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Desa CGN20 - page 1
BLUE-FLAME VENT -FREE NA TURAL GAS HEA TER OWNER’S OPERA TION AND INST ALLA TION MANUAL Models: CGN20, CGN20L, and RN30D ® 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 liq ...
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Desa CGN20 - page 2
2 103568 VENT -FREE NA TURAL GAS HEA TERS BLUE-FLAME CGN20, CGN20L AND RN30D LOCAL CODES 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*. *Available from: American National Standards Institute, Inc. 1430 Broadway New York, ...
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Desa CGN20 - page 3
3 103568 OWNER’S MANUAL PRODUCT IDENTIFICA TION Figure 1 - Vent-Free Natural Gas Heater Grill Guard Ignitor Button Control Knob Front Panel Heat Shield (RN30D) or Glass Panel (CGN20[L]) AIR FOR COMBUSTION AND VENTILA TION Today’s homes are built more energy effi- cient than ever. New materials, increased insulation, and new construction methods ...
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Desa CGN20 - page 4
4 103568 VENT -FREE NA TURAL GAS HEA TERS BLUE-FLAME CGN20, CGN20L AND RN30D AIR FOR COMBUSTION AND VENTILA TION Continued WARNING: If the area in which the heater may be operated is smaller than that defined as an unconfined space, provide ad- equate combustion and ventila- tion air by one of the methods described in the National Fuel Gas Code, AN ...
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Desa CGN20 - page 5
5 103568 OWNER’S MANUAL Figure 2 - Ventilation Air from Inside Building Or Remove Door into Adjoining Room, Option 3 Ventilation Grills Into Adjoining Room, Option 2 12" 12" Ventilation Grills into Adjoining Room, Option 1 AIR FOR COMBUSTION AND VENTILA TION Continued Outlet Air Ventilated Attic Outlet Air Inlet Air Inlet Air Ventilated ...
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Desa CGN20 - page 6
6 103568 VENT -FREE NA TURAL GAS HEA TERS BLUE-FLAME CGN20, CGN20L AND RN30D INST ALLING TO W ALL 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: • pipin ...
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Desa CGN20 - page 7
7 103568 OWNER’S MANUAL Continued INST ALLING TO W ALL Continued 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. Mounting Bracket Figure 5 - Mounting Bracket Location Figure 6 - Removing Front Panel Of Heater Removing ...
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Desa CGN20 - page 8
8 103568 VENT -FREE NA TURAL GAS HEA TERS BLUE-FLAME CGN20, CGN20L AND RN30D Figure 11 - Installing Bottom Mounting Screws Figure 10 - Mounting Heater Onto Mounting Bracket INST ALLING TO W ALL Continued Mounting Bracket (attached to wall) Horizontal Slots Stand-Out Tab CONNECTING TO GAS SUPPL Y NOTICE: A qualified service per- son must connect hea ...
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Desa CGN20 - page 9
9 103568 OWNER’S MANUAL Install sediment trap in supply line as shown in Figure 12, page 8. Locate sediment trap where it is within reach for cleaning. Locate sediment trap where trapped matter is not likely to freeze. A sediment trap traps mois- ture and contaminants. This keeps them from going into heater controls. If sediment trap is not insta ...
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Desa CGN20 - page 10
10 103568 VENT -FREE NA TURAL GAS HEA TERS BLUE-FLAME CGN20, CGN20L AND RN30D Thermocouple Ignitor Electrode Pilot Burner OPERA TING HEA TER FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: If you do not fol- low these instructions exactly, a fire or explosion may result caus- ing property damage, personal injury or loss of life. A. This appliance has ...
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Desa CGN20 - page 11
11 103568 OWNER’S MANUAL CLEANING AND MAINTENANCE WARNING: Turn off heater and let cool before cleaning. CAUTION: You must keep control areas, burner, and circu- lating air passageways of heater clean. Inspect these areas of heater before each use. Have heater inspected yearly by a quali- fied service person. Heater may need more frequent cleanin ...
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Desa CGN20 - page 12
12 103568 VENT -FREE NA TURAL GAS HEA TERS BLUE-FLAME CGN20, CGN20L AND RN30D OBSERVED PROBLEM When ignitor button is pressed, there is no spark at ODS/pilot When ignitor button is pressed, there is spark at ODS/pilot but no ignition ODS/pilot lights but flame goes out when control knob is released Burner does not light after ODS/pilot is lit Delay ...
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Desa CGN20 - page 13
13 103568 OWNER’S MANUAL TROUBLESHOOTING Continued OBSERVED PROBLEM Burner backfiring during combustion Yellow flame during burner combustion Slight smoke or odor during initial opera- tion Heater produces a whistling noise when burner is lit POSSIBLE CAUSE 1. Burner orifice is clogged or damaged 2. Inlet gas pressure is too low 3. Burner damaged ...
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Desa CGN20 - page 14
14 103568 VENT -FREE NA TURAL GAS HEA TERS BLUE-FLAME CGN20, CGN20L AND RN30D 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 instruct ...
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Desa CGN20 - page 15
15 103568 OWNER’S MANUAL TECHNICAL SER VICE You may have further questions about in- stallation, operation, or troubleshooting. If so, contact DESA International’s Techni- cal Service Department at 1-800-323-5190. SPECIFICA TIONS When gas pressure is too low • pilot will not stay lit • burner will have delayed ignition • heater will not p ...
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Desa CGN20 - page 16
16 103568 VENT -FREE NA TURAL GAS HEA TERS BLUE-FLAME CGN20, CGN20L AND RN30D 1 2 4 5 6 7 8 8 9 10 11 12 15 17 19 21 22 23 24 20 27 26 18 14 16 25 3 13 10-1 10-2 ODS/Pilot RN30D ILLUSTRA TED PA R T S BREAKDOWN ...
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Desa CGN20 - page 17
17 103568 OWNER’S MANUAL P ARTS LIST RN30D This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 15 of this manual. KEY PART NO. NUMBER DESCRIPTION QTY. 1 098304-01 Screw, #10 x 3/8" 2 2 098345-01AC Front Panel 1 3 103476-02 Grill Guard 1 4 101108-01 Clip ...
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Desa CGN20 - page 18
18 103568 VENT -FREE NA TURAL GAS HEA TERS BLUE-FLAME CGN20, CGN20L AND RN30D 12-1 12-2 ODS/Pilot 1 2 3 4 5 6 7 8 9 10 10 11 12 13 14 17 19 27 21 23 24 25 26 22 29 28 20 16 18 15 CGN20 CGN20L ILLUSTRA TED PA R T S BREAKDOWN ...
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Desa CGN20 - page 19
19 103568 OWNER’S MANUAL This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 15 of this manual. KEY PART NO. NUMBER DESCRIPTION QTY. 1 098304-01 Screw, #10 x 3/8" 2 2 098742-03 Front Panel (CGN20) 1 098742-19 Front Panel, Ivory (CGN20L) 1 3 103476-01 Gr ...
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Desa CGN20 - page 20
20 103568 VENT -FREE NA TURAL GAS HEA TERS BLUE-FLAME CGN20, CGN20L AND RN30D Note: Use only original replacement parts. This will protect your warranty coverage 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 C ...
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Desa CGN20 - page 21
21 103568 OWNER’S MANUAL NOTES _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _____________________________ ...
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Desa CGN20 - page 22
22 103568 VENT -FREE NA TURAL GAS HEA TERS BLUE-FLAME CGN20, CGN20L AND RN30D NOTES _______________________________________________________________________________________________ _______________________________________________________________________________________________ __________________________________________________________________________ ...
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Desa CGN20 - page 23
23 103568 OWNER’S MANUAL NOTES _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _____________________________ ...
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Desa CGN20 - page 24
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. W ARRANTY INFORMA TION 103568-0 ...
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