Service Manual - Desa Parts and Desa Tech Support Manuals
Contents
1. 110373 01F www desatech com 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 WARRANTIES FOR NEW AND FACTORY RECONDITIONED PRODUCTS New Products DESA Heating Products warrants this heater and any parts thereof to be free of defects in materials and workmanship for two 2 years from the date of first purchase when operated and maintained in accordance with the manufacturer s instructions These warranties are extended only to the original retail purchaser when proof of purchase is provided Factory Reconditioned Heaters DESA Heating Products warrants this factory reconditioned heater and any parts thereof to be free of defects in materials and workmanship for thirty 30 days from the date of first purchase when operated and maintained in accordance with the manufacturer s instructions These warranties are extended only to the original retail purchaser when proof of purchase is provided 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 DESA2. S Figure 4 Figure 5 aaia Thin Folding Anchor Open Anchor Wings For Thin Walls 6 www desatech com 110373 01F 5 INSTALLATION Continued Tighten two screws until 1 16 space thick ness of penny is between screwheads and wall see Figure 6 Thin or Thick Wall thick wall shown Solid Wall Figure 6 Tightening Anchors Placing Heater On Mounting Screws 1 Locate two keyhole slots on back panel of heater see Figure 7 Place large openings of slots over screwheads Slide heater down until screws are in small portion of slots Keyhole Slots Figure 7 Location Of Keyhole Slots On Back Panel Of Heater Removing Front Panel Of Heater 1 Remove two screws near bottom corners of front panel Lift straight up on grill guard until it stops Grill guard will slide up about 1 4 Pull bottom of front panel forward then down Figure 8 Removing Front Panel Of Heater Installing Bottom Mounting Screw Locate bottom mounting hole This hole is near bottom on back panel of heater see Figure 9 Mark screw location on wall Remove heater from wall If installing bottom mounting screw into hol low or solid wall install wall anchor Follow steps through 5 under Attaching To Wall Anchor Method page 6 If installing bottom mounting screw into wall stud drill hole at marked location using 9 64 drill bit Replace heater on wall In
3. for dust and dirt 3 Blow air across 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 22 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 Propane LP Pilot Shown Figure 23 Injector Holder On Burner Tube CABINET Air Passageways Use pressurized air to clean Exterior Use a soft cloth dampened with a mild soap and water mixture Wipe the cabinet to remove dust 110373 01F www desatech com 13 TROUBLESHOOTING WARNING Turn off and unplug heater and let cool before servicing 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 1 2 3 there is no spark at ODS pilot 4 Ignitor electrode positioned wrong Ignitor electrode broken Ignitor electrode not connected to ignitor cable Ignitor cable pinched or wet Piezo ignitor nut is loose Broken ignitor ca
4. heater Improper use of this heater can cause serious injury or death from burns fire explosion electrical shock and carbon monoxide poisoning DANGER Carbon monoxide poisoning may lead to death Carbon Monoxide Poisoning Early signs of carbon 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 alcohol and those at high altitudes 110373 01F SAFETY INFORMATION Continued Propane LP Gas Propane LP gas is a fuel gas Fuel gases are odorless An odor making agent is added to fuel gases 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 AX WARNING Any change to this heater or its controls can be dangerous AX WARNING Do not use a blower insert heat exchanger insert or other accessory notap proved for use with this heater ARWARNING Ifthe recreational or commercial enclosure does not have a window or roof vent DO NOT USE THIS HEATER inside This heater
5. 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 temperature depending on housing construction installation location room size open air temperatures etc Frequent use of your heater will let you determine your own comfort levels i MANUAL LIGHTING PROCEDURE 1 Remove front panel see Figure 8 page 7 2 Follow steps 1 through 7 under Lighting Instructions page 11 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 9 under Light ing Instructions page 11 5 Replace front panel INSPECTING HEATER Check pilot flame pattern and burner flame pat tern often PILOT FLAME PATTERN Figure 18 shows a correct pilot flame pattern Figure 19 shows an incorrect pilot flame pattern The incorrect pilot flame is not touching the thermocouple This will cause the thermocouple to cool When the thermocouple cools
6. not convertible for use with other gases This heater may be used in a recreational enclosure or temporary construction work enclosure with a remote refillable propane LP cylinder ONLY when the cylinder is located outdoors and the heater is used with the hose kit LPA3090 included with this heater NEVER bring a refillable propane LP cylinder indoors A fire or explosion can occur causing property damage serious injury or death Use only the hose and factory preset regulator provided with the heater Use only replacement pressure regulators and hose assemblies speci fied in this manual See Accessories page 17 110373 01F www desatech com 3 10 11 12 14 15 16 17 18 19 SAFETY INFORMATION Continued Inspect the hose before each use of the heater If it is evident there is excessive abrasion or wear or the hose is cut it must be replaced prior to the heater being put into operation Use replacement hose assembly kit LPA3090 see Accessories page 17 Use only propane gas set up for vapor with drawal This heater shall not be installed in a bedroom or bathroom This heater needs fresh outside air ventilation to run properly This heater has an Oxygen Depletion Sensing ODS safety shutoff sys tem The ODS shuts down the heater if not enough fresh air is available You must provide a minimum 10 square inches of ventilation air for adequate combustion If heater shuts off do not re
7. should be inspected before each use Frequent clean ing may be required The control compartments burners and cir culating air passageways of the heater must be kept clean Due to high temperatures the appliance should be located out of traffic and away from combus tible materials Children and adults should be alerted to the hazard of high surface temperature and should stay away to avoid burns or clothing ignition Do not place clothing or other flammable material on or near the appliance Never place any objects on the heater Heater will remain hot for a time after shutdown Allow surface to cool before touching Young children should be care fully supervised when they are near the heater Any safety screen or guard removed for servicing the ap pliance must be replaced prior to operating the heater Keep the appliance area clear and free from combustible ma terials gasoline and other flam mable vapors and liquids i Install and use heater with care Follow all local ordinances and codes In the absence of local ordinances and codes refer to the Standard for Storage and Handling of Lique fied Petroleum Gas ANSI NFPA 58 and the Natural Gas Installation Code CAN CGA B149 2 This instructs on the safe storage and handling of propane LP gases This appliance is only for use with the type of gas indicated on the rating plate This ap pliance is
8. Burner damaged 4 Gas regulator defective 1 Clean burner see Cleaning and Maintenance page 13 or replace burner orifice 2 Contact local propane LP gas company 3 Replace burner 4 Replace gas regulator Yellow flame during burner combustion 1 Not enough air 2 Inlet gas pressure is too low 3 Gas regulator defective 1 Check burner for dirt and debris If found clean burner see Cleaning and Mainte nance page 13 2 Contact local propane LP gas company 3 Replace gas regulator Slightsmoke orodor during initial operation Residues from manufacturing processes 1 Problem will stop after a few hours of operation Heater produces a whistling noise when burner is lit Turning control knob to high est position when burner is cold 2 Air in gas line 3 Air passageways on heater blocked 4 Dirty or partially clogged burner orifice Turn control knob to lowest position and let warm up for a minute 2 Operate burner until air is removed from line Have gas line checked by local propane LP gas company 3 Observe minimum installation clearances see Figure 2 page 6 4 Clean burner see Cleaning and Maintenance page 13 or replace burner orifice Heater produces a clicking tick ing noise just after burner is lit or shut off Metal expanding while heating or contracting while cooling 1 This is normal with most heat ers If noise is excessive c
9. DESA INDOOR OUTDOOR PRODUCTS BLUE FLAME VENT FREE PROPANE LP GAS HEATER OWNER S OPERATION AND INSTALLATION MANUAL are National Fireplace Institute Gaia www nficertified org We recommend that our products be installed and serviced by professionals who MODELS REM10PT AND RH10PT 10 000 Btu Hr Thermostatically Controlled Heater WARNING If the information in this manual is not fol lowed exactly a fire or explosion may result causing property damage personal injury or loss of life Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS e 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 supplierfrom a neighbor s phone Follow the gas supplier s instructions 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 INSTALLER Leave this manual with the appliance CONSUMER Retain this manual for future reference For more information visit www desatech com TABLE OF CONTENTS Safety Informatio ss2ic sc3scicecdecceeecedececseszatsessessesse 2 Local CdS enaa 4 Unpacking oieee ssai cin 4 Product Features coooocnccnincccocccoccccoccnoncncnncnonnnnnno 4 Product identific
10. 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 installer 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 EXPRESSED WARRANTIES AND LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES INCLUD ING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE TO TWO 2 YEARS ON ALL COMPONENTS FROM THE DATE OF FIRST PURCHASE AND DESA HEATING PRODUCTS LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF THE PRODUCT AND DESA HEATING PRODUCTS SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVER INCLUDING INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES Some states do not allow a limitation on how long an implied warr
11. LP gas cylinders of the U S Department of Transportation DOT Use this heater only with a propane LP vapor withdrawal supply system See Chapter 5 of the Standard for Storage and Handling of Liquefied Petroleum Gas ANSI NF PA 58 and or CAN CGA B149 2 Your local library or fire department will have this booklet The amount of propane LP gas ready for use from propane LP tanks varies Two factors decide this amount 1 The amount of propane LP gas in tank s 2 The temperature of tank s This heater is designed for use with a 20 or 40 pound refillable propane LP cylinder when used as a self contained heating system with hose and regulator Larger tanks may be used if installed in a permanent gas supply system The propane LP cylinder used must include a collar to protect the cylinder valve and a listed overfilling prevention device OPD INSTALLATION CHECK GAS TYPE Use only propane LP gas If your gas supply is not propane LP do not install heater Call dealer where you bought heater for proper type heater Ay WARNING This appliance is equipped for propane LP gas Field conversion is not permitted LOCATING HEATER WARNING Maintain the mini mum clearances shown in Figure 2 page 6 If you can provide greater clearances from floor ceiling and joining wall Ad WARNING Never install the heater e ina bedroom or bathroom e where curtains furniture clothing or other flammable objects ar
12. NING Maintain mini mum clearances shown in Figure 3 If you can provide greater clearances from floor and join ing wall 2 Mark two mounting screw locations on wall see Figure 3 E 8 le 7 3 4 Minimum To Maintain 6 Clearance A From Wall 1 x Mounting 20 1 4 Screw Minimum To Locations Maintain 3 z Clearance O From Floor 2 FLOOR Figure 3 Mounting Screw Locations Installing Two Mounting Screws Note Wall anchors and mounting screws are in hardware package The hardware package is provided with heater Attaching To Wall Stud Method For attaching mounting screw to wall stud i Drill hole at marked location using 9 64 drill bit Insert mounting screw into wall stud Tighten screw until 1 16 space thickness of penny is between screwhead and wall Attaching To Wall Anchor Method Follow instructions below to attach mounting screws 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 see Figure 4 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 see Figure 5 IMPORTANT Do not hammer key For thick walls over 1 2 thick or solid walls do not pop open wings CA
13. anty 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 DO ES A INDOOR OUTDOOR PRODUCTS 2701 Industrial Drive P O Box 90004 Bowling Green KY 42102 9004 www desatech com 110373 01 Rev F 03 06 110373 01 NOT A UPC
14. ation 0 lt cc0rcreceenesssnccasasccssesssnns 5 Propane LP SUD Dy issii oceneni 5 A vince 5 Operating Heater wen Inspecting Heater sisside 12 Cleaning and Maintenance 13 SAFETY INFORMATION WARNING Improper in stallation adjustment al teration service or main tenance can cause in jury or property damage Refer to this manual for correct installation and operational procedures For assistance or addi tional information con sult a qualified installer service agency or the gas supplier WARNING This is an unvented gas fired heat er 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 Ven tilation section on page 5 of this manual 2 www desatech com ACCESSO ES esi sf aea roenan eraai eiaei tas 17 Replacement Parts ooocconcccncconccccnccconcnonnncnncnnno 17 Illustrated Parts Breakdown and Parts List 18 Warranty Information c ceeee Back Cover 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 Ay WARNING This product contains and or generates chemicals known to the State of California to cause cancer or birth defects or other reproduc tive harm IMPORTANT Read this owner s manual carefully and completely before trying to assemble operate or service this
15. ble Bad piezo ignitor 1 Replace pilot assembly 2 Replace pilot assembly 3 Reconnect ignitor cable 4 Free ignitor cable if pinched by any metal or tubing Keep ignitor cable dry 5 Tighten nut holding piezo ignitor to heater cabinet Nut is located inside heater cabinet at top 6 Replace ignitor cable 7 Replace piezo ignitor When ignitor button is pressed there is spark at ODS pilot but no ignition Gas supply turned off or equipment shutoff valve closed Control knob not in PILOT posi tion Control knob not pressed in while in PILOT position Air in gas lines when installed Depleted gas supply ODS pilot is clogged Gas regulator setting is not correct 1 Turn on gas supply or open equipment shutoff valve Turn control knob to PILOT position 3 Press in control knob while in PILOT position 2 4 Continue holding down control knob Repeat igniting operation until air is removed 5 Contact local propane LP gas company 6 Clean ODS pilot see Cleaning and Maintenance page 13 or replace ODS pilot assembly 7 Replace gas regulator ODS pilot lights but flame goes out when control knob is re leased 1 2 Control knob not fully pressed in Control knob not pressed in long enough Safety interlock system has been triggered Equipment shutoff valve not fully 4 open Thermocouple connection loose at control valve Pilot flame not touchin
16. e You must reduce incoming gas pressure to between 11 and 14 of water If you do not reduce incoming gas pressure heater regulator damage could occur Install the external regulator with the vent pointing down as shown in Figure 12 Pointing the vent down protects it from freezing rain or sleet Y External Propane LP Regulator Supply Tank lt A Vent Pointing Down Figure 12 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 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 must be upstream from heater see Figure 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 going 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 Pressure 3 8 NPT Regulator Pipe Nipple Heater eee Cabin
17. e less than 36 from the front top or sides of the heater e as a fireplace insert e in high traffic areas e in windy or drafty areas 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 odors 110373 01F www desatech com 5 INSTALLATION Continued A CAUTION If you install the heater in a home garage e heater pilot and burner must be at least 18 above floor e locate heater where moving vehicle will not hit it For convenience and efficiency install heater e where there is easy access for operation inspec tion and service e in coldest part of room CEILING 36 Minimum gr Minimum From A Sides Of PODIAN Heater 00 Right Left Side Side Minimum To Top Surface r Of Carpeting T Tile Or Other Combustible FLOOR Material Figure 2 Mounting Clearances As Viewed From Front of Heater THERMOSTAT SENSING BULB The thermostat sensing bulb is located inside the heater Do not move this bulb during installation or operation of the heater INSTALLING HEATER TO WALL Marking Screw Locations 1 Determine where you will locate heater AX WAR
18. et oin int Union Tee Joint Reducer os Equipment Bushing to _ 3 2 Shutoff Valve 1 8 NPT 9 2 Cc 1 8 NPT 3 5 From LO External 5 Plug Tap Regulator Tee 11 W C 3 Joint 5 to 14 W C Yy Pipe fE Min 5 Pressure m Nipple 3 Cap 77 Figure 13 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 17 The 90 elbow on the regulator is removed and the 3 8 NPT pipe nipple is installed in its place 110373 01F www desatech com 9 INSTALLATION Continued CHECKING GAS CONNECTIONS FOR PERMANENT GAS SUPPLY AR WARNING Testall gas piping and connections internal and external to unit for leaks after installing or servicing Correct all leaks at once A WARNING Never use an open flame to check for a leak Apply anoncorrosive leak detec tion 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 Connecting to Permanent Gas Supply page 8 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 ga
19. etroleum Gases ANSI NFPA 58 Follow all local codes Always store propane tanks outdoors 2 Place plastic cover caps over brass fittings on inlet connector and hose regulator assembly 3 Store in dry clean and safe place Do not store hose regulator assembly inside heater combustion chamber 4 When taking heater out of storage always check inside of heater Insects and small animals may place foreign objects in heater SPECIFICATIONS REM10PT AND RH10PT e Rating 5 000 10 000 Btu Hr Variable e Type Gas Propane LP Only e Ignition Piezo e Internal Regulator Setting 8 W C e Inlet Gas Pressure to Heater inches of water 14 Max 11 Min Supply Pressure to Regulator Min for input adjustment 10 psi Max 200 psi 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 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 techni cal service web site at www desatech com SERVICE PUBLICATIONS You can purchase a service manual fro
20. f your heater e the replacement part number 110373 01F www desatech com 17 ILLUSTRATED PARTS BREAKDOWN MODELS REM10PT AND RH10PT Pilot 18 www desatech com 110373 01F PARTS LIST This list contains replaceable parts used in your heater When ordering parts follow the instructions listed under Replacement Parts on page 17 of this manual KEY NO PART NO 1 098304 01 2 099467 09 099467 10 3 099318 04 4 101108 01 5 102017 02 6 098260 11 7 099319 02 8 110701 01 9 099317 02 10 098271 09 11 098249 01 12 110803 02 13 104263 03 14 099387 11 15 104259 06 16 NJF 8C 17 099415 18 18 104261 01 19 104264 01 20 098522 18 21 kk 22 097159 04 100642 02 LPA3090 107888 04 116360 01 116360 02 105345 01 DESCRIPTION Screw 10 x 3 8 Front Panel Assembly Front Panel Assembly Grill Guard Grill Guard Clip Bottom Glass Retainer Glass Panel Top Glass Retainer Elbow Fitting Deflector Unit Ignitor Cable Nut M5 ODS Pilot Assembly Burner Pilot Tubing Injector 1 Piece Hex Nut Pressure Regulator Burner Tubing Regulator Tubing Thermostat Gas Valve Cabinet Piezo Ignitor i a es PARTS AVAILABLE NOT SHOWN ET Hardware Assembly E Hose Regulator Assembly Control Position Decal Lighting Warning Tag Eng _Lighting Warning Tag Span Wire Tie Not a field replaceable part pS gt ee ee
21. g thermo couple which allows thermocouple to cool causing 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 ll 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 3 S 6 B Clean ODS pilot see Clean ing and Maintenance page 13 or replace ODS pilot assembly 7 Replace pilot assembly 8 Replace control valve www desatech com 110373 01F TROUBLESHOOTING OBSERVED PROBLEM Continued POSSIBLE CAUSE REMEDY Burner does not light after ODS pilot is lit 1 Burner orifice is clogged 2 Inlet gas pressure is too low 1 Clean burner see Cleaning and Maintenance page 13 or replace burner orifice 2 Contact local propane LP gas company Delayed ignition of burner 1 Manifold pressure is too low 2 Burner orifice is clogged Contact local propane LP gas company 2 Clean burner see Cleaning and Maintenance page 13 or replace burner orifice Burner backfiring during com bustion 1 Burner orifice is clogged or damaged 2 Inlet gas pressure is too low 3
22. ilot with match To light pilot with match see Manual Lighting Procedure page 12 Keep control knob pressed in for 30 seconds 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 4 thru 7 Thermostat models have a safety interlock system Wait one 1 minute before lighting pilot again Turn control knob counterclockwise to desired heating level The main burner should light A CAUTION Do not try to ad just heating levels by using the equipment shutoff valve Ignitor Button Control Knob E gt Figure 16 Control Knob In The OFF Position Thermocouple Figure 17 Pilot 110373 01F www desatech com 11 OPERATING HEATER Continued E 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 PILOT position ze THERMOSTAT CONTROL OPERATION The thermostatic control used on these models differs from standard thermostats Standard ther mostats 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
23. light until you provide fresh outside air If heater keeps shutting off have it serviced Keep all air openings in front and bottom of heater clear and free of debris This will insure enough air for proper combustion 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 Turn off and let cool before servicing Only a qualified service person should service and repair heater Operating heater above elevations of 4 500 feet could cause pilot outage Turn off propane LP supply when not in use Check heater for damage before each use Do not use a damaged heater Do not alter heater Keep heater in its original state Do not use heater if altered This heater can only be used in a recreational or commercial enclosure with a window or roof vent This heater is not for outdoor use Before using the heater provide adequate ventilation An area of 10 square inches of opening of a window or roof vent is needed for adequate combustion and ventilation air LOCAL CODES Install and use heater with care Follow all lo cal 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 Bat
24. m the address listed on the back page of this manual Send a check for 5 00 payable to DESA Heating Products ACCESSORIES Purchase this heater accessory from your local dealer If they cannot supply this accessory call DESA Heating Products at 1 866 672 6040 for referral information You can also write to the ad dress listed on the back page of this manual FUEL GAS CONNECTOR LPA4020 Connects regulator to all standard propane tanks ULL and A G A listed ELECTRONIC IGNITOR KIT GA435 Not Shown For all piezo ignitor models Provides easier lighting of the pilot REPLACEMENT PARTS Note Use only original replacement parts This will protect your warranty coverage for parts replaced 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 Department 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 referral information When calling DESA Heating Products have ready e model number o
25. on CONNECTING TO PERMANENT GAS SUPPLY AX 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 8 www desatech com 110373 01F INSTALLATION Continued Accaution Neverconnectheater directly to the propane LP supply This heater requires an external regulator not supplied Install the external regulator between the heater and propane LP supply Installation Items Before installing heater make sure you have the items listed below e 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 test gauge connection 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 17 If installing to a fixed fuel piping system the installation must conform with local codes or in the absence of local codes with the National Fuel Gas Code ANSI 2223 1 If the heater will be connected to a permanent gas source the installer must supply an external regulator The external regulator will reduce in coming gas pressur
26. ontact qualified service person 110373 01F www desatech com TROUBLESHOOTING Continued AA WARNING If you smell gas e Shut off gas supply e Do not try to light any appliance building low the gas supplier s instructions e Do not touch any electrical switch do not use any phone in your e Immediately call your gas supplier from a neighbor s phone Fol e 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 unwanted 1 Heater burning vapors from odors paint hair spray glues etc see IMPORTANT statement above 2 Low fuel supply 3 Gas leak See Warning statement above Heater shuts off in use ODS 1 Not enough fresh air is operates available 2 Low line pressure 3 ODS pilot is partially clogged L Ventilate room Stop using odor causing products while heater is running Refill supply tank Locate and correct all leaks see Checking Gas Connec tions for Permanent Gas Sup ply page 10 Open window and or door for ventilation Contact local propane LP gas company Clean ODS pilot see Cleaning and Maintenance page 13 Gas od
27. oreven whencontrolknob 1 Gas leak See Warning is in OFF position statement above 2 Control valve defective Locate and correct all leaks see Checking Gas Connec tions for Permanent Gas Sup ply page 10 Replace control valve Gas odor during combustion 1 Foreign matter between con trol valve and burner 2 Gas leak See Warning statement above Take apart gas tubing and remove foreign matter Locate and correct all leaks see Checking Gas Connec tions for Permanent Gas Sup ply page 10 Moisture condensation noticed 1 Not enough combustion ven on windows tilation air Provide more combustion area A minimum 10 square inches of ventilation air must be provided for adequate combustion 16 www desatech com 110373 01F STORAGE A CAUTION Disconnect heat er from propane LP supply tank s When the propane LP supply cylinder is not dis connected from the heater the heater and the cyl inder must be stored outdoors in a well ventilated space out of reach of children Do not store in a building garage or any other enclosed area Storage of the heater is permissible only if the cylinder is disconnected and removed from the heater Cylinders must be stored outdoors out of reach of children Do not store in a building garage or any other enclosed area 1 Store propane tank s in safe manner See Chapter 5 of Standard for Storage and Han dling of Liquefied P
28. rce or attempted repair may result in a fire or explosion D Do not use this appliance if any part has been under water Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water ME structions MM INSTRUCTIONS 1 STOP Read the safety information above 2 Make sure equipment shutoff valve is fully open 3 Turn off any electric power to the appliance if service is to be performed 4 Turn control knob clockwise N to the OFF position 5 Wait five 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 above If you don t smell gas go to the next step 6 Turn control knob counterclockwise gt to the PILOT position Press in control knob for five 5 seconds With control knob pressed in push down and release ignitor button This will light pilot The pilot is attached to the front of burner Note You may be running this heater for the first time after hooking up to gas supply If so you may need to press in control knob for 30 seconds or more This will allow air to bleed from the gas system If needed keep pressing ignitor button until pilot lights If ignitor does not light pilot refer to Troubleshooting page 14 or contact a qualified service person or gas supplier for repairs Until repairs are made light p
29. s for leaks Turn off heater see To Turn Off Gas to Appli ance page 12 Replace front panel Equipment Open Shutoff Valve Closed Figure 14 Equipment Shutoff Valve Control Valve Location WO UN 2 Equipment Shutoff Valve v Figure 15 Checking Gas Joints 10 www desatech com 110373 01F OPERATING HEATER H 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 e If you cannot reach your gas supplier call the fire department C 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 technician Fo
30. s supply piping system Pressures in excess of 1 2 psig will damage heater regulator 2 Cap off open end of gas pipe where equipment 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 Reconnect heater and 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 Ze 4 Close equipment shutoff valve see Figure 14 Pressurize supply piping system by either opening propane LP supply tank valve or using compressed air Check all joints from supply tank to equip ment shutoff valve see Figure 15 Apply a noncorrosive leak detection fluid to all joints Bubbles forming show a leak Correct all leaks at once PRESSURE TESTING HEATER GAS CONNECTIONS Propane LP AO Supply Open equipment shutoff valve see Figure 14 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 15 Apply a noncorrosive leak detection fluid to all joints Bubbles forming show a leak Correct all leaks at once Light heater see Lighting Instructions page 11 Check all other internal joint
31. sert bottom anchor screw through back panel into bottom anchor or drilled hole see Figure 9 Tighten screw until heater is firmly secured to wall Do not over tighten Note Do not replace front panel at this time Replace front panel after making gas connections and checking for leaks see pages 8 through 10 Figure 9 Installing Bottom Mounting Screw 110373 01F www desatech com T INSTALLATION Continued CONNECTING TO PORTABLE CYLINDER GAS SUPPLY AX WARNING Review and un derstand the warnings in the Safety Information section page 3 They are needed to safely op erate this heater Follow all local codes when using this heater WARNING Testall gas piping and connections for leaks after installation or servicing Never use an open flame to check for a leak Apply a noncorrosive leak detection fluid to all joints Bubbles forming show a leak Correct all leaks at once A WARNING Use pipe joint sealant that is resistant to liquid petroleum LP gas Never bring a refillable pro pane LP cylinder indoors A fire or explosion can occur causing property damage serious injury or death IMPORTANT You must use a propane LP gas supply cylinder that is compatible with the connec tion device provided with the hose and regulator 1 Remove 90 gas fitting from hardware bag 2 Apply pipe joint sealant lightly to male NPT threads see Figure 10 This will preven
32. ssageways of heater clean Inspect these areas of heater before each use Have heater inspected yearly by a qualified service person Ay CAUTION You must check and keep burner venturi tubes clean ofinsectandinsectnest A clogged tube can lead to a fire AX WARNING Failure to keep the primary air opening s of the burner s clean may resultin 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 burner tube and pilot assembly clean and free of dust and dirt To clean these parts we recommend using compressed air no greater than 30 PSI Your local computer store hardware store or home center may carry compressed air in a can If using compressed 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 Shut off the unit including the pilot Allow the unit to cool for at least thirty minutes 2 Inspect burner pilot
33. t excess sealant from going into pipe Excess sealant in pipe could result in clogged heater valves Hold gas pressure regulator with wrench when connecting the 90 gas fitting Do not over tighten connection to regulator The regulator body could be damaged 4 Provide propane LP supply system see Pro pane LP Supply page 5 5 Connect fuel gas fitting on hose regulator assem bly to propane LP tank s Turn fuel gas fitting counterclockwise into threads on tank Tighten firmly using a wrench IMPORTANT Position regulator so that hose leaving the regulator is in a horizontal position see Figure 11 This uy places the regulator vent in the proper position to protect it from the weather Connect hose to heater inlet Tighten firmly using a wrench You must use the regulator supplied with heater 7 Open propane LP supply valve on propane LP tank s slowly Note If not opened slowly excess flow check valve on propane LP tank may stop gas flow If this happens close pro pane LP supply valve and open again slowly 8 Check all connections for leaks Apply a noncor rosive leak detection fluid to gas joints Bubbles forming show a leak that must be corrected 9 Close propane LP supply valve Pressure Ly T Regulator Heater Cabinet Apply Sealant To This End Only gt oe Fitting Regulator Figure 10 Gas Connection Propane LP Regulator Supply Valve Figure 11 Regulator Positi
34. terymarch Park Quincy MA 02269 State of Massachusetts The installation must be made by a licensed plumber or gas fitter in the Commonwealth of Massachusetts Sellers of unvented propane or natural gas fired supplemental room heaters shall provide to each purchaser a copy of 527 CMR 30 upon sale of the unit Vent free gas products are prohibited for bed room and bathroom installation in the Com monwealth of Massachusetts 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 return to dealer where you bought heater PRODUCT FEATURES SAFETY PILOT This heater has a pilot with an Oxygen Deple tion Sensing ODS safety shutoff system The ODS pilot is a required feature for vent free room heaters The ODS pilot shuts off the heater if there is not enough fresh air PIEZO IGNITION SYSTEM This heater has a piezo ignitor This system re quires no matches batteries or other sources to light heater www desatech com 110373 01F PRODUCT IDENTIFICATION nna o CI Cabinet Front Panel Regulator Hose Figure 1 Vent Free Propane LP Gas Heater PROPANE LP SUPPLY Propane LP gas and propane LP tank s are to be furnished by the user The propane LP cylinder to be used must be constructed and marked in accordance with the specifications for the pro pane
35. the heater will shut down If pilot flame pattern is incorrect as shown in Figure 19 e turn heater off see To Turn Off Gas to Appliance e see Troubleshooting page 14 Pilot Burner Figure 19 Incorrect Pilot Flame Pattern BURNER FLAME PATTERN Figure 20 page 13 shows a correct burner flame pat tern Figure 21 page 13 shows an incorrect burner flame pattern The incorrect burner flame pattern shows yellow tipping of the flame It also shows the flame higher than 1 2 the glass panel height 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 If burner flame pattern is incorrect as shown in Figure 21 page 13 e turn heater off see To Turn Off Gas to Appliance e see Troubleshooting page 14 12 www desatech com 110373 01F INSPECTING HEATER Continued MADALAMA AAA AN i h f 1 2 GLASS HEIGHT Figure 20 Correct Burner Flame Pattern Yellow NIN YA fy s E A AMMAR Tera IIA i mm JU 1 2 GLASS HEIGHT Figure 21 Incorrect Burner Flame Pattern CLEANING AND MAINTENANCE R WARNING Turn off heater and let cool before cleaning A CAUTION You must keep control areas burner and circu lating air pa
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