Desa Comfort Glow CGN18R Owner'S Operation And Installation Manual Download Page 28 | Manualshive

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HEATER EXPLODED VIEW

ILLUSTRATED

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BREAKDOWN

Model CGN18R

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ODS/PILOT

BURNER ASSEMBLY

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Summary of Contents for Comfort Glow CGN18R

Page 1: ... 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 In...

Page 2: ...ous injury or death from burns fire explosion electrical shock and carbon monoxide poisoning WARNING ICON G 001 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 ...

Page 3: ...xygen 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 h...

Page 4: ...ymarch Park Quincy MA 02269 Figure 1 Vent Free Natural Gas Heater Model CGN30C Shown PRODUCT FEATURES 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 ...

Page 5: ...n 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 or less with open in...

Page 6: ...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...

Page 7: ...oor on the wall connecting the two spaces see options 1 and 2 Figure 2 You can also remove door into adjoining room see option 3 Figure 2 WARNING ICON G 001 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 Figure 2 Ventilation Air from Inside Building Or Remove Door into Adjoining Room...

Page 8: ...pen 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 Figure 3 ...

Page 9: ...e 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 WARNING ICON G 001 WARNING Never install the heater in a bedroom or bathroom in a recreational vehicle where curtains furniture clothing or other ...

Page 10: ...RNING ICON G 001 CAUTION If you install the heater in a home garage heater pilot and burner must be at least 18 inches above floor locate heater where moving vehicle will not hit it For convenience and efficiency install heater where there is easy access for operation inspection and service in coldest part of room An optional fan kit is available from your dealer See Accessories page 27 If plannin...

Page 11: ...ont 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 moun...

Page 12: ... 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 leas...

Page 13: ...m 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 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 dril...

Page 14: ...st 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 WARNING ICON G 001 CAUTION Use pipe joint sealant that is resistant to liquid petroleum LP gas IMPORTANT Check gas line pressure before connecting heater to gas line Gas line pressure mus...

Page 15: ...cess 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 CHECKING GAS CONNECTIONS 3 Minimum Groun...

Page 16: ...URE 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 water to gas joints Bubbles forming show a leak 5 Correct all leaks at once 6 Light heater see Operating ...

Page 17: ... 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 syst...

Page 18: ...nd turn it counterclockwise C clockwise to 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 Clockwise to the OFF position repeat steps 5 and 6 If pilot does not stay lit after several tries refer to Troubleshooting pages 22 through 25 contact a qualified service pers...

Page 19: ...ust heating levels by using the manual shut off valve GRH OV 023A BURNER PATTERNS VANGUARD NON T STAT PLAQUE MODELS LOW OFF PILOT IGN MED OFF PILOT IGN HIGH OFF PILOT IGN OFF OFF HIGH MED LOW Control Knob CGN18R CGN30C Figure 17 Burner Patterns OPERATING HEATER Continued WARNING ICON G 001 WARNING When running heater set control knob at LOW MEDIUM or HIGH locked positions Never set control knob be...

Page 20: ...se control knob TO TURN OFF GAS TO APPLIANCE OPERATING HEATER Continued 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...

Page 21: ... shows an incorrect burner flame pattern Figure 20 Correct Burner Flame Pattern Figure 21 Incorrect Burner Flame Pattern Bad Burner Pattern 5 Plaque GRH OV 019A If burner flame pattern is incorrect as shown in Figure 21 turn heater off see To Turn Off Gas to Appliance page 20 see Troubleshooting pages 22 through 25 ...

Page 22: ...r 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 WARNING ICON G 001 CAUTION Never use a wire needle or similar object to clean ODS pilot This can damage ODS pilot unit OBSERVED PROBLEM When control knob is pressed in ...

Page 23: ...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 6 Thermocouple dam aged 7 Control valve damaged REMEDY 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 u...

Page 24: ...r orifice s see Cleaning and Main tenance page 22 or re place burner orifice s 2 Replace burner 3 Replace gas regulator 1 Replace burner 2 Contact local natural gas company 3 Turn control knob until it locks at desired setting 1 Problem will stop after a few hours of operation 1 This is common with most heaters If noise is excessive contact quali fied service person POSSIBLE CAUSE 1 Burner orifice...

Page 25: ...ion 2 Contact local natural gas company 3 Clean ODS pilot see Cleaning and Mainte nance page 22 1 Locate and correct all leaks see Checking Gas Connections page 15 2 Replace control valve 1 Take apart gas tubing and remove foreign matter 2 Locate and correct all leaks see Checking Gas Connections page 15 IMPORTANT Operating heater where impurities in air exist may create odors Cleaning supplies pa...

Page 26: ... 5190 When calling DESA International have ready your name your address model number of your heater how heater was malfunctioning type of gas used propane or natural gas 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 Par...

Page 27: ...er heat distribution Makes heater more efficient Com plete installation and operating 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 instructions included SERVICE PUBLICATIONS You can purchase a service manual from the addre...

Page 28: ... 11 6 4 8 5 6 7 12 13 9 10 14 HEATER EXPLODED VIEW ILLUSTRATED PARTS BREAKDOWN Model CGN18R 13 17 13 16 ODS PILOT BURNER ASSEMBLY A B C 13 1 13 2 13 3 13 10 13 4 13 5 13 6 13 7 13 8 13 9 13 14 13 13 13 12 13 11 13 15 ...

Page 29: ...24 01 Control Knob 1 13 See Detail Burner Assembly 1 13 1 099218 01 Burner 1 13 2 098508 01 Valve Retainer Nut 1 13 3 099056 03 Injector 3 13 4 099048 01 Tubing Valve to plaque A 1 13 5 099049 01 Tubing Valve to plaque B 1 13 6 099050 01 Tubing Valve to plaque C 1 13 7 099057 01 Pressure Tap Fitting 1 13 8 098932 06 Control Valve 1 13 9 099045 01 Pilot Tubing Valve to regulator 1 13 10 099051 01 I...

Page 30: ...EXPLODED VIEW ILLUSTRATED PARTS BREAKDOWN Model CGN30C ODS PILOT E D C 13 1 13 2 13 3 13 9 13 4 13 5 13 7 13 6 13 8 13 10 13 14 13 13 13 12 13 15 13 11 B A BURNER ASSEMBLY 1 2 3 11 6 13 4 8 5 6 7 12 9 10 14 13 17 13 16 ...

Page 31: ... 01 Control Knob 1 13 See Detail Burner Assembly 1 13 1 099218 02 Burner 1 13 2 098508 01 Valve Retainer Nut 1 13 3 099056 02 Injector 5 13 4 099052 01 Tubing Valve to plaque B D 1 13 5 099053 01 Tubing Valve to plaque C 1 13 6 099057 01 Pressure Tap Fitting 1 13 7 099054 01 Tubing Valve to plaque A E 1 13 8 098932 06 Control Valve 1 13 9 099051 02 Inlet Tubing 1 13 10 099045 01 Pilot Tubing Valve...

Page 32: ...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...

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