Desa GWP30TA User's Manual
Contents
1. 24 www desatech com 119344 01B PARTS LIST This list contains replaceable parts used in your heater When ordering parts follow the instructions listed under Replacement Parts on page 23 of this manual KEY NO 1 2 3 10 11 12 13 14 15 16 a 18 ig 20 21 22 PART NO 097159 04 107673 01 107676 01 103476 01 103476 02 100047 07 100047 08 098522 11 098522 12 098522 13 098522 28 104189 01 104189 02 098260 09 098260 10 107894 14 107894 15 098271 09 098249 01 110803 01 110803 02 103446 02 103447 06 099387 03 099387 05 103845 05 103845 06 103845 07 103845 08 099066 02 099415 17 099415 18 NJF 8C 103570 04 103255 02 103572 03 103256 02 118721 04 l 118721 03 098354 02 098508 01 oe PARTS AVAILABLE NOT SHOWN mememe 110186 01 100642 03 DESCRIPTION Piezo Ignitor Front Panel _Front Panel _Grill Guard Grill Guard Gas Control Valve NG _Gas Control Valve LP Thermostat Gas Valve LP Thermostat Gas Valve NG Thermostat Gas Valve LP Thermostat Gas Valve NG Bottom Glass Retainer Bottom Glass Retainer i Glass Glass Cabinet Deflector Assembly Deflector Assembly Ignitor Cable Nut ODS Pilot Assembly ODS Pilot Assembly Burner Burner Pilot Tubing Pilot Tubing Injector Injector Injector Injector Mounting Bracket Gas Regula2. www desatech com 119344 01B 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 Naa 119344 01B This appliance has a pilot which must be lighted by hand When lighting the pi lot 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 ttry to repair it call a qualified service technician Force or attempted repair may result in a fire or explosion Do not use this appliance if any part has been under water Immediately call a 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 LIGHTING E INSTRUCTIONS STOP Read the safety information above Make sure equipment
3. 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 inspection and service e in coldest part of room An optional fan kit is available from your dealer See Accessories page 26 If planning to use fan locate heater near an electrical outlet CEILING 6 Min Minimum oo From Left Side Minimum To Top Surface Of Carpeting Tile Or Other Combustible Material Figure 4 Mounting Clearances As Viewed From Front of Heater 8 www desatech com 119344 01B INSTALLATION Continued THERMOSTAT SENSING BULB Thermostat Models Only The thermostat sensing bulb has been placed below the heater 1 Place clamp on thermostat sensing bulb as shown in Figure 5 Clamp is provided in hardware 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 thermostat sensing bulb is point ing up Thermostat Sensing Bulb Figure 5 Attaching Thermostat Sensing Bulb INSTALLING HEATER TO WALL Mounting Bracket Locate mounting bracket in heater carton Re move mounting bracket from heater carton Figure 6 Mounting Bracket Removing Front Panel Of Heater 1 Remove the four painted screws t
4. Example Space size 20 ft length x 16 ft width x 8 ft ceiling height 2560 cu ft volume of space If additional ventilation to adjoining room is supplied with grills or openings add the volume of these rooms to the total volume of the space 2 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 3 Add the Btu Hr of all fuel burning appliances in the space cu ft Vent free heater Btu Hr Gas water heater Btu Hr Gas furnace Btu Hr Vented gas heater Btu Hr Gas fireplace logs Btu Hr Other gas appliances Btu Hr Total Btu Hr Do not include direct vent gas appliances Direct vent draws combustion air from the outdoors and vents to the outdoors 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 can support Btu Hr actual amount used Example 51 200 Btu Hr maximum the space can support 60 000 Btu Hr actual amount of Btu Hr used The space in the above example is a confined space because the actual Btu Hr used is more than the maximum Btu Hr the space can sup port You must provide additional fresh air Your options are as follows A Rework works
5. Follow the gas supplier s instructions eif you cannot reach your gas supplier call the fire department This heater needs fresh outside air ventila tion to run properly This heater has an Oxy gen Depletion Sensing ODS safety shutoff system The ODS shuts down the heater if not enough fresh air is available See Air for Combustion and Ventilation page 5 Keep all air openings in front and bottom of heater clear and free of debris This will insure enough air for proper combustion If heater shuts off do not relight until you provide fresh outside air If heater keeps shutting off have it serviced Do not run heater e where flammable liquids or vapors are used or stored e under dusty conditions 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 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 119344 01B www desatech com 3 SAFETY INFORMATION Continued 12 Operating heater above elevations of 4 500 feet could cause pilot outage 13 To prevent
6. 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 heater Follow all local codes CHECK GAS TYPE Use only the correct type of gas natural or propane LP If your gas supply is not the correct gas type do not install heater Call dealer where you bought heater for proper type heater 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 AX WARNING This appliance is equipped for natural or pro pane LP gas Field conversion is not permitted 119344 01B www desatech com v INSTALLATION Continued INSTALLATION ITEMS Before installing heater make sure you have the items listed below e for propane LP gas external regulator supplied by installer piping check local codes e sealant resistant to propane LP gas equipment shutoff valve e ground joint union sediment trap e tee joint e pipe wrench e for natural gas test gauge connection A CSA design certified equipment shutoff valve with 1 8 NPT tap is an acceptable alter native to test gauge connection The optional CSA design certified equipment shutoff valve can be purchased from your dealer See Ac cessori
7. PROBLEM POSSIBLE CAUSE 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 REMEDY When ignitor button is pressed there is no spark at ODS pilot all Ignitor electrode positioned wrong Ignitor electrode broken Ignitor electrode not con nected to ignitor cable ignitor cable pinched or wet Broken ignitor cable Bad piezo ignitor 1 Replace pilot assembly Replace pilot assembly Reconnect ignitor cable Free ignitor cable if pinched by any metal or tubing Keep ignitor cable dry Replace ignitor cable Replace piezo ignitor When ignitor button is pressed there is spark at ODS pilot but no ignition Gas supply turned off or equipment shutoff valve closed Control knob not in PILOT position Control knob not pressed in while in PILOT position Air in gas lines when in stalled Depleted gas supply pro pane LP gas only ODS pilot is clogged 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 control knob Repeat ignit ing operation until air is removed Contact local propane LP gas company Clean ODS pilot see Clean ing and Maintenance page 18
8. Section 5 3 Air for Com bustion and Ventilation for required size of ventilation grills or ducts Ventilation Grills Ventilation Into Soe Grills into Or I Adjoining Remove Room Door into Option 1 Adjoining Room Option 3 Oo Figure 2 Ventilation Air from Inside Building Ventilation Air From Outdoors Provide extra fresh air by using ventilation grills or ducts You must provide two perma nent openings one within 12 of the ceiling and one within 12 of the floor Connect these items directly to the outdoors or spaces open to the outdoors These spaces include attics and crawl spaces Follow the National Fuel Gas Code ANSI Z223 1 NFPA 54 Section 5 3 Air for Combustion and Ventilation for required size of ventilation grills or ducts IMPORTANT Do not provide openings for inlet or outlet air into attic if attic has a thermo stat controlled power vent Heated air entering the attic will activate the power vent Outlet Ventilated Air N L Outlet To Attic To Crawl Space Inlet a Air i Ventilated Inlet Air ce 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
9. flame pattern and burner flame pattern often PILOT FLAME PATTERN Figure 22 shows a correct pilot flame pattern Figure 23 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 If pilot flame pattern is incorrect as shown in Figure 23 e turn heater off see To Turn Off Gas to Ap pliance page 16 see Troubleshooting page 19 Note The pilot flame on natural gas units will have a slight curve but flame should be blue and have no yellow or orange color Thermocouple Blue Flame Q Pilot Burner Figure 22 Correct Pilot Flame Pattern Thermocouple Yellow Flame BURNER FLAME PATTERN A WARNING If yellow tipping occurs your heater could pro duce increased levels of carbon monoxide NOTICE Do not mistake orange flames with yellow tipping Dirt or other fine particles enter the heater and burn causing brief patches of orange flame Figure 24 shows a correct burner flame pat tern Figure 25 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 If burner flame pattern is incorrect as shown in Figure 25 e turn heater off see To Turn Off Gas To Appliance page 16 e see Troubleshooting page 19 B
10. generates chemicals known to the State of California to cause cancer or birth defects or other reproductive harm IMPORTANT Read this owner s manual carefully and completely before trying to assemble operate or service this heater Improper use of this heater can cause serious injury or death from burns fire explosion electrical shock and carbon monoxide poisoning AX DANGER Carbon monoxide poisoning may lead to death Carbon Monoxide Poisoning Early signs of car bon monoxide poisoning resemble the flu with headaches dizziness or nausea If you have these signs the heater may not be working properly Get fresh air at once Have heater serviced Some people are more affected by carbon monoxide than others These include pregnant women people with heart or lung disease or anemia those under the influence of alcohol and those at high altitudes 119344 01B SAFETY INFORMATION Continued Natural and Propane LP Gas Natural and pro pane LP gases are fuel gases 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 warnings Keep this manual for reference It is your guide to safe and proper operation of this heater A WARNING Any change to this heater or its controls can be dangerous A
11. or replace ODS pilot assembly Replace gas regulator 119344 01B www desatech com OBSERVED PROBLEM Continued POSSIBLE CAUSE TROUBLESHOOTING REMEDY ODS pilot lights but flame goes out when control knob is released 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 open Thermocouple connection loose at control valve Pilot flame not touching thermocouple which al lows 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 1 2 Press in control knob fully After ODS pilot lights keep control knob pressed in 30 seconds Wait one minute for safety interlock system to reset Repeat ignition operation Fully open equipment shut off valve Hand tighten until snug then tighten 1 4 turn more A Contact local natural or propane LP gas company B Clean ODS pilot see Cleaning and Maintenance page 18 or replace ODS pilot assembly 7 Thermocouple damaged 7 Replace pilot assembly 8 Control valve damaged 8 Replace control valve Burner does not light after 1 Burner orifice is clogged 1 Clean burner see Cleaning ODS pilot is lit and Maintenance page 18 or replace burner orifice 2 Inlet gas pressure
12. shutoff valve is fully open Turn off any electric power to the appli ance if service is to be performed Turn control knob clockwise to the OFF position 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 Thermostat Models Turn control knob counterclockwise to the PILOT position Press in control knob for five 5 seconds Manual Models Press in and turn control knob counterclockwise to the PI LOT position Keep control knob pressed in 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 re fer to Troubleshooting page 19 or contact a qualified service person or gas supplier for repairs Until repairs are made light pilot with match To light pilot with match see Manual Lighting Procedure page 16 Keep control knob pressed in for 30 sec onds after lighting pilot After 30 seconds release control knob e If control knob does not pop up
13. when released 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 inter lock system Wait one 1 minute before lighting pilot again Turn control knob counterclockwise to desired heating level The main burner should light Manual control heaters should be used in locked positions Ignitor Button Control Knob hk Seer A O SX IGNITOR Figure 19 Control Knob In The OFF Position Manual Control Models Control Knob Ignitor Button Figure 20 Control Knob In The OFF Position Thermostat Models www desatech com 15 OPERATING HEATER Continued Ay WARNING Always operate manual control heaters at the locked positions Operation between these positions may create a possible health hazard if used in a poorly ventilated room Read owner s manual for complete instructions Ad CAUTION Do not try to ad just heating levels by using the equipment shutoff valve Thermocouple Ignitor Electrode Pilot Burner Figure 21 Pilot actual pilot may vary al 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 a THERMOSTAT CONTROL OPERATION The ther
14. www desatech com 119344 01B SPECIFICATIONS WMN20A GWN20TA e Btu Variable 10 000 20 000 Btu Hr e Type Gas Natural Only e Ignition Piezo e Pressure Regulator Setting 3 W C e Inlet Gas Pressure in of water Maximum 10 5 Minimum 4 GWN30TA e Btu Variable 15 000 30 000 Btu Hr e Type Gas Natural Only e Ignition Piezo e Pressure Regulator Setting 3 W C e Inlet Gas Pressure in of water Maximum 10 5 Minimum 4 WMP20A GWP20TA e Btu Variable 10 000 20 000 Btu Hr Type Gas Propane LP Only e Ignition Piezo e Pressure Regulator Setting 8 W C e Inlet Gas Pressure in of water Maximum 14 Minimum 11 GWP30TA e Btu Variable 15 000 30 000 Btu Hr Type Gas Propane LP Only e Ignition Piezo e Pressure Regulator Setting 8 W C e Inlet Gas Pressure in of water Maximum 14 Minimum 11 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 natural or propane LP gas supplier 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 Heati
15. DESA INDOOR OUTDOOR PRODUCTS UNVENTED VENT FREE BLUE FLAME GAS HEATER SAFETY INFORMATION AND INSTALLATION MANUAL We recommend that our products be installed and o MODELS GWN20TA GWP20TA GWN30TA GWP30TA WMN20A WMP20A 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 supplier from 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 Information assina ieee Local COD SS 2 cxis tic edseeestecesgeteasceascneeyivens tasageees Product Identification 0eccceceeeeeeeeeeeeeeeeteeeee 4 Wit PACKING aene ra oei yi Aegpeetes 4 Product FOAtureS srr 4 Air For Combustion And Ventilation 0 5 Ins talllatiom e O EE A 7 Operating He
16. 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 volume is less than 50 cubic feet per 1 000 Btu per hour 4 8 m per kw of the ag gregate input rating of all appliances installed in that space and an unconfined 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 appliances installed in that space Rooms communicating directly with the space in which the appliances are installed through openings not furnished with doors are considered a part of the un confined space Adjoining rooms are communicating only if there are doorless passageways or ventilation grills between them 119344 01B 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 confined or unconfined space Space Includes the room in which you will install heater plus any adjoining rooms with doorless passageways 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
17. X WARNING Do not use a blower insert heat exchanger insert or other accessory not ap proved for use with this heater Due to high temperatures the appliance should be located out of traffic and away from furniture and draperies Do not place clothing or other flammable material on or near the appliance Never place any objects on the heater Surface of heater becomes very hot when running heater Keep children and adults away from hot surface to avoid burns or clothing ignition Heater will remain hot for a time after shut down Allow surface to cool before touching Carefully supervise young chil dren when they are in the same room with heater Make sure grill guard is in place before running heater Keep the appliance area clear and free from combustible ma terials gasoline and other flam mable vapors and liquids ls 10 11 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 Do not place propane LP supply tank s inside 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 e do not touch any electrical switch do not use any phone in your building e immediately call your gas supplier from a neighbor s phone
18. air and create odors OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Heater produces unwanted 1 odors Heater burning vapors from paint hair spray glues etc see IMPORTANT state ment above Low fuel supply propane LP gas only Gas leak See Warning statement above 1 Ventilate room Stop us ing odor causing products while heater is running 2 Refill supply tank 3 Locate and correct all leaks see Checking Gas Con nections page 13 Heater shuts off in use ODS 1 operates Not enough fresh air is available Low line pressure ODS pilot is partially clogged 1 Open window and or door for ventilation 2 Contact local natural or propane LP gas company 3 Clean ODS pilot see Cleaning and Maintenance page 18 Gas odor even when control 1 knob is in OFF position Gas leak See Warning statement above Control valve defective 1 Locate and correct all leaks see Checking Gas Con nections page 13 2 Replace control valve Gas odor during combustion 1 Foreign matter between control valve and burner Gas leak See Warning statement above 1 Take apart gas tubing and remove foreign matter 2 Locate and correct all leaks see Checking Gas Con nections page 13 Moisture condensation no ticed on windows 1 Not enough combustion ventilation air 1 Refer to Air for Combustion and Ventilation require ments page 5 22
19. ater Inspecting Heater Cleaning and Maintenance 18 SAFETY INFORMATION WARNING Improper in stallation adjustment al teration service or mainte nance can cause injury or property damage Refer to this manual for correct in stallation and operational procedures For assis tance or additional infor mation consult a qualified installer service agency or the gas supplier WARNING This is an unvented gas fired heater It uses air oxygen fromthe roomin which itis installed Provisions for adequate combustion and ventila tion air must be provided Refer to Air for Combustion and Ventilation section on page 5 of this manual 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 www desatech com TROUBIGSHOOUING ane aa 19 Specifications Service Hints Replacement Parts Technical Service Service Publications eccceeeceeeeeeeeeneeeeees 23 Illustrated Parts Breakdown and Parts List 24 ACCESSES iaa a aaa aia dadaa Parts Centrals Warranty Information This appliance may be in stalled in an aftermarket permanently located manufactured mobile home where not prohib ited by local codes Aftermarket Completion of sale not for purpose of resale from the manufacturer WARNING This productcon tains and or
20. emove tape and mounting bracket from wall 12 30 4 14 35 6 cm cm hoooeocc0c0o0000 Min A Only Insert Mounting 18 3 4 Screws Through Last 47 6 cm Hole On Each End Min 4g Floor i 30 000 Btu Hr Models L 8 14 35 6 cm 20 3 cm AE EP R o E E Min a Only Insert Mounting 18 3 4 g Screws Through Last 47 6 cm Hole On Each End Min 2 Floor 20 000 Btu Hr Models Figure 8 Mounting Bracket Clearances Attaching Mounting Bracket To Wall Note Wall anchors mounting screws and spacers are in hardware package The hard ware package is provided with heater Attaching To Wall Stud Method For attaching mounting bracket to wall studs 1 Drill holes at marked locations 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 2 Fold wall anchor as shown in Figure 9 3 Insert wall anchor wings first into hole Tap anchor flush to wall 4 For thin walls 1 2 or less
21. es page 26 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 need ed Purchase the floor mounting stand from your dealer See Accessories page 26 AA WARNING Never install the heater e in a bedroom or bathroom e in a recreational vehicle e where curtains furniture clothing or other flammable objects are 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 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 Ventila tion page 5 If high humidity is experienced a dehumidifier may be used to help lower the water vapor content in the air
22. heet adding the space of an adjoining room If the extra space provides an unconfined space remove door to adjoin ing room or add ventilation grills between rooms See Ventilation Air From Inside Building page 7 B Vent room directly to the outdoors See Ventilation Air From Outdoors page 7 C Install a lower Btu Hr heater if lower Btu Hr size makes room unconfined If the actual Btu Hr used is less than the maximum Btu Hr the space can support the space is an unconfined space You will need no additional fresh air ventilation 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 6 www desatech com 119344 01B AIR FOR COMBUSTION AND VENTILATION Continued VENTILATION AIR Ventilation Air From Inside Building This fresh air would come from an adjoining unconfined space When ventilating to an adjoining unconfined space you must provide two permanent 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
23. hese 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 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 v
24. in wood floors If mounting base to a concrete floor drill with 1 4 diameter concrete drill bit 13 8 into floor Insert anchors completely into holes Reposition heater with base feet over holes Secure base to floor with wood screws See Figure 13 119344 01B www desatech com 11 INSTALLATION Continued CONNECTING TO GAS SUPPLY AX WARNING This appliance requires a 3 8 NPT National Pipe Thread inlet connection to the pressure regulator A WARNING A qualified ser vice person must connect heater to gas supply Follow all local codes A WARNING For natural gas never connect heater to private non utility gas wells This gas is commonly known as wellhead gas IMPORTANT For natural gas check gas line pressure before connecting heater to gas line Gas line pressure must be no greater than 10 5 of water If gas line pressure is higher heater regulator damage could occur AX CAUTION For propane LP gas never connectheater directly to the propane LP supply This heater requires an external regu lator not supplied Install the external regulator between the heater and propane LP supply For propane LP gas the installer must supply an external regulator The external regulator will reduce incoming gas pressure You must reduce incoming gas pressure to between 11 and 14 of water If you do not reduce incom ing gas pressure heater regulator damage could occur In
25. insert red key into wall anchor Push red key to pop open anchor wings IMPORTANT Do not ham mer key For thick walls over 1 2 thick or solid walls do not pop open wings 5 Place mounting bracket onto wall Line up last hole on each end of bracket with wall anchors 6 Insert mounting screws through bracket and into wall anchors 7 Tighten screws until mounting bracket is firmly fastened to wall sA XQ Figure 9 Folding Figure 10 Popping Anchor Open Anchor Wings For Thin Walls Placing Heater On Mounting Bracket 1 Locate two horizontal slots on back panel of heater 2 Place heater onto mounting bracket Slide horizontal slots onto stand out tabs on mounting bracket Horizontal Slots Mounting Bracket attached to wall Figure 11 Mounting Heater Onto Mounting Bracket 10 www desatech com 119344 01B INSTALLATION Continued Installing Bottom Mounting Screws 1 o 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 hollow or solid wall install wall anchors Follow steps 1 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 betwee
26. is too 2 Contact local natural or low propane LP gas company Delayed ignition of burner 1 Manifold pressure is too 1 Contact local natural or low propane LP gas company 2 Burner orifice is clogged 2 Clean burner see Cleaning and Maintenance page 18 or replace burner orifice Burner backfiring during com 1 Burner orifice is clogged or 1 Clean burner see Cleaning bustion damaged and Maintenance page 18 or replace burner orifice 2 Burner damaged 2 Replace burner 3 Gas regulator defective 3 Replace gas regulator 20 www desatech com 119344 01B TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE Yellow flame during burner 1 combustion Not enough air Gas regulator defective Clogged or dirty burner REMEDY Al 2 3 Check burner for dirt and debris If found clean burner see Cleaning and Maintenance page 18 Replace gas regulator Clean burner see Cleaning and Maintenance page 18 Slight smoke or odor during 1 initial operation Residues from manufactur ing processes Problem will stop after a few hours of operation Heater produces a whistling 1 noise when burner is lit Turning control knob to 5 position when burner is cold Air in gas line Air passageways on heater blocked Dirty or partially clogged burner orifice Turn control knob to 1 posi tion and let warm up for a minute Operate burner until air is removed f
27. lue Flame DADAAMIA AI AO DAMIAN AE anainn ec L Height Figure 24 Correct Burner Flame Pattern Yellow Tipping Pilot J lt Burner 1 2 Glass Height Figure 25 Incorrect Burner Flame Pattern Figure 23 Incorrect Pilot Flame Pattern 119344 01B www desatech com 17 CLEANING AND MAINTENANCE A WARNING Turn off heater and let cool before cleaning A CAUTION You must keep control areas burner and circu lating air passageways of heater clean Inspect these areas of heater before each use Have heater inspected yearly by a qualified service person Heater may need more frequent clean ing due to excessive lint from carpeting bedding material pet hair etc 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 pro vides 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 as
28. me to check for a leak Apply anoncorrosive leak detec tion fluid to all joints Bubbles forming show a leak Correct all leaks at once Ay CAUTION For propane LP gas make sure external regula tor has been installed between propane LP supply and heater See guidelines under Connect ing to Gas Supply page 12 PRESSURE TESTING GAS SUPPLY PIPING SYSTEM Test Pressures In Excess Of 1 2 PSIG 3 5 kPa 1 Disconnect appliance with its appliance main gas valve control valve and equip ment shutoff valve from gas supply piping system Pressures in excess of 1 2 psig will damage heater regulator Cap off open end of gas pipe where equip ment shutoff valve was connected Pressurize supply piping system by either opening propane LP supply tank valve for propane LP gas or opening main gas valve located on or near gas meter for natural gas or using compressed air Check all joints of gas supply piping system Apply a noncorrosive leak detection fluid to all joints Bubbles forming show a leak Correct all leaks at once Reconnect heater and equipment shutoff valve to gas supply Check reconnected fittings for leaks Test Pressures Equal To or Less Than 1 2 PSIG 3 5 kPa f Equipment Shutoff Valve Close equipment shutoff valve see Fig ure 16 Pressurize supply piping system by either opening propane LP supply tank valve for propane LP gas or opening main gas valve located on or near gas meter for na
29. mostatic control used on these models differs from standard thermostats Standard thermostats simply turn on and off the burner The thermostat used on this heater senses the room temperature The thermostat adjusts the amount of gas flow to the burner This increases or decreases the burner flame height At times the room may exceed the set temperature If so the burner will shut off The burner will cycle back on when room temperature drops below the set temperature The control knob can be set to any heat level between 1 and 5 Selecting the 5 setting will cause the burner to remain fully on without modulating down in most cases Note The thermostat sensing bulb mea sures 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 MANUAL LIGHTING PROCEDURE 1 Remove front panel see Figure 7 page 9 2 Follow steps 1 through 7 under Lighting Instructions page 15 3 With control knob pressed in strike match Hold match to pilot until pilot lights 4 Keep control knob pressed in for 30 sec onds after lighting pilot After 30 seconds release control knob Now follow step 9 under Lighting Instructions page 15 5 Replace front panel 16 www desatech com 119344 01B INSPECTING HEATER Check pilot
30. n 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 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 12 through 14 Heater wall Spacer Side View Figure 12 Installing Bottom Mounting Screws MOUNTING HEATER TO FLOOR WITH OPTIONAL FLOOR KIT Mounting Base Feet to Heater 1 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 ap Base Foot A l Sheet Metal Screw Figure 13 Installing Base Feet Mounting Base Feet to Floor f Remove front panel see Removing Front Panel of Heater page 9 Position heater with base feet in desired location Mark holes for drilling Remove heater with base For carpeted floors make a small cut with a sharp knife at marked locations prior to drilling If mounting base to a wood floor drill 1 8 diameter hole 3 4 deep Do not use anchors
31. ng Products Technical Ser vice Department at 1 866 672 6040 When calling DESA Heating Products have ready your name your address model and serial numbers of your heater e how heater was malfunctioning e type of gas used propane LP or natural gas purchase date Usually we will ask you to return the part to the factory PARTS NOT UNDER WARRANTY Contact authorized dealers of this product If they can t supply original replacement part s either contact your nearest Parts Central see page 27 or call DESA Heating Products at 1 866 672 6040 for referral information When calling DESA Heating Products have ready model number of your heater e the replacement part number TECHNICAL SERVICE You may have further questions about instal lation 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 Heat ing Products 119344 01B www desatech com 23 ILLUSTRATED PARTS BREAKDOWN MODELS WMN20A WMP20A GWN20TA GWP20TA GWN30TA AND GWP30TA Manual Control Models Only Thermostat Models Only
32. oids 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 INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FORA 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 FORANY OTHER DAMAGES WHATSOEVER 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 o
33. performance problems do not use propane LP fuel tank of less than 100 Ibs capacity 14 Provide adequate clearances around air openings 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 Batterymarch Park Quincy MA 02269 State of Massachusetts The installation must be made by a licensed plumber or gas fitter in the Commonwealth of Mas sachusetts 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 bedroom and bathroom installation in the Commonwealth 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 inform dealer where you bought heater PRODUCT IDENTIFICATION Control Knob Ignitor Button Heater Cabinet Grill Guard Glass Panel Front Panel Figure 1 Vent Free Gas Heater PRODUCT FEATURES SAFETY DEVICE This heater has a pilot with an Oxygen Deple tion Sensing ODS safety shutoff system The ODS pilot is a required feature for
34. rivately owned businesses They have agreed to support our customer s needs by providing original replacement parts and accessories Tool amp Equipment Co 5 Manila Ave Hamden CT 06514 0322 1 800 397 7553 203 248 7553 Portable Heater Parts 342 N County Rd 400 East Valparaiso IN 46383 9704 219 462 7441 1 888 619 7060 www portableheaterparts com sales portableheaterparts com techservice portableheaterparts com FBD 1349 Adams Street Bowling Green KY 42103 3414 270 846 1199 1 800 654 8534 Fax 1 800 846 0090 franktalk aol com Master Parts Dist 1251 Mound Ave NW Grand Rapids MI 49504 2672 616 791 0505 1 800 446 1446 www nbmc com Washer Equipment Co 1715 Main Street Kansas City MO 64108 2195 KS MO AR 816 842 3911 www washerparts com East Coast Energy 707 Broadway W Long Branch NJ 07764 1501 732 870 8809 1 800 755 8809 www njplaza com ecep 21st Century 2950 Fretz Valley Perkasie PA 18944 4034 215 795 0400 800 325 4828 Laporte s Parts amp Service 2444 N 5th Street Hartsville SC 29550 7704 843 332 0191 Parts Department Cans Unlimited P O Box 645 Taylor SC 29687 0013 803 879 3009 1 800 845 5301 cuisales aol com 119344 01B www desatech com 27 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 t
35. rom line Have gas line checked by local natural or propane LP gas company Observe minimum installa tion clearances see Figure 4 page 8 Clean burner see Cleaning and Maintenance page 18 or replace burner orifice White powder residue forming 1 within burner box or on adja cent walls or furniture When heated vapors from furniture polish wax carpet cleaners etc may turn into white powder residue Turn heater off when us ing furniture polish wax carpet cleaners or similar products Heater produces a clicking 1 ticking noise just after burner is lit or shut off Metal expanding while heat ing or contracting while cooling This is normal with most heaters If noise is exces sive contact qualified ser vice person 119344 01B www desatech com 21 TROUBLESHOOTING Continued e Shut off gas suppl building y AA WARNING If you smell gas e Do not try to light any appliance 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 low the gas supplier s instructions e If you cannot reach your gas supplier call the fire department IMPORTANT Operating heater where impurities in air exist may create odors Cleaning sup plies paint paint remover cigarette smoke cements and glues new carpet or textiles etc create fumes These fumes may mix with combustion
36. sembly 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 dam age the pilot assembly 1 Shut off the unit including the pilot Allow the unit to cool for at least thirty min utes 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 assembly There is a small pilot air inlet about two inches from where the pilot flame comes out of the pilot assembly see Figure 26 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 26 Pilot Inlet Air Propane LP Pilot Shown 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 re move dust 18 www desatech com 119344 01B TROUBLESHOOTING WARNING Turn off and unplug heater and let cool before servicing Only a qualified service person should service and repair heater OBSERVED
37. stall the external regulator with the vent pointing down as shown in Figure 14 Pointing the vent down protects it from freezing rain or sleet A CAUTION Use only new black iron or steel pipe Inter nally tinned copper tubing may be used in certain areas Check your local codes Use pipe of large enough diameter to allow proper gas volume to heater If pipe is too small undue loss of volume will occur Typical Inlet Pipe Diameters 20 000 Btu Hr Models 3 8 or greater 30 000 Btu Hr Models 1 2 or greater Installation must include equipment shutoff valve union 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 15 page 13 IMPORTANT Install an equipment shutoff valve in an accessible location The equip ment 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 Install sediment trap in supply line as shown in Figure 15 page 13 Locate sediment trap where it is within reach for cleaning Locate sediment trap where trapped matter is not likely to freeze A sediment trap traps mois ture and contaminants This keeps them from going into heater controls If sediment
38. t provide adequate fresh air for these appliances This will insure proper venting of vented fuel burning appli ances PROVIDING ADEQUATE VENTILATION The following are excerpts from National Fuel Gas Code ANSI Z223 1 NFPA 54 Section 5 3 Air for Combustion and Ventilation All spaces in homes fall into one of the three following ventilation classifications 1 Unusually Tight Construction 2 Unconfined Space 3 Confined Space The information on pages 5 through 7 will help you Classify your space and provide adequate ventilation Unusually Tight Construction The air that leaks around doors and windows may provide enough fresh air for combustion and ventilation However in buildings of un usually tight construction you must provide additional fresh air Unusually tight construction is defined as construction where a walls and ceilings exposed to the outside 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 areas such as joints around window and door frames between sole plates and floors between wall ceiling joints between wall panels at penetrations for plumbing electrical and gas lines and at other open ings If your home meets all of the three criteria above you must provide additional fresh air
39. ther rights that vary from state to state For information about this warranty write D ESA INDOOR OUTDOOR PRODUCTS 2701 Industrial Drive P O Box 90004 Bowling Green KY 42102 9004 www desatech com 119344 01 Rev B 119344 01 05 06 NOT A UPC
40. tor Gas Regulator Hex Nut Outlet Tubing Outlet Tubing Inlet Tubing Inlet Tubing Baffle Baffle Control Knob Valve Retainer Nut Thermocouple Kit Hardware Assembly 107888 01 Control Position Label 117103 03 Lighting Instruction Booklet Not a field replaceable part a 8 8 O O ee ee 1 1 1 1 119344 01B www desatech com 25 ACCESSORIES Purchase these heater accessories from your local dealer If they can not supply these acces sories either contact your nearest Parts Central see page 27 or call DESA Heating Products at 1 866 672 6040 for referral information You can also write to the address listed on the back page of this manual BASE KIT GA4550 FQUIPMENTSHUTOFE VALVE Accessory for G models standard for GA5010 i W models For locating heater on the floor For all models Equipment shutoff valve with away from a wall Complete installation and 1 8 NPT tap operating instructions included ELECTRONIC IGNITOR KIT GA435 Not Shown For all piezo ignitor models Provides easier lighting of the pilot e FAN KITS PP100 For all models Provides better heat distri bution Makes heater more efficient Com plete installation and operating instructions included Thermostatically controlled blower turns itself on and off as required 26 www desatech com 119344 01B PARTS CENTRALS These Parts Centrals are p
41. trap is not installed or is installed wrong heater may not run properly Propane LP Supply Tank External Regulator Vent Pointing Down b yates Oe Figure 14 External Regulator With Vent Pointing Down 12 www desatech com 119344 01B INSTALLATION Continued IMPORTANT Hold the pressure regulator with wrench when connecting it to gas pip ing and or fittings Do not over tighten pipe connection to regulator The regulator body could be damaged Pressure Heater Regulator ILI Cabinet 3 8 NPT Pipe Nipple us 7S lt S amp TO Ground Joint S i 3 Tee Joint Aap Reducer ce D Shutoff Bushing to amp 4 Valve D 1 8 NPT g 18 NPT gt z Plug Tap Z Natural Gas Tee vont ELT Min ae Pipe ws 4 W C to Nipple 10 5 W C Pressure Cap Propane LP From External Regulator 11 W C to 14 W C Pressure Figure 15 Gas Connection A CSA design certified equipment shutoff valve with 1 8 NPT tap is an acceptable al ternative to test gauge connection Purchase the optional CSA design certified equipment shutoff valve from your dealer See Acces sories page 26 CHECKING GAS CONNECTIONS Sediment Trap WARNING Testall gas piping and connections internal and external to unit for leaks after installing or servicing Correct all leaks at once AX WARNING Never use an open fla
42. tural gas or using compressed air m Open NY Closed Figure 16 Equipment Shutoff Valve 119344 01B www desatech com 13 4 INSTALLATION Continued Check all joints from gas meter for natural gas see Figure 17 or propane LP supply tank for propane LP gas to equipment shutoff valve see Figure 18 Apply a noncorrosive leak detection fluid to all joints Bubbles forming show a leak Correct all leaks at once PRESSURE TESTING HEATER GAS CONNECTIONS Al 2 Open equipment shutoff valve see Figure 16 page 13 For natural gas open main gas valve located on or near gas meter For pro pane LP gas 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 or 18 Apply a noncorrosive leak de tection fluid to all joints Bubbles forming show a leak Correct all leaks at once Light heater see Operating Heater start ing on page 15 Check all other internal joints for leaks Turn off heater see To Turn Off Gas to Appliance page 16 Replace front panel Thermostat Gas Valve Equipment Shutoff Valve Figure 17 Checking Gas Joints for Natural Gas Thermostat Gas Valve Propane LP_ v Supply Tank 7 Equipment Shutoff Valve Figure 18 Checking Gas Joints for Propane LP Gas
43. 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 THERMOSTATIC HEAT CONTROL Thermostat models have a thermostat sens ing bulb and a control valve This results in the greatest heater comfort This can also result in lower gas bills 4 www desatech com 119344 01B AIR FOR COMBUSTION AND VENTILATION AX 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 insure proper fresh air for this and other fuel burning appliances 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 Dur ing heating months home owners want their homes as airtight as possible While it is good to make your home energy efficient your home needs to breathe Fresh air must enter your home All fuel burning ap pliances 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 mus
44. wo on each side of front panel 2 Pull bottom of front panel forward then out 3 Remove any remaining packaging ma terials Front Panel n oo LLTI ii 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 apart from their centers Attach mounting bracket to wall in one of two ways 1 Attaching to wall stud 2 Attaching to wall anchor Attaching to Wall Stud This method 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 Either 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 mount ing bracket is level Ay WARNING Maintain mini mum clearances shownin Figure 8 page 10 If you can provide greater clearances from floor and joining wall 119344 01B 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 R
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