OWNER’S MANUAL BLUE FLAME VENT-FREE NATURAL GAS HEATER OWNER’S OPERATION AND INSTALLATION MANUAL CGN20TA ® Heater Size: 20,000 Btu/Hr Thermostat 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 WARNING: This is an unvented gas-fired heater.
CGN20TA Blue Flame Vent-Free Natural Gas Heater SAFETY INFORMATION WARNING ICON G 001 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. 6. WARNING: Any change to this heater or its controls can be dangerous. 7. 1. 2.
OWNER’S MANUAL PRODUCT IDENTIFICATION Ignitor Button Control Knob Grill Guard Glass Panel Heater Cabinet Front Panel Figure 1 - Vent-Free Natural Gas Heater 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, also known as NFPA 54*. *Available from: American National Standards Institute, Inc. 1430 Broadway New York, NY 10018 National Fire Protection Association, Inc.
CGN20TA Blue Flame Vent-Free Natural Gas Heater FRESH AIR FOR COMBUSTION AND VENTILATION WARNING: 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. New materials, increased insulation, and new construction methods help reduce heat loss in homes.
OWNER’S MANUAL FRESH AIR FOR COMBUSTION AND VENTILATION 2. Continued 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 Height = __________ cu. ft.
CGN20TA Blue Flame Vent-Free Natural Gas Heater FRESH AIR FOR COMBUSTION AND VENTILATION 12" Continued WARNING: If the area in which the heater may be operated is smaller than that defined as an unconfined space, provide adequate combustion and ventilation air by one of the methods described in the National Fuel Gas Code, ANSI Z223.1, 1992, Section 5.3 or applicable local codes.
OWNER’S MANUAL INSTALLATION 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 gas, do not install heater. Call dealer where you bought heater for proper type heater.
CGN20TA Blue Flame Vent-Free Natural Gas Heater INSTALLATION Continued THERMOSTAT SENSING BULB The thermostat sensing bulb has been placed inside the heater for protection during shipping. INSTALLING HEATER TO WALL Methods For Attaching Mounting Bracket To Wall Mounting Bracket 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.
OWNER’S MANUAL INSTALLATION Continued 3. 4. Attaching Mounting Bracket To Wall Note: Wall anchors, mounting screws, and spacers are in hardware package. The hardware package is provided with heater. Insert wall anchor (wings first) into hole. Tap anchor flush to wall. 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! For thick walls (over 1/2" thick) or solid walls, do not pop open wings.
CGN20TA Blue Flame Vent-Free Natural Gas Heater CONNECTING TO GAS SUPPLY 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 of large enough diameter to allow proper gas volume to heater. If pipe is too small, undue loss of pressure will occur. NOTICE: A qualified service person must connect heater to gas supply. Follow all local codes. WARNING: Never connect heater to private (non-utility) gas wells.
OWNER’S MANUAL CHECKING GAS CONNECTIONS WARNING: Test all gas piping and connections for leaks after installation or servicing. Correct all leaks at once. Test Pressures Equal To or Less Than 1/2 PSIG 1. 2. 3. 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 4. Close manual shutoff valve (see Figure 14).
CGN20TA Blue Flame Vent-Free Natural Gas Heater FOR YOUR SAFETY READ BEFORE LIGHTING LIGHTING INSTRUCTIONS 1. 2. 3. 5. 6. Ignitor Button 7. 8. Note: If pilot does not stay lit, refer to Troubleshooting, pages 14 through 16. 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, page 13. Keep control knob pressed in for 30 seconds after lighting pilot.
OWNER’S MANUAL BURNER FLAME PATTERN OPERATING HEATER INSPECTING BURNER Continued Check pilot flame pattern and burner flame pattern often. THERMOSTAT CONTROL OPERATION The thermostatic control used on these models differs from standard thermostats. Standard thermostats simply turn on and off the burner. The thermostat used on this heater senses the room temperature. The thermostat adjusts the amount of gas flow to the burner. This increases or decreases the burner flame height.
CGN20TA Blue Flame Vent-Free Natural Gas Heater TROUBLESHOOTING Note: All troubleshooting items are listed in order of operation. WARNING: Turn off and unplug heater and let cool before servicing. Only a qualified service person should service and repair heater. CAUTION: Never use a wire, needle, or similar object to clean ODS/pilot. This can damage ODS/ pilot unit. OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignitor button is pressed, there is no spark at ODS/pilot 1.
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 (see Cleaning and Maintenance, page 17) or replace burner orifice 2. Replace burner orifice 3. Contact local natural gas company 2. Burner orifice diameter is too small 3. Inlet gas pressure is too low Delayed ignition of burner 1. Manifold pressure is too low 2. Burner orifice is clogged 1. Contact local natural gas company 2.
CGN20TA Blue Flame Vent-Free Natural Gas Heater TROUBLESHOOTING Continued 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 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.
OWNER’S MANUAL CLEANING AND MAINTENANCE WARNING: Turn off heater and let cool before cleaning. 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 • Use a vacuum cleaner, pressurized air, or small, soft bristled brush to clean.
CGN20TA Blue Flame Vent-Free 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 203-248-7553 Parts Department Washer Equipment Co. 1715 Main Street Kansas City, MO 64108 KS, MO, AR 816-842-3911 Portable Heater Parts 342 N. County Rd.
OWNER’S MANUAL ACCESSORIES Purchase these heater accessories from your local dealer. If they can not supply these accessories, either contact your nearest Parts Central (see page 18) or call DESA International’s Parts Department at 1-800972-7879 for referral information. You can also write to the address listed on the back page of this manual. FAN KITS - GA3100A AND GA3200TA For all models. Provides better heat distribution. Makes heater more efficient.
CGN20TA Blue Flame Vent-Free Natural Gas Heater ILLUSTRATED PARTS BREAKDOWN CGN20TA 22 23 21 26 10 24 13 12 4 10 11 25 14 18 16 15 20 7 19 9 6 3 5 17 8 2 12-1 12-2 1 12 ODS/Pilot Assembly 20 104190
OWNER’S MANUAL PARTS LIST This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 17 of this manual. CGN20TA KEY NO.
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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 written warranty. We make no other warranty, expressed or implied.
