WARNING: If the information in this manual is not fol- lowed ... - Desa

AIR FOR COMBUSTIONAND VENTILATIONContinuedDETERMINING FRESH-AIR FLOWFOR HEATER LOCATIONDetermining if You Have a Confined orUnconfined SpaceUse this work sheet to determine if you have a confinedor unconfined space.Space: Includes the room in which you will installheater plus any adjoining rooms with doorless passagewaysor ventilation grills between the rooms.1. Determine the volume of the space (length xwidth 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 issupplied with grills or openings, add the volumeof these rooms to the total volume of the space.2. Multiply the space volume by 20 to determinethe maximum Btu/Hr the space can support._______ (volume of space) x 20 = (MaximumBtu/Hr the space can support)Example: 2560 cu. ft. (volume of space) x 20 =51,200 (maximum Btu/Hr the space can support)3. Add the Btu/Hr of all fuel burning appliances inthe space.Vent-free heater ______________ Btu/HrGas water heater* ______________ Btu/HrGas furnace ______________ Btu/HrVented gas heater ______________ Btu/HrGas fireplace logs ______________ Btu/HrOther gas appliances* + __________ Btu/HrTotal= __________ Btu/Hr* Do not include direct-vent gas appliances. Direct-ventdraws combustion air from the outdoorsand vents to the outdoors.Example:Gas water heater ______________ 40,000 Btu/HrVent-free heater + _____________ 30,000 Btu/HrTotal= _____________ 70,000 Btu/Hr4. Compare the maximum Btu/Hr the space cansupport with the actual amount of Btu/Hr used._______________Btu/Hr (maximum the spacecan support)_______________Btu/Hr (actual amount ofBtu/Hr used)Example:51,200 Btu/Hr (maximum the space can support)70,000 Btu/Hr (actual amount of Btu/Hr used)The space in the above example is a confined spacebecause the actual Btu/Hr used is more than the maximumBtu/Hr the space can support. You must provideadditional fresh air. Your options are as follows:A. Rework worksheet, adding the space of an adjoiningroom. If the extra space provides an unconfinedspace, remove door to adjoining room or addventilation grills between rooms. See VentilationAir From Inside Building, page 7.B. Vent room directly to the outdoors. See VentilationAir From Outdoors, page 7.C. Install a lower Btu/Hr heater, if lower Btu/Hr sizemakes room unconfined.If the actual Btu/Hr used is less than the maximumBtu/Hr the space can support, the space is an unconfinedspace. You will need no additional fresh airventilation.WARNING: If the area inwhich the heater may be operatedis smaller than that definedas an unconfined space or if thebuilding is of unusually tightconstruction, provide adequatecombustion and ventilation airby one of the methods describedin the National Fuel Gas Code,ANSI Z223.1/NFPA 54 Section 5.3or applicable local codes.6www.desatech.com 114683-01B

AIR FOR COMBUSTIONAND VENTILATIONContinuedVENTILATION AIRVentilation Air From Inside BuildingThis fresh air would come from an adjoining unconfinedspace. When ventilating to an adjoiningunconfined space, you must provide two permanentopenings: one within 12” of the ceiling andone within 12” of the floor on the wall connectingthe two spaces (see options 1 and 2, Figure 2). Youcan also remove door into adjoining room (seeoption 3, Figure 2). Follow the National Fuel GasCode, ANSI Z223.1/NFPA 54, Section 5.3, Air forCombustion and Ventilation for required size ofventilation grills or ducts.Ventilation Air From OutdoorsProvide extra fresh air by using ventilation grills orducts. You must provide two permanent openings:one within 12” of the ceiling and one within 12”of the floor. Connect these items directly to theoutdoors or spaces open to the outdoors. Thesespaces include attics and crawl spaces. Follow theNational Fuel Gas Code, ANSI Z223.1/NFPA 54,Section 5.3, Air for Combustion and Ventilation forrequired size of ventilation grills or ducts.IMPORTANT: Do not provide openings for inletor outlet air into attic if attic has a thermostatcontrolledpower vent. Heated air entering the atticwill activate the power vent.12"OutletAirInletAirOutletAirInlet AirVentilatedAtticVentilatedCrawl SpaceTo AtticToCrawlSpaceFigure 3 - Ventilation Air from OutdoorsINSTALLATIONNOTICE: This heater is intendedfor use as supplemental heat.Use this heater along with yourprimary heating system. Do notinstall this heater as your primaryheat source. If you have acentral heating system, you mayrun system’s circulating blowerwhile using heater. This will helpcirculate the heat throughout thehouse. In the event of a poweroutage, you can use this heateras your primary heat source.WARNING: A qualified serviceperson must install heater.Follow all local codes.VentilationGrillsinto AdjoiningRoom,Option 1OrRemoveDoor intoAdjoiningRoom,Option 3Ventilation GrillsInto Adjoining Room,Option 2CHECK GAS TYPEUse only the correct type of gas (natural or propane/LP).If your gas supply is not the correct gastype, do not install heater. Call dealer where youbought heater for proper type heater.12"WARNING: This applianceis equipped for (natural or propane/LP)gas. Field conversionis not permitted.Figure 2 - Ventilation Air from InsideBuilding114683-01B www.desatech.com7

INSTALLATION ITEMSBefore installing heater, make sure you have theitems listed below.• for propane/LP gas, external regulator (suppliedby installer)• piping (check local codes)• sealant (resistant to propane/LP gas)• equipment shutoff valve *• ground joint union• sediment trap• tee joint• pipe wrench• for natural gas, test gauge connection** A CSA design-certified equipment shutoff valvewith 1/8" NPT tap is an acceptable alternative totest gauge connection. The optional CSA designcertifiedequipment shutoff valve can be purchasedfrom your dealer. See Accessories, page 30.LOCATING HEATERThis heater is designed to be mounted on a wall.WARNING: Maintain theminimum clearances shownin Figure 4. If you can, providegreater clearances from floor,ceiling and joining wall.You can locate heater on floor, away from a wall.An optional floor mounting stand is needed. Purchasethe floor mounting stand from your dealer.See Accessories, page 30.WARNING: Never install theheater• in a bedroom or bathroom• in a recreational vehicle• where curtains, furniture,clothing or other flammableobjects are less than 36 inchesfrom the front, top or sides ofthe heater• as a fireplace insert• in high traffic areas• in windy or drafty areasINSTALLATIONContinued CAUTION: This heater createswarm air currents. Thesecurrents move heat to wall surfacesnext to heater. Installingheater next to vinyl or cloth wallcoverings or operating heaterwhere impurities (such as, butnot limited to, tobacco smoke,aromatic candles, cleaning fluids,oil or kerosene lamps, etc.) inthe air exist, may discolor wallsor cause odors.IMPORTANT: Vent-free heaters add moisture tothe air. Although this is beneficial, installing heaterin rooms without enough ventilation air may causemildew to form from too much moisture. See Airfor Combustion and Ventilation, page 5. If high humidityis experienced, a dehumidifier may be usedto help lower the water vapor content in the air.CAUTION: When installingheater in a home garage• heater pilot and burner must beat least 18 inches above floor• locate heater where movingvehicle will not hit itFor convenience and efficiency, install heater• where there is easy access for operation, inspectionand service• in coldest part of roomAn optional fan kit is available from your dealer.See Accessories, page 30. If planning to use fan,locate heater near an electrical outlet.6"MinimumFromSides OfHeaterLeftSideCEILINGFLOOR36"MinimumRightSideMinimum ToTop SurfaceOf Carpeting,14" Tile Or OtherCombustibleMaterialFigure 4 - Mounting Clearances AsViewed From Front of Heater8www.desatech.com 114683-01B

INSTALLATIONContinuedTHERMOSTAT SENSING BULB(Thermostat Models Only)The thermostat sensing bulb has been placedbelow the heater.1. Place clamp on thermostat sensing bulb asshown in Figure 5. Clamp is provided inhardware package.2. Snap clamp into upper mounting hole as shownin Figure 5. Mounting hole is located on lowerleft edge on back of heater. Make sure thethermostat sensing bulb is pointing up.ThermostatSensing BulbClampFigure 5 - Attaching Thermostat SensingBulbINSTALLING HEATER TO WALLMounting BracketLocate mounting bracket in heater carton. Removemounting bracket from heater carton.Figure 6 - Mounting BracketRemoving Front Panel Of Heater1. Remove the four painted screws, two on eachside of front panel.2. Pull bottom of front panel forward, then out.3. Remove any remaining packaging materials.Figure 7 - Removing Front Panel OfHeaterMethods For Attaching Mounting BracketTo WallOnly use last hole on each end of mounting bracketto attach bracket to wall. These two holes are 14inches apart from their centers. Attach mountingbracket to wall in one of two ways:1. Attaching to wall stud2. Attaching to wall anchorAttaching to Wall Stud: This method provides thestrongest hold. Insert mounting screws throughmounting bracket and into wall studs.Attaching to Wall Anchor: This method allows youto attach mounting bracket to hollow walls (wallareas between studs) or to solid walls (concreteor masonry).Decide which method better suits your needs.Either method will provide a secure hold for themounting bracket.Marking Screw Locations1. Tape mounting bracket to wall where heaterwill be located. Make sure mounting bracketis level.WARNING: Maintain minimumclearances shown in Figure8, page 10. If you can, providegreater clearances from floorand joining wall.114683-01B www.desatech.com9

INSTALLATIONContinued2. Mark screw locations on wall (see Figure 8).Note: Only mark last hole on each end ofmounting bracket. Insert mounting screwsthrough these holes only.3. Remove tape and mounting bracket fromAdjoining Wall12"Min.14"Only Insert MountingScrews Through LastHole On Each EndFloor32"Min.Figure 8 - Mounting Bracket ClearancesAttaching Mounting Bracket To WallNote: Wall anchors, mounting screws and spacersare in hardware package. The hardware packageis provided with heater.Attaching To Wall Stud MethodFor attaching mounting bracket to wall studs1. Drill holes at marked locations using 9/64"drill bit.2. Place mounting bracket onto wall. Line up lasthole on each end of bracket with holes drilledin wall.3. Insert mounting screws through bracket andinto wall studs.4. Tighten screws until mounting bracket isfirmly fastened to wall studs.Attaching To Wall Anchor MethodFor attaching mounting bracket to hollow walls(wall areas between studs) or solid walls (concreteor masonry)1. Drill holes at marked locations using 5/16"drill bit. For solid walls (concrete or masonry),drill at least 1" deep.2. Fold wall anchor as shown in Figure 9.3. Insert wall anchor (wings first) into hole. Tapanchor flush to wall.4. For thin walls (1/2" or less), insert red keyinto wall anchor. Push red key to “pop” openanchor wings. IMPORTANT: Do not hammerkey! For thick walls (over 1/2" thick) or solidwalls, do not pop open wings.5. Place mounting bracket onto wall. Line uplast hole on each end of bracket with wallanchors.6. Insert mounting screws through bracket andinto wall anchors.7. Tighten screws until mounting bracket isfirmly fastened to wall.Figure 9 - FoldingAnchorFigure 10 - PoppingOpen Anchor WingsFor Thin WallsPlacing Heater On Mounting Bracket1. Locate two horizontal slots on back panel ofheater.2. Place heater onto mounting bracket. Slidehorizontal slots onto stand-out tabs on mountingbracket.Horizontal SlotsStand-Out TabMounting Bracket(attached to wall)Figure 11 - Mounting Heater OntoMounting Bracket10www.desatech.com 114683-01B

INSTALLATIONContinuedInstalling Bottom Mounting Screws1. Locate two bottom mounting holes. Theseholes are near bottom on back panel of heater(see Figure 12).2. Mark screw locations on wall.3. Remove heater from mounting bracket.4. If installing bottom mounting screws intohollow or solid wall, install wall anchors.Follow steps 1 through 4 under Attaching ToWall Anchor Method, page 10.If installing bottom mounting screw into wallstud, drill holes at marked locations using9/64" drill bit.5. Replace heater onto mounting bracket.6. Place spacers between bottom mounting holesand wall anchor or drilled hole.7. Hold spacer in place with one hand. With otherhand, insert mounting screw through bottommounting hole and spacer. Place tip of screwin opening of wall anchor or drilled hole.8. Tighten both screws until heater is firmlysecured to wall. Do not over tighten.Note: Do not replace front panel at this time.Replace front panel after making gas connectionsand checking for leaks (see pages 12through 14).HeaterFront ViewSide ViewWallSpacerFigure 12 - Installing Bottom MountingScrews114683-01B www.desatech.com11

INSTALLATIONContinuedCONNECTING TO GAS SUPPLYWARNING: This appliancerequires a 3/8" NPT (NationalPipe Thread) inlet connection tothe pressure regulator.WARNING: A qualified serviceperson must connect heaterto gas supply. Follow all localcodes.WARNING: For natural gas,never connect heater to private (nonutility)gas wells. This gas is commonlyknown as wellhead gas.IMPORTANT: For natural gas, check gas linepressure before connecting heater to gas line. Gasline pressure must be no greater than 10.5 inches ofwater. If gas line pressure is higher, heater regulatordamage could occur.CAUTION: For propane/LPgas, never connect heater directlyto the propane/LP supply. Thisheater requires an external regulator(not supplied). Install theexternal regulator between theheater and propane/LP supply.For propane/LP gas, the installer must supply anexternal regulator. The external regulator willreduce incoming gas pressure. You must reduceincoming gas pressure to between 11 and 14 inchesof water. If you do not reduce incoming gas pressure,heater regulator damage could occur. Installthe external regulator with the vent pointing downas shown in Figure 14. Pointing the vent downprotects it from freezing rain or sleet.CAUTION: Use only new,black iron or steel pipe. Internally-tinnedcopper tubing maybe used in certain areas. Checkyour local codes. Use pipe oflarge enough diameter to allowproper gas volume to heater. Ifpipe is too small, undue loss ofvolume will occur.Typical Inlet Pipe Diameter30,000 Btu/Hr Models - 1/2" or greaterInstallation must include equipment shutoff valve,union and plugged 1/8" NPT tap. Locate NPT tapwithin reach for test gauge hook up. NPT tap mustbe upstream from heater (see Figure 15, page 13).IMPORTANT: Install an equipment shutoff valvein an accessible location. The equipment shutoffvalve is for turning on or shutting off the gas tothe appliance.Apply pipe joint sealant lightly to male NPTthreads. This will prevent excess sealant fromgoing into pipe. Excess sealant in pipe could resultin clogged heater valves.WARNING: Use pipe jointsealant that is resistant to liquidpetroleum (LP) gas.Install sediment trap in supply line as shown inFigure 15, page 13. Locate sediment trap whereit is within reach for cleaning. Locate sedimenttrap where trapped matter is not likely to freeze.A sediment trap traps moisture and contaminants.This keeps them from going into heater controls. Ifsediment trap is not installed or is installed wrong,heater may not run properly.Propane/LPSupply TankExternal RegulatorVentPointingDownFigure 14 - External Regulator With VentPointing Down12www.desatech.com 114683-01B

Sediment TrapIMPORTANT: Hold the pressure regulator withwrench when connecting it to gas piping and/orfittings. Do not over tighten pipe connection toregulator. The regulator body could be damaged.Test Gauge Connection*PressureRegulator3/8" NPTPipe NippleINSTALLATIONTee JointReducerBushing to1/8" NPT1/8" NPTPlug TapTee JointPipeNippleCapContinued WARNING: Never use anHeaterCabinetGround JointUnionEquipmentShutoffValve*3" Min.Natural GasFrom Gas Meter(4" W.C. to 10.5" W.C.Pressure)Propane/LPFrom ExternalRegulator(11" W.C. to 14" W.C.Pressure)Figure 15 - Gas Connection* A CSA design-certified equipment shutoff valvewith 1/8" NPT tap is an acceptable alternative totest gauge connection. Purchase the optional CSAdesign-certified equipment shutoff valve from yourdealer. See Accessories, page 30.CHECKING GAS CONNECTIONSWARNING: Test all gas pipingand connections, internal andexternal to unit, for leaks afterinstalling or servicing. Correctall leaks at once.open flame to check for a leak.Apply a noncorrosive leak detectionfluid to all joints. Bubblesforming show a leak. Correct allleaks at once.CAUTION: For propane/LPgas, make sure external regulatorhas been installed betweenpropane/LP supply and heater.See guidelines under Connectingto Gas Supply, page 12.PRESSURE TESTING GAS SUPPLYPIPING SYSTEMTest Pressures In Excess Of 1/2 PSIG(3.5 kPa)1. Disconnect appliance with its appliance maingas valve (control valve) and equipmentshutoff valve from gas supply piping system.Pressures in excess of 1/2 psig will damageheater regulator.2. Cap off open end of gas pipe where equipmentshutoff valve was connected.3. Pressurize supply piping system by eitheropening propane/LP supply tank valve forpropane/LP gas or opening main gas valvelocated on or near gas meter for natural gasor using compressed air.4. Check all joints of gas supply piping system.Apply a noncorrosive leak detection fluid toall joints. Bubbles forming show a leak.5. Correct all leaks at once.6. Reconnect heater and equipment shutoffvalve to gas supply. Check reconnected fittingsfor leaks.Test Pressures Equal To or Less Than1/2 PSIG (3.5 kPa)1. Close equipment shutoff valve (see Figure 16).EquipmentShutoff ValveOpenClosedFigure 16 - Equipment Shutoff Valve114683-01B www.desatech.com13

OPERATING HEATERContinued6. With control knob pressed in, push downand release ignitor button. This will lightpilot. The pilot is attached to the front ofburner. The pilot is attached to the front ofthe burner. If needed, keep pressing ignitorbutton until pilot lights.Note: If pilot does not stay lit, refer toTroubleshooting, page 20. Also contact aqualified service person or gas supplier forrepairs. Until repairs are made, light pilotwith match. To light pilot with match, seeManual Lighting Procedure.7. Keep control knob pressed in for 30 secondsafter lighting pilot. After 30 seconds, releasecontrol knob.• If control knob does not pop up whenreleased, contact a qualified service personor gas supplier for repairs.Note: If pilot goes out, repeat steps 3through 7. This heater has a safety interlocksystem. Wait one (1) minute beforelighting pilot again.8. Turn control knob counterclockwiseto desired heating level. The main burnershould light. Set control knob to any heatlevel between 1 and 5.CAUTION: Do not try to adjustheating levels by using theequipment shutoff valve.ThermocoupleIgnitor ElectrodePilot BurnerFigure 22 - Pilot (actual pilot may vary)TO TURN OFF GASTO APPLIANCEShutting Off Heater1. Turn control knob clockwise to theOFF position.2. Turn off all electric power to the applianceif service is to be performed.Shutting Off Burner Only (pilot stays lit)Turn control knob clockwise to thePILOT position.THERMOSTAT CONTROLOPERATIONThe thermostatic control used on these modelsdiffers from standard thermostats. Standardthermostats simply turn on and off the burner.The thermostat used on this heater senses theroom temperature. The thermostat adjusts theamount of gas flow to the burner. This increasesor decreases the burner flame height. At timesthe room may exceed the set temperature. If so,the burner will shut off. The burner will cycleback on when room temperature drops below theset temperature. The control knob can be set toany heat level between 1 and 5. Selecting the 5setting will cause the burner to remain fully onwithout modulating down in most cases.Note: The thermostat sensing bulb measuresthe temperature of air near the heater cabinet.This may not always agree with room temperature(depending on housing construction,installation location, room size, open air temperatures,etc.). Frequent use of your heater willlet you determine your own comfort levels.MANUAL LIGHTINGPROCEDURE1. Remove front panel (see Figure 7, page 9).2. Follow steps 1 through 5 under LightingInstructions, page 16.3. With control knob pressed in, strike match.Hold match to pilot until pilot lights.4. Keep control knob pressed in for 30 secondsafter lighting pilot. After 30 seconds, releasecontrol knob. Now follow step 8, underLighting Instructions, column 1.5. Replace front panel.114683-01B www.desatech.com17

INSPECTING HEATERCheck pilot flame pattern and burner flame patternoften.PILOT FLAME PATTERNFigure 23 shows a correct pilot flame pattern.Figure 24 shows an incorrect pilot flame pattern.The incorrect pilot flame is not touching thethermocouple. This will cause the thermocoupleto cool. When the thermocouple cools, the heaterwill shut down.If pilot flame pattern is incorrect, as shown inFigure 24• turn heater off (see To Turn Off Gas to Appliance,page 16 or 17)• see Troubleshooting, page 20Note: The pilot flame on natural gas units willhave a slight curve, but flame should be blue andhave no yellow or orange color.ThermocoupleFigure 23 - Correct Pilot Flame PatternThermocoupleBlue FlamePilot BurnerYellow FlamePilotBurnerFigure 24 - Incorrect Pilot Flame PatternBURNER FLAME PATTERNWARNING: If yellow tippingoccurs, your heater could produceincreased levels of carbonmonoxide.NOTICE: Do not mistake orangeflames with yellow tipping. Dirtor other fine particles enter theheater and burn causing briefpatches of orange flame.Figure 25 shows a correct burner flame pattern.Figure 26 shows an incorrect burner flame pattern.The incorrect burner flame pattern shows yellowtipping of the flame. It also shows the flame higherthan 1/2 the heat shield height.If burner flame pattern is incorrect, as shown inFigure 26• turn heater off (see To Turn Off Gas To Appliance,page 16 or 17)• see Troubleshooting, page 20BlueFlameHeat1/ 2 ShieldHeightFigure 25 - Correct Burner Flame PatternFigure 26 - Incorrect Burner FlamePatternYellowTippingHeat1/2 ShieldHeight18www.desatech.com 114683-01B

CLEANING ANDMAINTENANCEWARNING: Turn off heaterand let cool before cleaning.CAUTION: You must keepcontrol areas, burner and circulatingair passageways of heaterclean. Inspect these areas ofheater before each use. Haveheater inspected yearly by aqualified service person. Heatermay need more frequent cleaningdue to excessive lint fromcarpeting, bedding material, pethair, etc.WARNING: Failure to keepthe primary air opening(s) ofthe burner(s) clean may result insooting and property damage.ODS/PILOT AND BURNERUse a vacuum cleaner, pressurized air or small,soft bristled brush to clean.BURNER PILOT AIR INLETThe primary air inlet hole allows the properamount of air to mix with the gas. This provides aclean burning flame. Keep this hole clear of dust,dirt and lint. Clean this air inlet hole prior to eachheating season. A blocked air hole will create soot.We recommend that you clean the unit every threemonths during operation and have heater inspectedyearly by a qualified service person.We also recommend that you keep the burnertube and pilot assembly clean and free of dust anddirt. To clean these parts we recommend usingcompressed air no greater than 30 PSI. Your localcomputer store, hardware store or home centermay carry compressed air in a can. You can use avacuum cleaner in the blow position. If using compressedair in a can, please follow the directions onthe can. If you donʼt follow directions on the can,you could damage the pilot assembly.1. Shut off the unit, including the pilot. Allowthe unit to cool for at least thirty minutes.2. Inspect burner, pilot for dust and dirt.3. Blow air through the ports/slots and holes inthe burner.4. Never insert objects into the pilot tube.Clean the pilot assembly also. A yellow tip on thepilot flame indicates dust and dirt in the pilot assembly.There is a small pilot air inlet about twoinches from where the pilot flame comes out ofthe pilot assembly (see Figure 27). With the unitoff, lightly blow air through the air inlet. You mayblow through a drinking straw if compressed airis not available.Pilot Air InletPilot AssemblyFigure 27 - Pilot Inlet Air(Propane/LP Pilot Shown)CABINETAir PassagewaysUse a vacuum cleaner or pressurized air toclean.ExteriorUse a soft cloth dampened with a mild soap andwater mixture. Wipe the cabinet to remove dust.114683-01B www.desatech.com19

OBSERVED PROBLEMODS/pilot lights but flame goesout when control knob is releasedTROUBLESHOOTINGContinuedPOSSIBLE CAUSE1. Control knob not fully pressed in2. Control knob not pressed inlong enough3. Safety interlock system hasbeen triggered4. Equipment shutoff valve notfully open5. Thermocouple connectionloose at control valve6. Pilot flame not touching thermocouple,which allows thermocoupleto cool, causingpilot flame to go out. Thisproblem could be caused byone or both of the following:A) Low gas pressureB) Dirty or partially cloggedODS/pilot7. Thermocouple damaged8. Control valve damagedREMEDY1. Press in control knob fully2. After ODS/pilot lights, keep controlknob pressed in 30 seconds3. Wait one minute for safety interlocksystem to reset. Repeatignition operation4. Fully open equipment shutoffvalve5. Hand tighten until snug, thentighten 1/4 turn more6. A) Contact local natural orpropane/LP gas companyB) Clean ODS/pilot (seeCleaning and Maintenance,page 19) or replace ODS/pilotassembly7. Replace pilot assembly8. Replace control valveBurner does not light after ODS/pilot is litDelayed ignition of burnerBurner backfiring during combustion1. Burner orifice is clogged2. Inlet gas pressure is too low1. Manifold pressure is too low2. Burner orifice is clogged1. Burner orifice is clogged ordamaged2. Burner damaged3. Gas regulator defective1. Clean burner (see Cleaningand Maintenance, page 19)or replace burner orifice2. Contact local natural or propane/LPgas company1. Contact local natural or propane/LPgas company2. Clean burner (see Cleaningand Maintenance, page 19)or replace burner orifice1. Clean burner (see Cleaningand Maintenance, page 19)or replace burner orifice2. Replace burner3. Replace gas regulator114683-01B www.desatech.com21

TROUBLESHOOTINGContinuedWARNING: 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 yourbuilding.• Immediately call your gas supplier from a neighbor’s phone. 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.OBSERVED PROBLEMHeater produces unwantedodorsPOSSIBLE CAUSE REMEDY1. Heater burning vapors frompaint, hair spray, glues, etc.(see IMPORTANT statementabove)2. Low fuel supply (propane/LPgas only)3. Gas leak. See Warningstatement above1. Ventilate room. Stop usingodor causing products whileheater is running2. Refill supply tank3. Locate and correct all leaks(see Checking Gas Connections,page 13)Heater shuts off in use (ODSoperates)Gas odor even when control knobis in OFF position1. Not enough fresh air isavailable2. Low line pressure3. ODS/pilot i s p a r t i a l l yclogged1. Gas leak. See Warningstatement above2. Control valve defective1. Open window and/or door forventilation2. Contact local natural or propane/LPgas company3. Clean ODS/pilot (see Cleaningand Maintenance, page 19)1. Locate and correct all leaks(see Checking Gas Connections,page 13)2. Replace control valveGas odor during combustion1. Foreign matter between controlvalve and burner2. Gas leak. See Warningstatement above1. Take apart gas tubing andremove foreign matter2. Locate and correct all leaks(see Checking Gas Connections,page 13)Moisture/condensation noticedon windows1. Not enough combustion/ventilationair1. Refer to Air for Combustionand Ventilation requirements(page 5)114683-01B www.desatech.com23

SPECIFICATIONSBG30N, FG30N, GG30N, RG30N, GMG30NBG30NT, FG30NT, GG30NT, RG30NT, GMG30NTBtu (Variable) 15,000/30,000Type GasNatural OnlyIgnitionPiezoPressure Regulator Setting3" W.C.Inlet Gas Pressure (in. of water)Maximum 10.5"Minimum 4"Dimensions, Inches (H x W x D)Heater 24 1 /4 x 25 3 /4 x 7Carton 26 3 /8 x 28 1 /8 x 10Weight (pounds)Heater 28Shipping 33BG30P, FG30P, GG30P, RG30P, GMG30PBG30PT, FG30PT, GG30PT, RG30PT, GMG30PTBtu (Variable) 15,000/30,000Type GasPropane/LP OnlyIgnitionPiezoPressure Regulator Setting8" W.C.Inlet Gas Pressure (in. of water)Maximum 14"Minimum 11"Dimensions, Inches (H x W x D)Heater (Includes knobs & grill) 24 1 /4 x 25 3 /4 x 7Carton 26 3 /8 x 28 1 /8 x 10Weight (pounds)Heater 28Shipping 3324www.desatech.com 114683-01B

SERVICE HINTSWhen Gas Pressure Is Too Low• pilot will not stay lit• burner will have delayed ignition• heater will not produce specified heat• propane/LP gas supply may be lowYou may feel your gas pressure is too low. Ifso, contact your local natural or propane/LPgas supplier.TECHNICAL SERVICEYou may have further questions about installation,operation or troubleshooting. If so, contact DESAHeating Productsʼ Technical Service Departmentat 1-866-672-6040. When calling please have yourmodel and serial numbers of your heater ready.You can also visit DESA Heating Productsʼ technicalservice web site at www.desatech.com.SERVICE PUBLICATIONSYou can purchase a service manual from the addresslisted on the back page of this manual. Send a checkfor $5.00 payable to DESA Heating ProductsREPLACEMENT PARTSNote: Use only original replacement parts. Thiswill protect your warranty coverage for partsreplaced under warranty.PARTS UNDER WARRANTYContact authorized dealers of this product. Ifthey canʼt supply original replacement part(s),call DESA Heating Productsʼ Technical ServiceDepartment at 1-866-672-6040.When calling DESA Heating Products, haveready• 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 dateUsually, we will ask you to return the part to thefactory.PARTS NOT UNDER WARRANTYContact authorized dealers of this product. If theycanʼt supply original replacement part(s), eithercontact your nearest Parts Central (see page 31)or call DESA Heating Products at 1-866-672-6040for referral information.When calling DESA Heating Products, haveready• model number of your heater• the replacement part number114683-01B www.desatech.com25

ILLUSTRATED PARTS BREAKDOWNMODELSBG30N, BG30P, FG30N, FG30P,GG30N, GG30P, RG30N, RG30P,GMG30N, GMG30P715201421591217139111014181983616226www.desatech.com 114683-01B

PARTS LISTThis list contains replaceable parts used in your heater. When ordering parts, follow the instructionslisted under Replacement Parts on page 25 of this manual.PART NUMBERBG30N BG30PKEY FG30N FG30P RG30N RG30PNO. GG30N GG30P GMG30N GMG30P DESCRIPTION QTY.1 097159-04 097159-04 097159-04 097159-04 Piezo Ignitor 12 107676-01 107676-01 107676-01 107676-01 Front Panel 13 103476-02 103476-02 103476-02 103476-02 Grill Guard 14 110038-05 110038-06 110038-05 110038-06 Control Valve 15 098508-01 098508-01 098508-01 098508-01 Valve Retainer Nut 16 104658-01 104658-01 104658-01 104658-01 Heat Shield 17 ** ** ** ** Cabinet 18 107894-11 107894-11 107894-11 107894-11 Deflector Assembly 19 098271-09 098271-09 098271-09 098271-09 Ignitor Cable 110 098249-01 098249-01 098249-01 098249-01 Nut 211 110803-01 110803-02 110803-01 110803-02 ODS/Pilot Assembly 1110186-01 110186-01 110186-01 110186-01 Thermocouple Kit 112 103447-01 103447-01 103447-01 103447-01 Burner 113 099387-05 099387-05 099387-05 099387-05 Pilot Tubing 114 103845-08 103845-07 103845-08 103845-07 Injector 115 099066-02 099066-02 099066-02 099066-02 Mounting Bracket 116 099415-17 099415-18 099415-17 099415-18 Gas Regulator 117 NJF 8C NJF 8C NJF 8C NJF 8C Hex Nut 118 103570-04 103570-04 103570-04 103570-04 Outlet Tubing 119 103572-03 103572-03 103572-03 103572-03 Inlet Tubing 120 109303-03 109303-03 109303-03 109303-03 Baffle 121 098354-02 098354-02 098354-02 098354-02 Control Knob 1PARTS AVAILABLE — NOT SHOWN100642-03 100642-03 100642-03 100642-03 Hardware Assembly 1105345-01 105345-01 105345-01 105345-01 Cable Tie 1107888-01 107888-01 107888-01 107888-01 Control Position Label 1111051-01 111051-01 111051-01 111051-01 Lighting Instruction Label 1** Not a field replaceable part.114683-01B www.desatech.com27

ILLUSTRATED PARTS BREAKDOWNMODELSBG30NT, BG30PT, FG30NT, FG30PT,GG30NT, GG30PT, RG30NT, RG30PT,GMG30NT, GMG30PT715514101217139111014181983616228www.desatech.com 114683-01B

PARTS LISTThis list contains replaceable parts used in your heater. When ordering parts, follow the instructionslisted under Replacement Parts on page 25 of this manual.PART NUMBERBG30NT BG30PTKEY FG30NT FG30PT RG30NT RG30PTNO. GG30NT GG30PT GMG30NT GMG30PT DESCRIPTION QTY.1 097159-04 097159-04 097159-04 097159-04 Piezo Ignitor 12 107676-01 107676-01 107676-01 107676-01 Front Panel 13 103476-02 103476-02 103476-02 103476-02 Grill Guard 14 098522-12 098522-13 098522-12 098522-13 Thermostat Gas Valve 15 109303-03 109303-03 109303-03 109303-03 Baffle 16 104658-01 104658-01 104658-01 104658-01 Heat Shield 17 ** ** ** ** Cabinet 18 107894-11 107894-11 107894-11 107894-11 Deflector Assembly 19 098271-09 098271-09 098271-09 098271-09 Ignitor Cable 110 098249-01 098249-01 098249-01 098249-01 Nut 211 110803-01 110803-02 110803-01 110803-02 ODS/Pilot Assembly 1110186-01 110186-01 110186-01 110186-01 Thermocouple Kit 112 103447-01 103447-01 103447-01 103447-01 Burner 113 099387-03 099387-03 099387-03 099387-03 Pilot Tubing 114 103845-08 103845-07 103845-08 103845-07 Injector 115 099066-02 099066-02 099066-02 099066-02 Mounting Bracket 116 099415-17 099415-18 099415-17 099415-18 Gas Regulator 117 NJF 8C NJF 8C NJF 8C NJF 8C Hex Nut 118 103255-02 103255-02 103255-02 103255-02 Outlet Tubing 119 103256-02 103256-02 103256-02 103256-02 Inlet Tubing 1PARTS AVAILABLE — NOT SHOWN100642-03 100642-03 100642-03 100642-03 Hardware Assembly 1107888-01 107888-01 107888-01 107888-01 Control Position Label 1111051-01 111051-01 111051-01 111051-01 Lighting Instruction Label 1** Not a field replaceable part.114683-01B www.desatech.com29

ACCESSORIESPurchase these heater accessories from your localdealer. If they can not supply these accessories, eithercontact your nearest Parts Central (see page 31) orcall DESA Heating Products at 1-866-672-6040for referral information. You can also write to theaddress listed on the back page of this manual.EQUIPMENT SHUTOFF VALVEGA5010For all models. Equipment shutoff valve with1/8" NPT tap.FAN KITS - GA3250TFor all models. Provides better heat distribution.Makes heater more efficient. Complete installationand operating instructions included.Thermostatically-controlled, blower turns itself onand off as required.ELECTRONIC IGNITOR KIT - GA435Not ShownFor all piezo ignitor models. Provides easierlighting of the pilot.30www.desatech.com 114683-01B

PARTS CENTRALSThese Parts Centrals are privately owned businesses. They have agreed to support our customerʼs needsby providing original replacement parts and accessories.Tool & Equipment, Co.5 Manila AveHamden, CT 06514-03221-800-397-7553203-248-7553Parts DepartmentPortable Heater Parts342 N. County Rd. 400 EastValparaiso, IN 46383-9704All States219-462-74411-888-619-7060sales@portableheaterparts.comtechservice@portableheaterparts.comFBD1349 Adams StreetBowling Green, KY 42103-3414270-846-11991-800-654-8534Fax: 1-800-846-0090franktalk@aol.comMaster Parts Dist.1251 Mound Ave. NWGrand Rapids, MI 49504-2672616-791-05051-800-446-1446Fax: 616-791-8270www.nbmc.comWasher Equipment Co.1715 Main StreetKansas City, MO 64108-2195KS, MO, AR816-842-3911www.washerparts.comEast Coast Energy Products707 BroadwayW. Long Branch, NJ 07764-1542732-870-88091-800-755-8809www.njplaza.com/ecep21st Century2950 Fretz Valley RoadPerkasie, PA 18944-4034215-795-0400800-325-4828Laporte’s Parts & Service2444 N. 5th StreetHartsville, SC 29550-7704843-332-0191Parts DepartmentCans Unlimited, Inc.P.O. Box 645Taylor, SC 29687-0013All States803-879-30091-800-845-5301cuisales@aol.com114683-01B www.desatech.com31

WARRANTY INFORMATIONKEEP THIS WARRANTYModel ____________________________________Serial No. __________________________________Date of Purchase ____________________________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 ourstandard written warranty. We make no other warranty, expressed or implied.LIMITED WARRANTYVENT-FREE RESIDENTIAL GAS HEATERSDESA Heating Products warrants this product to be free from defects in materials and components for two(2) years from the date of first purchase, provided that the product has been properly installed, operated andmaintained in accordance with all applicable instructions. To make a claim under this warranty the Bill of Saleor cancelled check must be presented.This warranty is extended only to the original retail purchaser. This warranty covers the cost of part(s) requiredto restore this heater to proper operating condition and an allowance for labor when provided by a DESA HeatingProducts Authorized Service Center. Warranty part(s) MUST be obtained through authorized dealers ofthis product and/or DESA Heating Products who will provide original factory replacement parts. Failure to useoriginal factory replacement parts voids this warranty. The heater MUST be installed by a qualified installer inaccordance 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 partsthat fail or become damaged as a result of misuse, accidents, lack of proper maintenance or defects caused byimproper installation. Travel, diagnostic cost, labor, transportation and any and all such other costs related torepairing a defective heater will be the responsibility of the owner.TO THE FULL EXTENT ALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALEOF THE PRODUCT; THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSEDWARRANTIES AND LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES, INCLUD-ING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE TO TWO(2) YEARS ON ALL COMPONENTS FROM THE DATE OF FIRST PURCHASE; AND DESA HEATINGPRODUCTSʼ LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF THE PRODUCT ANDDESA HEATING PRODUCTS SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVERINCLUDING INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES.Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation ofincidental or consequential damages, so the above limitation on implied warranties, or exclusion or limitationon 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 42102-9004www.desatech.com114683 01NOT A UPC114683-01Rev. B07/04