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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: This is an
WARNING: If the information in this manual is not
unvented gas-fired heater. It
followed exactly, a fire or explosion may result
uses air (oxygen) from the
causing property damage, personal injury, or loss
of life. room in which it is installed.
Provisions for adequate
— Do not store or use gasoline or other flammable
combustion must
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CGN20TA Blue Flame Vent-Free Natural Gas Heater 6. Keep air openings in front and bottom SAFETY WARNING: Any change to this of heater clear and free of debris. This INFORMATION heater or its controls can be dan- will ensure enough air for proper com- gerous. bustion. 7. If heater shuts off, do not relight until WARNINGS WARNING ICON G 001 1. This appliance is only for use with the you provide fresh, outside air. If heater type of gas indicated on the rating plate. keeps shutting off, have it s
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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 PRODUCT UNPACKING 1. Remove heater from carton. FEATURES Install and use heater with care. Follow all local codes. In the absence of local codes, 2. Remove all protective packaging ap- Safety Device use the latest edition of the National Fuel plied to heater for shipment. Gas Code ANSI Z223, also known as NFPA This heater has a p
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CGN20TA Blue Flame Vent-Free Natural Gas Heater Confined and Unconfined Space PROVIDING ADEQUATE FRESH AIR FOR VENTILATION The National Fuel Gas Code (ANSIZ2123.1, COMBUSTION AND 1992 Section 5.3) defines a confined space The following is exerpts from National Fuel VENTILATION as a space whose volume is less than 50 Gas Code. NFPA 54/ANSI Z223.1, Section 3 cubic feet** per 1,000 Btu per hour (4.8 m 5.3, Air for Combustion and Ventilation. per kw) of the aggregate input rating of all WARNING: Th
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OWNER’S MANUAL 2. Divide the space volume by 50 cubic 4. Compare the maximum Btu/Hr the FRESH AIR FOR feet to determine the maximum Btu/Hr space can support with the actual COMBUSTION AND the space can support. amount of Btu/Hr used. _______________ (volume of space) __________Btu/Hr (maximum the VENTILATION ÷ 50 cu. ft. = (Maximum Btu/Hr the space can support) Continued space can support) __________ Btu/Hr (actual amount of Example: 2560 cu. ft. (volume of Btu/Hr used) DETERMINING FRESH-AIR sp
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CGN20TA Blue Flame Vent-Free Natural Gas Heater FRESH AIR FOR COMBUSTION AND 12" VENTILATION Continued WARNING: If the area in which Ventilation Grills the heater may be operated is Into Adjoining Room, Ventilation smaller than that defined as an Option 2 Grills Or unconfined space, provide ad- into Adjoining Remove equate combustion and ventila- Room, Door into tion air by one of the methods Option 1 Adjoining described in the National Fuel Room, Option 3 Gas Code, ANSI Z223.1, 1992, Sec
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OWNER’S MANUAL IMPORTANT: Vent-free heaters add mois- INSTALLATION WARNING: Never install the ture to the air. Although this is beneficial, heater installing heater in rooms without enough NOTICE: A qualified service per- • in a bedroom or a bathroom ventilation air may cause mildew to form from son must install heater. Follow • in a recreational vehicle too much moisture. See Fresh Air for Com- all local codes. • where curtains, furniture, bustion and Ventilation, pages 4 through 6. clothing,
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CGN20TA Blue Flame Vent-Free Natural Gas Heater Methods For Attaching INSTALLING HEATER TO INSTALLATION Mounting Bracket To Wall WALL Continued Only use last hole on each end of mounting Mounting Bracket THERMOSTAT SENSING bracket to attach bracket to wall. These two BULB The mounting bracket is located on back holes are 16 inches apart from their centers. panel of heater. It has been taped there for Attach mounting bracket to wall in one of The thermostat sensing bulb has been placed shipping.
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OWNER’S MANUAL 3. Insert wall anchor (wings first) into Installing Bottom Mounting INSTALLATION hole. Tap anchor flush to wall. Screws Continued 4. For thin walls (1/2" or less), insert red 1. Locate two bottom mounting holes. Attaching Mounting Bracket To key into wall anchor. Push red key to These holes are near bottom on back “pop” open anchor wings. Wall panel of heater (see Figure 12). IMPORTANT: Do not hammer key! 2. Mark screw locations on wall. Note: Wall anchors, mounting screws, and Fo
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CGN20TA Blue Flame Vent-Free Natural Gas Heater Apply pipe joint sealant lightly to male CONNECTING TO threads. This will prevent excess sealant CAUTION: Use only new, GAS SUPPLY black iron or steel pipe. Inter- from going into pipe. Excess sealant in pipe could result in clogged heater valves. nally-tinned copper tubing may NOTICE: A qualified service per- be used in certain areas. Check son must connect heater to gas CAUTION: Use pipe joint seal- your local codes. Use pipe of large supply. Fo
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OWNER’S MANUAL Test Pressures Equal To or PRESSURE TESTING CHECKING GAS Less Than 1/2 PSIG HEATER GAS CONNECTIONS 1. Close manual shutoff valve (see Fig- CONNECTIONS ure 14). 1. Open manual shutoff valve (see Fig- WARNING: Test all gas pip- 2. Pressurize supply piping system by ei- ure 14). ing and connections for leaks ther using compressed air or opening 2. Open main gas valve located on or near after installation or servicing. main gas valve located on or near gas gas meter. Correct all leak
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OFF HI CGN20TA Blue Flame Vent-Free Natural Gas Heater Note: If pilot does not stay lit, refer LIGHTING OPERATING to Troubleshooting, pages 14 through INSTRUCTIONS HEATER 16. Also contact a qualified service 1. STOP! Read the safety information person or gas supplier for repairs. above. FOR YOUR SAFETY Until repairs are made, light pilot with READ BEFORE 2. Make sure manual shutoff valve is match. To light pilot with match, see fully open. Manual Lighting Procedure, page 13. LIGHTING 3. Turn con
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OWNER’S MANUAL BURNER FLAME PATTERN OPERATING INSPECTING Figure 20 shows a correct burner flame HEATER BURNER pattern. Figure 21 shows an incorrect burner Continued Check pilot flame pattern and burner flame flame pattern. The incorrect burner flame pattern often. pattern shows yellow tipping of the flame. It THERMOSTAT CONTROL also shows the flame higher than 1/2 the PILOT FLAME PATTERN OPERATION glass panel height. Figure 18 shows a correct pilot flame pat- The thermostatic control used on the
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CGN20TA Blue Flame Vent-Free Natural Gas Heater TROUBLESHOOTING WARNING: Turn off and un- CAUTION: Never use a wire, plug heater and let cool before needle, or similar object to clean Note: All troubleshooting items are listed in servicing. Only a qualified ser- ODS/pilot. This can damage ODS/ order of operation. vice person should service and pilot unit. repair heater. OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignitor button is pressed, there is no 1. Ignitor electrode positioned wrong 1. R
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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 Mainte- nance, page 17) or replace burner orifice 2. Burner orifice diameter is too small 2. Replace burner orifice 3. Inlet gas pressure is too low 3. Contact local natural gas company Delayed ignition of burner 1. Manifold pressure is too low 1. Contact local natural gas company 2. Burner orifice is clogged 2
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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. Cleaning supplies
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OWNER’S MANUAL CLEANING SPECIFICATIONS CGN20TA AND Btu (Variable) 10,000/20,000 MAINTENANCE Type Gas Natural Only Ignition Piezo Pressure Regulator Setting 3" W.C. WARNING: Turn off heater Inlet Gas Pressure (in. of water) and let cool before cleaning. Maximum 10.5" Minimum 4" Dimensions, Inches (H x W x D) Heater 23.5 x 18.5 x 8.0 CAUTION: You must keep Carton 25.8 x 21.3 x 10.1 control areas, burner, and circu- Weight (pounds) lating air passageways of heater Heater 22 clean. Inspect these a
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CGN20TA Blue Flame Vent-Free Natural Gas Heater These Parts Centrals are privately owned businesses. They have agreed to support our PARTS CENTRALS customer’s needs by providing original replacement parts and accessories. Baltimore Electric Washer Equipment Co. Dayton Hardware 1348 Dixwell Avenue 1715 Main Street P.O. Box 275 Hamden, CT 06514 Kansas City, MO 64108 North Dayton Station 1-800-397-7553 KS, MO, AR Dayton, OH 45404 203-248-7553 816-842-3911 All States Parts Department 513-258-3721 Ea
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OWNER’S MANUAL FAN KITS - GA3100A AND ACCESSORIES GA3200TA Purchase these heater accessories from your local dealer. If they can not supply these For all models. Provides better heat distri- accessories, either contact your nearest Parts bution. Makes heater more efficient. Com- plete installation and operating instructions Central (see page 18) or call DESA included. International’s Parts Department at 1-800- 972-7879 for referral information. You can Manually controlled - GA3100A. Includes als
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CGN20TA Blue Flame Vent-Free Natural Gas Heater ILLUSTRATED PARTS BREAKDOWN CGN20TA 22 23 21 26 10 24 13 12 25 4 14 10 16 20 15 11 18 7 19 9 6 3 5 17 8 2 12-1 12-2 1 12 ODS/Pilot Assembly 104190 20
