BLUE FLAME VENT-FREE NATURAL GAS HEATER
Contents
1. Note Do not replace front panel at this time Replace front panel after making gas connections and checking for leaks see pages 8 and 9 Figure 11 Installing Bottom Mounting Screw Comfort Glow CGN10A AND CGN6 NATURAL GAS HEATER CONNECTING TO GAS SUPPLY NOTICE A qualified service per son 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 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 3 8 diameter or greater to allow proper gas vol ume to heater If pipe is too small undue loss of pressure will oc cur Installation must include a manual shutoff valve ground joint 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 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 CAUTION Use pipe joint seal ant that is resistant to liquid pe troleu2. NATURAL GAS HEATER SAFETY INFORMATION A WARNINGS IMPORTANT Read this owner s manual carefully and completely before trying to assemble oper ate or service this heater Im proper use of this heater can cause serious injury or death from burns fire explosion and car bon monoxide poisoning AX DANGER Carbon monoxide poisoning may lead to death Carbon Monoxide Poisoning Early signs of carbon monoxide poisoning re semble 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 reference It is your guide to safe and proper operation of this heater WARNING Any changeto this heater or its controls can be dan gerous 10 This appliance is only for use with the type of gas indicated on the rating plate This appliance is not convertible for use with other gases If you
3. other openings If your home meets all of the three criteria above you must provide ad ditional fresh air See Ventilation Air From Outdoors page 5 If your home does not meet all of the three criteria above proceed to De termining Fresh Air Flow For Heater Location Confined and Unconfined Space The National Fuel Gas Code ANSIZ2123 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 m3 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 m3 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 in stalled 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 ventila tion grills between them 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 heater plus any adjoining rooms with doorless passageways or ventilation grills between the rooms 1 Determine the volume of the space length x width x height Length x Width x
4. 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 open ings 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 sup port Example 2560 cu ft volume of space 50 cu ft 51 2 or 51 200 maximum Btu Hr the space can sup port 3 Add the Btu Hr of all fuel burning ap pliances 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 44 000 Btu Hr Vent free heater 6 000 Btu Hr Total 50 000 Btu Hr Do not include direct vent gas appli ances 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 46 100 Btu Hr maximum the space can support 50 000 Btu Hr actual amount of Btu Hr used The space in the above example is a con fined space because the actual Btu Hr used is more than the maximum Btu Hr the space c
5. currents These currents move heat to wall sur faces next to heater Installing heater next to vinyl or cloth wall coverings or operating heater where impurities in the air such as tobacco smoke exist may discolor walls IMPORTANT Vent free heaters add mois ture 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 3 through 5 A CAUTION If you install the heater in a home garage e heater pilot and burner must be at least 18 inches above floor locate heater where moving ve hicle will not hit it For convenience and efficiency install heater e where there is easy access for op eration inspection and service e in coldest part of room CEILING 36 Minimum en Minimum From Sides Of Heater Right Left Side Side 00 one ee eae Minimum To Top Surface Of Carpeting FLOOR Tile Or Other combustible Material Figure 4 Mounting Clearances As Viewed From Front of Heater INSTALLING HEATER TO WALL Marking Screw Locations 1 Determine where you will locate heater WARNING Maintain minimum clearances shown in Figure 5 If you can provide greater clear ances from floor and joining wall 2 Mark two mounting screw locations on wall see Figure 5 87 8 7 3 4 Minimu
6. ee a TI OPERATING HEATER FOR YOUR SAFETY READ BEFORE LIGHTING A WARNING If you do not fol low these instructions exactly a fire or explosion may result caus ing property damage personal injury or loss of life ther 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 wa ter to gas joints Bubbles forming show a leak Correct all leaks at once 101870 Manual Shutoff Valve Figure 14 Checking Gas Joints This appliance has a pilot which must be lighted by hand When lighting the pilot follow these instructions ex actly 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 Do not try to light any appliance Do not touch any electric switch do not use any phone in your build ing Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you cannot reach your gas sup plier call the fire department Use only your hand to push in or turn the gas control knob Never use tools If the knob will not push in or turn by hand don t try to repair it call a qualified service technician
7. panel see Figure 10 page 7 Follow steps 1 through 5 under Light ing Instructions With control knob pressed in strike match Hold match to pilot until pi lot lights Keep control knob pressed in for 30 seconds after pilot is lit After 30 sec onds release control knob Replace front panel 101870 INSPECTING BURNER Check pilot flame pattern and burner flame pattern often PILOT FLAME PATTERN Figure 17 shows a correct pilot flame pat tern Figure 18 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 Thermocouple Figure 17 Correct Pilot Flame Pattern Pilot Burner Thermocouple Figure 18 Incorrect Pilot Flame Pattern If pilot flame pattern is incorrect as shown in Figure 18 e turn heater off see To Turn Off Gas to Appliance page 10 e see Troubleshooting pages 12 through 14 101870 OWNER S MANUAL BURNER FLAME PATTERN Figure 19 shows a correct burner flame pattern Figure 20 shows an incorrect burner flame pattern The incorrect burner flame pattern shows yellow tipping of the flame It also shows the flame higher than 1 2 the glass panel height A WARNING If yellow tipping occurs your heater could pro duce increased levels of carbon monoxide If burner flame pat tern shows yellow tipping follow instructi
8. smell gas e shut off gas supply do not try to light any appliance do not touch any electrical switch do not use any phone in your build ing 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 Heater model CGNIOA shall not be installed in a bathroom Never install the heater in a recreational vehicle where curtains furniture clothing or other flammable objects are less than 36 inches from the front top or sides of the heater as a fireplace insert in high traffic areas in windy or drafty areas This heater needs fresh outside air ven tilation to run properly This heater has an oxygen depletion sensor ODS pi lot 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 3 through 5 Keep all air openings in front and bot tom of heater clear and free of debris This will insure enough air for proper combustion If heater shuts off do not relight until you provide fresh outside air If heater keeps shutting off have it serviced Do not run heater e where flammable liquids or vapors are used or stored e under dusty conditions Never place any objects on the heater Surface of heater becomes very hot when running heater Keep children and adults away from hot surface to avoid burns or clothing igniti
9. 2445 01 099393 01 098508 01 098303 02 099553 01 099818 01 CGN10A 098304 01 099467 02 099318 04 101108 01 102018 01AA 098260 03 098532 03AA M11084 38 098352 03BR 098271 03 098249 01 100701 03 098514 01 098594 01 099386 02 099387 05 098251 03 099463 01 099415 01 099462 01 099391 02 098276 01 099057 01 099413 01 099468 11 102445 01 099393 01 098508 01 098303 02 099553 01 099818 01 DESCRIPTION Screw 10 x 3 8 Front Panel Assembly Grill Guard Grill Guard Clip Bottom Glass Retainer Glass Panel Top Glass Retainer Screw 8 x 3 8 Deflector Unit Ignitor Cable Nut M5 ODS Pilot Assembly Thermocouple Ignitor Electrode Burner Pilot Tubing Injector Injector Holder Pressure Regulator Burner Tubing Regulator Tubing 1 8 NPT Plug Pressure Tap Fitting Control Valve Cabinet Piezo Ignitor Control Knob Valve Retainer Nut Screw 6 x 5 16 Pilot Shield Internal Tooth Washer n e Pp e oa se oe oon on enon nnn non psoome in goa aA p p PARTS AVAILABLE NOT SHOWN 099395 10 100642 02 099395 03 100642 02 Control Position Label Assembly Hardware 1 Comfort Glow CGN10A AND CGN6 NATURAL GAS HEATER PARTS CENTRALS 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 20
10. 3 248 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 Parts Only 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 707 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 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 North 5th Street Hartsville SC 29550 803 332 0191 Parts Department Cans Unlimited Inc P O Box 645 Taylor SC 29687 All States 803 879 3009 1 800 845 5301 101870 OWNER S MANUAL NOTES 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 o
11. BLUE FLAME VENT FREE NATURAL GAS HEATER OWNER S OPERATION AND INSTALLATION MANUAL MTT MODELS CGN10A AND CGN6 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 WARNING This is an unvenied 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 3 of this manual This appliance may be installed 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 the rating plate This appliance is not convertible for use with other gases Save this manual for future reference Comfort Glow CGN10A AND CGN6
12. CGN6 NATURAL GAS HEATER INSTALLING TO WALL NOTICE A qualified service per son 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 sealant resistant to propane LP gas manual shutoff valve ground joint union test gauge connection see Figure 12 page 8 sediment trap tee joint pipe wrench AnA G A design certified manual shutoff valve with 1 8 NPT tap is an acceptable alternative to test gauge connection Pur chase the optional A G A design certified manual shutoff valve from your dealer See Accessory page 15 LOCATING HEATER This heater is designed to be mounted on a wall AX WARNING Maintain the mini mum clearances shown in Figure 4 Ifyou can provide greater clear ances from floor ceiling and join ing wall A WARNING Never install the heater inabathroom Model CGN10A Input 10 000 Btu s e in a recreational vehicle where curtains furniture clothing or other flammable objects are less than 36 inches from the front top or sides of the heater as a fireplace insert e in high traffic areas in windy or drafty areas A CAUTION This heater cre ates warm air
13. ED 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 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 A INTERNATIONAL 2701 Industrial Drive P O Box 90004 yee Bowling Green KY 42102 9004 7 97
14. GN6 NATURAL GAS HEATER TROUBLESHOOTING Note All troubleshooting items are listed in order of operation OBSERVED PROBLEM AX WARNING Turn off heater and letcool before servicing Only a qualified service person should service and repair heater A CAUTION Never use a wire needle or similar object to clean ODS pilot This can damage ODS pilot unit POSSIBLE CAUSE REMEDY When ignitor button is pressed there is no spark at ODS pilot 1 Ignitor electrode positioned wrong 2 Ignitor electrode broken 3 Ignitor electrode not connected to igni tor cable 4 Ignitor cable pinched or wet 5 Piezo ignitor nut is loose Broken ignitor cable Bad piezo ignitor sO 1 Replace ignitor 2 Replace ignitor 3 Reconnect ignitor cable 4 Free ignitor cable if pinched by any metal or tubing Keep ignitor cable dry 5 Tighten nut holding piezo ignitor to heater cabinet Nut is located inside heater cabinet at top 6 Replace ignitor cable 7 Replace piezo ignitor When ignitor button is pressed there is spark at ODS pilot but no ignition 1 Gas supply turned off or manual shutoff valve closed Control knob not in PILOT position Control knob not pressed in while in PI LOT position 4 Air in gas lines when installed Ww N 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 po
15. NICAL SERVICE You may have further questions about in stallation operation or troubleshooting If so contact DESA International s Techni cal Service Department at 1 800 323 5190 SERVICE HINTS When gas pressure is too low e pilot will not stay lit 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 101870 SERVICE PUBLICATIONS You can purchase a service manual from the address listed on the back page of this manual Send a check for 5 00 payable to DESA International ACCESSORY Purchase this heater accessory from your local dealer If they cannot supply this ac cessory either contact your nearest Parts Central page 18 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 MANUAL SHUTOFF VALVE GA5010 Manual shutoff valve with 1 8 NPT tap REPLACEMENT PARTS Note Use only original replacement parts This will protect your warranty coverage for parts replaced under warranty Parts Under Warranty Contact authorized dealer from whom you purchased this product If they cannot sup ply original replacement part s call DESA I
16. an 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 ventila tion grills between rooms See Ventila tion Air From Inside Building page 5 B Ventroom directly to the outdoors See Ventilation Air From Outdoors page 5 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 AAWARNING Ifthe areain which the heater may be operated is smaller than that defined as an unconfined space provide ad equate combustion and ventila tion air by one of the methods described in the National Fuel Gas Code ANSI 2223 1 1992 Section 5 3 or applicable local codes 101870 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 pro vide two permanent openings one within 12 of the ceiling and one within 12 of the floor on the wall connecting the two spaces see options 1 and 2 Figure 2 You can also remove door into adjoining room see op tion 3 Figure 2 Follow the National Fuel Gas C
17. eaks see Check ing Gas Connections page 9 Heater shuts off in use ODS operates Not enough fresh air is available Low line pressure ODS pilot is partially clogged Open window and or door for ventila tion Contact local natural gas company Clean ODS pilot see Cleaning and Maintenance page 11 Gas odor even when control knob is in OFF position Gas leak See Warning statement at top of page Control valve defective Locate and correct all leaks see Check ing Gas Connections page 9 Replace control valve Gas odor during combustion Foreign matter between control valve and burner Gas leak See Warning statement at top of page Take apart gas tubing and remove for eign matter Locate and correct all leaks see Check ing Gas Connections page 9 Moisture condensation noticed on windows Not enough combustion ventilation air Refer to Fresh Air for Combustion and Venti lation requirements page 3 101870 SPECIFICATIONS OWNER S MANUAL CGN6 CGN10A Btu Variable 4 400 6 000 5 000 10 000 Type Gas Natural Only Natural Only Ignition Piezo Piezo Pressure Regulator Setting 3 W C 3 W C Inlet Gas Pressure inches of water Maximum 10 5 10 5 Minimum 4 4 Dimensions Inches H x W x D Heater 20 1 2 x 13 1 2x5 20 1 2 x 13 1 2x5 Carton 25x16 11 16x71 2 25x16 11 16 x 7 1 2 Weight pounds Heater 13 5 13 5 Shipping 17 18 TECH
18. en two screws until 1 16 space thickness of penny is between screwheads and wall see Figure 8 Thin or Thick Wall thick wall shown Figure 8 Tightening Anchors Placing Heater On Mounting Screws 1 Locate two keyhole slots on back panel of heater see Figure 9 2 Place large openings of slots over screwheads Slide heater down until screws are in small portion of slots Keyhole Slots Figure 9 Location Of Keyhole Slots On Back Panel Of Heater Removing Front Panel Of Heater 1 Remove two screws near bottom cor ners 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 10 Removing Front Panel Of Heater AYN Installing Bottom Mounting Screw 1 Locate bottom mounting hole This hole is near bottom on back panel of heater see Figure 11 Mark screw location on wall Remove heater from wall If installing bottom mounting screw into hollow or solid wall install wall anchor Follow steps 1 through 5 under Attaching To Wall Anchor Method If installing bottom mounting screw into wall stud drill hole at marked lo cation using 9 64 drill bit 5 Replace heater on wall 6 Insert bottom anchor screw through back panel into bottom anchor or drilled hole see Figure 11 7 Tighten screw until heater is firmly se cured to wall Do not over tighten
19. er is damaged promptly inform dealer where you bought heater 101870 PRODUCT FEATURES Safety Device This heater has a pilot with an Oxygen Depletion Sensor Shutoff System ODS The ODS pilot is arequired 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 FRESH AIR FOR COMBUSTION AND VENTILATION AX WARNING This heater shall not be installed in a confined space unless provisions are pro vided for adequate combustion and ventilation air Read the fol lowing instructions to insure proper fresh air for this and other fuel burning appliances in your home Today s homes are built more energy effi cient than ever New materials increased insulation and new construction methods help reduce heat loss in homes Home own ers 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 pos sible 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 com bustion and ventilation Exhaust fans fireplaces clothes dryers and fuel burning appliances draw air from the house to operate You must provide ad eq
20. est 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 ei ther using compressed air or opening main gas valve located on or near gas meter 4 Check all joints of gas supply piping system Apply mixture of liquid soap and water to gas joints Bubbles form ing show a leak 5 Correct all leaks at once Test Pressures Equal To or Less Than 1 2 PSIG 1 Close manual shutoff valve see Fig ure 13 2 Pressurize supply piping system by ei OWNER S MANUAL PRESSURE TESTING HEATER GAS CONNECTIONS 1 Open manual shutoff valve see Figure 13 2 Open main gas valve located on or near gas meter 3 Make sure control knob of heater is in the OFF position 4 Check all joints from manual shutoff valve to control valve see Figure 14 Apply mixture of liquid soap and wa ter to gas joints Bubbles forming show a leak 5 Correct all leaks at once 6 Light heater see Operating Heater pages 9 and 10 Check the rest of the internal joints for leaks Turn off heater see To Turn Off Gas to Appliance page 10 8 Replace front panel Open Manual Shutoff Valve AN ee A Figure 13 Manual Shutoff Valve Gas Meter Control Valve Location a
21. et gas pressure is too low Maintenance page 11 or replace burner orifice Replace burner orifice Contact local natural gas company Delayed ignition of burner 1 Manifold pressure is too low 2 Burner orifice is clogged Contact local natural gas company Clean burner orifice see Cleaning and Maintenance page 11 or replace burner orifice Burner backfiring during combustion 1 Burner orifice is clogged or damaged 2 Burner damaged 3 Gas regulator defective Clean burner orifice see Cleaning and Maintenance page 11 or replace burner orifice Replace burner Replace gas regulator Yellow flame during burner combustion 1 Not enough air 2 Inlet gas pressure is too low 3 Gas regulator defective Check burner for dirt and debris If found clean burner see Cleaning and Maintenance page 11 Contact local natural gas company Replace gas regulator Slight smoke or odor during initial opera 1 Residues from manufacturing processes tion Problem will stop after a few hours of operation Heater produces a whistling noise when 1 Turning control knob to HIGH position burner is lit when burner is cold 2 Air in gas line 3 Air passageways on heater blocked 4 Dirty or partially clogged burner orifice 101870 13 Turncontrol knob to LOW position and let warm up for a minute Operate burner until air is removed from line Have gas checked by local natural gas c
22. m LP gas Install sediment trap in supply line as shown in Figure 12 Locate sediment trap where it is within reach for cleaning Locate sedi ment 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 IMPORTANT Hold pressure regulator with wrench when connecting it to gas piping and or fittings ae Pressure Regulator 3 8 NPT Pipe Nipple x RE Heater aE Cabinet Q Ground Joint Union l Tee Joint Manual Shutoff Valve Reducer Test Bushi From Gas o Nee Gauge aa Ci Connection ioe We 1 8 NPT Pressure Plug Tap Tee Joint Pipe Sediment Trap Nipple 3 Minimum S Z Cap 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 Accessory page 15 Figure 12 Gas Connection 8 101870 CHECKING GAS CONNECTIONS A WARNING Test all gas pip ing and connections for leaks after installing or servicing Cor rect all leaks at once 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 T
23. m To Maintain 6 Clearance From Wall Mounting 20 1 4 J Screw Minimum To lt Locations Maintain 3 2 Clearance Z From Floor zZ O FLOOR Figure 5 Mounting Screw Locations Continued 101870 INSTALLING TO WALL Continued Installing Two Mounting Screws Note Wall anchors and mounting screws are in hardware package The hardware pack age is provided with heater Attaching to wall stud method For attaching mounting screw to wall stud 1 Drill hole at marked location using 9 64 drill bit Insert mounting screw into wall stud 3 Tighten screw until 1 16 space thick ness of penny is between screwhead and wall Attaching to wall anchor method Follow instructions below to attach mount ing screws to hollow walls wall areas be tween 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 1 4 deep 2 Fold wall anchor see Figure 6 y Figure 6 Folding Anchor 3 Insert wall anchor wings first into hole Tap anchor flush to wall 4 Forthin walls 1 2 or less insert red key into wall anchor Push red key to pop open anchor wings see Figure 7 IMPORTANT Do not hammer key For thick walls over 1 2 thick or solid walls do not pop open wings Thin Walls 1 4 to 1 2 thick mE S Figure 7 Popping Open Anchor Wings For Thin Walls 101870 OWNER S MANUAL 5 Tight
24. nternational s Technical Service Depart ment at 1 800 323 5190 for referral infor mation When contacting your dealer or DESA In ternational have ready your name e your address model number of your heater how heater was malfunctioning type of gas used propane LP or natu ral gas purchase date Usually we will ask you to return the defec tive part to the factory Parts Not Under Warranty Contact authorized dealers of this product If they cannot supply original replacement part s either contact your nearest Parts Central see page 18 or call DESA International s Parts Department at 1 800 972 7879 for referral information When calling DESA International have ready e model number of your heater e the replacement part number Comfort Glow CGN10A AND CGN6 NATURAL GAS HEATER ILLUSTRATED PARTS LIST HEATER EXPLODED VIEW ODS PILOT 16 101870 PARTS LIST 101870 OWNER S MANUAL This list contains replaceable parts used in your heater When ordering parts follow the instructions listed under Replacement Parts on page 15 of this manual PART NUMBER FOR CGN6 098304 01 099467 02 099318 04 101108 01 102018 01AA 098260 03 098532 03AA M11084 38 098352 03BR 098271 03 098249 01 100701 03 098514 01 098594 01 099386 02 099387 05 098251 01 099463 01 099415 01 099462 01 099391 02 098276 01 099057 01 099413 01 099468 12 10
25. ode NFPA 54 ANSI Z223 1 Section 5 3 Air for Combustion and Ventilation for required size of ventilation grills or ducts AX WARNING Rework work sheet adding the space of the adjoining unconfined space The combined spaces must have enough fresh air to supply all appliances in both spaces Ventilation Air From Outdoors Provide extra fresh air by using ventilation grills or ducts You must provide two per manent 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 101870 OWNER S MANUAL Ventilation Grills Or into Adjoining Remove Room Door into Option 1 Adjoining Room Option 3 O J 12 Ventilation Grills Into Adjoining Room Option 2 ony orm i l z ES Figure 2 Ventilation Air from Inside Building ALLEEN Ventilated Attic Outlet Air Inlet Air To Attic Inlet Air Figure 3 Ventilation Air from Outdoors Ventilated Crawl Space Comfort Glow CGN10A AND
26. ompany Observe minimum installation clear ances see Figure 4 page 6 Clean burner see Cleaning and Main tenance page 11 or replace burner ori fice Continued Comfort Glow CGN10A AND CGN6 NATURAL GAS HEATER TROUBLESHOOTING Continued OBSERVED PROBLEM A WARNING If you smell gas Shut off gas supply Do not try to light any appliance Do not touch any electrical switch do not use any phone in your building Immediately call your gas supplier from aneighbor 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 POSSIBLE CAUSE REMEDY Heater produces a clicking ticking noise just after burner is lit or shut off 1 Metal expanding while heating or con tracting while cooling 1 This is common with most heaters If noise is excessive contact qualified ser vice person Heater produces unwanted odors Heater burning vapors from paint hair spray glues etc See IMPORTANT statement above Gas leak See Warning statement at top of page Ventilate room Stop using odor causing products while heater is running Locate and correct all l
27. on Heater will remain hot for a time after shut down Allow surface to cool before touching 11 12 13 14 15 Carefully supervise young children when they are in same room with heater Make sure grill guard is in place be fore running heater 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 Turn off heater and let cool before ser vicing Only a qualified service person should service and repair heater Operating heater above elevations of 4 500 feet could cause pilot outage 101870 PRODUCT IDENTIFICATION Ignitor Button OWNER S MANUAL Control Knob Grill Guard Glass Panel eon LMI Cabinet Panel Figure 1 Vent Free Natural Gas Heater Model CGN10A Shown LOCAL CODES 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 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 UNPACKING 1 Remove heater from carton 2 Remove all protective packaging ap plied to heater for shipment 3 Check heater for any shipping damage If heat
28. ons at bottom of this page NOTICE Do not mistake orange flames with yellow tipping Dust or other fine particles enter the heater and burn causing brief patches of orange flame MUA Fi i Model CGN10A CORRECT FLAME PATTERN AT HIGH POSITION Model CGN6 will be lower due to lower input rating Figure 19 Correct Burner Flame Pattern Yellow i ii j ill 1 Tipping ra a GLASS HEIGHT INCORRECT FLAME PATTERN AT HIGH POSITION Figure 20 Incorrect Burner Flame Pattern Ifburner flame pattern is incorrect as shown in Figure 20 e turn heater off see To Turn Off Gas to Appliance page 10 e see Troubleshooting pages 12 through 14 CLEANING AND MAINTENANCE A WARNING Turn off heater and let cool before cleaning A CAUTION You must keep control areas burner and circu lating air passageways of heater clean Inspect these areas of heater before each use Have heater inspected yearly by a quali fied 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 Comfort Glow CGN10A AND C
29. or gas supplier Force or attempted repair may result in a fire or explosion Do not use this appliance if any part has been under water Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been un der water Comfort Glow CGN10A AND CGN6 NATURAL GAS HEATER 1 2 Ignitor Button LIGHTING INSTRUCTIONS STOP Read the safety information page 9 column 3 Make sure manual shutoff valve is fully open Turn control knob clockwise yor to the OFF position Control Knob Figure 15 Control Knob In The OFF Position 4 Wait five 5 minutes to clear out any gas Then smell for gas including near the floor If you smell gas STOP Follow B in the safety information at the top of column 3 page 9 If you don t smell gas go to the next step Press in control knob and turn coun terclockwise N to the PILOT position Keep control knob pressed in for five 5 seconds see Figure 15 Note You may be running this heater for the first time after hook ing up to gas supply If so the con trol 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 With control knob pressed in push down and release ignitor button This will light pilot The pilot i
30. s 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 12 through 14 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 7 8 Thermocouple Keep control knob pressed in for 30 seconds after lighting pilot After 30 seconds release control knob Note If pilot goes out repeat steps 3 through 7 Turn control knob counterclockwise to the HIGH position The main burner should light Set control knob to any heat level between HIGH and LOW To turn control knob from HIGH to a lower setting press in the control knob and turn counterclock wise Note Both HIGH and LOW are locked positions You must press in control knob before turning it from these positions Ignitor Electrode Pilot Burner 25 Figure 16 Pilot A CAUTION Do nottry to adjust heating levels by using the manual shutoff valve TO TURN OFF GAS TO APPLIANCE Shutting Off Heater 1 Turn control knob clockwise N to the PILOT position Press in control knob and turn clock wise to the OFF position Shutting Off Burner Only pilot stays lit 1 1 Turn control knob clockwise N4 to the PILOT position MANUAL LIGHTING PROCEDURE Remove front
31. sition 3 Press in control knob while in PILOT position 4 Continue holding down control knob Repeat igniting operation until air is re moved 5 Clean ODS pilot see Cleaning and Maintenance page 11 or replace ODS pilot assembly 6 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 connection loose at con trol valve 5 Pilot flame not touching thermocouple which allows thermocouple to cool causing pilot flame to go out This prob lem could be caused by one or both of the following A Low gas pressure B Dirty or partially clogged ODS pilot Thermocouple damaged Control valve damaged sO 1 Press in control knob fully 2 After ODS pilot lights keep control knob pressed in 30 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 11 or replace ODS pilot assembly 6 Replace thermocouple 7 Replace control valve Continued 101870 OWNER S MANUAL TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Burner does not light after ODS pilot is lit 1 Burner orifice is clogged 1 Clean burner orifice see Cleaning and 2 Burner orifice diameter is too small 3 Inl
32. uate 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 Uncon fined Space 3 Confined Space The information on pages 4 and 5 will help you classify your space and provide ad equate ventilation Continued Comfort Glow CGN10A AND CGN6 NATURAL GAS HEATER FRESH AIR FOR COMBUSTION AND VENTILATION Continued Unusually Tight Construction The air that leaks around doors and win dows may provide enough fresh air for combustion and ventilation However in buildings of unusually tight construction you must provide additional fresh air Unusually tight construction is defined as construction where a walls and ceilings exposed to the outside atmosphere have a continuous water vapor re tarder with a rating of one perm 6x10 kg per pa sec m2 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 ap plied to areas such as joints around window and door frames between sole plates and floors between wall ceil ing joints between wall panels at penetrations for plumbing electrical and gas lines and at
33. ur standard written warranty We make no other warranty expressed or implied LIMITED WARRANTY COMFORT GLOW VENT FREE RESIDENTIAL 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 only the cost of part s required to restore 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 ALLOW
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