Desa CGN18R Gas Heater User Manual
Contents
1. 099434 PRODUCT IDENTIFICATION LOCAL CODES UNPACKING PRODUCT FEATURES Control Knob MU ima min Ann om m nnn LUT Grill Guard Burners Front Panel Heater Cabinet Figure 1 Vent Free Natural Gas Heater Model CGN30C Shown Install and use heater with care Follow all local codes In the absence of local codes use the latest edition of National Fuel Gas Code ANSI Z223 1 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 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 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 099434 FRESH AIR FOR COMBUSTION AND VENTILATION A WARNING This heater must have fresh air for proper operation If not poor fuel combustion could result Read the followin2. 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 Pilot Burner a a Figure 18 Correct Pilot Flame Pattern Pilot Burner N P s 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 above e see Troubleshooting pages 22 through 25 099434 INSPECTING BURNER Continued BURNER FLAME PATTERN Figure 20 shows a correct burner flame pattern Figure 21 shows an incorrect burner flame pattern EA SSS AA a E Figure 21 Incorrect Burner Flame Pattern If burner flame pattern is incorrect as shown in Figure 21 e turn heater off see
3. a walls and ceilings exposed to the outside atmosphere have a continu ous water vapor retarder with a rating of one perm or less with open ings 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 openings If your home meets all of the three criteria above you must provide addi tional fresh air See Ventilation Air From Outdoors page 8 If your home does not meet all of the three criteria above continue reading Unconfined Space An unconfined space has a minimum air volume of 50 cubic feet for each 1000 BTU Hr input rating of all appliances in the space cubic feet equals length x width x height of space Include adjoining rooms only if there are doorless passageways or ventilation grills between the rooms Confined Space A confined space has an air volume of less than 50 cubic feet for each 1000 BTU Hr input rating of all appliances in the space cubic feet equals length x width x height of space Include adjoining rooms only if there are doorless passageways or ventilation grills between the rooms Continued 099434 FRESH AIR DETERMINING FRESH AIR FLOW FOR HEATER LOCATION FOR Determining if You Have a Confined or Unconfined Space
4. HEATER Continued 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 Press in control knob 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 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 Keep control knob pressed in and turn it counterclockwise Nto the PILOT IGN position This will light pilot Note You will hear a loud click when the control knob reaches the PILOT IGN position If pilot does not light turn control knob clockwise X to the OFF position e repeat steps 5 and 6 If pilot does not stay lit after several tries e refer to Troubleshooting pages 22 through 25 e 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 20 Ignitor Electrode Pilot Burner Thermocouple Figure 16 Pilot 7 Keep control knob pressed in for 10 seconds after lighting pilot After 10 seconds release control knob Note If pilot goes out repeat steps 3 through 7 099434 OPERATING MM To setecr Heat
5. Use this worksheet to determine if you have a confined or unconfined space COM B USTION Space Includes the room in which you will install heater plus any adjoining rooms with AN D doorless passageways or ventilation grills between the rooms VENTI L ATION 1 Determine the volume of the space length x width x height Length x Width x Height cu ft volume of space Continued 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 18 000 BTU Hr Total 58 000 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 w
6. Combustible Material Figure 4 Mounting Clearances As Viewed From Front of Heater 099434 INSTALLING TO WALL Continued INSTALLING HEATER TO WALL Mounting Bracket The mounting bracket is located on back panel of heater It has been taped there for shipping Remove mounting bracket from back panel Mounting Bracket Figure 5 Mounting 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 down Figure 6 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 11 099434 INSTALLING TO WALL Continued
7. Marking Screw Locations 1 Tape mounting bracket to wall where heater will be located Make sure mount ing bracket is level A WARNING Maintain minimum clearances shown in Figure 7 If you can provide greater clearances from floor and joining wall 2 Mark screw locations on wall see Figure 7 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 13 16 9 1 4 16 Min A h Min AN Ay 6oo0ooo0oooooooo 00 7 Ne eoo000F70000000 0 r 3 4 g Only Insert Mounting 7 Only Insert Mounting Screws Through Last LP A Screws Through Last Taa Hole On Each End g Hole On Each End 4 d Floor Floor CGN30C CGN18R Figure 7 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 area
8. This problem could be caused by one or both of the following A Low gas pressure B Dirty or partially clogged ODS pilot 6 Thermocouple dam aged 7 Control valve damaged 1 Press in control knob fully 2 After ODS pilot lights keep control knob pressed in 10 seconds 3 Fully open manual shut off valve 4 Hand tighten until snug then tighten 1 4 turn more 5 A Contact local natural gas company B Clean ODS pilot see Cleaning and Maintenance page 22 or replace ODS pilot assembly 6 Replace thermocouple 7 Replace control valve Continued 099434 TROUBLE SHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Burner s does not 1 Burner orifice s is 1 Clean burner orifice s light after ODS pilot clogged see Cleaning and Main 1s lit tenance page 22 or re place burner orifice s 2 Burner orifice s 2 Replace burner orifice s diameter is too small 3 Inlet gas pressure is 3 Contact local natural gas too low company Delayed ignition of 1 Manifold pressure is 1 Contact local natural gas burner s too low company 2 Burner orifice s is clogged 2 Clean burner orifice s see Cleaning and Main tenance page 22 or re place burner orifice s Burner backfiring during combustion 1 Burner orifice s is clogged or damaged 2 Burner damaged 3 Gas regulator defective 1 Clean burner orifice s see Cleaning and Main tenance
9. To Turn Off Gas to Appliance page 20 e see Troubleshooting pages 22 through 25 ea 099434 CLEANING A WARNING AND Turn off heater and let cool before cleaning MAINTENANCE A CAUTION You must keep control areas burner and circulating 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 cleaning due to excessive lint from carpeting bedding material etc ODS PILOT AND BURNER ORIFICE 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 TROUBLE A WARNING SHOOTING Turn off and unplug heater and let cool before servicing Only a qualified service person should service and repair heater Note All troubleshooting items are listed in order of operation A CAUTION Never use a wire needle or similar object to clean ODS pilot This can damage ODS pilot unit OBSERVED POSSIBLE PROBLEM CAUSE REMEDY When control knobis 1 Ignitor electrode posi 1 Replace ignitor pressed in and turned tioned wrong to the PILOT IGN 2 Ignitor electrode broken 2 Replace ignitor position there is no 3 Ignitor electrode not 3 Reconnect ignitor cab
10. 98198 03 M11084 26 098462 01 098457 01 098867 05 M11084 38 098455 02 098324 01 See Detail 099218 01 098508 01 099056 03 099048 01 099049 01 099050 01 099057 01 098932 06 099045 01 099051 01 099059 01 M11084 37 099046 02 099918 01 M11084 26 098593 01 098594 01 099066 01 098465 01 This list contains replaceable parts used in your heater When ordering parts follow the instructions listed under Replacement Parts on page 26 of this manual DESCRIPTION Screw 10 x 3 8 Front Panel Grill Guard Clip Grill Guard Apron Screw 10 x 3 8 Control Rod Assembly Reflector Assembly Regulator Screw 8 x 3 8 Cabinet Assembly Control Knob Burner Assembly Burner Valve Retainer Nut Injector Tubing Valve to plaque A Tubing Valve to plaque B Tubing Valve to plaque C Pressure Tap Fitting Control Valve Pilot Tubing Valve to regulator Inlet Tubing ODS Pilot Screw 8 x 1 4 Pilot Tubing Regulator to pilot Pilot Regulator Screw 10 x 3 8 Thermocouple Ignitor Electrode Mounting Bracket Control Position Label 22 aya ld dl dl ll YA ll dl dd an pases OA Pp p 4 099434 LLUSTRATED PARTS BREAKDOWN Model CGN30C HEATER EXPLODED VIEW ODS PILOT 099434 PARTS LIST Model CGN30C ONoOaRKRWD This list contains replaceable parts used in your heater When ordering parts follo
11. ISDICTION THAT GOVERNS THE SALE OF THE PRODUCT THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED WARRANTIES AND LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES INCLUD ING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE TO TWO 2 YEARS 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 INCIDENTAL OR CONSEQUENTIAL DAMAGES Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation of incidental or consequential damages so the above limitation on implied warranties or exclusion or limitation on damages may not apply to you This warranty gives you specific legal rights and you may also have other rights that vary from state to state For information about this warranty write DES 4 INTERNATIONAL 2701 Industrial Drive P O Box 90004 Bowling Green KY 42102 9004 099434 01 REV G 5 94
12. Ignition Pressure Regulator Setting Inlet Gas Pressure in of water Maximum Minimum Dimensions Inches H x W x D Heater Carton Weight pounds Heater Shipping When gas pressure is too low e pilot will not stay lit CGN18R 6 600 12 000 18 000 Natural Only Piezo 6 W C 10 5 apt 23 5x 18 5 x 8 25 8 x 21 3 x 10 1 22 27 e burner s will have delayed ignition e heater will not produce specified heat When gas quality is bad e pilot will not stay lit e burner s 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 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 page 23 or call DESA International s Technical Service Department at 1 800 323 5190 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 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 cont
13. M POSSIBLE CAUSE REMEDY Heater produces unwanted odors 1 Heater burning vapors from paint hair spray glues etc See IMPOR TANT statement above 2 Gas leak See Warn ing statement at top of page 1 Ventilate room Stop using odor causing products while heater is running 2 Locate and correct all leaks see Checking Gas Connections page 15 Heater shuts off in use ODS operates 1 Not enough fresh air is available 2 Low line pressure 3 ODS pilot is partially clogged 1 Open window and or door for ventilation 2 Contact local natural gas company 3 Clean ODS pilot see Cleaning and Mainte nance page 22 Gas odor even when control knob is in OFF position 1 Gas leak See Warn ing statement at top of page 2 Control valve defec tive 1 Locate and correct all leaks see Checking Gas Connections page 15 2 Replace control valve Gas odor during combustion 1 Foreign matter be tween control valve and burner 2 Gas leak See Warn ing statement at top of page 1 Take apart gas tubing and remove foreign matter 2 Locate and correct all leaks see Checking Gas Connections page 15 You may have further questions about installation operation or troubleshooting If so contact DESA International s Technical Service Department at 1 800 323 5190 099434 SPECIFICATIONS SERVICE HINTS REPLACEMENT PARTS BTU Variable Type Gas
14. VENT FREE NATURAL GAS HEATER OWNER S OPERATION AND INSTALLATION MANUAL y Models CGN18R and CGN30C 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 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 Save this manual for future reference CONTENTS SAFETY INFORMATION SECTION PAGE Safety Information isc tte 2 Product Identification oonccnnnccnnonicnnncnnncncnnnononnnannnna cnn nocnnnccnnnccnnnos 4 Local Codes 2203 iis nae ia iad Si eee enon ae 4 Unpacking iii 4 Product FEAtUIreS iih3 cadeeteaeceshgssckshescecsssgadees E EENEN EE E IEEE 4 Fresh Air For Combustion And Ventilation ooooonnncnnnnconnncccnnccnnnss 5 Installing To Wall octene eaat ioti eiia 9 Connecting To Gas Supply coooccnocnononoconoconancnnncnanana nono nonn conan nono 14 Checking Gas Connections oocooccnoccnoco
15. act your nearest Parts Central see page 23 or call DESA International s Parts Department at 1 800 972 7879 for more information When calling DESA International have ready e model number of your heater e the replacement part number CGN30C 6 600 18 000 30 000 Natural Only Piezo 6 W C 10 5 ap 23 5 x 25 9 x 8 5 8 x 28 7 x 10 1 30 36 099434 PARTS CENTRALS SERVICE PUBLICATIONS ACCESSORIES These Parts Centrals are privately owned businesses They have agreed to support our customer s needs by providing original replacement parts and accessories East Coast Energy Products 833 Broadway W Long Branch NJ 07764 908 870 8809 219 462 7441 1 800 755 8809 1 800 362 6951 Taratin Tank Co FBD P O Box 6129 601 Hope Street Freehold NJ 07728 Bowling Green KY 42101 908 780 9340 502 796 8406 1 800 922 0724 1 800 654 8534 Dayton Hardware Master Service Center P O Box 275 1184 Wilson NW North Dayton Station Walker MI 49504 Dayton OH 45404 616 791 4760 513 258 3721 US 1 800 446 1446 OH 1 800 762 3426 Washer Equipment Co Halco Enterprises 1715 Main Street 208 Carter Drive Unit 21 Kansas City MO 64108 West Chester PA 19382 KS MO AR 215 696 2670 816 842 3911 US 1 800 368 0803 Portable Heater Parts 342 N County Rd 400 East Valparaiso IN 46383 All States You can purchase a service manual from the address listed on the back page of this manual Send a check for 5 00 paya
16. ay 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 Pipe Diameter CGNI18R 3 8 or greater CGN30C 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 be upstream from heater see Figure 12 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 12 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 099434 CONNECTING TO GAS SUPPLY Continued CHECKING GAS CONNECTIONS IMPORTANT Hold pressure regulator with wrench when connecting it to gas piping and or fittings Pressure Regulator L 1 2 NPT Pipe Nipple 1I Heater P Cabinet Tee Joint Test Reducer Gauge Bushing to Shutoff Connectio
17. ble to DESA International Purchase these heater accessories from your local dealer If they can not supply these accessories either contact your nearest Parts Central see above or call DESA International s Parts Department at 1 800 972 7879 for information You can also write to the address listed on the back page of this manual FAN KIT GA3100 GA2100A Provides better heat distribution Makes heater more efficient Com plete installation and operating instructions included ie fl a iii HA il i oi fia instructions included MANUAL SHUTOFF VALVE GA5010 Manual shutoff valve with 1 8 NPT tap FLOOR MOUNTING STAND Model CGN18R GA4000B Model CGN30C GA4010B For locating heater on the floor away from a wall Complete installation Laporte s Parts Service 2444 N 5th Street Hartsville SC 29550 1 803 332 019 Cans Unlimited Inc P O Box 645 Taylor SC 29687 All States 803 879 3009 1 800 845 5301 Dealers LP P O Box 341145 Bartlett TN 38184 AL TN 901 386 8780 099434 PARTS ILLUSTRATED BREAKDOWN Model CGN18R 13 16 HEATER EXPLODED VIEW 13 17 ODS PILOT BURNER ASSEMBLY 099434 PARTS LIST Model CGN18R OANDAKRWD PARTS AVAILABLE NOT SHOWN PART NUMBER 098304 01 098742 03 098238 06 098342 01 0
18. 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 A 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 099434 INSTALLING TO WALL Continued CAUTION If you install the heater in a home garage heater pilot and burner must be at least 18 inches above floor e locate heater where moving vehicle will not hit it 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 27 If planning to use fan locate heater near an electrical outlet CEILING 36 gr Minimum Minimum From Sides Of Heater Left Side ini AE Right Side W ee q i ee Minimum To Top Surface i Of Carpeting Tile Or Other FLOOR
19. d Inlet Air Crawl Space Figure 3 Ventilation Air from Outdoors 099434 INSTALLING TO WALL NOTICE 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 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 gas Figure 12 page 15 e manual shutoff valve e sediment trap e ground joint union e tee joint e pipe wrench 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 27 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 join ing 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 Accesso ries page 27 A WARNING Never install the heater in a bedroom or bathroom in a recreational vehicle where curtains furniture
20. g 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 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 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 PRODUCING ADEQUATE 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 8 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
21. gas joints Bubbles forming show a leak Correct all leaks at once Close manual shutoff valve see Figure 13 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 14 Apply mixture of liquid soap and water to gas joints Bubbles forming show a leak Correct all leaks at once Open manual shutoff valve see Figure 13 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 control valve see Figure 14 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 20 Check the rest of the internal joints for leaks Turn off heater see To Turn Off Gas to Appliance page 20 Replace front panel Manual Shutoff OMA Valve Closed Figure 13 Manual Shutoff Valve Control Valve Location O0000 0000000000000 000000000n00N nanaonan a Gas Meter fo o o 0 o el o o_o Figure 14 Checking Gas Joints 099434 OPERATING HEATER II For YOUR SAFETY READ BEFORE LIGHTING A A WARNING If you do not follow these instructions exactly a fire or explosion may result causing property damage perso
22. inG LEVEL MMMM HEATER Continued A WARNING When running heater set control knob at LOW MEDIUM or HIGH locked positions Never set control knob between locked positions Poor combustion and higher levels of carbon monoxide may result A CAUTION Do not try to adjust heating levels by using the manual shut off valve 1 Slightly press in control knob and turn counterclockwise Nto the LOW MEDIUM or HIGH positions IMPORTANT Release downward pressure while turning control knob Control knob will lock at the desired position Control Knob CGN18R CGN30C NA LOW ona MED 4 en HIGH HeH OFF Figure 17 Burner Patterns Continued 099434 OPERATING HEATER Continued INSPECTING BURNER MB To TURN OFF GAS TO APPLIANCE Ml 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 1 Turn control knob clockwise N to the PILOT position MB MANUAL LIGHTING PROCEDURE MN 1 Follow steps 1 through 6 under Lighting Instructions pages 17 and 18 2 With control knob pressed in strike match Hold match to pilot until pilot lights 3 Keep control knob pressed in for 10 seconds after lighting pilot After 10 seconds release control knob
23. ing the two spaces see options and 2 Figure 2 You can also remove door into adjoining room see option 3 Figure 2 A 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 Or into Adjoining Remove Room Door into Option 1 Adjoining Room Option 3 12 Ventilation Grills Into Adjoining Room Option 2 Figure 2 Ventilation Air from Inside Building Continued 099434 FRESH AIR FOR COMBUSTION AND VENTILATION Continued VENTILATION AIR Continued 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 NFPA 54 ANSI Z223 1 Section 5 3 Air for Combustion and Ventilation for required size of ventilation grills or ducts IMPORTANT Do not provide openings for inlet or outlet air into attic if attic has a thermostat controlled power vent Heated air entering the attic will activate the power vent gt gt Ventilated Attic Outlet Air To Attic Inlet Air Ventilate
24. ith 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 58 000 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 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 A WARNING gE You must provide additional ventilation air in a confined space 099434 FRESH 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 connect
25. itten 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 one 1 year 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 aclaim 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 only the cost of part s required torestore this heater to proper operating condition Warranty part s MUST be obtained through authorized dealers of this product and or DESA International who will provide original factory replacement parts Failure to use original factory replacement parts voids this warranty The heater MUST be installed by a qualified installer in accordance with all local codes and instructions furnished with the unit This warranty does not apply to parts that are not in original condition because of normal wear and tear or parts that fail or become damaged as a result of misuse accidents lack of proper maintenance or defects caused by improper installation Travel diagnostic cost labor transportation and any and all such other costs related to repairing a defective heater will be the responsibility of the owner TO THE FULL EXTENT ALLOWED BY THELAW OF THEJUR
26. le spark at ODS pilot connected to ignitor cable 4 Ignitor cable pinched or 4 Free ignitor cable if wet pinched by any metal or tubing Keep ignitor cable dry 5 Broken ignitor cable 5 Replace ignitor cable 6 Bad piezo ignitor 6 Replace control valve piezo is part of control valve 099434 TROUBLE SHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When control knob is pressed in and turned to the PILOT IGN position there is spark at ODS pilot but no ignition 1 Gas supply turned off or manual shutoff valve closed 2 Control knob not pressed in while being turned to PILOT IGN position 3 Air in gas lines when installed 4 ODS pilot is clogged 5 Gas regulator setting is not correct 1 Turn on gas supply or open manual shutoff valve 2 Press in control knob while turning to PILOT IGN position 3 Continue holding down control knob Repeat igniting operation until air is removed 4 Clean ODS pilot see Cleaning and Mainte nance page 22 or replace ODS pilot assembly 5 Replace gas regulator ODS pilot lights but flame goes out when control knob is released 1 Control knob not fully pressed in 2 Control knob not pressed in long enough 3 Manual shutoff valve not fully open 4 Thermocouple connec tion loose at control valve 5 Pilot flame not touch ing thermocouple which allows thermo couple to cool causing pilot flame to go out
27. m 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 loca tions using 9 64 drill bit Replace heater onto mounting bracket Place spacers between bottom mounting holes and wall anchor or drilled hole Hold spacer in place with one hand With other hand insert mounting screw through bottom mounting hole and spacer Place tip of screw in opening of wall anchor or drilled hole 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 ANN Figure 11 Installing Bottom Mounting Screws 099434 CONNECTING TO GAS SUPPLY NOTICE A qualified service person must connect heater to gas supply Follow all local codes A 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 A CAUTION Use only new black iron or steel pipe Internally tinned copper tubing m
28. may result 6 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 7 Never run heater in small closed room Open door into next room to help ventilate 8 If heater shuts off do not relight until you provide fresh outside air If heater keeps shutting off have it serviced 9 Do not run heater e where flammable liquids or vapors are used or stored e under dusty conditions 10 Never place any objects on the heater 11 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 12 Carefully supervise young children when they are in same room with heater 13 Make sure grill guard is in place before running heater 14 Do not use heater if any part has been under water Immediately call a quali fied 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 15 Turn off and unplug heater and let cool before servicing Only a qualified service person should service and repair heater 16 Operating heater above elevations of 4 500 feet may cause pilot outage
29. n 1 8 NPT Valve 1 8 NPT From Plug Tap Gas Meter 7 W C to 10 5 W C Pressure Tee Joint Sediment _ Pipe Trap Nipple t SCS 3 Minimum Cap Figure 12 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 27 A WARNING Test all gas piping and connections for leaks after installing or 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 099434 CHECKING GAS CONNECTIONS Continued 4 5 Test Pressures Equal To or Less Than 1 2 PSIG 1 2 PRESSURE TESTING HEATER GAS CONNECTIONS IS ce Check all joints of gas supply piping system Apply mixture of liquid soap and water to
30. nal 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 not use any phone in your build ing 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 MA LIGHTING INSTRUCTIONS MAMMA 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 a PILOT IGN Figure 15 Control Knob In The OFF Position Continued 17 099434 OPERATING
31. noncnononanonnncnnnona nono nonn cc nacnacnno 15 Operating Heater arieni ita tada 17 Inspecting Burner ecc tati 20 Cleaning And Maintenance coocccnoccnocononcnononnnonnncnnnonanonononnncnncconecnno 22 AA O nd 22 Technical ServiCe eis scdsecksestressascdescosteseanacescazaetete E Eaa Er asian 25 Specifications iii E oaa 26 Service Hints adi ia n a iaaa 26 Replacement Parts sieneen lides 26 Parts Central iia asia 27 Service Publications eervicccit titi cease cove cida 27 Accessories iia 27 Illustrated Parts Breakdown and Parts LiSt ooonooninicninnccniccccnnncnnnos 28 31 Warranty Information ereire irene tenien a e aaee aiei Back Cover A WARNINGS 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 A 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 persons with heart or lung disease or anemia those under the influence of alcohol and those at high altitudes Natural Gas Natural gas is
32. 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 reference It is your guide to safe and proper operation of this heater Safety Information continues on next page 099434 SAFETY A WARNINGS Continued INFORMATION i WARNING Any change to this heater or its controls can be dangerous Continued 1 Use only natural gas Do not convert heater to use different fuel type 2 Ifyou 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 3 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 Always run heater with control knob at LOW MEDIUM or HIGH locked positions Never set control knob between locked positions Poor combustion and higher levels of carbon monoxide
33. page 22 or re place burner orifice s 2 Replace burner 3 Replace gas regulator Burner plaque s does not glow 1 Plaque damaged 2 Inlet gas pressure is too low 3 Control knob set between locked positions 1 Replace burner 2 Contact local natural gas company 3 Turn control knob until it locks at desired setting Slight smoke or odor during initial opera tion 1 Residues from manu facturing processes 1 Problem will stop after a few hours of operation Heater produces a clicking ticking noise just after burner is lit or shut off 1 Metal expanding while heating or contracting while cooling 1 This is common with most heaters If noise is excessive contact quali fied service person 099434 TROUBLE SHOOTING Continued TECHNICAL SERVICE A WARNING If you smell gas e Shut off gas supply 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 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 PROBLE
34. s 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 8 X Figure 8 Folding Anchor 3 Insert wall anchor wings first into hole Tap anchor flush to wall 099434 IN ST AL LI NG 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 TO WALL For thick walls over 1 2 thick or solid walls do not pop open wings Continued N Figure 9 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 NES Horizontal Slots l Stand Out Tab SS Mounting Bracket a attached to wall o o 0 v 0 AN o o 0 00 Figure 10 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 11 2 Mark screw locations on wall 3 Remove heater fro
35. w the instructions listed under Replacement Parts on page 26 of this manual PART NUMBER 098304 01 098742 04 098238 07 098342 01 0981 98 04 M11084 26 098462 01 098457 02 098867 05 M11084 38 098456 02 098324 01 See Detail 099218 02 098508 01 099056 02 099052 01 099053 01 099057 01 099054 01 098932 06 099051 02 099045 01 099059 01 M11084 37 099047 02 099918 01 M11084 26 098593 01 098594 01 099066 01 DESCRIPTION Screw 10 x 3 8 Front Panel Grill Guard Clip Grill Guard Apron Screw 10 x 3 8 Control Rod Assembly Reflector Assembly Regulator Screw 8 x 3 8 Cabinet Assembly Control Knob Burner Assembly Burner Valve Retainer Nut Injector Tubing Valve to plaque B amp D Tubing Valve to plaque C Pressure Tap Fitting Tubing Valve to plaque A 8 E Control Valve Inlet Tubing Pilot Tubing Valve to regulator ODS Pilot Screw 8 x 1 4 Pilot Tubing Regulator to pilot Pilot Regulator Screw 10 x 3 8 Thermocouple Ignitor Electrode Mounting Bracket PARTS AVAILABLE NOT SHOWN 098465 01 Control Position Label 2 a apagas dd dad a an pean ouwp a aAp 099434 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 wr
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