Desa GMP16T User's Manual
Contents
1. Ts Spacer Side View Figure 12 Installing Bottom Mounting Screws MOUNTING HEATER TO FLOOR WITH OPTIONAL FLOOR KIT Mounting Base Feet to Heater 1 pl y l 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 113048 01C 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 press2. Figure 28 Correct Burner Flame Pattern for Infrared Heaters Figure 29 Incorrect Burner Flame Pattern for Infrared Heaters 18 www desatech com 113048 01C 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 inspected yearly by a qualified service person We also recommend that you keep the
3. s 6 Rise Minimum Minimum PRESSE H Side iii ii A H Mt Minimum To Top Surface Of Carpeting ee 2 Tile Or Other 4 Combustible FLOOR Material Figure 4 Mounting Clearances As Viewed From Front of Heater 8 www desatech com 113048 01C 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 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 o
4. 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 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 Multiply the space volume by 20 to determine the maximum Btu Hr the space can support 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 Add the Btu Hr of all fuel burning appliances in the space 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 Vent free heater Btu Hr Gas water heater Btu Hr Gas furnace Btu Hr Vented
5. 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 2 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 30 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 30 Pilot Inlet Air 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 113048 01C www desatech com 19 TROUBLESHOOTING A WARNING Turn off and unplug heater and let cool before servic ing Only a qualified service
6. con tains and or generates chemicals known to the State of California to cause cancer or birth defects or other reproductive harm Due to high temperatures the appliance should be located out of traffic and away from furni ture and draperies IMPORTANT Read this owner s manual carefully and completely before trying to assemble oper ate or service this heater Im proper use of this heater can cause serious injury or death from burns fire explosion elec trical shock and carbon mon oxide poisoning Do not place clothing or other flammable material on or near the appliance Never place any objects on the heater A DANGER Carbon monoxide 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 poisoning may lead to death Carbon Monoxide Poisoning Early signs of car bon monoxide poisoning resemble the flu with head aches 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 alco hol and those at high altitudes Propane LP Gas Propane LP gas is a f
7. equipment shutoff valve to gas supply Check reconnected fittings for leaks Test Pressures Equal To or Less Than 1 2 PSIG 3 5 kPa 1 Close equipment shutoff valve see Figure 16 2 Pressurize supply piping system by opening propane LP supply tank valve or using com pressed air 3 Check all joints from propane LP supply tank to equipment shutoff valve see Figure 17 Apply a noncorrosive leak detection fluid to all joints Bubbles forming show a leak 4 Correct all leaks at once Equipment Shutoff Valve Closed Figure 16 Equipment Shutoff Valve Thermostat Gas Valve 0000000 Propane LP Supply Tank a Equipment Shutoff Valve lt Figure 17 Checking Gas Joints for Propane LP Gas 113048 01C www desatech com 13 INSTALLATION Continued PRESSURE TESTING HEATER GAS CONNECTIONS 1 NS Du Open equipment shutoff valve see Figure 16 page 13 Open propane LP supply tank valve Make sure control knob of heater is in the OFF position Check all joints from equipment shutoff valve to thermostat gas valve see Figure 17 page 13 Apply a noncorrosive leak detection fluid to all joints Bubbles forming show a leak Correct all leaks at once Light heater see Operating Heater page 14 Check all other internal joints for leaks Turn off heater see To Turn Off Gas to Appli ance page 15 or 16 Replace front panel OPE
8. gas heater Btu Hr Gas fireplace logs Btu Hr Other gas appliances Btu Hr Total Btu Hr 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 _20 000 Btu Hr Total _60 000 __ Btu Hr 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 6 www desatech com 113048 01C 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
9. knob clockwise x 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 lt N to the PI LOT position MN MANUAL LIGHTING PROCEDURE 1 Remove front panel see Figure 7 page 9 Follow steps 1 through 5 under Lighting In structions page 14 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 5 Replace front panel 113048 01C www desatech com 15 OPERATING HEATER Continued THERMOSTAT CONTROLLED MODELS LIGHTING A INSTRUCTIONS mi 1 STOP Read the safety information 2 Make sure equipment shutoff valve is fully open 3 Turn control knob clockwise N to the OFF position 4 Wait five 5 minutes to clear out any gas Then smell for gas including near the floor If you smell gas STOP Follow B in the safety information If you don t smell gas go to the next step 5 Turn control knob counterclockwise 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 t
10. ning in column 1 Make sure equipment shutoff valve is fully open Press in and turn control knob clockwise N to the OFF position 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 in column 1 If you don t smell gas go to the next step Press in control knob and turn counter clockwise y to the PILOT position Keep control knob pressed in for five 5 seconds see Figure 18 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 With control knob pressed in push down and release ignitor button This will light pilot The pilot is attached to the front of burner If needed keep pressing ignitor but ton until pilot lights Ignitor Button Control Knob IGNITOR Figure 18 Control Knob In The OFF Position 14 www desatech com 113048 01C OPERATING HEATER Continued Tf pilot does not light e turn control knob clockwise to the OFF position e repeat steps 5 and 6 If pilot does not stay lit after several tries e refer to Troubleshooting page 20 e contact a qualified service person or gas supplier for
11. 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 1 Ignitor electrode positioned 1 Replace pilot assembly there is no spark at ODS pilot 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 2 3 un 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 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 down con trol knob Repeat igniting op eration until air is removed Contact local propane LP gas company Clean ODS pilot see Cle
12. 01 107888 01 Control Position Label 111051 01 111051 01 Lighting Instruction Label Not a field replaceable part 113048 01C 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 extended 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 b
13. 0186 01 110186 01 Thermocouple Kit 098200 03 098200 03 Control Valve Bracket 105051 01 105050 02 Pilot Tubing 099218 08 099218 09 Burner 098508 01 098508 01 Valve Retainer Nut 099056 25 099056 25 Injector Plaque A or C 099056 01 099056 01 Injector Plaque B 103844 01 100747 01 Control Valve 103352 03 103353 04 Tubing Valve to Plaque A 103352 04 103353 05 Tubing Valve to Plaque B 103353 06 Tubing Valve to Plaque C 107660 01 107660 03 Inlet Tube A i a O M are ar or cae Cae If replacing ODS pilot and your model is pre 2002 your part number will be 103894 04 The thermocouple part number will be 098514 01 The electrode part number will be 098594 01 28 www desatech com 113048 01C ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST MODELS GMP16T AND GMP26T 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 Burner Assembly GMP26T KEY PART NUMBER NO GMP16T GMP26T DESCRIPTION QTY 110803 02 110803 02 ODS Pilot 110186 01 110186 01 Thermocouple Kit 099387 11 099387 03 Pilot Tubing 104818 03 104818 04 Outlet Tubing 099218 08 099218 09 Burner 099056 25 099056 25 Injector Plaque A or C 099056 01 09
14. 113048 01C AIR FOR COMBUSTION AND VENTILATION AR WARNING This heater shall not be installed in a confined space or unusually 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 NF PA 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 Th
15. 4 02 Reflector Assembly a i a a Cabinet Back Panel 097159 04 097159 04 097159 04 097159 04 Piezo Ignitor 099066 02 099066 02 099066 02 099066 02 Mounting Bracket 098271 09 098271 09 098271 09 098271 09 Ignitor Cable 098462 01 098462 01 Control Rod Assembly 098325 01 098325 01 Roll Pin 098354 03 098354 03 Control Knob OONOAARWNY 099415 18 099415 18 099415 18 099415 18 Gas Regulator 104819 02 104819 02 104819 02 104819 02 Regulator Bracket 098522 24 098522 24 Thermostat Gas Valve 102394 02 102394 02 Thermostat Valve Mounting Bracket gt 103256 02 103256 02 Inlet Tube 109303 04 109303 03 109303 04 109303 03 Baffle PARTS AVAILABLE NOT SHOWN 100642 03 100642 03 100642 03 100642 03 Hardware Assembly 109483 01 109483 01 109483 01 109483 01 Lighting Instruction Plate 105345 01 105345 01 105345 01 105345 01 Cable Tie 107888 01 107888 01 107888 01 107888 01 Control Position Label Not a field replaceable part 113048 01C www desatech com 27 ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST MODELS GMP16 AND GMP26 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 Burner Assembly GMP26 KEY PART NUMBER NO GMP16 GMP26 DESCRIPTION QTY 110803 02 110803 02 ODS Pilot 11
16. 9056 01 Injector Plaque B If replacing ODS pilot and your model is pre 2002 your part number will be 103894 04 The thermocouple part number will be 098514 01 The electrode part number will be 098594 01 113048 01C www desatech com 29 ILLUSTRATED PARTS BREAKDOWN MODELS GMP20BT AND GMP30BT 113048 01C www desatech com 30 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 KEY PART NUMBER NO GMP20BT GMP30BT DESCRIPTION QTY 097159 04 097159 04 Piezo Ignitor 107673 01 107676 01 Front Panel 103476 01 103476 02 Grill Guard 098522 11 098522 13 Thermostat Gas Valve 104189 01 104189 02 Bottom Glass Retainer 098260 09 098260 10 Glass SS Sn Cabinet 107894 10 107894 11 Deflector Assembly 098271 09 098271 09 Ignitor Cable 098249 01 098249 01 Nut 110803 02 110803 02 ODS Pilot Assembly 110186 01 110186 01 Thermocouple Kit 103446 01 103447 01 Burner 099387 03 099387 03 Pilot Tubing 103845 05 103845 07 Injector 099066 02 099066 02 Mounting Bracket 099415 18 099415 18 Gas Regulator NJF 8C NJF 8C Hex Nut 103255 02 103255 02 Outlet Tubing 103256 02 103256 02 Inlet Tubing 109303 04 109303 03 Baffle 220000 aA0DnN pr A A A O A O A GO E nn iii 100642 03 100642 03 Hardware Assembly 107888
17. DESA HEATING PRODUCTS UNVENTED VENT FREE PROPANE LP GAS HEATERS SAFETY INFORMATION AND INSTALLATION MANUAL We recommend that our A A products be installed and fe gt serviced by professionals who E 13 are certified in the U S by NFI P National Fireplace Institute m NSTITUS nA Giulia www nficertified org INFRARED GMP16 GMP16T GMP26 GMP26T BLUE FLAME GMP20BT GMP30BT 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 e Do not try to light any appliance Donottouch any electrical switch do not use any phone in your building Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s in structions If you cannot reach your gas supplier call the fire department Installation and service must be performed by a quali fied 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 Refer to this manual for correct installation and operational procedures For assistance or addi tional information cons
18. IES Purchase these heater accessories from your local dealer If they can not supply these accessories call DESA Heating Products at 1 866 672 6040 for re ferral information You can also write to the address listed on the back page of this manual EQUIPMENT SHUTOFF VALVE GA5010 For all models Equipment shutoff valve with 1 8 NPT tap 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 BASE KIT GA4550 For all models For locating heater on the floor away from a wall Complete installation and op erating instructions included ELECTRONIC IGNITOR KIT GA435 Not Shown For all piezo ignitor models Provides easier light ing of the pilot 113048 01C www desatech com 25 ILLUSTRATED PARTS BREAKDOWN MODELS GMP16 GMP26 GMP16T AND GMP26T 26 www desatech com 113048 01C 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 KEY PART NUMBER NO GMP16 GMP26 GMP16T GMP26T DESCRIPTION 107673 01 107676 01 107673 01 107676 01 Front Panel 103476 01 103476 02 103476 01 103476 02 Grill Guard xx xx xx xx Apron 107894 01 107894 02 107894 01 10789
19. Ignitor Electrode Pilot Burner Figure 22 Pilot actual pilot may vary TO TURN OFF GAS fae 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 position 16 www desatech com 113048 01C OPERATING HEATER Continued W THERMOSTAT CONTROL W 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 setting 5 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 Control K
20. RATING HEATER FOR YOUR SAFETY E 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 lighted by hand When lighting the pilot follow these instructions exactly 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 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 e 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 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 D Donot use this appliance if any part has been 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 MANUAL CONTROL MODELS 1 2 gt on 6 LIGHTING msrmucrions MMM STOP Read the safety information begin
21. 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 e model and serial numbers of your heater e 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 call DESA Heating Products at 1 866 672 6040 for re ferral information When calling DESA Heating Products have ready model number of your heater e the replacement part number ACCESSOR
22. al 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 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 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 page 5 If high humid ity 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 locate heater where moving vehicle will not hit it 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 25 If planning to use fan locate heater near an electrical outlet CEILING
23. anchors mounting screws and spac ers are in hardware package The hardware pack age is provided with heater Attaching To Wall Stud Method For attaching mounting bracket to wall studs 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 in wall 3 Insert mounting screws through bracket and into wall studs 4 Tighten screws until mounting bracket is firmly fastened 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 SH S YY SN pS Figure 9 Folding Figure 10 Popping Anchor Open Anchor Wings For Thin Walls Placing Heater On Mounting Brack
24. and crawl spaces 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 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 SS Ss SS j SBS 12 En PS Ny Ventilation Grills Into Adjoining Room Ventilation Option 2 Grills Or into Adjoining Remove Door into Option 1 Adjoining Room Option 3 A oO VEZ BB ESPN ESA PRE GB Ze Figure 2 Ventilation Air from Inside Building gt Ventilated Outlet i Air Attic Outlet Ai To Attic N To Crawl Space Inlet em ao a Air i 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 heat throughout 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 heat
25. aning and Maintenance page 19 or replace ODS pilot assembly Replace gas regulator 20 www desatech com 113048 01C TROUBLESHOOTING OBSERVED PROBLEM Continued POSSIBLE CAUSE REMEDY ODS pilot lights but flame goes out when control knobis 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 Contact local propane LP gas company B Clean ODS pilot see Cleaning and Maintenance page 19 or replace ODS pilot assembly Replace p
26. 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 26 shows a correct burner flame pattern Figure 27 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 incorrect as shown in Figure 27 turn heater off see To Turn Off Gas to Appli ance page 15 non thermostat models or page 16 thermostat models e see Troubleshooting page 20 Blue Flame 1 2 Glass Height AADAAMDALA AAAA AAALAAA A Y Figure 26 Correct Burner Flame Pattern for Blue Flame Heaters Yellow Tipping 2 Glass _ Height Figure 27 Incorrect Burner Flame Pattern for Blue Flame Heaters BURNER FLAME PATTERN FOR INFRARED HEATERS Figure 28 shows a correct burner flame pattern Fig ure 29 shows an incorrect burner flame pattern If burner flame pattern is incorrect as shown in Figure 29 turn heater off see To Turn Off Gas to Appli ance page 15 non thermostat models or page 16 thermostat models T
27. e burner until air is re moved from line Have gas line checked by local propane LP gas company 3 Observe minimum installation clearances see Figure 4 page 8 4 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 1 Turn heater off when using furniture polish wax carpet cleaners or similar products 22 www desatech com 113048 01C TROUBLESHOOTING Continued building Ay 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 supplier s instructions If you cannot reach your gas supplier call the fire department IMPORTANT Operating heater where impurities in air exist may create odors Cleaning supplies paint paint remover cigarette smoke cements and glues new carpet or textiles etc create fumes These fumes may mix with combustion air and create odors OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Heater produces a clicking 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
28. e information on pages 5 through76 will help you classify your space and provide adequate ventilation Unusually Tight Construction The air that leaks around doors and win dows may provide enough fresh air for combustion and ventilation However in buildings of unusually tight construction you must provide additional fresh air Unusually tight construction is defined as construction where 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 a
29. e 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 AND 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 fro
30. er Follow all local codes CHECK GAS TYPE Use only the correct type of gas propane LP If your gas supply is not the correct gas type do not install heater Call dealer where you bought heater for proper type heater AX WARNING This appliance is equipped for natural or propane LP gas Field conversion is not permitted 113048 01C www desatech com 7 INSTALLATION Continued INSTALLATION ITEMS Before installing heater make sure you have the items listed below 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 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 25 LOCATING HEATER This heater is designed to be mounted on a wall A WARNING Maintain the minimum clearances shown in Figure 4 If you can provide greater clearances from floor ceiling and joining wall 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 25 A WARNING Never install the heater ina bedroom or bathroom in a recreation
31. 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 page 13 Heater shuts off in use ODS op erates 3 ODS pilot is 1 Not enough fresh air is avail able 2 Low line pressure partially clogged 1 Open window and or door for ventilation 2 Contact local propane 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 page 13 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 page 13 Moisture condensation noticed on windows 1 Not enough combustion ven tilation air 1 Refer to Air for Combustion and Ventilation requirements page 5 113048 01C www desatech co
32. et 1 Stand Out Tab Mounting Bracket 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 attached to wall Figure 11 Mounting Heater Onto Mounting Bracket 10 www desatech com 113048 01C INSTALLATION Continued Installing Bottom Mounting Screws 1 E P 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 Wall Omm
33. ilot assembly Replace control valve Clean burner see Cleaning and Maintenance page 19 or replace burner orifice Contact local propane LP gas company Contact local propane 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 113048 01C www desatech com 21 TROUBLESHOOTING OBSERVED PROBLEM Continued POSSIBLE CAUSE REMEDY Yellow flame during burner com bustion 1 Not enough air Gas regulator defective Clogged or dirty burner 1 Check burner for dirt and de bris If found clean burner see Cleaning and Mainte nance page 19 2 Replace gas regulator 3 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 HI or to position 5 when burner is cold Air in gas line Air passageways on heater blocked Dirty or partially clogged burner orifice 1 Problem will stop after a few hours of operation 1 Turn control knob to LO or position and let warm up for a minute 2 Operat
34. is not installed or is installed wrong heater may not run properly 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 CHECKING GAS CONNECTIONS A WARNING Test all gas pip ing and connections internal and external to unit for leaks afterinstalling 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 Make sure exter nal regulator has been installed between propane LP supply and heater See guidelines under Con necting 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 ex cess of 1 2 psig will damage heater regulator 2 Cap off open end of gas pipe where equip ment shutoff valve was connected 3 Pressurize supply piping system by opening propane LP supply tank valve or using com pressed air 4 Check all joints of gas supply piping system Apply a noncorrosive leak detection fluid to all joints Bubbles forming show a leak 5 Correct all leaks at once 6 Reconnect heater and
35. k of less than 100 lbs capacity 14 Provide adequate clearances around air openings LOCAL CODES Install and use heater with 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 L AS 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
36. m 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 Includes knobs amp grill 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 Carton Weight pounds Heater Shipping SPECIFICATIONS GMP30BT 15 000 30 000 Propane LP Only Piezo 8 W C 14 11 24 4 x 25 3 4x 7 26 3 8 x 28 8 x 10 28 33 GMP16 GMP16T 6 000 11 000 16 000 Propane LP Only Piezo 8 W C 14 11 24 4x 18 4x 7 26 3 8 x 20 7 8 x 10 20 25 GMP20BT 10 000 20 000 Propane LP Only Piezo 8 W C 14 11 24 4 x 18 4x7 26 7 8 x 20 7 8 x 10 20 25 GMP26 GMP26T 6 000 16 000 26 000 Propane LP Only Piezo 8 WC 14 11 24 4 x 25 4x 7 26 3 8 x 28 8 x 10 28 33 Note Dimensions listed are outer most pointson the heater includes control knobs and grill For purposes of input adjustment 24 www desatech com 113048 01C 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 low If so contact your local propane LP gas supplier TECHNICAL
37. m 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 l 113048 01 113048 01 Rev C NOT A UPC 04 04
38. must be upstream from heater see Figure 15 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 Pressure Regulator Heater Cabinet 3 8 NPT Pipe Nipple S W Th Ground Joint 3 Tee Joint Union S Reducer Equipment O Bushing to h Shutoff 27 1 8 NPT Valve 3 1 8 NPT dl 3 Plug Tap vo F g Tee Joint 3 Min Pipe From External 2 Nipple Regulator 11 W C to 3 cop 14 W C Pressure Figure 15 Gas Connection ACSA 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 25 12 www desatech com 113048 01C INSTALLATION Continued 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 AX WARNING Use pipe joint sealantthat is resistant to liquid petroleum LP gas Install sediment trap in supply line as shown in Figure 15 page 12 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
39. n 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 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 113048 01C 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 cu ft Example Space size 20 ft length x 16 ft width x 8 ft ceiling height 2560 cu ft vol ume of space Example 51 200 Btu Hr maximum the space can support 60 000 Btu Hr actual amount of Btu Hr used The space in the above example is a confined space because the actual Btu Hr used is more than the maxi mum Btu Hr the space can support You must pro vide additional fresh air Your options are as follows
40. ne of two ways 1 Attaching to wall stud 2 Attaching to wall anchor Attaching to Wall Stud This method provides 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 113048 01C www desatech com 9 INSTALLATION Continued 2 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 3 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 SS SSI Floor 30 000 Btu Hr Models L 8 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
41. nob GMP16T GMP26T COM hE e Figure 23 Burner Patterns for Infrared Heaters Only IN MANUAL LIGHTING UN PROCEDURE 1 Remove front panel see Figure 7 page 9 2 Follow steps 1 through 5 under Lighting In structions 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 sec onds after lighting pilot After 30 seconds release control knob Now follow step 8 under Lighting Instructions page 16 5 Replace front panel INSPECTING HEATER Check pilot flame pattern and burner flame pat tern often PILOT FLAME PATTERN Figure 24 shows a correct pilot flame pattern Figure 25 shows an incorrect pilot flame pat tern The incorrect pilot flame is not touching the thermocouple This will cause the thermo couple to cool When the thermocouple cools the heater will shut down Tf pilot flame pattern is incorrect as shown in Figure 25 turn heater off see To Turn Off Gas to Appli ance page 16 e see Troubleshooting page 20 Thermocouple Blue Flame EY Pilot Burner Figure 24 Correct Pilot Flame Pattern Thermocouple Yellow Flame Pilot lt Burner Figure 25 Incorrect Pilot Flame Pattern 113048 01C www desatech com 17 INPECTING HEATER Continued BURNER FLAME PATTERN FOR BLUE FLAME HEATERS A WARNING If yellow tipping occurs your heater could pro
42. o bleed from the gas system e If control knob does not pop up when re leased contact a qualified service person or gas supplier for repairs 6 Keep thermostat control knob pressed in while pushing down and releasing the igni tor button see Figure 21 This will light pilot If necessary continue to press igni tor button until pilot lights If pilot does not light turn thermostat control knob clockwise 7 to the OFF position e repeat steps 5 and 6 Tf pilot does not stay lit after several tries e refer to Troubleshooting page 20 e contact a qualified service person or gas supplier Until repairs are made light pilot with match To light pilot with match see Manual Lighting Procedure page 17 Ignitor Button i Figure 21 Control Knob In The OFF Position Control Knob 7 Keep control knob pressed in for 30 sec onds after lighting pilot After 30 seconds release control knob 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 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
43. 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 Note If pilot goes out repeat steps 3 through 7 8 Press in and turn control knob counter clockwise y to the HIGH position Set control knob to desired heat setting A CAUTION Do not try to ad just heating levels by using the equipment shutoff valve Thermocouple Ignitor Electrode Pilot Burner Figure 19 Pilot actual pilot may vary TO SELECT HEATING LEVEL FOR INFRARED HEATERS AX WARNING When running heater set control knob at LOW MED or HI locked positions Never set control knob between locked positions Poor combus tion and higher levels of carbon monoxide may result A CAUTION Do not try to ad just heating levels by using the equipment shutoff valve Slightly press in control knob and turn coun terclockwise 47 gt to the LOW MED or HI positions see Figure 20 IMPORTANT Release downward pressure while turning control knob Control knob will lock at the desired position Control Knob GMP16 GMP26 LOW Oo iz i MED Om j HIGH OFF Figure 20 Burner Patterns for Non Thermostat Models MN TO TURN OFF GAS TO APPLIANCE Shutting Off Heater 1 Turn control
44. t reach your gas supplier call the fire department 113048 01C www desatech com 3 SAFETY INFORMATION Continued 5 This heater needs fresh outside air ventila tion to run properly This heater has an Oxy 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 page 5 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 tan
45. uel gases Fuel gases are odorless An odor making agent is added to fuel gas The odor helps you detect a fuel gas leak However 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 A WARNING Do not use a blower insert heat exchanger insert or other accessory not ap proved for use with this heater 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 immediately call your gas supplier from a neighbor s phone Follow the gas suppliers instructions e if you canno
46. ult 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 Troubleshooting Safety Information Local Codes Specifications i Product Identification Service Hints Unpacking ees Product Feature Service Publications Air For Combustion and Ve Replacement Parts Installation ooooonncnnnonncnnnnonncccnncnnn 7 ACCeESSOT eES ooocoocccnncco 25 4 a4 4 Technical Service 4 5 Operating Heater ooooncccncccoccccoccconcccnnccrnnccnncnnnno 14 Illustrated Parts Breakdown and Parts List 26 Inspecting Heater cece eee eeeeerees 17 Warranty Information Back Cover Cleaning and Maintenance 0 ee 19 2 www desatech com 113048 01C SAFETY INFORMATION ARWARNING This product
47. ure regulator Ay WARNING A qualified ser vice person must connect heater to gas supply Follow all local codes A CAUTION Never connect heater directly to the propane LP supply This heater requires an external regulator not sup plied Install the external regu lator between the heater and pro pane LP supply The installer must supply an external regulator The external regulator will reduce incoming gas pressure You must reduce incoming gas pressure to between 11 and 14 inches of water If you do not reduce incoming gas pressure heater regula tor damage could occur Install the external regu lator with the vent pointing down as shown in Fig ure 14 Pointing the vent down protects it from freezing rain or sleet Propane LP Extemal Regulator Supply Tank y Vent Pointing Down E PO 5 Figure 14 External Regulator With Vent Pointing Down 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 GMP20PT GMP16 T 3 8 or greater GMP30BT GMP26 T 1 2 or greater Installation must include equipment shutoff valve union and plugged 1 8 NPT tap Locate NPT tap within reach for test gauge hook up NPT tap
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