Follow theNational Fuel Gas Code, NFPA 54/ANSZ223.1, Section 5.3, Air for Combustion andVentilation for required size of ventilationgrills or ducts.

IMPORTANT: Do not provide openings forinlet or outlet air into attic if attic has athermostat-controlled power vent. Heated airentering the attic will activate the power vent.

8 107097



3"

FLOOR

CEILING

36"Minimum6"

MinimumFromSides OfHeater

LeftSide

RightSide

Figure 9 - Mounting Clearances As ViewedFrom Front of Heater

CAUTION: If you install theheater in a home garage• heater pilot and burner must be

at least 18 inches above floor.• locate heater where moving ve-

hicle will not hit it.

WARNING: Never install theheater• in a bedroom or bathroom• in a recreational vehicle• where curtains, furniture,

clothing, or other flammableobjects are less than 42 inchesfrom the front, top, or sides ofthe heater

• as a fireplace insert• in high traffic areas• in windy or drafty areas

CAUTION: This heater cre-ates warm air currents. Thesecurrents move heat to wall sur-faces next to heater. Installingheater next to vinyl or cloth wallcoverings or operating heaterwhere impurities (such as to-bacco smoke, aromatic candles,cleaning fluids, oil or kerosenelamps, etc.) in the air exist, maydiscolor walls.

INSTALLATIONNOTICE: This heater is intendedfor use as supplemental heat. Usethis heater along with your pri-mary heating system. Do not in-stall this heater as your primaryheat source. If you have a centralheating system, you may runsystem’s circulating blower whileusing heater. This will help circu-late the heat throughout thehouse. In the event of a poweroutage, you can use this heateras your primary heat source.

CHECK GAS TYPEUse only natural gas. If your gas supply isnot natural gas, do not install heater. Calldealer where you bought heater for propertype heater.

INSTALLATION ITEMSBefore installing heater, make sure you havethe 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 design-certified equipment shutoffvalve with 1/8" NPT tap is an acceptablealternative to test gauge connection. Pur-chase the optional CSA design-certifiedequipment shutoff valve from your dealer.See Accessories, page 23.

WARNING: Maintain the mini-mum clearances shown in Figure9. If you can, provide greater clear-ances from floor, ceiling, and join-ing wall.

You can locate heater on floor. The op-tional hearth base is needed. You can alsoinstall optional decorative mantels on theheater (some mantels require the hearthbase). IMPORTANT: Only use optionalmantels and hearth base specified in thismanual. Purchase the optional mantel andhearth base from your dealer. See Accesso-ries, page 23.

The heater may also be mounted on a wall.You cannot use optional mantel if mountingheater on a wall.

LOCATING HEATER

WARNING: A qualified ser-vice person must install heater.Follow all local codes.

IMPORTANT: Vent-free heaters add mois-ture to the air. Although this is beneficial,installing heater in rooms without enoughventilation air may cause mildew to formfrom too much moisture. See Air for Com-bustion and Ventilation, pages 5 through 7.

For convenience and efficiency, install heater

• where there is easy access for operation,inspection, and service.

• in coldest part of room.

An optional fan kit is available from yourdealer. See Accessories, page 23. If plan-ning to use fan, locate heater near an electri-cal outlet.

Minimum toTop Surfaceof Carpeting,Tile, or OtherCombustibleMaterial

9107097

OWNER’S MANUAL


ThermostatSensing Bulb

Clamp

THERMOSTAT SENSINGBULBThe thermostat sensing bulb has been placedinside the heater for protection during shipping.

Locating Thermostat SensingBulb1. Remove front panel of heater (see Fig-

ure 2, page 3).

2. Locate thermostat sensing bulb justunder burner assembly.

IMPORTANT: Attach thermostat sensingbulb to back of heater for proper operation.

Attaching Thermostat SensingBulb1. Remove thermostat sensing bulb from

holders inside heater. Route throughslot opening in bottom of heater.

2. Place clamp on thermostat sensing bulbas shown in Figure 10. Clamp is pro-vided in hardware package.

3. Snap clamp into upper mounting holeas shown in Figure 10. Mounting holeis located on lower left edge on backof heater. Make sure the thermostatsensing bulb is pointing up.

Figure 10 - Attaching Thermostat Sens-ing Bulb

INSTALLATION OPTIONSThere are three options for mounting thisheater.

A. Mounting heater to wall

B. Mounting heater to optional hearth base

C. Mounting heater to optional mantel(some mantels require the hearth base)

A. MOUNTING HEATER TOWALL

Mounting Bracket

The mounting bracket is located in the pack-age tray. Remove mounting bracket fromtray.

Methods For AttachingMounting Bracket To Wall

Only use last hole on each end of mountingbracket to attach bracket to wall. These twoholes are 16 inches apart from their centers.Attach mounting bracket to wall in one oftwo ways.

1. Attaching to wall stud

2. Attaching to wall anchor

Attaching To Wall Stud: This method pro-vides the strongest hold. Insert mountingscrews through mounting bracket and intowall studs.

Attaching To Wall Anchor: This methodallows you to attach mounting bracket tohollow walls (wall areas between studs) orto solid walls (concrete or masonry).

Decide which method better suits your needs.Either method will provide a secure hold forthe mounting bracket.

Marking Screw Locations1. Tape mounting bracket to wall where

heater will be located. Make suremounting bracket is level.

18 3/4"Min.

11"Min.

16"

Adj

oini

ng W

all

Only Insert Mounting Screws Through Last

Hole On Each End

Floor

Figure 11 - Mounting Bracket Clearances

Attaching Mounting Bracket ToWall

Note: Wall anchors, mounting screws, andspacers are in hardware package. The hard-ware package is provided with heater.

Attaching To Wall Stud Method

For attaching mounting bracket to wall studs.

1. Drill holes at marked locations using9/64" drill bit.

2. Place mounting bracket onto wall. Lineup last hole on each end of bracket withholes drilled in wall.

3. Insert mounting screws through bracketand into wall studs.

4. Tighten screws until mounting bracketis firmly fastened to wall studs.

Continued

INSTALLATIONContinued

WARNING: Maintain minimumclearances shown in Figure 11. Ifyou can, provide greater clear-ances from floor and joining wall.

2. Mark screw locations on wall (see Fig-ure 11).

Note: Only mark last hole on each endof mounting bracket. Insert mountingscrews through these holes only.

3. Remove tape and mounting bracketfrom wall.

10 107097




Figure 12 - Folding Anchor

Figure 13 - Popping Open Anchor WingsFor Thin Walls

Figure 14 - Mounting Heater Onto Mount-ing Bracket

Horizontal Slots

Mounting Bracket(attached to wall)

Stand-OutTab

Installing Bottom MountingScrews1. Locate two bottom mounting holes.

These holes are near bottom on backpanel of heater (see Figure 15).

2. Mark screw locations on wall.

3. Remove heater from mounting bracket.

4. If installing bottom mounting screwsinto hollow or solid wall, install wallanchors. Follow steps 1 through 4 un-der Attaching To Wall Anchor Method.If installing bottom mounting screwinto 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-ing holes and wall anchor or drilled hole.

7. Hold spacer in place with one hand.With other hand, insert mounting screwthrough bottom mounting hole andspacer. Place tip of screw in openingof wall anchor or drilled hole.

8. Tighten both screws until heater isfirmly secured to wall. Do not overtighten.

Note: Do not replace front panel at thistime. Replace front panel after makinggas connections and checking for leaks(see pages 12 and 13).

Figure 15 - Installing Bottom MountingScrews

Attaching To Wall Anchor Method

For attaching mounting bracket to hollowwalls (wall areas between studs) or solidwalls (concrete or masonry).

1. Drill holes at marked locations using5/16" drill bit. For solid walls (concreteor masonry), drill at least 1" deep.

2. Fold wall anchor as shown in Figure 12.

3. Insert wall anchor (wings first) intohole. Tap anchor flush to wall.

4. For thin walls (1/2" or less), insert redkey into wall anchor. Push red key to“pop” open anchor wings.IMPORTANT: Do not hammer key!For thick walls (over 1/2" thick) or solidwalls, do not pop open wings.

5. Place mounting bracket onto wall. Lineup last hole on each end of bracket withwall anchors.

6. Insert mounting screws through bracketand into wall anchors.

7. Tighten screws until mounting bracketis firmly fastened to wall.

Placing Heater On MountingBracket1. Locate two horizontal slots on back

panel of heater.

2. Place heater onto mounting bracket.Slide horizontal slots onto stand-outtabs on mounting bracket.

11107097

OWNER’S MANUAL



Continued

Figure 16 - Attaching Heater to HearthBase

Figure 17- Placing Hearth Insert on HeaterBase and Attaching Brass Base Trim

Mounting Heater to OptionalHearth Base1. Lay heater on its back on a table with

the bottom of heater overhanging theedge of the table.

2. Remove 2 shipping screws in bottomof heater. Discard shipping screws.

3. Line up mounting holes on top of hearthbase with holes in bottom of heater (seeFigure 16).

4. Using a Phillips screwdriver, securehearth base to heater with four sheetmetal screws (see Figure 16).

5. Stand heater up on base.

6. Place hearth insert in hearth base asshown in Figure 17.

7. Assemble brass trim (see steps 1through 7 under Assembling and At-taching Brass Trim, page 4).

8. Slide base trim on heater base. Attachbrass trim to base with two brass screwsincluded as shown in Figure 17.

Securing Hearth Base to Floor1. Position hearth base in desired location.

Mark holes for drilling (See Figure 16).Remove hearth base.

2. For carpeted floor, make a small cutwith a sharp knife at marked locationsbefore drilling.

If securing to a wood floor, drill a 3/4"deep hole using a 1/8" diameter drillbit. Do not use anchors in wood floors.

If securing to a concrete floor, drill a 13/8" deep hole using a 1/4" diameterconcrete drill bit. Completely insert an-chors into each hole.

3. Mount heater to hearth base followingsteps under Mounting Heater to Op-tional Hearth Base. After mountingheater, position heater and hearth baseover drilled holes. With slotted screw-driver, secure hearth base to floor withfour wood screws.

B. MOUNTING HEATER ONOPTIONAL HEARTH BASETools needed:

• #2 Phillips screwdriver

• slotted screwdriver

• electric drill (if securing base to floor)

The optional hearth base kit includes thefollowing:

• 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” modelhearth base to floor. You must secure the “B”and “C” model hearth bases to floor. Tosecure hearth base to floor, follow instruc-tions under Securing Hearth Base to Floor. Ifnot securing hearth base to floor, proceed toMounting Heater to Optional Hearth Base.

Brass BaseTrim

HearthInsert

Screw

Base

Holes for SecuringHeater to Floor

Shipping Screw Bottom of Heater

Sheet MetalScrew

MountingHoles

12 107097




C. MOUNTING HEATER TOOPTIONAL MANTELSee Instructions IncludedWith Mantel Kit.

Assembling Mantel

IMPORTANT: Only use the optional man-tels specified in this manual. See Accesso-ries, page 23 for proper mantel kits. Thisheater is only approved for use with modelsGMF800/GMU801 series, GM900F/GM901U series, GM902F/GM903U series,GM700F/GM701U series, and GM702F/GM703U series mantel kits. Using any othermantel will void the CSA approval for thisheater. Only use models GMF800/GMU801series, GM900F/GM901U series, GM902F/GM903U series, GM700F/GM701U series,and GM702F/GM703U series mantels withthis heater. Do not use these mantels withany other product.

* A CSA design-certified equipment shutoff valve with 1/8" NPT tap is an acceptablealternative to test gauge connection. Purchase the optional CSA design-certified equipmentshutoff valve from your dealer. See Accessories, page 23.

Figure 18 - Gas Connection

CONNECTING TO GASSUPPLY

WARNING: A qualified serviceperson must connect heater to gassupply. Follow all local codes.

WARNING: Never connectheater to private (non-utility) gaswells. This gas is commonlyknown as wellhead gas.

IMPORTANT: Check gas line pressure be-fore connecting heater to gas line. Gas linepressure must be no greater than 14 inchesof water. If gas line pressure is higher,heater regulator damage could occur.

CAUTION: Use only new,black iron or steel pipe. Inter-nally-tinned copper tubing maybe used in certain areas. Checkyour local codes. Use pipe of 1/2"or greater diameter to allowproper gas volume to heater. Ifpipe is too small, undue loss ofpressure will occur.

Installation must include an equipmentshutoff valve, union, and plugged 1/8" NPTtap. Locate NPT tap within reach for testgauge hook up. NPT tap must be upstreamfrom heater (see Figure 18).

IMPORTANT: Install an equipment shutoffvalve in an accessible location. The equip-ment shutoff valve is for turning on orshutting off the gas to the appliance.

Apply pipe joint sealant lightly to malethreads. This will prevent excess sealantfrom going into pipe. Excess sealant in pipecould result in clogged heater valves.

CAUTION: Use pipe joint seal-ant that is resistant to liquid pe-troleum (LP) gas.

We recommend that you install a sedimenttrap in supply line as shown in Figure 18.Locate sediment trap where it is withinreach for cleaning. Install in piping systembetween fuel supply and heater. Locate sedi-ment trap where trapped matter is not likelyto freeze. A sediment trap traps moistureand contaminants. This keeps them fromgoing into heater controls. If sediment trapis not installed or is installed wrong, heatermay not run properly.

IMPORTANT: Hold pressure regulator withwrench when connecting it to gas pipingand/or fittings.

Tee Joint

ReducerBushing to1/8" NPT

1/8" NPTPlug Tap

Test GaugeConnection *

Tee Joint

PipeNipple

Cap

SedimentTrap

PressureRegulator

3/8" NPTPipe Nipple

GroundUnionJoint

Heater Cabinet

3" Minimum

Note: Burner bracket notshown for clarity

Equipment ShutoffValve *

From Gas Meter(5" W.C. to 10.5"W.C. Pressure)

WARNING: This appliance re-quires a 3/8" NPT (National PipeThread) inlet connection to thepressure regulator.

13107097

OWNER’S MANUAL


Pressure Testing Gas SupplyPiping System

Test Pressures In Excess Of 1/2 PSIG(3.5 kPa)

1. Disconnect appliance with its appliancemain gas valve (control valve) and equip-ment shutoff valve from gas supply pip-ing system. Pressures in excess of 1/2 psigwill damage heater regulator.

2. Cap off open end of gas pipe whereequipment shutoff valve was connected.

3. Pressurize supply piping system byeither using compressed air or open-ing main gas valve located on or neargas meter.

4. Check all joints of gas supply pipingsystem. Apply mixture of liquid soapand water to gas joints. Bubbles form-ing show a leak.

5. Correct all leaks at once.

6. Reconnect heater and equipmentshutoff valve to gas supply. Check re-connected fittings for leaks.

ONPOSITION

OFFPOSITION

Open

Closed

EquipmentShutoffValve

EquipmentShutoffValve

Thermostat GasValve Location

Figure 19 - Equipment Shutoff Valve

Gas Meter

Figure 20 - Checking Gas Joints

Test Pressures Equal To or Less Than1/2 PSIG (3.5 kPa)

1. Close equipment shutoff valve (see Fig-ure 19).

2. Pressurize supply piping system byeither using compressed air or open-ing main gas valve located on or neargas meter.

3. Check all joints from gas meter toequipment shutoff valve (see Figure20). Apply mixture of liquid soap andwater to gas joints. Bubbles formingshow a leak.


Pressure Testing Heater GasConnections1. Open equipment shutoff valve (see Fig-

ure 19).

2. Open main gas valve located on or neargas meter.

3. Make sure control knob of heater is inthe OFF position.

4. Check all joints from equipment shutoffvalve to thermostat gas valve (see Fig-ure 20). Apply mixture of liquid soapand water to gas joints. Bubbles form-ing show a leak.


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 toAppliance, page 14).

8. Replace front panel.


CHECKING GASCONNECTIONS

WARNING: Test all gas pip-ing and connections for leaksafter installing or servicing. Cor-rect all leaks at once.

WARNING: Never use an openflame to check for a leak. Apply amixture of liquid soap and waterto all joints. Bubbles forming showa leak. Correct all leaks at once.

14 107097



OPERATINGHEATER

TO TURN OFF GASTO APPLIANCE

Pilot Burner

Thermocouple

Figure 22 - Pilot

7. Keep control knob pressed in for 30seconds after lighting pilot. After 30seconds, release control knob.• If control knob does not pop up

when released, contact a qualifiedservice person or gas supplier forrepairs.

Note: If pilot goes out, repeat steps3 through 7. This heater has a safetyinterlock system. Wait one (1) minutebefore lighting pilot again.

8. Turn control knob counterclockwise to desired heating level. The

main burner should light. Set controlknob to any heat level between HIand LO.

LIGHTINGINSTRUCTIONS

Figure 21 - Control Knob In The OFFPosition

PILOT

LO

OFF HI

IGNITOR

Control KnobIgnitor Button

1. STOP! Read the safety informationin column 1.

2. Make sure equipment shutoff valveis fully open.

3. Turn control knob clockwise to the OFF position.

4. Wait five (5) minutes to clear out anygas. Then smell for gas, includingnear the floor. If you smell gas,STOP! Follow “B” in the safety in-formation, column 1. If you don’tsmell gas, go to the next step.

5. Turn control knob counterclockwise to PILOT position. Press in

control knob for five (5) seconds (seeFigure 21).Note: You may be running thisheater for the first time after hook-ing up to gas supply. If so, the con-trol knob may need to be pressed infor 30 seconds. This will allow air tobleed from the gas system.

6. With control knob pressed in, pushdown and release ignitor button.This will light pilot. The pilot is at-tached to the front of burner. Ifneeded, keep pressing ignitor but-ton until pilot lights.Note: If pilot does not stay lit, referto Troubleshooting, pages 16 through18. Also contact a qualified serviceperson or gas supplier for repairs.Until repairs are made, light pilot withmatch. To light pilot with match, seeManual Lighting Procedure, page 15.

Ignitor Electrode

FOR YOUR SAFETYREAD BEFORE

LIGHTING

Shutting Off Heater1. Turn control knob clockwise

to the OFF position.2. Turn off all electric power to the ap-

pliance if service is to be performed.

Shutting Off Burner Only (pilotstays lit)

Turn control knob clockwise tothe PILOT position.

A. This appliance has a pilot which mustbe lighted by hand. When lighting thepilot, follow these instructions exactly.

B. BEFORE LIGHTING smell allaround the appliance area for gas. Besure to smell next to the floor becausesome gas is heavier than air and willsettle on the floor.WHAT TO DO IF YOU SMELLGAS• Do not try to light any appliance.• Do not touch any electric switch; do

not use any phone in your building.• Immediately call your gas supplier

from a neighbor’s phone. Followthe gas supplier’s instructions.

• If you cannot reach your gas sup-plier, call the fire department.

C. Use only your hand to push in or turnthe gas control knob. Never use tools.If the knob will not push in or turnby hand, don’t try to repair it, call aqualified service technician or gassupplier. Force or attempted repairmay result in a fire or explosion.

D. Do not use this appliance if any parthas been under water. Immediatelycall a qualified service technician toinspect the appliance and to replaceany part of the control system andany gas control which has been un-der water.

WARNING: If you do not fol-low these instructions exactly, afire or explosion may result caus-ing property damage, personalinjury or loss of life.

CAUTION: Do not try to adjustheating levels by using the equip-ment shutoff valve.

15107097

OWNER’S MANUAL


OPERATINGHEATERContinued

THERMOSTATCONTROL OPERATION

The thermostatic control used on thisheater differs from standard thermostats.Standard thermostats simply turn on andoff the burner. The thermostat used onthis heater senses the room temperature.The thermostat adjusts the amount of gasflow to the burner. This increases or de-creases the burner flame height. At timesthe room may exceed the set temperature.If so, the burner will shut off. The burnerwill cycle back on when room temperaturedrops below the set temperature.

The control knob can be set to any heatlevel between HI and LO.

Note: The thermostat sensing bulb mea-sures the temperature of air near theheater cabinet. This may not always agreewith room temperature (depending onhousing construction, installation loca-tion, room size, open air temperatures,etc.). Frequent use of your heater will letyou determine your own comfort levels.

MANUAL LIGHTINGPROCEDURE

1. Remove front panel (see Figure 2,page 3).

2. Follow steps 1 through 5 under Light-ing Instructions, page 14.

3. With control knob pressed in, strikematch. Hold match to pilot until pi-lot lights.

4. Keep control knob pressed in for 30seconds after lighting pilot. After 30seconds, release control knob. Nowfollow step 8 under Lighting Instruc-tions, page 14.

5. Replace front panel.

Figure 23 - Correct Pilot Flame Pattern

Thermocouple

Thermocouple

INSPECTINGBURNER

Figure 24 - Incorrect Pilot Flame Pattern

Pilot Burner

Pilot Burner

Check pilot flame pattern and burner flamepattern often.

PILOT FLAME PATTERNFigure 23 shows a correct pilot flame pattern.Figure 24 shows an incorrect pilot flamepattern. The incorrect pilot flame is not touch-ing the thermocouple. This will cause thethermocouple to cool. When the thermo-couple cools, the heater will shut down.

If pilot flame pattern is incorrect, as shownin Figure 24

• turn heater off (see To Turn Off Gas toAppliance, page 14)

• see Troubleshooting, pages 16 through 18

BURNER FLAME PATTERNFigure 25 shows a correct burner flamepattern. Figure 26 shows an incorrect burnerflame pattern. The incorrect burner flamepattern shows yellow tipping of the flame.It also shows the flame higher than oneinch above the log.

Note: When using the heater the first time,the flame will be yellow for approximatelyone hour until the log cures.

NOTICE: Do not mistake orangeflames with yellow tipping. Dirtor other fine particles enter theheater and burn causing briefpatches of orange flame.

WARNING: If yellow tippingoccurs, your heater could pro-duce increased levels of carbonmonoxide. If burner flame pat-tern shows yellow tipping, followinstructions, bottom of this page.

Top of Flame EvenWith Top of Log

Yellow Tipping

If burner flame pattern is incorrect, as shownin Figure 26

• turn heater off (see To Turn Off Gas toAppliance, page 14)

• see Troubleshooting, pages 16 through 18

Figure 26 - Incorrect Burner Flame Pattern

Figure 25 - Correct Burner Flame Pattern

16 107097



TROUBLESHOOTING WARNING: Turn off and un-plug heater and let cool beforeservicing. Only a qualified ser-vice person should service andrepair heater.

REMEDY

1. Replace ignitor2. Replace ignitor3. Reconnect ignitor cable

4. Free ignitor cable if pinched by anymetal or tubing. Keep ignitor cable dry

5. Tighten nut holding piezo ignitor toheater cabinet. Nut is located insideheater cabinet at top

6. Replace ignitor cable7. Replace piezo ignitor

1. Turn on gas supply or open equipmentshutoff valve

2. Turn control knob to PILOT position3. Press in control knob while in PILOT

position4. Continue holding down control knob.

Repeat igniting operation until air is re-moved

5. Clean ODS/pilot (see Cleaning andMaintenance, page 19) or replace ODS/pilot assembly

6. Replace gas regulator

1. Press in control knob fully2. After ODS/pilot lights, keep control

knob pressed in 30 seconds3. Wait one minute for safety interlock sys-

tem to reset. Repeat ignition operation4. Fully open equipment shutoff valve5. Hand tighten until snug, then tighten 1/4

turn more6. A) Contact local natural gas company

B) Clean ODS/pilot (see Cleaning andMaintenance, page 19) or replace ODS/pilot assembly

7. Replace thermocouple8. Replace control valve

POSSIBLE CAUSE

1. Ignitor electrode positioned wrong2. Ignitor electrode broken3. Ignitor electrode not connected to igni-

tor cable4. Ignitor cable pinched or wet

5. Piezo ignitor nut is loose

6. Broken ignitor cable7. Bad piezo ignitor

1. Gas supply turned off or equipmentshutoff valve closed

2. Control knob not in PILOT position3. Control knob not pressed in while in

PILOT position4. Air in gas lines when installed

5. ODS/pilot is clogged

6. Gas regulator setting is not correct

1. Control knob not fully pressed in2. Control knob not pressed in long enough

3. Safety interlock system has been triggered

4. Equipment shutoff valve not fully open5. Thermocouple connection loose at con-

trol valve6. 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 ofthe following:A) Low gas pressureB) Dirty or partially clogged ODS/pilot

7. Thermocouple damaged8. Control valve damaged

OBSERVED PROBLEM

When ignitor button is pressed, there is nospark at ODS/pilot

When ignitor button is pressed, there isspark at ODS/pilot but no ignition

ODS/pilot lights but flame goes out whencontrol knob is released

CAUTION: Never use a wire,needle, or similar object to cleanODS/pilot. This can damage ODS/pilot unit.

Note: For additional help, visit DESAInternational’s technical service web siteat www.desatech.com .

Note: All troubleshooting items are listed inorder of operation.

www.desatech.com

17107097

OWNER’S MANUAL


REMEDY

1. Clean burner (see Cleaning and Mainte-nance, page 19) or replace burner orifice

2. Replace burner orifice3. Contact local natural gas company

1. Contact local natural gas company2. Clean burner (see Cleaning and Mainte-

nance, page 19) or replace burner orifice


2. Replace burner3. Replace gas regulator

1. Check burner for dirt and debris. Iffound, clean burner (see Cleaning andMaintenance, page 19)

2. Replace gas regulator

1. Problem will stop after a few hours ofoperation

1. Turn control knob to LO position andlet warm up for a minute

2. Operate burner until air is removed fromline. Have gas line checked by localnatural gas company

3. Observe minimum installation clear-ances (see Figure 9, page 8)


1. Turn heater off when using furniturepolish, wax, carpet cleaners, or similarproducts

TROUBLESHOOTINGContinued

OBSERVED PROBLEM

Burner does not light after ODS/pilot is lit

Delayed ignition of burner

Burner backfiring during combustion

Yellow flame during burner combustion

Slight smoke or odor during initial operation

Heater produces a whistling noise whenburner is lit

White powder residue forming within burnerbox or on adjacent walls or furniture

POSSIBLE CAUSE

1. Burner orifice is clogged

2. Burner orifice diameter is too small3. Inlet gas pressure is too low

1. Manifold pressure is too low2. Burner orifice is clogged

1. Burner orifice is clogged or damaged

2. Burner damaged3. Gas regulator defective

1. Not enough air

2. Gas regulator defective

1. Residues from manufacturing processes

1. Turning control knob to HI positionwhen 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 furniture pol-ish, wax, carpet cleaners, etc. turn intowhite powder residue

Continuedwww.desatech.com

18 107097



TROUBLESHOOTINGContinued

WARNING: If you smell gas• Shut off gas supply.• Do not try to light any appliance.• Do not touch any electrical switch; do not use any phone in your

building.• Immediately call your gas supplier from a neighbor’s phone. Follow the

gas supplier’s instructions.• If you cannot reach your gas supplier, call the fire department.

IMPORTANT: Operating heater where impurities in air exist may create odors. Cleaningsupplies, 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 noisejust 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 OFFposition

Gas odor during combustion

POSSIBLE CAUSE

1. Metal expanding while heating or con-tracting while cooling

1. Heater burning vapors from paint, hairspray, glues, etc. (see IMPORTANTstatement above)

2. Gas leak. See Warning statement attop of page

1. Not enough fresh air is available2. Low line pressure3. ODS/pilot is partially clogged


2. Control valve defective

1. Foreign matter between control valveand burner


REMEDY

1. This is common with most heaters. Ifnoise is excessive, contact qualified ser-vice person

1. Ventilate room. Stop using odor caus-ing products while heater is running

2. Locate and correct all leaks (see Check-ing Gas Connections, page 13)

1. Open window and/or door for ventilation2. Contact local natural gas company3. Clean ODS/pilot (see Cleaning and

Maintenance, page 19)


2. Replace control valve

1. Take apart gas tubing and remove for-eign matter


www.desatech.com

19107097

OWNER’S MANUAL


CLEANING ANDMAINTENANCE

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 keepcontrol areas, burner, and circu-lating air passageways of heaterclean. Inspect these areas ofheater before each use. Haveheater inspected yearly by a quali-fied service person. Heater mayneed more frequent cleaning dueto excessive lint from carpeting,pet hair, bedding material, etc.

WARNING: Turn off heaterand let cool before cleaning.

REPLACEMENTPARTSNote: Use only original replacement parts.This will protect your warranty coverage forparts replaced under warranty.

PARTS UNDER WARRANTYContact authorized dealers of this product.If they can’t supply original replacementpart(s), call DESA International’s Techni-cal Service Department at 1-800-323-5190for 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, we will ask you to return the defec-tive part to the factory.

PARTS NOT UNDERWARRANTYContact authorized dealers of this product.If they can’t supply original replacementpart(s), call DESA International’s PartsDepartment at 1-800-972-7879 for referralinformation.

When calling DESA International, have ready

• model number of your heater

• the replacement part number

SERVICE HINTSWhen Gas Pressure Is Too Low• pilot will not stay lit

• burner(s) will have delayed ignition

• heater will not produce specified heat

When Gas Quality Is Bad• pilot will not stay lit

• burner(s) will produce flames and soot

• heater will backfire when lit

You may feel your gas pressure is too low orgas quality is bad. If so, contact your localnatural gas supplier.

CLEANING BURNERINJECTOR HOLDER ANDPILOT AIR INLET HOLEThe primary air inlet holes allow the properamount of air to mix with the gas. Thisprovides a clean burning flame. Keep theseholes clear of dust, dirt, lint, and pet hair.Clean these air inlet holes prior to eachheating season. Blocked air holes will cre-ate soot. We recommend that you clean theunit every three months during operationand have heater inspected yearly by a quali-fied service person.

We also recommend that you keep the burnertube and pilot assembly clean and free ofdust and dirt. To clean these parts we recom-mend using compressed air no greater than30 PSI. Your local computer store, hard-ware store, or home center may carry com-pressed air in a can. You can use a vacuumcleaner in the blow position. If using com-pressed air in a can, please follow the direc-tions on the can. If you don't follow direc-tions on the can, you could damage the pilotassembly.

1. Shut off the unit, including the pilot.Allow the unit to cool for at least thirtyminutes.

2. Inspect burner, pilot, and primary airinlet holes on injector holder for dustand dirt (see Figure 27).

3. Blow air through the ports/slots andholes in the burner.

Figure 27 - Injector Holder On OutletBurner Tube

4. Check the injector holder located at theend of the burner tube again. Removeany large particles of dust, dirt, lint, orpet hairs with a soft cloth or vacuumcleaner nozzle.

5. Blow air into the primary air holes onthe injector holder.

6. In case any large clumps of dust havenow been pushed into the burner repeatsteps 3 and 4.

Clean the pilot assembly also. A yellow tipon the pilot flame indicates dust and dirt inthe pilot assembly. There is a small pilot airinlet hole about two inches from where thepilot flame comes out of the pilot assembly(see Figure 28). With the unit off, lightlyblow air through the air inlet hole. You mayblow through a drinking straw if compressedair is not available.

BurnerTube

InjectorHolder

Primary AirInlet Hole

Figure 28 - Pilot Inlet Air Hole

PilotAssembly

Pilot Air Inlet Hole

Ports/Slots

20 107097



ILLUSTRATEDPARTSBREAKDOWNVMH3000TNA

1

2

9

10

10

1213

14

15

17

19

20

23

24

25

6

26

6

7

1

1

3 1

28

5

1618

4

22

111

21

11

8

27

21107097

OWNER’S MANUAL


PARTS LISTVMH3000TNA

This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listedunder Replacement Parts on page 19 of this manual.

KEY VMH3000TNANO. PART NO. DESCRIPTION QTY.

1 098304-01 Screw, #10 x 3/8" 192 100566-01CK Front Panel 13 100573-01BR Screen Assembly 14 100568-02 Burner Shield 15 107122-01 Log, Service Kit 16 098303-02 Screw, #8 x 3/8" 47 099066-01 Mounting Bracket 18 M11084-26 Screw, #10 x 3/8" 39 107058-01 Deflector Unit 110 098271-03 Ignitor Cable 111 098249-01 Nut, M5 212 107485-01 ODS/Pilot Assembly 113 103447-01 Burner 114 099387-03 3/16" Pilot Tubing 115 103845-12 Injector 116 NJF-8C Nut, Hex 117 099415-11 Pressure Regulator 118 103408-01 Burner Bracket 219 103255-01 3/8" Outlet (Burner) Tubing 120 103256-01 3/8" Inlet Tubing 121 107218-01 Deflector Baffle 122 107060-01 Log Strap 223 098522-12 Thermostat Gas Valve 124 105556-01 Cabinet 125 097159-04 Piezo Ignitor 126 099211-01 Screw, #10 x 2.5" 227 104373-02 Baffle 128 107061-01 Hood 1

PARTS AVAILABLE — NOT SHOWN

100562-01 Lighting Instructions Plate 1100563-01 Warning Plate 1101899-01 Brass Trim Assembly 1100769-02 Brass Trim Hardware 1100642-01 Hardware Package 1100565-01 Warning Plate Fastener Kit 1101416-44 Instructional Video 1

22 107097



TECHNICALSERVICEYou may have further questions about in-stallation, operation, or Trouble Shooting.If so, contact DESA International’s Techni-cal Service Department at 1-800-323-5190.

You can also visit DESA International’stechnical service web site atwww.desatech.com.

SPECIFICATIONSBtu (Variable) 15,000/30,000Type Gas Natural OnlyIgnition PiezoPressure Regulator Setting 3" W.C.Inlet Gas Pressure (in. of water) *

Maximum 10.5"Minimum 5"

Dimensions, Inches (H x W x D)Heater 23.75 x 25.9 x 8.5Carton 25.8 x 28.7 x 10.1

Weight (pounds)Heater 29Shipping 35

* For purposes of input adjustment

23107097

OWNER’S MANUAL


PREMIER MANTELUnfinished - GM903U SeriesFinished - GM902F SeriesWhite Lacquer Finish - GM904W(differs slightly from illustration)

For use with heater. Features a built-in base.Sturdy hardwood construction with classicstyling and attractive molding. Available ina walnut finish or an unfinished hardwood,ready to stain or paint. Complete assemblyand installation instructions included.

CORNER MANTELUnfinished - GM703U SeriesFinished - GM702F Series

For use with heater. Features a built-in base.Space-saving corner design featuring clean,classic lines. Available in a walnut finish oran unfinished hardwood, ready to stain orpaint. Complete assembly and installationinstructions included.

EQUIPMENT SHUTOFFVALVE - GA5010Equipment shutoff valve with 1/8" NPT tap.

HEARTH BASE - GHB802SeriesFor locating heater on the floor. Includesbrass trim. Complete installation instruc-tions included.

ACCESSORIESPurchase these heater accessories from yourlocal dealer. If they can not supply theseaccessories call DESA International’s SalesDepartment at 1-800-458-2472 for infor-mation. You can also write to the addresslisted on the back page of this manual.

FAN KITSGA3100A - Manually-ControlledGA3200TA - Thermostatically-ControlledProvides better heat distribution. Makesheater more efficient. Complete installationand operating instructions included.

CLEANING KIT - GCK(Not Shown)

Your vent-free gas appliance requires regu-lar cleaning and maintenance to preventperformance problems. This kit gives youthe tools and instructions to make it easy toclean all critical areas of your appliance.

KEEP THIS WARRANTY

WARRANTY INFORMATION

Model ________________________________

Serial No. _____________________________

Date Purchased ________________________

Always specify model and serial numbers when communicating with the factory.

We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our standard writtenwarranty. We make no other warranty, expressed or implied.

LIMITED WARRANTYVENT-FREE NATURAL GAS LOG HEATERS

DESA International warrants this product to be free from defects in materials and components for four (4) years from the date offirst purchase, provided that the product has been properly installed, operated and maintained in accordance with all applicableinstructions. To make a claim under this warranty the Bill of Sale or cancelled check must be presented.

This warranty is extended only to the original retail purchaser. This warranty covers the cost of part(s) required to restore this heaterto proper operating condition and an allowance for labor when provided by a DESA Authorized Service Center. Warranty part(s)MUST be obtained through authorized dealers of this product and/or DESA International who will provide original factoryreplacement parts. Failure to use original factory replacement parts voids this warranty. The heater MUST be installed by a qualifiedinstaller 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 becomedamaged as a result of misuse, accidents, lack of proper maintenance or defects caused by improper installation. Travel, diagnosticcost, labor, transportation and any and all such other costs related to repairing a defective heater will be the responsibility of the owner.

TO THE FULL EXTENT ALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALE OF THEPRODUCT; THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED WARRANTIES ANDLIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES, INCLUDING WARRANTIES OF MERCHANTA-BILITY AND FITNESS FOR A PARTICULAR PURPOSE TO FOUR (4) YEARS ON ALL COMPONENTS FROM THE DATEOF FIRST PURCHASE; AND DESA INTERNATIONAL’S LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICEOF THE PRODUCT AND DESA INTERNATIONAL SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSO-EVER INCLUDING INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES.

Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation of incidental orconsequential damages, so the above limitation on implied warranties, or exclusion or limitation on damages may not apply to you.

This warranty gives you specific legal rights, and you may also have other rights that vary from state to state.

For information about this warranty write:

2701 Industrial DriveP.O. Box 90004Bowling Green, KY 42102-9004

www.desatech.com

INTERNATIONAL

107097-01Rev. A05/00NOT A UPC

107097 01

VENT-FREE NATURAL GAS MINI-HEARTH HEATER Logs/model_AVMH3000TNAR_manu… · VENT-FREE NATURAL GAS...

Documents

Transcript of VENT-FREE NATURAL GAS MINI-HEARTH HEATER Logs/model_AVMH3000TNAR_manu… · VENT-FREE NATURAL GAS...