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BLUE FLAME VENT-FREE NATURAL GAS HEATER
OWNER'S OPERATION AND INSTALLATION MANUAL
®
Heater Sizes: 18,000 Btu/Hr Thermostat, and
28,000 Btu/Hr Thermostat "B" Model Heaters
WARNING: If the information in this manual is not followed exactly, a fire or
explosion may result causing property damage, personal injury, or loss of life.
— Do not store or use gasoline or other flammable vapors and liquids in the
vicinity of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor's phone. Follow the gas
supplier's instructions.
• 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.
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.
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Table of Contents
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Summary of Contents for Comfort Glow 18
- Page 1 BLUE FLAME VENT-FREE NATURAL GAS HEATER OWNER’S OPERATION AND INSTALLATION MANUAL ® Heater Sizes: 18,000 Btu/Hr Thermostat, and 28,000 Btu/Hr Thermostat “B” Model Heaters WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury, or loss of life.
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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 Warnings
SAFETY INFORMATION Continued 101808 WARNINGS WARNING ICON G 001 WARNING: Any change to this heater or its controls can be dangerous. 1. This appliance is only for use with the type of gas indicated on the rating plate. This appliance is not convertible for use with other gases. 2. -
Page 4: Product Identification
Front Panel Figure 1 - Vent-Free Natural Gas Heater (28,000 Btu/Hr Model Shown) Install and use heater with care. Follow all local codes. In the absence of local codes, use the latest edition of the National Fuel Gas Code ANSI Z223, also known as NFPA 54*. -
Page 5: Fresh Air For Combustion And Ventilation
FRESH AIR COMBUSTION VENTILATION 101808 WARNING ICON G 001 This heater shall not be installed in a confined space unless provisions are provided for adequate combustion and ventilation air. Read the following 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. - Page 6 You will need no additional fresh air ventilation. cu. ft. (volume of space) 50 cu. ft. = (Maximum Btu/Hr 51.2 or 51,200 (maximum ___________________ Btu/Hr ___________________ Btu/Hr ___________________ Btu/Hr ___________________ Btu/Hr ___________________ Btu/Hr + ___________________ Btu/Hr = ___________________ Btu/Hr 40,000 Btu/Hr 18,000 Btu/Hr 58,000 Btu/Hr 101808...
- Page 7 FRESH AIR COMBUSTION VENTILATION Continued 101808 WARNING ICON G 001 If the area in which the heater may be operated is smaller than that defined as an unconfined space, provide adequate combus- tion and ventilation air by one of the methods described in the National Fuel Gas Code, ANSI Z223.1, 1992, Section 5.3.
- Page 8 FRESH AIR COMBUSTION VENTILATION Continued Ventilation Air From Outdoors Provide extra fresh air by using ventilation grills or ducts. You must provide two permanent openings: one within 12" of the ceiling and one within 12" of the floor. Connect these items directly to the outdoors or spaces open to the outdoors. These spaces include attics and crawl spaces.
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Page 9: Installing To Wall
INSTALLING TO WALL 101808 A qualified service person must install heater. Follow all local codes. CHECK GAS TYPE Use only natural gas. If your gas supply is not natural gas, do not install heater. Call dealer where you bought heater for proper type heater. INSTALLATION ITEMS Before installing heater, make sure you have the items listed below. - Page 10 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 101808 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 6 - Bracket Location Removing Front Panel Of Heater 1.
- Page 12 Figure 9 - Folding Anchor 3. Insert wall anchor (wings first) into hole. Tap anchor flush to wall. WARNING 7 1/4" 16" Min. Only Insert Mounting 18 3/4" Screws Through Last Min. Hole On Each End Floor 18,000 Btu/Hr Models 18 3/4" Min. 101808...
- Page 13 INSTALLING TO WALL Continued 101808 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 10 - Popping Open Anchor Wings For Thin Walls 5.
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Page 14: Connecting To Gas Supply
If pipe is too small, undue loss of pressure will occur. Typical Pipe Diameters 18,000 Btu/Hr Models 28,000 Btu/Hr Model 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 101808 IMPORTANT: Hold pressure regulator with wrench when connecting it to gas piping and/or fittings. Pressure Regulator 1/2" NPT Pipe Nipple Tee Joint Test Reducer Bushing to Gauge 1/8" NPT Connection * 1/8" NPT Plug Tap Tee Joint Sediment... - 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 101808 FOR YOUR SAFETY READ BEFORE LIGHTING WARNING ICON G 001 If you do not follow these instructions exactly, a fire or explo- sion 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.
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Page 18: Operating Heater
OPERATING HEATER 4. Wait five (5) minutes to clear out any gas. Then smell for gas, including near the floor. If you smell gas, STOP! Follow “B” in the safety information at the top of page 17. If you don’t smell gas, go to the next step. 5. -
Page 19: Manual Lighting Procedure
MANUAL LIGHTING PROCEDURE 1. Remove front panel (see Figure 7, page 11). 2. Follow steps 1 through 5 under Lighting Instructions, pages 17 and 18. 3. With control knob pressed in, strike match. Hold match to pilot until pilot lights. -
Page 20: Inspecting Burner
BURNER 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. - Page 21 INSPECTING BURNER Continued 101808 If pilot flame pattern is incorrect, as shown in Figure 19. • turn heater off (see To Turn Off Gas to Appliance, page 19). • see Troubleshooting, pages 22 through 25. BURNER FLAME PATTERN Figure 20 shows a correct burner flame pattern. Figure 21 shows an incorrect burner flame pattern.
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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 passage- ways of heater clean. Inspect these areas of heater before each use. - Page 23 TROUBLE- SHOOTING Continued 101808 OBSERVED POSSIBLE PROBLEM CAUSE When ignitor button 1. Gas supply turned off is pressed, there is or manual shutoff spark at ODS/pilot valve closed but no ignition 2. Control knob not in PILOT position 3. Control knob not pressed in while in PILOT position 4.
- Page 24 TROUBLE- SHOOTING Continued OBSERVED POSSIBLE PROBLEM CAUSE Burner does not light 1. Burner orifice is after ODS/pilot is lit clogged 2. Burner orifice diameter is too small 3. Inlet gas pressure is too low Delayed ignition of 1. Manifold pressure is burner too low 2.
- Page 25 TROUBLE- SHOOTING Continued 101808 WARNING ICON G 001 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. •...
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Page 26: Technical Service
Inlet Gas Pressure (in. of water) Maximum 10.5" Minimum 4" Dimensions, Inches (H x W x D) Heater 23.5 x 18.5 x 8.0 Carton 25.8 x 21.3 x 10.1 Weight (pounds) Heater Shipping When gas pressure is too low • pilot will not stay lit •... -
Page 27: Replacement Parts
REPLACEMENT PARTS PARTS CENTRALS 101808 Note: Use only original replacement parts. This will protect your warranty cover- age for parts replaced under warranty. Parts Under Warranty Contact authorized dealers of this product. If they can’t supply original replacement part(s), either contact your nearest Parts Central (see below) or call DESA International’s Technical Service Department at 1-800-323-5190 for referral information. -
Page 28: Illustrated Parts List
101808... -
Page 29: Parts List
PARTS LIST PART NUMBER FOR 18,000 Btu/Hr CGN18TB 098304-01 098742-03 098742-07 098197-01 098342-01 098533-01AA 098260-01 098532-01AA M11084-26 098352-01BR 098271-02 098249-01 099440-05 12-1 098514-01 12-2 098515-01 099120-02 098517-01 098251-02 098250-01 098867-04 099553-01 098518-01 098297-03 098264-02 098276-01 098277-01 098265-01 098275-01 098522-03 098530-01... -
Page 30: Accessories
Manually controlled - GA2100A, GA3100, and GA3100A. Includes ON/OFF switch. Thermostatically controlled - GA3200TA. Includes three settings: ON/OFF/AUTO. FLOOR MOUNTING STAND 18,000 Btu/Hr Models - GA4000B and GA4500 28,000 Btu/Hr Model - GA4010B and GA4510 For locating heater on the floor, away from a wall. - Page 31 NOTES _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ 101808...
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Page 32: Warranty Information
WARRANTY INFORMATION Model Serial No. Date Purchased Always specify model and serial numbers when communicating with the factory. We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our standard written warranty. We make no other warranty, expressed or implied. 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...