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Desa Comfort Glow CGN18R Owner's Operation And Installation Manual

Desa owner's operation and installation manual vent-free natural gas heater cgn18r, cgn30c
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VENT-FREE NATURAL GAS HEATER
OWNER'S OPERATION AND INSTALLATION MANUAL
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.
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Summary of Contents for Desa Comfort Glow CGN18R

  • Page 1 VENT-FREE NATURAL GAS HEATER OWNER’S OPERATION AND INSTALLATION MANUAL 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.

  • Page 2: Table Of Contents

    CONTENTS SAFETY INFORMATION SECTION Safety Information ... 2 Product Identification ... 4 Local Codes ... 4 Unpacking ... 4 Product Features ... 4 Fresh Air For Combustion And Ventilation ... 5 Installing To Wall ... 9 Connecting To Gas Supply ... 14 Checking Gas Connections ...
  • Page 3 SAFETY INFORMATION Continued 099434 WARNINGS WARNING ICON G 001 WARNING: Any change to this heater or its controls can be dangerous. 1. Use only natural gas. Do not convert heater to use different fuel type. 2. If you smell gas •...

  • Page 4: Product Identification

    Panel COMFORT GLOW PLAQUE FRONT-NON THERMO 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*.

  • Page 5: Fresh Air For Combustion And Ventilation

    FRESH AIR COMBUSTION VENTILATION 099434 WARNING ICON G 001 This heater must have fresh air for proper operation. If not, poor fuel combustion could result. Read the following instructions to insure proper fresh air for this and other fuel-burning appliances in your home.
  • Page 6 Example: 2560 cu. ft. (volume of space) ÷ 50 cu. ft. = BTU/Hr the space can support) 3. Add the BTU/Hr of all fuel burning appliances in the space. Vent-free heater Gas water heater* Gas furnace Vented gas heater Gas fireplace logs Other gas appliances* Total Example: Gas water heater...
  • Page 7 FRESH AIR COMBUSTION VENTILATION Continued 099434 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"...
  • Page 8 FRESH AIR COMBUSTION 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.

  • Page 9: Installing To Wall

    INSTALLING TO WALL 099434 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.
  • Page 10 INSTALLING TO WALL Continued WARNING ICON 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 •...
  • Page 11 INSTALLING TO WALL Continued 099434 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. Figure 5 - Mounting Bracket Location Removing Front Panel Of Heater 1.
  • Page 12 Figure 8 - Folding Anchor 3. Insert wall anchor (wings first) into hole. Tap anchor flush to wall. WARNING 9 1/4" 16" Min. Only Insert Mounting 18 3/4" Screws Through Last Min. Hole On Each End Floor CGN18R 18 3/4" Min. 099434...
  • Page 13 INSTALLING TO WALL Continued 099434 4. For thin walls (1/2" or less), insert red key into wall anchor. Push red key to “pop” open anchor wings. IMPORTANT: For thick walls (over 1/2" thick) or solid walls, do not pop open wings. Figure 9 - Popping Open Anchor Wings For Thin Walls 5.

  • Page 14: Connecting To Gas Supply

    If pipe is too small, undue loss of pressure will occur. Typical Pipe Diameter CGN18R CGN30C Installation must include a manual shutoff valve, union, and plugged 1/8" NPT tap.

  • Page 15: Checking Gas Connections

    CONNECTING TO GAS SUPPLY Continued CHECKING CONNECTIONS 099434 Hold pressure regulator with wrench when connecting it to gas piping IMPORTANT: and/or fittings. Pressure Regulator Heater Cabinet Tee Joint Test Reducer Bushing to Gauge 1/8" NPT Connection * 1/8" NPT Plug Tap Tee Joint Sediment Pipe...
  • Page 16 CHECKING CONNECTIONS Continued 4. Check all joints of gas supply piping system. Apply mixture of liquid soap and water to gas joints. Bubbles forming show a leak. 5. Correct all leaks at once. Test Pressures Equal To or Less Than 1/2 PSIG 1.

  • Page 17: Operating Heater

    OPERATING HEATER 099434 FOR YOUR SAFETY READ BEFORE LIGHTING WARNING ICON G 001 If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. A. This appliance has a pilot which must be lighted by hand. When lighting the pilot, follow these instructions exactly.
  • Page 18 OPERATING 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.
  • Page 19 1. Slightly press in control knob and turn counterclockwise LOW, MEDIUM, or HIGH positions. Release downward pressure while turning control knob. IMPORTANT: Control knob will lock at the desired position. Control Knob CGN18R PILOT PILOT PILOT HIGH BURNER PATTERNS-VANGUARD NON T-STAT PLAQUE MODELS Figure 17 - Burner Patterns...

  • Page 20: Inspecting Burner

    OPERATING HEATER Continued INSPECTING BURNER TO TURN OFF GAS TO APPLIANCE Shutting Off Heater 1. Turn control knob clockwise 2. Turn off all electric power to the appliance if service is to be performed. Shutting Off Burner Only (pilot stays lit) 1.
  • Page 21 INSPECTING BURNER Continued 099434 BURNER FLAME PATTERN Figure 20 shows a correct burner flame pattern. Figure 21 shows an incorrect burner flame pattern. Figure 20 - Correct Burner Flame Pattern Bad Burner Pattern 5 Plaque Figure 21 - Incorrect Burner Flame Pattern If burner flame pattern is incorrect, as shown in Figure 21 •...

  • Page 22: Cleaning And Maintenance

    CLEANING MAINTENANCE TROUBLE- SHOOTING Note: All troubleshooting items are listed in order of operation. WARNING ICON G 001 Turn off heater and let cool before cleaning. WARNING ICON You must keep control areas, burner, and circulating air passageways of heater clean. Inspect these areas of heater before each use.
  • Page 23 TROUBLE- SHOOTING Continued 099434 OBSERVED POSSIBLE PROBLEM CAUSE When control knob is 1. Gas supply turned off pressed in and turned or manual shutoff to the PILOT/IGN valve closed position, there is 2. Control knob not spark at ODS/pilot pressed in while being but no ignition turned to PILOT/IGN position...
  • Page 24 TROUBLE- SHOOTING Continued OBSERVED POSSIBLE PROBLEM CAUSE Burner(s) does not 1. Burner orifice(s) is light after ODS/pilot clogged is lit 2. Burner orifice(s) diameter is too small 3. Inlet gas pressure is too low Delayed ignition of 1. Manifold pressure is burner(s) too low 2.

  • Page 25: Technical Service

    2. Gas leak. See Warn- ing statement at top of page You may have further questions about installation, operation, or troubleshooting. If so, contact DESA International’s Technical Service Department at 1-800-323- 5190. WARNING REMEDY 1. Ventilate room. Stop...

  • Page 26: Specifications

    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 •...

  • Page 27: Parts Centrals

    816-842-3911 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. 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.

  • Page 28: Illustrated Parts Breakdown And Parts List

    ILLUSTRATED PARTS BREAKDOWN Model CGN18R HEATER EXPLODED VIEW 13-16 13-17 ODS/PILOT 13-10 13-11 13-4 13-12 13-15 13-5 13-13 BURNER ASSEMBLY 13-1 13-2 13-3 13-6 13-7 13-14 13-8 13-9 099434...
  • Page 29 PARTS LIST Model CGN18R 13-1 13-2 13-3 13-4 13-5 13-6 13-7 13-8 13-9 13-10 13-11 13-12 13-13 13-14 13-15 13-16 13-17 099434 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.
  • Page 30 ILLUSTRATED PARTS BREAKDOWN Model CGN30C HEATER EXPLODED VIEW 13-16 13-17 ODS/PILOT 13-9 13-11 13-4 13-5 13-15 13-7 13-13 BURNER ASSEMBLY 13-1 13-2 13-3 13-12 13-6 13-14 13-8 13-10 099434...
  • Page 31 PARTS LIST Model CGN30C 13-1 13-2 13-3 13-4 13-5 13-6 13-7 13-8 13-9 13-10 13-11 13-12 13-13 13-14 13-15 13-16 13-17 099434 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. PART NUMBER DESCRIPTION...

  • Page 32: Warranty Information

    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.

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