Desa Tech CGN20T Electric Heater User Manual
Contents
1. CHECKING A WARNING GAS Test all gas piping and connections for leaks after installation or CONNECTIONS servicing Correct all leaks at once A WARNING Never use an open flame to check for a leak Apply a mixture of liquid soap and water to all joints Bubbles forming show a leak Correct all leaks at once PRESSURE TESTING GAS SUPPLY PIPING SYSTEM Test Pressures In Excess Of 1 2 PSIG 1 Disconnect heater and its individual manual shutoff valve from gas supply piping system Pressures in excess of 1 2 psig will damage heater regulator 2 Cap off open end of gas pipe where manual shutoff valve was connected 3 Pressurize supply piping system by either using compressed air or Opening main gas valve located on or near gas meter Continued 15 103873 CHECKING GAS CONNECTIONS Continued 4 5 Check all joints of gas supply piping system Apply mixture of liquid soap and water to gas joints Bubbles forming show a leak Correct all leaks at once Test Pressures Equal To or Less Than 1 2 PSIG 1 2 3 4 Close manual shutoff valve see Figure 14 Pressurize supply piping system by either using compressed air or opening main gas valve located on or near gas meter Check all joints from gas meter to manual shutoff valve see Figure 15 Apply mixture of liquid soap and water to gas joints Bubbles forming show a leak Correct all leaks at once PRESSURE TESTING2. clothing or other flammable objects are less than 36 inches from the front top or sides of the heater as a fireplace insert e in high traffic areas e in windy or drafty areas CAUTION This heater creates warm air currents These currents move heat to wall surfaces next to heater Installing heater next to vinyl or cloth wall coverings or operating heater where impurities in the air such as tobacco smoke exist may discolor walls 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 Fresh Air for Combustion and Ventilation pages 5 through 8 Continued 9 103873 INSTALLING TO WALL Continued CAUTION If you install the heater in a home garage e heater pilot and burner must be at least 18 inches 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 30 If plan ning to use fan locate heater near an electrical outlet re rs ___ CEILING Minimum Right Side 3 Minimum To Top Surface I Of Carpeting Tile Or Other Combustible Material FLOOR Figure 4 Mounting Clearances As
3. HEATER GAS CONNECTIONS TO n pa an Open manual shutoff valve see Figure 14 Open main gas valve located on or near gas meter Make sure control knob of heater is in the OFF position Check all joints from manual shutoff valve to thermostat gas valve see Figure 15 Apply mixture of liquid soap and water to gas joints Bubbles forming show a leak Correct all leaks at once Light heater see Operating Heater pages 17 through 19 Check the rest of the internal joints for leaks Turn off heater see To Turn Off Gas to Appliance page 19 Replace front panel ee Manual Shutoff Valve Closed Figure 14 Manual Shutoff Valve Thermostat Gas Valve Gas Meter nn Manual Shutoff Valve Figure 15 Checking Gas Joints 103873 OPERATING W FOR YOUR SAFETY READ BEFORE LIGHTING SR HEATER A WARNING If you do not follow these instructions exactly a fire or explosion may result causing property damage personal 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 Do not touch any electric switch do n
4. SHOOTING Continued WARNING If you smell gas building 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 e Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department IMPORTANT Operating heater where impurities in air exist may create odors Cleaning supplies paint paint remover cigarette smoke cements and glues new carpet or textiles etc create fumes These fumes may mix with combustion air and create odors OBSERVED POSSIBLE PROBLEM CAUSE REMEDY Heater produces a 1 Metal expanding while 1 This is common with clicking ticking noise just after burner is lit or shut off heating or contracting while cooling most heaters If noise is excessive contact quali fied service person Heater produces 1 Heater burning vapors 1 Ventilate room Stop unwanted odors from paint hair spray using odor causing glues etc See IMPOR products while heater is TANT statement running above 2 Gas leak See Warn 2 Locate and correct all ing statement at top leaks see Checking Gas of page Csonnections page 15 Heater shuts off in 1 Not enough fresh air is 1 Open window and or door use ODS operates available for ventilation 2 Low line pressure 2 Contact local propane LP gas company 3 ODS pilot
5. Viewed From Front of Heater THERMOSTAT SENSING BULB The thermostat sensing bulb has been placed inside the heater for protection during shipping Locating Thermostat Sensing Bulb 1 Remove front panel of heater see Figure 7 page 11 2 Locate thermostat sensing bulb just under burner assembly IMPORTANT Attach thermostat sensing bulb to back of heater for proper operation Attaching Thermostat Sensing Bulb 1 Remove thermostat sensing bulb from holders inside heater Route through slot opening in bottom of heater 2 Place clamp on thermostat sensing bulb as shown in Figure 5 Clamp is provided in hardware package 3 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 pointing up Thermostat Sensing Bulb Clamp Figure 5 Attaching Thermostat Sensing Bulb 103873 INSTALLING TO INSTALLING HEATER TO WALL WALL Mounting Bracket The mounting bracket is located on back panel of heater It has been taped there for Continued shipping Remove mounting bracket from back panel Mounting Bracket Figure 6 Bracket Location Removing Front Panel Of Heater 1 Remove two screws near bottom corners of front panel 2 Lift straight up on grill guard until it stops Grill guard will slide up about 1 4 3 Pull bottom of front panel forward then downward 4 Remove cardboard packing f
6. clothing ignition Heater will remain hot for a time after shut down Allow surface to cool before touching 11 Carefully supervise young children when they are in the same room with heater 12 Make sure grill guard is in place before running heater 13 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 14 Turn off and unplug heater and let cool before servicing Only a qualified service person should service and repair heater 15 Operating heater above elevations of 4 500 feet could cause pilot outage p 103873 PRODUCT IDENTIFICATION LOCAL CODES UNPACKING PRODUCT FEATURES Ignitor Button Control Knob g 4E OT nana ae mmnm C PE ee Grill ao TT Guard Glass Panel Heater Cabinet Figure 1 Vent Free Natural Gas Heater 30 000 Btu Hr Model Shown Install and use heater with care Follow all local codes In the absence of local codes use the latest edition of the National Fuel Gas Code ANSI Z223 also known as 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 1 Remove heater from carton 2 Remove all pro
7. is partially 3 Clean ODS pilot see clogged Cleaning and Mainte nance page 22 Gas odor even when 1 Gas leak See Warn 1 Locate and correct all control knob is in ing statement at top leaks see Checking Gas OFF position of page Connections page 15 2 Control valve defective 2 Replace control valve Gas odor during 1 Foreign matter be 1 Take apart gas tubing and combustion tween control valve remove foreign matter and burner 2 Gas leak See Warn 2 Locate and correct all ing statement at top leaks see Checking Gas of page Connections page 15 Moisture condensa 1 Not enough combus 1 Refer to Air for Combus tion noticed on tion ventilation air tion and Ventilation windows requirements page 5 You may have further questions about installation operation or troubleshooting TEC H NICAL If so contact DESA International s Technical Service Department at 1 800 323 5190 SERVICE SPECIFICATIONS CGN20T CGN20TL CGN30T CGN30TL 20 000 Btu Hr Models 30 000 Btu Hr Models Btu Variable 10 000 20 000 15 000 30 000 Type Gas Natural Only Natural Only Ignition Piezo Piezo Pressure Regulator Setting 3 W C 3 W C Inlet Gas Pressure in of water Maximum 10 5 10 5 Minimum 4 4 Dimensions Inches H x W x D Heater 23 5 x 18 5 x 8 0 23 5 x 25 9 x 8 0 Carton 25 8 x 21 3 x 10 1 25 8 x 28 7 x 10 1 Weight pounds Heater 22 30 Shipping 27 35 S ERVIC E When gas pressure is too low e pilot will not stay lit H NT
8. 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 1 Turn control knob clockwise to the PILOT position BE THERMOSTAT CONTROL OPERATION M The thermostatic control used on these models differs from standard thermo stats 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 HI and LO 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 RE MANUAL LIGHTING PROCEDURE SE 1 Remove front panel see Figure 7 page 11 2 Follow steps 1 through 5 under Lighting Instructions pages 17 and 18 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 5 Repl
9. walls over 1 2 thick or solid walls do not pop open wings N TES Figure 10 Popping Open Anchor Wings For Thin Walls 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 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 4 Horizontal Slots Stand Out Tab Mounting Bracket 3 attached to wall o o00 ro o o 0 Figure 11 Mounting Heater Onto Mounting Bracket Installing Bottom Mounting Screws 1 Locate two bottom mounting holes These holes are near bottom on back panel of heater see Figure 12 2 Mark screw locations on wall Remove heater from mounting bracket 4 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 12 If installing bottom mounting screw into wall stud drill holes at marked locations using 9 64 drill bit 5 Replace heater onto mounting bracket Place spacers between bottom mounting holes and wall anchor or drilled hole 7 Hold spacer in place with one hand With other hand insert mounting screw through bottom mounting hole and spacer Place t
10. 03 332 0191 Parts Department Cans Unlimited Inc P O Box 645 Taylor SC 29687 All States 803 879 3009 1 800 845 5301 103873 CGN20T CGN20TL CGN30T CGNS30TL 12 ODS Pilot Assembly 103873 PARTS LIST KEY NO 1 PARTS AVAILABLE NOT SHOWN Control Position Label 1 Hardware Assembly 1 PART NUMBER FOR CGN20T CGN20TL 20 000 Btu Hr 098304 01 098742 03 098742 19 103476 01 101108 01 098533 04AA 098260 09 098532 04AA M11084 26 098352 01CJ 098271 02 098249 01 099440 05 098514 01 098515 01 103446 01 098517 01 103845 02 099066 01 099415 07 099553 01 103255 01 103256 01 098522 10 098530 03 098530 04 097159 04 M11084 26 M11084 38 NJF 8C 098305 01 100642 01 CGN30T CGN30TL 30 000 Btu Hr 098304 01 098742 04 098742 20 103476 02 101108 01 098533 05AA 098260 10 098532 05AA M11084 26 098352 02CJ 098271 02 098249 01 099440 05 098514 01 098515 01 103447 01 098517 01 103845 04 099066 01 099415 07 099553 01 103255 01 103256 01 098522 12 098531 04 098531 05 097159 04 M11084 26 M11084 38 NJF 8C 098305 01 100642 01 Screw 10 x 3 8 Front Panel for C N20T CGN30T Champagne Front Panel for CGN20TL CGN30TL Ivory Grill Guard Removable Speed Clip Bottom Glass Retainer Glass Panel Top Glass Retainer Screw 10 x 3 8 Deflector Unit Ignitor Cable Nut M5 ODS Pilot Assembly Therm
11. 972 7879 for referral information When calling DESA International have ready e model number of your heater e the replacement part number These Parts Centrals are privately owned businesses They have agreed to support our customer s needs by providing original replacement parts and accessories Baltimore Electric 1348 Dixwell Avenue Hamden CT 06514 1 800 397 7553 203 248 7553 Parts Department Portable Heater Parts 342 N County Rd 400 East Valparaiso IN 46383 All States 219 462 7441 1 800 362 6951 FBD P O Box 1096 1720 Kummer Road Franklin KY 42134 502 586 1922 1 800 654 8534 Four Flags Power Products 1115 Stateline Road Niles MI 49120 616 684 2697 1 800 268 4983 Master Service Center 1184 Wilson NW Walker MI 49504 616 791 4760 1 800 446 1446 Washer Equipment Co 1715 Main Street Kansas City MO 64108 KS MO AR 816 842 3911 East Coast Energy Products 833 Broadway W Long Branch NJ 07764 908 870 8809 1 800 755 8809 Tarantin Tank Co P O Box 6129 Freehold NJ 07728 908 780 9340 1 800 922 0724 Albany Ladder 1586 90 Central Avenue Albany NY 12205 NY MA VT 518 869 5335 1 800 354 7368 Dayton Hardware P O Box 275 North Dayton Station Dayton OH 45404 All States 513 258 3721 OH 1 800 762 3426 Halco Enterprises 208 Carter Drive Unit 21 West Chester PA 19382 215 696 2670 1 800 368 0803 LA Porte s Parts amp Service 2444 N 5th Street Hartsville SC 29550 8
12. BLUE FLAME VENT FREE NATURAL GAS HEATER OWNER S OPERATION AND INSTALLATION MANUAL aos unn T nn CGN20T CGN20TL CGN30T CGNS30TL ON LLTI Heater Sizes 20 000 Btu Hr Thermostat and 30 000 Btu Hr Thermostat Model Heaters WARNING If the information in this manual is not followed exactly a fire or explosion may result causing property damage personal injury or loss of life Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electrical switch do not use any phone in your building Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions e If you cannot reach your gas supplier call the fire department Installation and service must be performed by a qualified installer service agency or the gas supplier WARNING This is an unvented gas fired heater It uses air oxygen from the room in which it is installed Provisions for adequate combustion must be provided Refer to page 5 of this manual This appliance may be in stalled in an aftermarket manufactured mobile home where not prohibited by state or local codes Aftermarket Completion of sale not for purpose of resale from the manufacturer This appliance is only for use with the type of gas indicated on th
13. Fresh air must enter your home All fuel burning appliances need fresh air for proper combustion and ventilation Exhaust fans fireplaces clothes dryers and fuel burning appliances draw air from the house to operate You must provide adequate fresh air for these appliances This will insure proper venting of vented fuel burning appliances PROVIDING ADEQUATE VENTILATION The following is exerpts from National Fuel Gas Code NFPA 54 ANSI Z223 1 Section 5 3 Air for Combustion and Ventilation All spaces in homes fall into one of the three following ventilation classifications 1 Unusually Tight Contruction 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 unusually 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 continu ous water vapor retarder with a rating of one perm 6x10 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 jo
14. HT INCORRECT FLAME PATTERN AT HIGH POSITION Figure 21 Incorrect Burner Flame Pattern If burner flame pattern is incorrect as shown in Figure 21 e turn heater off see To Turn Off Gas to Appliance page 19 e see Troubleshooting pages 22 through 25 103873 CLEANING AND MAINTENANCE TROUBLE SHOOTING Note All troubleshoot ing items are listed in order of operation A WARNING Turn off heater and let cool before cleaning CAUTION You must keep control areas burner and circulating air passage ways 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 cleaning due to excessive lint from carpet ing bedding material etc ODS PILOT AND BURNER e Use a vacuum cleaner pressurized air or small soft bristled brush to clean CABINET Air Passageways e Use a vacuum cleaner or pressurized air to clean Exterior e Use a soft cloth dampened with a mild soap and water mixture Wipe the cabinet to remove dust A WARNING Turn off and unplug heater and let cool before servicing Only a qualified service person should service and repair heater CAUTION Never use a wire needle or similar object to clean ODS pilot This can damage ODS pilot unit OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignitor button 1 is press
15. S e burner will have delayed ignition e heater will not produce specified heat When gas quality is bad e pilot will not stay lit e burner will produce flames and soot e heater will backfire when lit You may feel your gas pressure is too low or gas quality is bad If so contact your local natural gas supplier S ERVIC E 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 International PUBLICATIONS 103873 REPLACEMENT PARTS PARTS CENTRALS 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 either contact your nearest Parts Central see below or call DESA International s Technical Service Department at 1 800 323 5190 for referral information When calling DESA International have ready e your name e your address e model number 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 defective 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 below or call DESA International s Parts Department at 1 800
16. ace front panel 103873 INSPECTING BURNER Check pilot flame pattern and burner flame pattern 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 the heater will shut down Thermocouple Pilot Burner Figure 19 Incorrect Pilot Flame Pattern If pilot flame pattern is incorrect as shown in Figure 19 e turn heater off see To Turn Off Gas to Appliance page 19 e see Troubleshooting pages 22 through 25 103873 INSPECTING BURNER Continued BURNER FLAME PATTERN Figure 20 shows a correct burner flame pattern Figure 21 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 WARNING If yellow tipping occurs your heater could produce increased levels of carbon monoxide If burner flame pattern shows yellow tipping follow instructions at bottom of this page 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 CORRECT FLAME PATTERN AT HIGH POSITION Figure 20 Correct Burner Flame Pattern Yellow Tipping 1 2 GLASS HEIG
17. all Complete installation instructions included MANUAL SHUTOFF VALVE GA5010 For all models Manual shutoff valve with 1 8 NPT tap 103873 NOTES 103873 WARRANTY INFORMATION KEEP THIS WARRANTY Model Serial No Date Purchased Always specify model and serial numbers when communicating with the factory We reserve the right to amend these specifications at any time without notice The only warranty applicable is our standard written warranty We make no other warranty expressed or implied LIMITED WARRANTY COMFORT GLOW VENT FREE NATURAL GAS HEATERS DESA International warrants this product to be free from defects in materials and components for two 2 years from the date of first purchase provided that the product has been properly installed operated and maintained in accordance with all applicable instructions To make a claim under this warranty the Bill of Sale or cancelled check must be presented This warranty is extended only to the original retail purchaser This warranty covers the cost of part s required to restore this heater to proper operating condition and an allowance for labor when provided by a DESA Authorized Service Center Warranty part s MUST be obtained through authorized dealers of this product and or DESA International who wi
18. b not fully pressed in 2 Control knob not pressed in long enough 3 Safety interlock system has been triggered Thermostat models only 4 Manual shutoff valve not fully open 5 Thermocouple connec tion loose at control valve 6 Pilot flame not touch ing thermocouple which allows thermo couple 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 7 Thermocouple dam aged 8 Control valve damaged 1 Press in control knob fully 2 After ODS pilot lights keep control knob pressed in 30 seconds 3 Wait one 1 minute for safety interlock system to reset Repeat ignition operation 4 Fully open manual shut off valve 5 Hand tighten until snug then tighten 1 4 turn more 6 A Contact local natural gas company B Clean ODS pilot see Cleaning and Mainte nance page 22 or replace ODS pilot assembly 7 Replace thermocouple 8 Replace control valve Continued 103873 TROUBLE SHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Burner does not light after ODS pilot is lit 1 Burner orifice is clogged 2 Burner orifice diameter is too small 3 Inlet gas pressure is too low Clean burner see Clean ing and Maintenance page 22 or replace burner orifice Replace burner orifice Contact local natural gas company Delayed i
19. be upstream from heater see Figure 13 page 15 Apply pipe joint sealant lightly to male threads This will prevent excess sealant from going into pipe Excess sealant in pipe could result in clogged heater valves A CAUTION Use pipe joint sealant that is resistant to liquid petroleum LP gas Install sediment trap in supply line as shown in Figure 13 page 15 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 moisture and contaminants This keeps them from going into heater controls If sediment trap is not installed or is installed wrong heater may not run properly 103873 IMPORTANT Hold pressure regulator with wrench when connecting it to gas piping and CONNECTING or fittings TO GAS Pressure SUPPLY Regulator Continued 3 8 NPT Pipe Nipple A war Heater F Ground Joint Union Cabinet Tee Joint aw Manual Shutoff e Test Reducer T Valve Gauge Bushing to Connection 1 8 NPT 6 Typical Inlet Pipe from 2 14 W C to Plug Tap E 5 g 10 5 W C Pressure Tee Joint Sediment Pi Trap Nipple ey 3 Minimum Cap ti Figure 13 Gas Connection An A G A design certified manual shutoff valve with 1 8 NPT tap is an acceptable alternative to test gauge connection Purchase the optional A G A design certified manual shutoff valve from your dealer See Accessories page 30
20. carefully and completely be fore 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 DANGER Carbon monoxide poisoning may lead to death Carbon Monoxide Poisoning Early signs of carbon monoxide poisoning resemble the flu with headaches dizziness or nausea If you have these signs the heater may not be working properly Get fresh air at once Have heater serviced Some people are more affected by carbon monoxide than others These include pregnant women people with heart or lung disease or anemia those under the influence of alcohol and those at high altitudes Natural Gas Natural gas is odorless An odor making agent is added to natural gas The odor helps you detect a natural gas leak However the odor added to natural gas can fade Natural gas may be present even though no odor exists Make certain you read and understand all Warnings Keep this manual for refer ence It is your guide to safe and proper operation of this heater Safety Information continues on next page 103873 SAFETY INFORMATION Continued WARNINGS Continued WARNING Any change to this heater or its controls can be dangerous 1 This appliance is only for use with the type of gas indicated on the rating plate This appliance is not convertible for use with ot
21. e rating plate This appli ance is not convertible for use with other gases Save this manual for future reference CONTENTS SAFETY INFORMATION SECTION PAGE Safety Informatio sers en artnet its E E tee ona 2 Product Identification 2 5 nent E E EEA E 4 Local CodeS e Rss Ra E EEEE EEE RA RS 4 Unpacking i ss lasadeslasocecssttachugstsdebssetectiledd soi bedaesela lacatts EEEE 4 Product Features te Me nie de en Rem an Ma ee 4 Fresh Air For Combustion And Ventilation 0 cccecceeeceeseceeeeeceeeeeeeeeees 5 Installing To Wallen dus nn nn anses 9 Connecting To Gas Supply 14 Checking Gas Connections 15 Operating Heat r minimes nt A tite dite de Let 17 Inspecting Burner Lorna inerte Leila mA near 20 Cleaning And Maintenance 00 0 ceeceeeeseeeseeeeeeseceseceseeeseeeseeeaaesaeceseeeues 22 FroubleshoOtin s saroien ict entente Sis REA e i sf rires 22 Technicals Service sis mn nn nn R de sue 26 Specifications Last in Min item nn a Mo nn 26 DELVICE Hints sisi ini caeauneuscacevbscaeee tes start lt trs tests 26 Service Publications perecre nn tee ride rs 26 Replacement Parts 52 unanime at nn A nee 27 Parts Central Sariei piores paosta E AEA tinal aentled ated ek ced denis 27 Thlustrated Parts List sr lie Sui RA ete ih uta 28 29 ACCESSO ES Ernie ONL Raia le chat Suk eds eee 30 Warranty Information jcc c s52 anne where met nn eis chet canes Back Cover WARNINGS IMPORTANT Read this owner s manual
22. ed there is no spark at ODS pilot 2 Ignitor electrode posi tioned wrong Ignitor electrode broken Replace ignitor Replace ignitor 3 Ignitor electrode not con Reconnect ignitor cable nected to ignitor cable 4 Ignitor cable pinched or Free ignitor cable if wet pinched by any metal or tubing Keep ignitor cable dry 5 Piezo ignitor nut is loose Tighten nut holding piezo ignitor to heater cabinet Nut is located inside heater cabinet at top 6 Broken ignitor cable Replace ignitor cable 7 Bad piezo ignitor Replace piezo ignitor 103873 TROUBLE SHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignitor button is pressed there is spark at ODS pilot but no ignition 1 Gas supply turned off or manual shutoff valve closed 2 Control knob not in PILOT position 3 Control knob not pressed in while in PILOT position 4 Air in gas lines when installed 5 ODS pilot is clogged 6 Gas regulator setting is not correct 1 Turn on gas supply or open manual shutoff valve 2 Turn control knob to PILOT position 3 Press in control knob while in PILOT position 4 Continue holding down control knob Repeat igniting operation until air is removed 5 Clean ODS pilot see Cleaning and Mainte nance page 22 or replace ODS pilot assembly 6 Replace gas regulator ODS pilot lights but flame goes out when control knob is released 1 Control kno
23. gnition of burner 1 Manifold pressure is too low 2 Burner orifice is clogged Contact local natural gas company Clean burner see Clean ing and Maintenance page 22 or replace burner orifice Burner backfiring during combustion 1 Burner orifice is clogged or damaged 2 Burner damaged 3 Gas regulator defective Clean burner see Clean ing and Maintenance page 22 or replace burner orifice Replace burner Replace gas regulator Yellow flame during burner combustion 1 Not enough air 2 Gas regulator defective Check burner for dirt and debris If found clean burner see Cleaning and Maintenance page 22 Replace gas regulator Slight smoke or odor during initial opera tion 1 Residues from manu facturing processes Problem will stop after a few hours of operation Heater produces a whistling noise when burner is lit 1 Turning control knob to HI 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 LO position and let warm up for a minute Operate burner until air is removed from line Have gas line checked by local natural gas company Observe minimum installa tion clearances see Figure 4 page 10 Clean burner see Clean ing and Maintenance page 22 or replace burner orifice 103873 TROUBLE
24. her gases 2 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 Follow the gas supplier s instructions e if you cannot reach your gas supplier call the fire department This heater shall not be installed in a bedroom or bathroom 4 Never install the heater e in a recreational vehicle e where curtains furniture clothing or other flammable objects are less than 36 inches 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 5 This heater needs fresh outside air ventilation to run properly This heater has an oxygen depletion sensor ODS pilot light safety system The ODS shuts down the heater if not enough fresh air is available See Fresh Air for Combus tion and Ventilation pages 5 through 8 6 Keep air openings in front and bottom of heater clear and free of debris This will ensure enough air for proper combustion 7 If heater shuts off do not relight until you provide fresh outside air If heater keeps shutting off have it serviced 8 Do not run heater e where flammable liquids or vapors are used or stored e under dusty conditions 9 Never place any objects on the heater 10 Surface of heater becomes very hot when running heater Keep children and adults away from hot surface to avoid burns or
25. ints between wall panels at penetrations for plumbing electrical and gas lines and at other openings If your home meets all of the three criteria above you must provide additional fresh air See Ventilation Air From Outdoors page 8 If your home does not meet all of the three criteria above proceed to page 6 Confined and Unconfined Space The National Fuel Gas Code ANS IZ2123 1 1992 Section 5 3 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 aggregate 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 unconfined space Adjoining rooms are communicating only if there are doorless passageways or ventilation grills between them Cubic feet equals length x width x height of room Continued 103873 FRESH AIR FOR COMBUSTION AND VENTILATION Continued DETERMINING FRESH AIR FLOW FOR HEATER LOCATION Determining if You Have a Confined or Unconfined Space Use this worksheet to determine if you have a confined or unconfined space Space Includes the room in which you will install heate
26. ions and 2 Figure 2 You can also remove door into adjoining room see option 3 Figure 2 Follow the National Fuel Gas Code NFPA 54 ANSI 2223 1 Section 5 3 Air for Combustion and Ventilation for required size of ventila tion grills or ducts WARNING Rework worksheet adding the space of the adjoining unconfined space The combined spaces must have enough fresh air to supply all appliances in both spaces Ventilation Grills Into Adjoining Room Ventilation Option 2 Grills into Adjoining Remove Room Door into Option 1 Adjoining Room Option 3 12 Figure 2 Ventilation Air from Inside Building Continued 103873 FRESH AIR FOR COMBUSTION AND VENTILATION Continued Ventilation Air From Outdoors Provide extra fresh air by using ventilation grills or ducts You must provide two permanent 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 IMPORTANT Do not provide openings for inlet or outlet air into attic if attic has a thermostat controlled power vent Heated air entering the attic will activate the power vent Ventilated Attic Outlet Air To Attic Inlet Air Venti
27. ip of screw in opening of wall anchor or drilled hole 8 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 14 16 Make gas connections and check for leaks before replacing front panel see pages 14 16 W nN GS Figure 12 Installing Bottom Mounting Screws 103873 CONNECTING TO GAS SUPPLY NOTICE A qualified service person must connect heater to gas supply Fol low all local codes WARNING Never connect heater to private non utility gas wells This gas is commonly known as well head gas IMPORTANT Check gas line pressure before connecting heater to gas line Gas line pressure must be no greater than 14 inches of water If gas line pressure is higher heater regulator damage could occur CAUTION Use only new black iron or steel pipe Internally 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 pressure will occur Typical Inlet Pipe Diameters 20 000 Btu Hr Models 3 8 or greater 30 000 Btu Hr Model 1 2 or greater Installation must include a manual shutoff valve union and plugged 1 8 NPT tap Locate NPT tap within reach for test gauge hook up NPT tap must
28. lated Crawl Space Inlet Air Figure 3 Ventilation Air from Outdoors 103873 INSTALLING TO NOTICE WALL A qualified service person must install heater Follow all local codes CHECK GAS TYPE Use only natural gas If your gas supply is not natural gas do not install heater Call dealer where you bought heater for proper type heater INSTALLATION ITEMS Before installing heater make sure you have the items listed below e piping check local codes e test gauge connection see e sealant resistant to propane LP gas Figure 12 page 15 e manual shutoff valve e sediment trap e ground joint union e tee joint e pipe wrench AnA G A design certified manual shutoff valve with 1 8 NPT tap is an acceptable alternative to test gauge connection Purchase the optional A G A design certified manual shutoff valve from your dealer See Accessories page 30 LOCATING HEATER This heater is designed to be mounted on a wall A WARNING Maintain the minimum clearances shown in Figure 4 page 10 If you can provide greater clearances from floor ceiling and joining wall You can locate heater on floor away from a wall An optional floor mounting stand is needed Purchase the floor mounting stand from your dealer See Accessories page 30 A WARNING Never install the heater in a bedroom or a bathroom in a recreational vehicle where curtains furniture
29. ll 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 INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE TO TWO 2 YEARS FROM THE DATE OF FIRST PURCHASE AND DESA INTERNATIONAL S LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF THE PRODUCT AND DESA INTERNATIONAL SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVER INCLUDING INDIRECT INCI DENTAL 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 a
30. ocouple Ignitor Electrode Burner 3 16 Pilot Tubing Injector Mounting Bracket Pressure Regulator Pilot Shield 3 8 Outlet Burner Tubing 3 8 Inlet Tubing Thermostat Gas Valve Cabinet for CGN20T CGN30T Woodgrain Cabinet for CGN20TL CGNS3OTL Ivory Piezo Ignitor Screw 10 x 3 8 Screw 8 x 3 8 Hex Nut This list contains replaceable parts used in your heater When ordering parts follow the instructions listed under Replacement Parts on page 27 of this manual NNS sae nu un ae ae on oan noon NO nm nm Ras aA pepo ND 103873 ACCESSORIES Purchase these heater accessories from your local dealer If they can not supply these accessories either contact your nearest Parts Central see page 27 or call DESA International s Parts Department at 1 800 972 7879 for referral information You can also write to the address listed on the back page of this manual FAN KITS GA3100A and GA3200TA For all models Provides better heat distri bution Makes heater more efficient Complete installation and operating instruc tions included Manually controlled GA3100A Includes ON OFF switch Thermostatically controlled GA3200TA Includes three settings ON OFF AUTO FLOOR MOUNTING STAND 20 000 Btu Hr Models CGN20TL GA4500L Ivory CGN20T GA4500 Champagne 30 000 Btu Hr Models CGN30TL GA4510L Ivory CGN30T GA4510 Champagne For locating heater on the floor away from a w
31. ot use any phone in your building e Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department 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 or gas supplier Force 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 RE LIGHTING INSTRUCTIONS SE 1 STOP Read the safety information above 2 Make sure manual shutoff valve is fully open 3 Turn control knob clockwise N to the OFF position Control Knob Ignitor Button Figure 16 Control Knob In The OFF Position Continued 103873 OPERATING HEATER 4 Wait five 5 minutes to clear out any gas Then smell for gas including near the floor If you smell gas STOP Follow B in the safety information at the top of page 17 If you don t smell gas go to the next step 5 Turn control knob counterclockwise M to the PILOT position Press in control knob for five 5 seconds see Figure 16 Note You may be running this heater for the first time after hooking up to gas s
32. ount 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 support You must provide additional fresh air Your options are as follows A Rework worksheet adding the space of an adjoining room If the extra space provides an unconfined space remove door to adjoining 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 8 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 103873 FRESH AIR WARNING FOR If the area in which the heater may be operated is smaller than that COMBUSTION defined as an unconfined space provide adequate combustion and ventilation air by one of the methods described in the National Fuel AND Gas Code ANSI Z223 1 1992 Section 5 3 or applicable local codes VENTILATION ventication AIR Continued 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 opt
33. pply 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 DES N INTERNATIONAL 2701 Industrial Drive P O Box 90004 103873 01 Bowling Green KY 42102 9004 REV A 02 97
34. r 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 cu ft volume of space Example Space size 20 ft length x 16 ft width x 8 ft ceiling height 2560 cu ft volume of space If additional ventilation to adjoining room is supplied with grills or openings add the volume of these rooms to the total volume of the space 2 Divide the space volume by 50 cubic feet to determine the maximum Btu Hr the space can support _ volume of space 50 cu ft Maximum Btu Hr the space can support Example 2560 cu ft volume of space 50 cu ft 51 2 or 51 200 maximum Btu Hr the space can support 3 Add the Btu Hr of all fuel burning appliances in the space Vent free heater Btu Hr Gas water heater Btu Hr Gas furnace Btu Hr Vented gas heater Btu Hr Gas fireplace logs Btu Hr Other gas appliances Btu Hr Total Btu Hr Example Gas water heater 40 000 Btu Hr Vent free heater 20 000 Btu Hr Total 60 000 Btu Hr Do not include direct vent gas appliances Direct vent draws combustion air from the outdoors and vents to the outdoors 4 Compare the maximum Btu Hr the space can support with the actual amount of Btu Hr used Btu Hr maximum the space can support Btu Hr actual amount of Btu Hr used Example 51 200 Btu Hr maximum the space can support 60 000 Btu Hr actual am
35. rom grill and glass UY neEnedeneeconnpaygy LLY LLL et oono i Se 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 16 inches apart from their centers Attach mounting bracket to wall in one of two ways 1 Attaching to wall stud 2 Attaching to wall anchor Attaching to wall stud This method 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 Continued Eh 103873 INSTALLING TO WALL Continued Marking Screw Locations 1 Tape mounting bracket to wall where heater will be located Make sure mounting bracket is level WARNING Maintain minimum clearances shown in Figure 8 If you can provide greater clearances from floor and joining wall 2 Mark screw locations on wall see Figure 8 Note Only mark last hole on each end of mounting bracket Insert mounting screws through these holes only 3 Remove tape and mounting bracket from wall 11 16 71 4 16 Min T
36. tective packaging applied to heater for shipment 3 Check heater for any shipping damage If heater is damaged promptly inform dealer where you bought heater Safety Device This heater has a pilot with an Oxygen Depletion Sensor Shutoff System ODS 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 requires no matches batteries or other sources to light heater Thermostatic Heat Control Thermostat models have a thermostat sensing bulb and a control valve This results in the greatest heater comfort This can also result in lower gas bills 103873 FRESH AIR WARNING FOR This heater shall not be installed in a confined space unless provi COMBUSTION sions are provided for adequate combustion and ventilation air Read the following instructions to insure proper fresh air for this AND and other fuel burning appliances in your home VENTI L ATION Today s homes are built more energy efficient than ever New materials increased insulation and new construction methods help reduce heat loss in homes Home owners weather strip and caulk around windows and doors to keep the cold air out and the warm air in During heating months home owners want their homes as airtight as possible While it is good to make your home energy efficient your home needs to breathe
37. upply If so the control knob may need to be pressed in for 30 seconds This will allow air to bleed from the gas system If control knob does not pop up when released contact a qualified service person or gas supplier for repairs 6 With control knob pressed in push down and release ignitor button This will light pilot The pilot is attached to the front of burner The pilot can be seen through the glass panel If needed keep pressing ignitor button until pilot lights Note If pilot does not stay lit refer to Troubleshooting pages 22 through 25 Also contact a qualified service person or gas supplier for repairs Until repairs are made light pilot with match To light pilot with match see Manual Lighting Procedure page 19 7 Keep control knob pressed in for 30 seconds after lighting pilot After 30 seconds release control knob Ignitor Electrode Thermocouple Pilot Burner Figure 17 Pilot Note If pilot goes out repeat steps 3 through 7 This heater has a safety interlock system Wait one 1 minute before lighting pilot again 8 Turn control knob counterclockwise to desired heating level The main burner should light Set control knob to any heat level between HI and LO A CAUTION Do not try to adjust heating levels by using the manual shutoff valve 103873 OPERATING HEATER RE TO TURN OFF GAS TO APPLIANCE DS Shutting Off Heater 1 Turn control knob clockwise N
38. y Min j 4 A Only Insert Mounting 48 3 4 7 Only Insert Mounting 48 3 4 A Screws Through Last Min g Screws Through Last Min Hole On Each End Hole On Each End 4 Floor Floor 30 000 Btu Hr Model 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 hardware 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 Figure 9 Folding Anchor 3 Insert wall anchor wings first into hole Tap anchor flush to wall 103873 INSTALLING TO WALL Continued 4 For thin walls 1 2 or less insert red key into wall anchor Push red key to pop open anchor wings IMPORTANT Do not hammer key For thick
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