Desa CGB35N manual

Save this manual for future reference. WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, per- sonal injury, or loss of life. FOR YOUR SAFETY — Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. — WHAT TO DO I[...]

2 100351 CONTENTS SECTION PAGE Safety Information ......................................................................... 3 Product Identification .................................................................... 5 Local Codes ................................................................................... 6 Unpacking ......................[...]

3 100351 SAFETY INFORMA TION WARNING ICON G 001 W ARNINGS IMPORTANT: Read this owner’s manual carefully and completely be- fore 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. WARNING ICON G 001 DANGER C[...]

4 100351 SAFETY INFORMA TION Continued WARNING ICON G 001 W ARNINGS Continued 6. Provide the following minimum heater clearances from combustibles (as viewed from the front of heater): Front: 48 inches Back: 6 inches Top: 53 inches Right Side: 12 inches Left Side: 6 inches 7. Do not run heater • where flammable liquids or vapors are used or store[...]

5 100351 Control Knob Ignitor Button Draft Hood Outlet for Venting System Figure 2 - Vented Natural Gas Heater, Rear View Figure 1 - Vented Natural Gas Heater Control Valve Lower Front Access Panel PRODUCT IDENTIFICA TION[...]

6 100351 Install and use heater with care. Follow all local codes. In the absence of local codes, use the latest edition of the following: • National Fuel Gas Code ANSI Z223.1, also known as NFPA 54 * • National Electrical Code ANSI/NFPA 70 * *Available from: American National Standards Institute, Inc. 1430 Broadway New York, NY 10018 National [...]

7 100351 INST ALLING HEA TER Continued LOCATING HEATER WARNING ICON G 001 W ARNING Maintain the minimum clearances shown in Figure 3, below. If you can, provide greater clearances. WARNING ICON G 001 W ARNING Never install the heater • in a mobile home or a recreational vehicle. • where curtains, furniture, clothing, or other flam- mable object[...]

8 100351 Note: Venting/chimney materials are not supplied with heater. VENTING HEATER INST ALLING HEA TER Continued WARNING ICON G 001 W ARNING This heater has a vent safety shut-off system. This system shuts off the heater gas supply if you do not vent heater properly or the venting system is blocked. Do not operate heater if not properly vented. [...]

9 100351 INST ALLING HEA TER Continued VENTING HEATER (continued) WARNING ICON G 001 W ARNING Do not vent heater in any of the following ways (see Figure 4). Heater must be vented to the out- doors. Never vent heater to another room or inside a building. The vertical section of vent pipe must extend at least two feet above the highest point of any [...]

10 100351 VENTING HEATER (continued) INST ALLING HEA TER Continued Proper Size Vent To safely vent heater, the vent connector pipe must be the same diameter as the draft hood outlet on the rear of the heater. Pipe that is too small can cause flue gas to spill from the heater. Fasten vent connector to the draft hood outlet with a sheet metal screw. [...]

11 100351 INST ALLING HEA TER Continued CONNECTING TO GAS SUPPLY WARNING ICON G 001 W ARNING A qualified service person must connect heater to gas supply. Follow all local codes. WARNING ICON G 001 W ARNING Never connect heater to private (non-utility) gas wells. This gas is commonly known as well-head gas. IMPORTANT: Check gas line pressure at gas[...]

12 100351 Figure 7 - Gas Connection * An A.G.A. design-certified manual shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Purchase the optional A.G.A. design-certified manual shutoff valve from your dealer. See Accessories , page 35. ** For purposes of input adjustment. Installation must include a manual sh[...]

13 100351 INST ALLING HEA TER Continued CHECKING GAS CONNECTIONS Pressure Testing Gas Supply Piping System Test Pressures In Excess of 1/2 PSIG 1. Disconnect heater and its individual manual shutoff valve from gas supply pipe. Pressures in excess of 1/2 PSIG will damage heater regulator. 2. Cap off open end of gas pipe where manual shutoff valve wa[...]

14 100351 INST ALLING HEA TER Continued INSTALLING GLASS PANEL 1. Locate the glass panel package inside the back of the heater. WARNING ICON G 001 CAUTION Before installing glass panels, inspect the edges. If you notice any chips or cracks, do not install. If the surface on either side is deeply scratched, do not install. If these conditions exist,[...]

15 100351 INST ALLING HEA TER Continued 2 1 Glass Panel Lower Glass Retaining Channel Figure 11 - Inserting Top Edge of Glass Panel into Upper Glass Retaining Channel 2 1 Glass Panel Lower Glass Retaining Channel Upper Glass Retaining Channel Lower Front Access Area Figure 12 - Inserting Glass into Lower Retaining Channel 7. Lower glass into lower [...]

16 100351 FRESH AIR FOR COMBUSTION AND VENTILA TION WARNING ICON G 001 W ARNING This heater must have fresh air for proper operation. If not, poor fuel combustion and improper venting of flue gases will result. Carbon monoxide poisoning from backed-up flue gases could occur. Read the following instructions to insure proper fresh air for this and ot[...]

17 100351 FRESH AIR FOR COMBUSTION AND VENTILA TION Continued Typical Water Heater Match Draft Hood Vent Pipe Heater Match Draft Hood Opening Vent Pipe Figure 13 - Checking for Draft Spillage No Draft Hood Spillage: This shows there is enough fresh air in area for appliances. Turn off all exhaust fans and appliances if desired. DETERMINING FRESH-AI[...]

18 100351 FRESH AIR FOR COMBUSTION AND VENTILA TION Continued Figure 14 - Ventilation Air from Outdoors IMPORT ANT Do not provide openings for inlet or outlet air into attic if attic has a thermostat controlled power vent. Chimney or Gas Vent Outlet Air Ventilated Attic Outlet Air Inlet Air Inlet Air Ventilated Crawl Space To Crawl Space To Attic D[...]

19 100351 FRESH AIR FOR COMBUSTION AND VENTILA TION Continued Figure 15 - Ventilation Air from Inside Building Example 2: Locating Heater in Confined (Closed) Area NOTICE A confined area has an air volume of less than 50 cubic feet for each 1000 BTU/Hr input rating of all appliances in the area (cubic feet equals length x width x height of area). I[...]

20 100351 OPERA TING HEA TER PILOT HIGH LOW DEPRESS FOR OFF Figure 16 - Control Knob and Ignitor Button Control Knob FOR YOUR SAFETY READ BEFORE LIGHTING NOTICE If operating heater for the first time, a slight odor will occur. This odor will go away after a few hours of operation. WARNING ICON G 001 W ARNING Heater and venting system surfaces are v[...]

21 100351 5. 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 20. If you don’t smell gas, go to the next step. 6. Turn control knob clockwise Clockwise to the PILOT position. Fully depress control knob for five seconds. Not[...]

22 100351 MANUAL LIGHTING PROCEDURE 1. Remove lower front access panel on heater. 2. Locate pilot. Pilot is attached to the front of burner. 3. Follow steps 1 through 6 under Lighting Instructions , pages 20 and 21. 4. With control knob depressed, strike match. Hold match to pilot until pilot lights. 5. Follow steps 8 through 11 under Lighting Inst[...]

23 100351 INSPECTING PILOT AND BURNER FLAME Check pilot flame pattern and burner flame pattern often. 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 prevent the thermocouple from getting hot, causing the heater[...]

24 100351 INSPECTING PILOT AND BURNER FLAME Continued Sharp Blue Flame High Yellow Flame Flame Lifting Off of Burner Figure 21 - Incorrect Burner Flame Patterns If burner flame pattern is incorrect, as shown in Figure 20 • turn heater off (see To Turn Off Gas to Appliance , page 22) • see Troubleshooting , pages 26 through 29. Figure 20 - Corre[...]

25 100351 WARNING ICON G 001 W ARNING Turn off heater and let cool before cleaning or servicing. WARNING ICON G 001 W ARNING Keep heater clear and free from combustible materials, gasoline, and other flammable vapors and liquids. WARNING ICON G 001 CAUTION You must keep control areas, burner, and circulating air passageways of heater clean. Inspect[...]

26 100351 TROUBLE- SHOOTING Note: All troubleshooting items are listed in order of operation. WARNING ICON G 001 W ARNING Turn off and unplug heater and let cool before servicing. Unless you need gas supply for testing, shut off manual shutoff valve before servicing. Only a qualified service person should service and repair heater and venting syste[...]

27 100351 TROUBLE- SHOOTING Continued Continued OBSERVED PROBLEM Pilot lights but flame goes out when control knob is released. Burner does not light after pilot is lit. Delayed ignition of burner. POSSIBLE CAUSE 1. Manual shutoff valve not fully open. 2. Control knob not fully pressed in. 3 . Control knob not pressed in long enough. 4. Safety inte[...]

28 100351 TROUBLE- SHOOTING Continued OBSERVED PROBLEM Burner backfiring during combustion. Yellow flame during burner combustion. Slight smoke or odor during initial operation. Burner fails to re- spond to thermostat. Heater produces a whistling noise when burner is lit. POSSIBLE CAUSE 1 . Burner orifice is clogged or damaged. 2. Burner damaged. 3[...]

29 100351 TROUBLE- SHOOTING Continued 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 supplie[...]

30 100351 SER VICE PROCEDURES Removing Control Valve and Burner Tube 1. Shut off gas supply to heater. 2. Remove lower front access panel on heater. 3. Disconnect burner tube from orifice holder (see Figure 22). 4. Remove pilot gas line from control valve (see Figure 22). 5. Disconnect wire connec- tors from thermocouple interrupter (see Figure 22)[...]

31 100351 SER VICE PROCEDURES Continued Removing Burner 1. Shut off gas supply to heater. 2. Remove lower front access panel on heater. 3. Disconnect burner tube from orifice holder (see Figure 23). 4. Remove orifice holder from burner (see Figure 23). 5. Remove pilot burner bracket nuts and remove pilot assembly (see Figure 23). 6. Move burner to [...]

32 100351 SER VICE PROCEDURES Continued Changing Burner Orifice 1. Shut off gas supply to heater. 2. Remove lower front access panel on heater. 3. Disconnect burner tube from orifice holder (see Figure 24). 4. Remove orifice holder from burner (see Figure 24). 5. Use socket or open-end wrench to remove the old orifice from the orifice holder. 6. Cl[...]

33 100351 TECHNICAL SER VICE You may have further questions about installation, operation, or troubleshooting. If so, contact DESA International’s Technical Service Department at 1-800-323- 5190. 35,000 BTU/Hr 50,000 BTU/Hr Model Model BTU 35,000 50,000 Type Gas Natural Only Natural Only Ignition Piezo Piezo Pressure Regulator Setting 3.5" W[...]

34 100351 Note: Use only original replacement parts. This will protect your warranty cover- age for parts replaced under warranty. Parts Under Warranty Contact your nearest dealer or call DESA International’s Technical Service De- partment at 1-800-323-5190. When calling DESA International, have ready • your name • your address • model numb[...]

35 100351 ACCESSORIES BLOWER KIT - PART NUMBER GA6010 For all models. Provides better heat distribution. Makes heater more efficient. Complete installation and operating instructions provided with blower. Purchase these heater accessories from your local dealer. If they can not supply these accessories, either contact your nearest Parts Central (se[...]

36 100351 ILLUSTRA TED P ARTS LIST Burner Assembly 3 4 8 10 11 1 2 5 6 7 9 12 13 14 15 16 17 18 19 28 27 7 35 Model 6 50 Model 11 24-2 20 21 23 26 22 17 16 4 24 24-1 24-3 24-4 25 7[...]

37 100351 P ARTS LIST Burner Assembly This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Ordering Replacement Parts on page 34 of this manual. KEY PART NUMBER FOR NO. CGB50N CGB35N DESCRIPTION QTY. 1 100206-02 100206-01 Combustion Chamber 1 2 098324-02 098324-02 Control Knob 1 3 09715[...]

38 100351 ILLUSTRA TED P ARTS LIST Cabinet Assembly This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Ordering Replacement Parts on page 34 of this manual. 1 2 3 4 5 6 6 7 8 11 6 10 9 PART NUMBER FOR KEY NO. CGB50N CGB35N DESCRIPTION QTY. 1 100202-02 100202-01 Lower Front Panel 1 2 0[...]

39 100351 NOTES _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ ____[...]

40 100351 LIMITED WARRANTY COMFORT GLOW VENTED NATURAL GAS HEATERS LIMITED ONE YEAR WARRANTY This DESA product is warranted to the original purchaser to be free from defect in material and workmanship under normal use and maintenance for a period of one year from the date of installation whether or not actual use begins on that date. It is the resp[...]