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Desa GWN30T User's Manual

1. Mounting Base Feet to Heater 1 S y Sheet Metal Screw Lay heater cabinet on its back on a table with the heater bottom overhanging the table edge Align holes in base foot with mounting holes on bottom of cabinet see Figure 13 Secure base foot to heater using sheet metal screws Repeat for other side Wood Screw Base Foot Figure 13 Installing Base Feet Mounting Base Feet to Floor Where required by local code 1 Remove front panel see Removing Front Panel of Heater page 9 Position heater with base feet in desired loca tion Mark holes for drilling Remove heater with base For carpeted floors make a small cut with a sharp knife at marked locations prior to drill ing If mounting base to a wood floor drill 1 8 inch diameter hole 3 4 inch deep Do not use anchors in wood floors If mounting base to a concrete floor drill with 1 4 inch diameter concrete drill bit 13 8 inches into floor Insert anchors completely into holes Reposition heater with base feet over holes Secure base to floor with wood screws See Figure 13 107884 01H www desatech com 11 INSTALLATION Continued CONNECTING TO GAS SUPPLY A WARNING This appliance requires a 3 8 NPT National Pipe Thread inlet connection to the pressure regulator AX WARNING A qualified ser vice person must connect heater to gas supply Follow all local codes Ay WARNING For natural
2. gen Depletion Sensing ODS safety shutoff system The ODS shuts down the heater if not enough fresh airis available See Air for Com bustion and Ventilation pages 5 through 7 107884 01H www desatech com 3 SAFETY INFORMATION Continued 6 Keep all air openings in front and bottom of heater clear and free of debris This will in sure enough air for proper combustion 7 Tf heater shuts off do not relight until you pro vide fresh outside air If heater keeps shut ting off have it serviced 8 Do not run heater e where flammable liquids or vapors are used or stored e under dusty conditions 9 Before using furniture polish wax carpet cleaner or similar products turn heater off If heated the vapors from these products may create a white powder residue within burner box or on adjacent walls or furniture 10 Do not use heater if any part has been under water Immediately call a qualified service technician to inspect the room heater and to replace any part of the control system and any gas control which has been under water 11 Turn off and let cool before servicing Only a qualified service person should service and repair heater 12 Operating heater above elevations of 4 500 feet could cause pilot outage 13 To prevent performance problems do not use propane LP fuel tank of less than 100 lbs capacity 14 Provide adequate clearances around air openings LOCAL CODES Install and use heater wit
3. 3 Tee Joint Union Reducer Equipment Bushing to Shutoff o 7 1 8 NPT Valve 3 1 8 NPT E Plug Tap Tee e Pipe Nipple Natural Gas Cap From Gas Meter 4 W C to 10 5 W C Pressure Propane LP From External Regulator 11 W C to 14 W C Pressure Sediment Trap Figure 15 Gas Connection A CSA design certified equipment shutoff valve with 1 8 NPT tap is an acceptable alternative to test gauge connection Purchase the optional CSA design certified equipment shutoff valve from your dealer See Accessories page 30 CHECKING GAS CONNECTIONS A WARNING Test all gas pip ing and connections internal and external to unit for leaks after installing or servicing Cor rect all leaks at once AX WARNING Never use an open flame to check for a leak Apply a noncorrosive leak de tection fluid to all joints Bubbles forming show a leak Correct all leaks at once A CAUTION For propane LP gas make sure external regula tor has been installed between propane LP supply and heater See guidelines under Connect ing to Gas Supply page 12 Pressure Testing Gas Supply Piping System Test Pressures In Excess Of 1 2 PSIG 3 5 kPa 1 Disconnect appliance with its appliance main gas valve control valve and equipment shutoff valve from gas supply piping system Pressures in excess of 1 2 psig will damage heater regulator Cap off open end of gas pipe where equip ment
4. 098522 11 098522 13 Thermostat Gas Valve Propane LP 104189 01 104189 02 Bottom Glass Retainer 098260 09 098260 10 Glass 104658 01 Heat Shield si an Cabinet 107894 11 107894 10 107894 11 Deflector Assembly 098271 09 098271 09 098271 09 Ignitor Cable 098249 01 098249 01 098249 01 Nut 110803 01 110803 01 110803 01 ODS Pilot Assembly Natural 110803 02 110803 02 110803 02 ODS Pilot Assembly Propane LP 110186 01 110186 01 110186 01 Thermocouple Kit 103447 01 103446 01 103447 01 Burner 099387 03 099387 03 099387 03 Pilot Tubing 103845 08 103845 06 103845 08 Injector Natural 103845 07 103845 05 103845 07 Injector Propane LP 099066 02 099066 02 099066 02 Mounting Bracket 099415 17 099415 17 099415 17 Gas Regulator Natural 099415 18 099415 18 099415 18 Gas Regulator Propane LP NJF 8C NJF 8C NJF 8C Hex Nut 103255 02 103255 02 103255 02 Outlet Tubing 103256 02 103256 02 103256 02 Inlet Tubing 109303 03 109303 04 109303 03 Baffle PARTS AVAILABLE NOT SHOWN 100642 03 100642 03 100642 03 Hardware Assembly 107888 01 107888 01 107888 01 Control Position Label 111051 01 111051 01 111051 01 Lighting Instruction Label Not a field replaceable part A A SS tee A SS ek ae IN See Se ee Se oe Seek ee eS 107884 01H www desatech com 29 ACCESSORIES Purchase these heater accessor
5. gas never connect heater to private non utility gas wells This gas is commonly knownas wellhead gas IMPORTANT For natural gas check gas line pressure before connecting heater to gas line Gas line pressure must be no greater than 14 inches of water If gas line pressure is higher heater regula tor damage could occur A CAUTION For propane LP gas neverconnectheater directly to the propane LP supply This heater requires an external regu lator not supplied Install the external regulator between the heater and propane LP supply For propane LP gas the installer must supply an external regulator The external regulator will re duce incoming gas pressure You must reduce in coming gas pressure to between 11 and 14 inches of water If you do not reduce incoming gas pres sure heater regulator damage could occur Install the external regulator with the vent pointing down as shown in Figure 14 Pointing the vent down protects it from freezing rain or sleet A CAUTION Use only new black iron or steel pipe Inter nally tinned copper tubing may be used in certain areas Check your local codes Use pipe of large enough diameter to allow proper gas volume to heater If pipe is too small undue loss of volume will occur Typical Inlet Pipe Diameters 20 000 Btu Hr Models 3 8 or greater 30 000 Btu Hr Models 1 2 or greater Installation must include equipment shutoff valve union a
6. incorrect as shown in Figure 26 turn heater off see To Turn Off Gas To Appli ance page 16 or 17 see Troubleshooting pages 20 through 43 Blue Flame MI MMMM A A pease ey 2 Glass i Height Figure 25 Correct Burner Flame Pattern Yellow Tipping ho Glass Height Figure 26 Incorrect Burner Flame Pattern 18 www desatech com 107884 01H CLEANING AND MAINTENANCE A WARNING Turn off heater and let cool before cleaning A CAUTION You must keep control areas burner and cir culating air passageways of heater clean Inspect these ar eas of heater before each use Have heater inspected yearly by a qualified service person Heater may need more frequent cleaning due to excessive lint from carpeting bedding mate rial pet hair etc Ay WARNING Failure to keep the primary air opening s of the burner s clean may result in sooting and property damage ODS PILOT AND BURNER Use a vacuum cleaner pressurized air or small soft bristled brush to clean BURNER PILOT AIR INLET The primary air inlet holes allow the proper amount of air to mix with the gas This provides a clean burning flame Keep these holes clear of dust dirt and lint Clean these air inlet holes prior to each heating season Blocked air holes will create soot We recommend that you clean the unit every three months during operation and have heater i
7. information When calling DESA Heating Products have ready model number of your heater the replacement part number 107884 01H www desatech com 25 ILLUSTRATED PARTS BREAKDOWN MODELS GN30 GP30 GWN20 GWP20 WMN20 WMP20 107884 01H www desatech com 26 PARTS LIST This list contains replaceable parts used in your heater When ordering parts follow the instructions listed under Replacement Parts on page 25 of this manual PART NUMBER FOR DESCRIPTION 097159 04 097159 04 097159 04 097159 04 Piezo Ignitor 107676 01 107676 01 107673 01 107673 01 Front Panel 103476 02 103476 02 103476 01 103476 01 Grill Guard 110038 05 110038 06 110038 07 110038 08 Control Valve 104189 01 104189 01 Bottom Glass Retainer 098260 09 098260 09 Glass 104658 01 104658 01 Heat Shield x x wx Cabinet 107894 11 107894 11 107894 10 107894 10 Deflector Assembly 098271 09 098271 09 098271 09 098271 09 Ignitor Cable 098249 01 098249 01 098249 01 098249 01 Nut 110803 01 110803 02 110803 01 110803 02 ODS Pilot Assembly 110186 01 110186 01 110186 01 110186 01 Thermocouple Kit 103447 01 103447 01 103446 01 103446 01 Burner 099387 05 099387 05 099387 05 099387 05 Pilot Tubing 103845 08 103845 07 103845 06 103845 05 Injector 099066 02 099066 02 099066 02 099066 02 Mounting Bracket 099415 17
8. tick ing noise just after burner is lit or shut off 1 Metal expanding while heat ing or contracting while cooling 1 This is common with most heat ers If noise is excessive con tact qualified service person Heater produces unwanted odors 1 Heater burning vapors from paint hair spray glues etc see IMPORTANT statement above 2 Low fuel supply propane LP gas only 3 Gas leak See Warning statement above 1 Ventilate room Stop using odor causing products while heater is running 2 Refill supply tank 3 Locate and correct all leaks see Checking Gas Connec tions pages 13 and 14 Heater shuts off in use ODS op erates 3 ODS pilot is 1 Not enough fresh airis avail able 2 Low line pressure partially clogged 1 Open window and or door for ventilation 2 Contact local natural or pro pane LP gas company 3 Clean ODS pilot see Cleaning and Maintenance page 19 Gas odor even when control knob is in OFF position 1 Gas leak See Warning statement above 2 Control valve defective 1 Locate and correct all leaks see Checking Gas Connec tions pages 13 and 14 2 Replace control valve Gas odor during combustion 1 Foreign matter between con trol valve and burner 2 Gas leak See Warning statement above 1 Take apart gas tubing and re move foreign matter 2 Locate and correct all leaks see Checking Gas Connec tions pages 13 and 14 Mo
9. tight con struction unless provisions are provided for adequate combus tion and ventilation air Read the following instructions to in sure proper fresh air for this and other fuel burning appli ances in your home Today s homes are built more energy efficient than ever New materials increased insulation and new construction methods help reduce heat loss in homes Home owners weather strip and caulk around windows and doors to keep the cold air out and the warm air in During heating months home owners want their homes as airtight as possible While it is good to make your home energy effi cient your home needs to breathe Fresh air must enter your home All fuel burning appliances need fresh air for proper combustion and ventilation Exhaust fans fireplaces clothes dryers and fuel burning appliances draw air from the house to operate You must provide adequate fresh air for these appliances This will insure proper venting of vented fuel burning appliances PROVIDING ADEQUATE VENTILATION The following are excerpts from National Fuel Gas Code ANSI Z223 1 NFPA 54 Section 5 3 Air for Combustion and Ventilation All spaces in homes fall into one of the three fol lowing ventilation classifications 1 Unusually Tight Construction 2 Unconfined Space 3 Confined Space The information on pages 4 through 6 will help you classify your space and provide adequate ventilation Unusually Tight Construction The air that l
10. 0 Btu Hr Total 60 000 Btu Hr A WARNING If the area in which the heater may be oper ated is smaller than that defined as an unconfined space or if the building is of unusually tight construction provide adequate combustion and ventilation air by one of the methods described in the National Fuel Gas Code ANSI Z223 1 NFPA 54 Section 5 3 or applicable local codes 107884 01H AIR FOR COMBUSTION AND VENTILATION Continued VENTILATION AIR Ventilation Air From Inside Building This fresh air would come from an adjoining un confined space When ventilating to an adjoining unconfined space you must provide two perma nent openings one within 12 of the ceiling and one within 12 of the floor on the wall connecting the two spaces see options 1 and 2 Figure 2 You can also remove door into adjoining room see option 3 Figure 2 Follow the National Fuel Gas Code ANSI Z223 1 NFPA 54 Section 5 3 Air for Combustion and Ventilation for required size of ventilation grills or ducts Ventilation Air From Outdoors Provide extra fresh air by using ventilation grills or ducts You must provide two permanent open ings one within 12 of the ceiling and one within 12 of the floor Connect these items directly to the outdoors or spaces open to the outdoors These spaces include attics and crawl spaces Follow the National Fuel Gas Code ANSI Z223 1 NFPA 54 Section 5 3 Air for Combustion and Ventilation for required siz
11. 099415 18 099415 17 099415 18 Gas Regulator NJF 8C NJF 8C NJF 8C NJF 8C Hex Nut 103570 04 103570 04 103570 04 103570 04 Outlet Tubing 103572 03 103572 03 103572 03 103572 03 Inlet Tubing 109303 03 109303 03 109303 04 109303 04 Baffle 098354 02 098354 02 098354 02 098354 02 Control Knob 098508 01 098508 01 098508 01 098508 01 Valve Retainer Nut PARTS AVAILABLE NOT SHOWN 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 100642 03 100642 03 100642 03 100642 03 Hardware Assembly 105345 01 105345 01 105345 01 105345 01 Cable Tie 107888 01 107888 01 107888 01 107888 01 Control Position Label 111051 01 111051 01 111051 01 111051 01 Lighting Instruction Label Not a field replaceable part 107884 01H www desatech com 27 ILLUSTRATED PARTS BREAKDOWN MODELS GN30T GP30T GWN20T GWP20T GWN30T GWP30T 107884 01H www desatech com 28 PARTS LIST This list contains replaceable parts used in your heater When ordering parts follow the instructions listed under Replacement Parts on page 25 of this manual PART NUMBER FOR KEY GN30T GWN20T GWN30T GWP20T GWP30T DESCRIPTION 097159 04 097159 04 097159 04 Piezo Ignitor 107676 01 107673 01 107676 01 Front Panel 103476 02 103476 01 103476 02 Grill Guard 098522 12 098522 28 098522 12 Thermostat Gas Valve Natural 098522 13
12. 884 01H www desatech com 17 INPECTING HEATER Check pilot flame pattern and burner flame pat tern often PILOT FLAME PATTERN Figure 23 shows a correct pilot flame pattern Fig ure 24 shows an incorrect pilot flame pattern The incorrect pilot flame is not touching the thermo couple This will cause the thermocouple to cool When the thermocouple cools the heater will shut down Tf pilot flame pattern is incorrect as shown in Fig ure 24 turn heater off see To Turn Off Gas to Appli ance page 16 or 17 see Troubleshooting pages 20 through 24 Note The pilot flame on natural gas units will have a slight curve but flame should be blue and have no yellow or orange color Thermocouple 3 Blue Flame Pilot Burner Figure 23 Correct Pilot Flame Pattern Thermocouple Yellow Flame Pilot lt Burner Figure 24 Incorrect Pilot Flame Pattern BURNER FLAME PATTERN A WARNING If yellow tipping occurs your heater could pro duce increased levels of carbon monoxide NOTICE Do not mistake orange flames with yellow tipping Dirt or other fine particles enter the heater and burn causing brief patches of orange flame Figure 25 shows a correct burner flame pattern Figure 26 shows an incorrect burner flame pat tern The incorrect burner flame pattern shows yellow tipping of the flame It also shows the flame higher than 1 2 the glass panel height If burner flame pattern is
13. DESA HEATING PRODUCTS UNVENTED VENT FREE BLUE FLAME GAS HEATER SAFETY INFORMATION AND INSTALLATION MANUAL TOL We recommend that our A KA products be installed and fe 3 serviced by professionals who E 13 are certified in the U S by NFI 4 m i National Fireplace Institute NsTiTUse i 3 p Sci Cau vwww nficertified org GN30 GP30 GN30T GP30T GWN20 GWP20 GWN20T GWP20T GWN30T GWP30T WMN20 WMP20 WARNING If the information in this manual is not followed exactly a fire or explosion may result causing property damage personal injury or loss of life Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electrical switch do not use any phone in your building Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions Ifyou cannot reach your gas supplier call the fire department Installation and service must be performed by a qualified installer service agency or the gas supplier Save this manual for future reference For more information visit www desatech com WARNING Improper installation adjustment altera tion service or maintenance can cause injury or prop erty damage Referto this manual for correctinstallation and operational procedures For assistance or addi t
14. ING A WARNING Turn off and unplug heater and let cool before servic ing Only a qualified service person should service and repair heater A CAUTION Never use a wire needle or similar object to clean ODS pilot This can damage ODS pilot unit Note All troubleshooting items are listed in order of operation OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignitor button is pressed there is no spark at ODS pilot 1 Ignitor electrode positioned wrong 2 Ignitor electrode broken 3 Ignitor electrode not con nected to ignitor cable 4 Ignitor cable pinched or wet 5 Broken ignitor cable 6 Bad piezo ignitor 1 2 3 un Replace pilot assembly Replace pilot assembly Reconnect ignitor cable Free ignitor cable if pinched by any metal or tubing Keep ignitor cable dry Replace ignitor cable Replace piezo ignitor When ignitor button is pressed there is spark at ODS pilot but no ignition 1 Gas supply turned off or equip ment shutoff valve closed 2 Control knob not in PILOT position 3 Control knob not pressed in while in PILOT position 4 Air in gas lines when installed 5 Depleted gas supply pro pane LP gas only 6 ODS pilot is clogged 7 Gas regulator setting is not correct Turn on gas supply or open equipment shutoff valve Turn control knob to PILOT position Press in control knob while in PILOT position Continue holding do
15. ND DESA HEATING PRODUCTS SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHAT SOEVER INCLUDING INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation of incidental or consequential damages so the above limitation on implied warranties or exclusion or limitation on damages may not apply to you This warranty gives you specific legal rights and you may also have other rights that vary from state to state For information about this warranty write DESA HEATING PRODUCTS 2701 Industrial Drive P O Box 90004 Bowling Green KY 42102 9004 www desatech com I Il 107884 01 107884 01 Rev H NOT A UPC 03 04
16. Tile Or Other i Combustible Material FLOR Figure 4 Mounting Clearances As Viewed From Front of Heater 8 www desatech com 107884 01H INSTALLATION Continued THERMOSTAT SENSING BULB Thermostat Models Only The thermostat sensing bulb has been placed be low the heater 1 Place clamp on thermostat sensing bulb as shown in Figure 5 Clamp is provided in hard ware package 2 Snap clamp into upper mounting hole as shown in Figure 5 Mounting hole is located on lower left edge on back of heater Make sure the ther mostat sensing bulb is pointing up A Thermostat Sensing Bulb Figure 5 Attaching Thermostat Sensing Bulb INSTALLING HEATER TO WALL Mounting Bracket Locate mounting bracket in heater carton Remove mounting bracket from heater carton Figure 6 Mounting Bracket Removing Front Panel Of Heater 1 Remove the four painted screws two on each side of front panel 2 Pull bottom of front panel forward then out 3 Remove any remaining packaging materials Figure 7 Removing Front Panel Of Heater Methods For Attaching Mounting Bracket To Wall Only use last hole on each end of mounting bracket to attach bracket to wall These two holes are 14 inches apart from their centers Attach mounting bracket to wall in one of two ways 1 Attaching to wall stud 2 Attaching to wall anchor Attaching to Wall Stud This method prov
17. Wall Stud Method For attaching mounting bracket to wall studs Attaching To Wall Anchor Method For attaching mounting bracket to hollow walls wall areas between studs or solid walls concrete or masonry 1 Drill holes at marked locations using 5 16 drill bit For solid walls concrete or masonry drill at least 1 deep Fold wall anchor as shown in Figure 9 Insert wall anchor wings first into hole Tap anchor flush to wall For thin walls 1 2 or less insert red key into wall anchor Push red key to pop open anchor wings IMPORTANT Do not hammer key For thick walls over 1 2 thick or solid walls do not pop open wings Place mounting bracket onto wall Line up last hole on each end of bracket with wall anchors Insert mounting screws through bracket and into wall anchors Tighten screws until mounting bracket is firmly fastened to wall SSA S YY SN SA Figure 9 Folding Figure 10 Popping Anchor Open Anchor Wings For Thin Walls Placing Heater On Mounting Bracket 1 Locate two horizontal slots on back panel of heater Place heater onto mounting bracket Slide horizontal slots onto stand out tabs on mount ing bracket Horizontal Slots 1 Drill holes at marked locations using 9 64 drill bit 2 Place mounting bracket onto wall Line up last hole on each end of bracket with holes drilled iti wall l Mounting Bracket 3 Insert mounting screws through bracket and attache
18. act local natural or propane LP gas company B Clean ODS pilot see Cleaning and Maintenance page 19 or replace ODS pilot assembly Replace pilot assembly Replace control valve Clean burner see Cleaning and Maintenance page 19 or replace burner orifice Contact local natural or pro pane LP gas company Contact local natural or pro pane LP gas company Clean burner see Cleaning and Maintenance page 19 or replace burner orifice Burner backfiring during com bustion Burner orifice is clogged or damaged Burner damaged Gas regulator defective Clean burner see Cleaning and Maintenance page 19 or replace burner orifice Replace burner Replace gas regulator 107884 01H www desatech com 21 TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Yellow flame during burnercom 1 Not enough air 1 Check burner for dirt and de bustion Gas regulator defective Clogged or dirty burner bris If found clean burner see Cleaning and Mainte nance page 19 Replace gas regulator Clean burner see Cleaning and Maintenance page 19 Slight smoke or odor during ini tial operation Heater produces a whistling noise when burner is lit Residues from manufactur ing processes Turning control knob to 5 po sition when burner is cold Air in gas line Air passageways on heater blocked Dirty or partially clogged bur
19. avier than Tr Dev o ope 20 through 23 Also air and will settle on the floor con ES E queno il personor e supplier for repairs Until repairs are made WAAL TODO ve YoU SMELI CAS light pilot with match To light pilot with Do not try to light any appliance match see Manual Lighting Procedure e Do not touch any electric switch do not page 16 ae any phone in your building Keep control knob pressed in for 30 sec k Immediately call your gas supplier from onds after lighting pilot After 30 seconds a eda a re Follow the gas release control knob PR UCI A Note If pilot goes out repeat steps 3 e If you cannot reach your gas supplier call through 7 the fire department p Press in and turn control knob counter C Use only your hand to push in or turn the clockwise to the HIGH position Set gas control knob Never use tools If the control knob to desired heat e knob will not push in or turn by hand don t E try to repair it call a qualified service tech E y nician or gas supplier Force or attempted A CAUTION Do not try to ad repair may result in a fire or explosion just heating levels by using the D Donot use this appliance if any part has been equipment shutoff valve Press in control knob and turn counter clockwise 42 gt to the PILOT position Keep control knob pressed in for five 5 seconds see Figure 19 Note You may be running this heater for the first time after hooking up to gas sup ply If so th
20. carefully and completely before trying to assemble oper ate or service this heater Im proper use of this heater can cause serious injury or death from burns fire explosion elec trical shock and carbon mon oxide poisoning A DANGER Carbon monoxide poisoning may lead to death Carbon Monoxide Poisoning Early signs of car bon monoxide poisoning resemble the flu with headaches dizziness or nausea If you have these signs the heater may not be working properly Get fresh air at once Have heater serviced Some people are more affected by carbon monoxide than others These include pregnant women people with heart or lung disease or anemia those under the influence of alcohol and those at high altitudes Natural and Propane LP Gas Natural and pro pane LP gases are fuel gases Fuel gases are odor less An odor making agent are added to fuel gases The odor helps you detect a fuel gas leak How ever the odor added to fuel gas can fade Fuel gas may be present even though no odor exists Make certain you read and understand all warn ings Keep this manual for reference It is your guide to safe and proper operation of this heater Ay WARNING Any change to this heater or its controls can be dangerous Ay WARNING Do not use a blower insert heat exchanger insert or other accessory not approved for use with this heater Due to high temperatures the appliance should be located out
21. ce 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 maxi mum Btu Hr the space can support You must pro vide additional fresh air Your options are as follows A B C Rework worksheet adding the space of an ad joining room If the extra space provides an un confined space remove door to adjoining room or add ventilation grills between rooms See Ven tilation Air From Inside Building page 7 Vent room directly to the outdoors See Ventila tion Air From Outdoors page 7 Install a lower Btu Hr heater if lower Btu Hr size makes room unconfined If the actual Btu Hr used is less than the maximum Btu Hr the space can support the space is an unconfined space You will need no additional fresh air ventilation volume of space x 20 Maximum Btu 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 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 www desatech com Do not include direct vent gas appliances Di rect vent draws combustion air from the outdoors and vents to the outdoors Example Gas water heater 40 000 Btu Hr Vent free heater _ 20 00
22. d to wall into wall studs y 4 Tighten screws until mounting bracket is Figure 11 Mounting Heater Onto firmly fastened to wall studs Mounting Bracket 10 www desatech com 107884 01H INSTALLATION Continued Installing Bottom Mounting Screws 1 be Locate two bottom mounting holes These holes are near bottom on back panel of heater see Figure 12 Mark screw locations on wall Remove heater from mounting bracket If installing bottom mounting screws into hol low or solid wall install wall anchors Fol low steps through 4 under Attaching To Wall Anchor Method page 10 If installing bottom mounting screw into wall stud drill holes at marked locations using 9 64 drill bit Replace heater onto mounting bracket Place spacers between bottom mounting holes and wall anchor or drilled hole Hold spacer in place with one hand With other hand insert mounting screw through bottom mounting hole and spacer Place tip of screw in opening of wall anchor or drilled hole Tighten both screws until heater is firmly se cured to wall Do not over tighten Note Do not replace front panel at this time Replace front panel after making gas con nections and checking for leaks see pages 12 through 14 P Front View Heater ND x AE E 3 Spacer Wall Side View Figure 12 Installing Bottom Mounting Screws MOUNTING HEATER TO FLOOR WITH OPTIONAL FLOOR KIT
23. ded only to the original retail purchaser This warranty covers the cost of part s required to restore this heater to proper operating condition and an allowance for labor when provided by a DESA Heating Products Authorized Service Center Warranty part s MUST be obtained through authorized dealers of this product and or DESA Heating Products who will provide original factory replacement parts Failure to use original factory replacement parts voids this warranty The heater MUST be installed by a qualified in staller in accordance with all local codes and instructions furnished with the unit This warranty does not apply to parts that are not in original condition because of normal wear and tear or parts that fail or become damaged as a result of misuse accidents lack of proper maintenance or defects caused by improper installation Travel diagnostic cost labor transportation and any and all such other costs related to repairing a defective heater will be the responsibility of the owner TO THE FULL EXTENT ALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALE OF THE PRODUCT THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EX PRESSED WARRANTIES AND LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE TO TWO 2 YEARS ON ALL COMPONENTS FROM THE DATE OF FIRST PURCHASE AND DESA HEATING PRODUCTS LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF THE PROD UCT A
24. e control knob may need to be pressed in for 30 seconds or more This will allow air to bleed from the gas system If control knob does not pop up when re leased contact a qualified service person or gas supplier for repairs With control knob pressed in push down and release ignitor button This will light under water Immediately call a qualified ser vice technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water MN ocos MN Ignitor Button Figure 19 Control Knob In The OFF Position INSTRUCTIONS 1 STOP Read the safety information above 2 Make sure equipment shutoff valve is Thermocouple fully open Ignitor Electrode 3 Press in and turn control knob clockwise F lt N to the OFF position Pilot Burner 4 Wait five 5 minutes to clear out any gas Then smell for gas around heater and near the floor If you smell gas STOP Follow B in the safety information above If you don t smell gas go to the next step BASE E Figure 20 Pilot actual pilot may vary 107884 01H www desatech com 15 OPERATING HEATER Continued TO TURN OFF GAS TO APPLIANCE Shutting Off Heater 1 Press in and turn control knob clockwise N to the PILOT position 2 Turn control knob clockwise lt to the OFF position 3 Turn off all electric power to the appliance if service is to be performed Shutting Off B
25. e of ventilation grills or ducts IMPORTANT Do not provide openings for inlet or outlet air into attic if attic has a thermostat con trolled power vent Heated air entering the attic will activate the power vent gt Outlet Pri Air N c Outlet Air To Attic To Crawl Space Inlet a Air A Ventilated Inlet Air Crawl Space Figure 3 Ventilation Air from Outdoors INSTALLATION NOTICE This heater is intended for use as supplemental heat Use this heater along with your primary heating system Do not install this heater as your pri mary heat source If you have a central heating system you may run system s circulating blower while using heater This will help circulate the heatthroughout the house In the event of a power outage you can use this heater as your primary heat source A WARNING A qualified ser vice person must install heater Follow all local codes E Ss SSS SE 12 PAZ y Ventilation Grills 1 Into Adjoining Room Ventilation Option 2 Grills Or into Adjoining Remove Room Door into Option 1 Adjoinin Room Option 3 NN NN A k Figure 2 Ventilation Air from Inside Building CHECK GAS TYPE Use only the correct type of gas natural or propane LP If your gas supply is not the correct gas type do not install heate
26. eaks around doors and win dows may provide enough fresh air for combustion and ventilation However in buildings of unusually tight construction you must provide additional fresh air Unusually tight construction is defined as construction where a walls and ceilings exposed to the out side atmosphere have a continuous water vapor retarder with a rating of one perm 6x10 kg per pa sec m or less with openings gasketed or sealed and b weather stripping has been added on openable windows and doors and c caulking or sealants are applied to ar eas such as joints around window and door frames between sole plates and floors between wall ceiling joints be tween wall panels at penetrations for plumbing electrical and gas lines and at other openings If your home meets all of the three criteria above you must provide additional fresh air See Ventilation Air From Outdoors page 7 If your home does not meet all of the three criteria above proceed to Determining Fresh Air Flow For Heater Location page 6 Confined and Unconfined Space The National Fuel Gas Code ANSI Z223 1 NFPA 54 defines a confined space as a space whose vol ume is less than 50 cubic feet per 1 000 Btu per hour 4 8 m per kw of the aggregate input rating of all appliances installed in that space and an un confined space as a space whose volume is not less than 50 cubic feet per 1 000 Btu per hour 4 8 m per kw of the aggregate input
27. h care Follow all local codes In the absence of local codes use the latest edition of National Fuel Gas Code ANSI Z223 1 NFPA 54 Available from American National Standards Institute Inc 1430 Broadway New York NY 10018 National Fire Protection Association Inc Batterymarch Park Quincy MA 02269 PRODUCT IDENTIFICATION Heater Control Knob Cabinet lgnitor Button pon Grill Guard Glass Panel Front Panel Figure 1 Vent Free Gas Heater UNPACKING 1 Remove heater from carton 2 Remove all protective packaging applied to heater for shipment 3 Check heater for any shipping damage If heater is damaged promptly inform dealer where you bought heater PRODUCT FEATURES SAFETY DEVICE This heater has a pilot with an Oxygen Depletion Sensing ODS safety shutoff system The ODS pilot is a required feature for vent free room heat ers The ODS pilot shuts off the heater if there is not enough fresh air PIEZO IGNITION SYSTEM This heater has a piezo ignitor This system re quires no matches batteries or other sources to light heater THERMOSTATIC HEAT CONTROL Thermostat models have a thermostat sensing bulb and a control valve This results in the greatest heater comfort This can also result in lower gas bills 4 www desatech com 107884 01H AIR FOR COMBUSTION AND VENTILATION AR WARNING This heater shall not be installed in a confined space or unusually
28. ides the strongest hold Insert mounting screws through mounting bracket and into wall studs Attaching to Wall Anchor This method allows you to attach mounting bracket to hollow walls wall areas between studs or to solid walls concrete or masonry Decide which method better suits your needs Ei ther method will provide a secure hold for the mounting bracket Marking Screw Locations 1 Tape mounting bracket to wall where heater will be located Make sure mounting bracket is level A WARNING Maintain mini mum clearances shown in Fig ure 8 page 10 If you can provide greater clearances from floor and joining wall 107884 01H www desatech com 9 SS SSI INSTALLATION Continued Mark screw locations on wall see Figure 8 Note Only mark last hole on each end of mounting bracket Insert mounting screws through these holes only Remove tape and mounting bracket from wall 12 14 Min Only Insert Mounting 18 3 4 Screws Through Last Min Hole On Each End j Floor 30 000 Btu Hr Models Le 1 Min AN A E Only Insert Mounting 18 3 4 Screws Through Last Min Hole On Each End j Tanny Wart Floor 20 000 Btu Hr Models Figure 8 Mounting Bracket Clearances Attaching Mounting Bracket To Wall Note Wall anchors mounting screws and spac ers are in hardware package The hardware pack age is provided with heater Attaching To
29. ies from your local dealer If they can not supply these accessories ei ther contact your nearest Parts Central see page 31 or call DESA Heating Products at 1 866 672 6040 for referral information You can also write to the address listed on the back page of this manual BASE KIT GA4 EQUIPMENT SHUTOFF VALVE gt amassed Accessory for G models standard for W GA5010 models For locating heater on the floor away For all models Equipment shutoff valve with 1 8 from a wall Complete installation and operating NPT tap instructions included FAN KITS GA3250T For all models Provides better heat distribution Makes heater more efficient Complete installa tion and operating instructions included Thermostatically controlled blower turns itself on and off as required 30 www desatech com 107884 01H PARTS CENTRALS These Parts Centrals are privately owned businesses They have agreed to support our customer s needs by providing original replacement parts and accessories Baltimore Electric 1348 Dixwell Avenue Hamden CT 06514 0322 1 800 397 7553 203 248 7553 Parts Department Portable Heater Parts 342 N County Rd 400 East Valparaiso IN 46383 9704 All States 219 462 7441 1 888 619 7060 salesOportableheaterparts com techservice portableheaterparts com FBD 1349 Adams Street Bowling Green KY 42103 3414 270 846 1199 1 800 654 8534 Fax 1 800 846 0090 franktalk ao
30. ional information consult a qualified installer service agency or the gas supplier WARNING This is an unvented gas fired heater It uses air oxygen from the room in which it is installed Provisions for adequate combustion and ventilation air must be provided Refer to Air for Combustion and Ventilation section on page 5 of this manual This appliance may be installed in an aftermarket permanently located manufactured mobile home where not prohibited by local codes This appliance is only for use with the type of gas indicated on the rating plate This appliance is not convertible for use with other gases Aftermarket Completion of sale not for purpose of resale from the manufacturer TABLE OF CONTENTS Safety Information Local Codes Product Identification Unpacking Product Feature Air For Combustion And Ve Installation e eee ae Operating Heater micras 15 Inpecting Heater onuconnccicnnnonenionicnininacaninanins 18 Cleaning and Maintenance ococcicciccnionccnccnccn 19 Troubleshooting Specifications Service Hints Technical Service Service Publications Replacement Parts Illustrated Parts Breakdown and Parts List ACCOSSOMOS iicolirisicatinic lcd apta Parts Centrals Warranty Information oooinninnnincc Back Cover 2 www desatech com 107884 01H SAFETY INFORMATION IMPORTANT Read this owner s manual
31. isture condensation noticed on windows 1 Not enough combustion ven tilation air 1 Refer to Air for Combustion and Ventilation requirements page 5 107884 01H www desatech com 23 Btu Variable Type Gas Ignition Pressure Regulator Setting Inlet Gas Pressure in of water Maximum Minimum Dimensions Inches H x W x D Heater Carton Weight pounds Heater Shipping Btu Variable Type Gas Ignition Pressure Regulator Setting Inlet Gas Pressure in of water Maximum Minimum Dimensions Inches H x W x D Heater Includes knobs amp grill Carton Weight pounds Heater Shipping SPECIFICATIONS GN30 GN30T GWN30T 15 000 30 000 Natural Only Piezo 3 W C 10 5 4 24 4 x 25 4x 7 26 8 x 28 8 x 10 28 33 GP30 GP30T GWP30T 15 000 30 000 Propane LP Only Piezo 8 W C 14 11 24 4x 257 4x7 26 7 8 x 28 8 x 10 28 33 WMN20 GWN20 GWN20T 10 000 20 000 Natural Only Piezo 3 W C 10 5 4 24 4x 18 4x7 26 8 x 20 7 8 x 10 20 25 WMP20 GWP20 GWP20T 10 000 20 000 Propane LP Only Piezo 8 W C 14 11 24 4x 18 4x7 26 8 x 20 7 8 x 10 20 25 24 www desatech com 107884 01H SERVICE HINTS When Gas Pressure Is Too Low e pilot will not stay lit burner will have delayed ignition e heater will not produce specified heat e propane LP gas supply may be low You may feel your gas pressure is too l
32. ition THERMOSTAT CONTROL OPERATION The thermostatic control used on these models differs from standard thermostats Standard thermostats simply turn on and off the burner The thermostat used on this heater senses the room temperature The thermostat adjusts the amount of gas flow to the burner This increases or decreases the burner flame height At times the room may exceed the set temperature If so the burner will shut off The burner will cycle back on when room temperature drops below the set temperature The control knob can be set to any heat level between 1 and 5 Selecting the 5 setting will cause the burner to remain fully on without modulating down in most cases Note The thermostat sensing bulb measures the temperature of air near the heater cabinet This may not always agree with room tempera ture depending on housing construction instal lation location room size open air tempera tures etc Frequent use of your heater will let you determine your own comfort levels a MANUAL LIGHTING ES PROCEDURE 1 Remove front panel see Figure 7 page 9 Follow steps 1 through 5 under Lighting In structions pages 16 and 17 3 With control knob pressed in strike match Hold match to pilot until pilot lights 4 Keep control knob pressed in for 30 seconds after lighting pilot After 30 seconds release control knob Now follow step 8 under Light ing Instructions pages 16 and 17 5 Replace front panel 107
33. l com Master Parts Dist 1251 Mound Ave NW Grand Rapids MI 49504 2672 616 791 0505 1 800 446 1446 Fax 616 791 8270 www nbmc com Washer Equipment Co 1715 Main Street Kansas City MO 64108 2195 KS MO AR 816 842 3911 www washerparts com East Coast Energy Products 707 Broadway W Long Branch NJ 07764 1542 732 870 8809 1 800 755 8809 www njplaza com ecep Laporte s Parts amp Service 2444 N Sth Street Hartsville SC 29550 7704 843 332 0191 Parts Department Cans Unlimited Inc P O Box 645 Taylor SC 29687 0013 All States 803 879 3009 1 800 845 5301 cuisales aol com 107884 01H www desatech com 31 WARRANTY INFORMATION KEEP THIS WARRANTY Model 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 our standard written warranty We make no other warranty expressed or implied LIMITED WARRANTY VENT FREE RESIDENTIAL GAS HEATERS DESA 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 and maintained in accordance with all applicable instructions To make a claim under this warranty the Bill of Sale or cancelled check must be presented This warranty is exten
34. n This will light pilot The pilot is attached to the front of burner The pilot is attached to the front of the burner If needed keep pressing igni tor button until pilot lights Note 1f pilot does not stay lit refer to Troubleshooting pages 20 through 23 Also contact a qualified service person or gas supplier for repairs Until repairs are made light pilot with match To light pilot with match see Manual Lighting Procedure 7 Keep control knob pressed in for 30 sec onds after lighting pilot After 30 seconds release control knob e If control knob does not pop up when re leased contact a qualified service person or gas supplier for repairs Note If pilot goes out repeat steps 3 through 7 This heater has a safety inter lock system Wait one 1 minute before lighting pilot again 8 Turn control knob counterclockwise y gt to desired heating level The main burner should light Set control knob to any heat level between 1 and 5 A CAUTION Do not try to ad just heating levels by using the equipment shutoff valve Thermocouple Ignitor Electrode Pilot Burner Figure 22 Pilot actual pilot may vary TO TURN OFF GAS TO APPLIANCE Shutting Off Heater 1 Turn control knob clockwise to the OFF position 2 Turn off all electric power to the appliance if service is to be performed Shutting Off Burner Only pilot stays lit Turn control knob clockwise to the PI LOT pos
35. nd plugged 1 8 NPT tap Locate NPT tap within reach for test gauge hook up NPT tap must be upstream from heater see Figure 15 page 13 IMPORTANT Install an equipment shutoff valve in an accessible location The equipment shutoff valve is for turning on or shutting off the gas to the appliance Apply pipe joint sealant lightly to male NPT threads This will prevent excess sealant from go ing into pipe Excess sealant in pipe could result in clogged heater valves A WARNING Use pipe joint sealant that is resistant to liquid petroleum LP gas Install sediment trap in supply line as shown in Figure 15 page 13 Locate sediment trap where it is within reach for cleaning Locate sediment trap where trapped matter is not likely to freeze A sedi ment trap traps moisture and contaminants This keeps them from going into heater controls If sedi ment trap is not installed or is installed wrong heater may not run properly Propane LP rene Regulator Supply Tank Vent Pointing Down 4 Figure 14 External Regulator With Vent Pointing Down 12 www desatech com 107884 01H INSTALLATION Continued IMPORTANT Hold the pressure regulator with wrench when connecting it to gas piping and or fittings Do not over tighten pipe connection to regulator The regulator body could be damaged Pressure Regulator Heater Cabinet 3 8 NPT Pipe Nipple S Ground Joint
36. ner orifice Problem will stop after a few hours of operation Turn control knob to 1 posi tion and let warm up for a minute Operate burner until air is re moved from line Have gas line checked by local natural or propane LP gas company Observe minimum installation clearances see Figure 4 page 8 Clean burner see Cleaning and Maintenance page 19 or replace burner orifice White powder residue forming within burner box or on adjacent walls or furniture When heated vapors from furniture polish wax carpet cleaners etc may turn into white powder residue Turn heater off when using furniture polish wax carpet cleaners or similar products 22 www desatech com 107884 01H TROUBLESHOOTING Continued building A 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 e Immediately call your gas supplier from a neighbor s phone Follow the gas suppliers instructions If you cannot reach your gas supplier call the fire department IMPORTANT Operating heater where impurities in air exist may create odors Cleaning supplies paint paint remover cigarette smoke cements and glues new carpet or textiles etc create fumes These fumes may mix with combustion air and create odors OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Heater produces a clicking
37. nob of heateris in the OFF position Check all joints from equipment shutoff valve to thermostat gas valve see Figure 17 or 18 Apply a noncorrosive leak detection fluid to all joints Bubbles forming show a leak Correct all leaks at once Light heater see Operating Heater starting on page 15 Check all other internal joints for leaks Turn off heater see To Turn Off Gas to Appli ance page 16 or 17 depending on your model heater Replace front panel Gas Meter Thermostat Gas Valve A Mom Propane LP y Supply Tank Figure 17 Checking Gas Joints for Natural Gas Thermostat Gas Valve 0000000 Equipment Shutoff Valve Figure 18 Checking Gas Joints for Propane LP Gas 14 www desatech com 107884 01H OPERATING HEATER MANUAL CONTROL MODELS FOR YOUR SAFETY i READ BEFORE LIGHTING AX WARNING If you do not fol low these instructions exactly a fire or explosion may result causing property damage per sonal injury or loss of life A This appliance has a pilot which must be a TR lighted by hand When lighting the pilot ee A ARE gat tortie fronit of follow these instructions exactly ee ath allt rh ig pressing ignitor utton until pilot lights B BEFORE LIGHTING smell all around the appliance area for gas Be sure to smell next Note If pilot does not stay lit refer to to the floor because some gas is he
38. nspected yearly by a qualified service person We also recommend that you keep the burner tube and pilot assembly clean and free of dust and dirt To clean these parts we recommend using com pressed air no greater than 30 PSI Your local com puter store hardware store or home center may carry compressed air in a can You can use a vacuum cleaner in the blow position If using com pressed air in a can please follow the directions on the can If you don t follow directions on the can you could damage the pilot assembly 1 Shut off the unit including the pilot Allow the unit to cool for at least thirty minutes Inspect burner pilot for dust and dirt 3 Blow air through the ports slots and holes in the burner 4 Never insert objects into the pilot tube Clean the pilot assembly also A yellow tip on the pilot flame indicates dust and dirt in the pilot as sembly There is a small pilot air inlet about two inches from where the pilot flame comes out of the pilot assembly see Figure 27 With the unit off lightly blow air through the air inlet You may blow through a drinking straw if compressed air is not available Pilot Air Inlet Figure 27 Pilot Inlet Air Propane LP Pilot Shown CABINET Air Passageways e Use a vacuum cleaner or pressurized air to clean Exterior Use a soft cloth dampened with a mild soap and water mixture Wipe the cabinet to remove dust 107884 01H www desatech com 19 TROUBLESHOOT
39. odors IMPORTANT Vent free heaters add moisture to the air Although this is beneficial installing heater in rooms without enough ventilation air may cause mildew to form from too much moisture See Air for Combustion and Ventilation pages 5 through 7 Tf high humidity is experienced a dehumidifier may be used to help lower the water vapor content in the air A CAUTION If you install the heater in a home garage heater pilot and burner must be at least 18 inches above floor e locate heater where moving vehicle will not hit it You can locate heater on floor away from a wall An optional floor mounting stand is needed Pur chase the floor mounting stand from your dealer See Accessories page 30 A WARNING Never install the heater ina bedroom or bathroom inarecreational vehicle e where curtains furniture clothing or other flammable objects are less than 36 inches from the front top or sides of the heater as a fireplace insert in high traffic areas in windy or drafty areas For convenience and efficiency install heater where there is easy access for operation inspec tion and service e in coldest part of room An optional fan kit is available from your dealer See Accessories page 30 If planning to use fan locate heater near an electrical outlet CEILING Minimum PRES H Side iliii A H MM Minimum To Top Surface Of Carpeting 2
40. of traffic and away from furni ture and draperies Do not place clothing or other flammable material on or near the appliance Never place any objects on the heater Surface of heater becomes very hot when running heater Keep children and adults away from hot surface to avoid burns or clothing ignition Heater will re main hot for a time after shut down Allow surface to cool be fore touching Carefully supervise young chil dren when they are in the same room with heater Make sure grill guard is in place before running heater Keep the appliance area clear and free from combustible ma terials gasoline and other flam mable vapors and liquids This appliance is only for use with the type of gas indicated on the rating plate This appli ance is not convertible for use with other gases Do not place propane LP supply tank s in side any structure Locate propane LP supply tank s outdoors This heater shall not be installed in a bedroom or bathroom If you smell gas e shut off gas supply e do not try to light any appliance edo not touch any electrical switch do not use any phone in your building e immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions e if you cannot reach your gas supplier call the fire department This heater needs fresh outside air ventila tion to run properly This heater has an Oxy
41. ow If so contact your local natural or propane LP gas supplier TECHNICAL SERVICE You may have further questions about installation operation or troubleshooting If so contact DESA Heating Products Technical Service Department at 1 866 672 6040 When calling please have your model and serial numbers of your heater ready You can also visit DESA Heating Products tech nical service web site at www desatech com SERVICE PUBLICATIONS You can purchase a service manual from the address listed on the back page of this manual Send a check for 5 00 payable to DESA Heating Products REPLACEMENT PARTS Note Use only original replacement parts This will protect your warranty coverage for parts re placed under warranty PARTS UNDER WARRANTY Contact authorized dealers of this product If they can t supply original replacement part s call DESA Heating Products Technical Service De partment at 1 866 672 6040 When calling DESA Heating Products have ready e your name e your address model and serial numbers of your heater how heater was malfunctioning e type of gas used propane LP or natural gas e purchase date Usually we will ask you to return the part to the factory PARTS NOT UNDER WARRANTY Contact authorized dealers of this product If they can t supply original replacement part s either contact your nearest Parts Central see page 31 or call DESA Heating Products at 1 866 672 6040 for referral
42. r Call dealer where you bought heater for proper type heater WARNING This appliance is equipped for natural or pro pane LP gas Field conversion is not permitted 107884 01H www desatech com 7 INSTALLATION Continued INSTALLATION ITEMS Before installing heater make sure you have the items listed below e for propane LP gas external regulator supplied by installer e piping check local codes e sealant resistant to propane LP gas e equipment shutoff valve e ground joint union e sediment trap e tee joint e pipe wrench e for natural gas test gauge connection ACSA design certified equipment shutoff valve with 1 8 NPT tap is an acceptable alternative to test gauge connection The optional CSA design certified equipment shutoff valve can be purchased from your dealer See Accessories page 30 LOCATING HEATER This heater is designed to be mounted on a wall AV WARNING Maintain the minimum clearances shown in Figure 4 If you can provide greater clearances from floor ceiling and joining wall A CAUTION This heater cre ates warm air currents These currents move heat to wall sur faces next to heater Installing heater next to vinyl or cloth wall coverings or operating heater where impurities such as but not limited to tobacco smoke aromatic candles cleaning flu ids oil or kerosene lamps etc in the air exist may discolor walls or cause
43. rating of all ap pliances installed in that space Rooms communi cating directly with the space in which the appli ances are installed through openings not fur nished with doors are considered a part of the unconfined space Adjoining rooms are communicating only if there are doorless passageways or ventilation grills be tween them 107884 01H www desatech com 5 AIR FOR COMBUSTION AND VENTILATION Continued DETERMINING FRESH AIR FLOW FOR HEATER LOCATION Determining if You Have a Confined or Unconfined Space Use this work sheet to determine if you have a con fined or unconfined space Space Includes the room in which you will install heater plus any adjoining rooms with doorless pas sageways or ventilation grills between the rooms 1 Determine the volume of the space length x width x height Length x Width x Height volume of space Example Space size 20 ft length x 16 ft width x 8 ft ceiling height 2560 cu ft vol ume of space cu ft Tf additional ventilation to adjoining room is sup plied with grills or openings add the volume of these rooms to the total volume of the space 2 Multiply the space volume by 20 to determine the maximum Btu Hr the space can support 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 spa
44. shutoff valve was connected Pressurize supply piping system by either opening propane LP supply tank valve for propane LP gas or opening main gas valve lo cated on or near gas meter for natural gas or using compressed air Check all joints of gas supply piping system Apply a noncorrosive leak detection fluid to all joints Bubbles forming show a leak Correct all leaks at once Reconnect heater and equipment shutoff valve to gas supply Check reconnected fit tings for leaks Test Pressures Equal To or Less Than 1 2 PSIG 3 5 kPa 1 Equipment Shutoff Valve Close equipment shutoff valve see Figure 16 Figure 16 Equipment Shutoff Valve 107884 01H www desatech com 13 4 INSTALLATION Continued Pressurize supply piping system by either opening propane LP supply tank valve for propane LP gas or opening main gas valve lo cated on or near gas meter for natural gas or using compressed air Check all joints from gas meter for natural gas see Figure 17 or propane LP supply tank for propane LP gas to equipment shutoff valve see Figure 18 Apply a noncorrosive leak detection fluid to all joints Bubbles form ing show a leak Correct all leaks at once Pressure Testing Heater Gas Connections 1 Open equipment shutoff valve see Figure 16 page 13 For natural gas open main gas valve located on or near gas meter For propane LP gas open propane LP supply tank valve Make sure control k
45. the knob will not push in or turn by hand don t try to repair it call a qualified service tech nician or gas supplier Force or attempted repair may result in a fire or explosion Do not use this appliance if any part has been under water Immediately call a quali fied service technician to inspect the appli ance and to replace any part of the control system and any gas control which has been under water MN gt gt EN INSTRUCTIONS STOP Read the safety information Make sure equipment shutoff valve is fully open Turn control knob clockwise lt N to the OFF position Wait five 5 minutes to clear out any gas Then smell for gas including near the floor If you smell gas STOP Follow B in the safety information If you don t smell gas go to the next step Turn control knob counterclockwise x gt to the PILOT position Press in control knob for five 5 seconds see Figure 21 Note You may be running this heater for the first time after hooking up to gas sup ply If so the control knob may need to be pressed in for 30 seconds or more This will allow air to bleed from the gas system If control knob does not pop up when re leased contact a qualified service person or gas supplier for repairs Ignitor Button Control Knob D Position 16 www desatech com 107884 01H OPERATING HEATER Continued 6 With control knob pressed in push down and release ignitor butto
46. urner Only pilot stays lit Turn control knob clockwise to the PI LOT position ea MANUAL LIGHTING EN PROCEDURE 1 Remove front panel see Figure 7 page 9 2 Follow steps 1 through 5 under Lighting In structions page 15 3 With control knob pressed in strike match Hold match to pilot until pilot lights 4 Keep control knob pressed in for 30 sec onds after lighting pilot After 30 seconds release control knob Now follow step 8 under Lighting Instructions page 15 5 Replace front panel THERMOSTAT CONTROLLED MODELS El FOR YOUR SAFETY READ BEFORE LIGHTING A WARNING If you do not fol low these instructions exactly a fire or explosion may result causing property damage per sonal injury or loss of life A This appliance has a pilot which must be lighted by hand When lighting the pilot follow these instructions exactly B BEFORE LIGHTING smell all around the appliance area for gas Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor WHAT TO DO IF YOU SMELL GAS e Do not try to light any appliance e Do not touch any electric switch do not use any phone in your building e 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 Use only your hand to push in or turn the gas control knob Never use tools If
47. wn con trol knob Repeat igniting op eration until air is removed Contact local propane LP gas company Clean ODS pilot see Cleaning and Maintenance page 19 or replace ODS pilot assembly Replace gas regulator 20 www desatech com 107884 01H TROUBLESHOOTING OBSERVED PROBLEM Continued POSSIBLE CAUSE REMEDY ODS pilot lights but flame goes out when control knob is released Burner does not light after ODS pilot is lit Delayed ignition of burner 1 Control knob not fully pressed in Control knob not pressed in long enough Safety interlock system has been triggered Equipment shutoff valve not fully open Thermocouple connection loose at control valve Pilot flame not touching ther mocouple which allows thermocouple to cool caus ing pilot flame to go out This problem could be caused by one or both of the following A Low gas pressure B Dirty or partially clogged ODS pilot Thermocouple damaged Control valve damaged Burner orifice is clogged Inlet gas pressure is too low Manifold pressure is too low Burner orifice is clogged 1 2 Press in control knob fully After ODS pilot lights keep con trol knob pressed in 30 seconds Wait one minute for safety in terlock system to reset Repeat ignition operation Fully open equipment shutoff valve Hand tighten until snug then tighten 1 4 turn more A Cont

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