Desa GVC50NA 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 100749 CONTENTS SECTION PAGE Safety Information ......................................................................... 3 Product Identification .................................................................... 5 Local Codes ................................................................................... 6 Unpacking ......................[...]

3 100749 SAFETY INFORMA TION 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. DANGER Carbon monoxide poisoning may lead to d[...]

4 100749 SAFETY INFORMA TION Continued 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 stored • under dusty c[...]

5 100749 PRODUCT IDENTIFICA TION Figure 1 - Vented Natural Gas Heater Lower Front Access Panel Ignitor Button Control Knob Figure 2 - Vented Natural Gas Heater, Rear View Draft Hood Outlet for Venting System Blower (on models equipped with blower) Control Valve[...]

6 100749 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 * • National Standard of Canada C AN1-B149 ** *Available from: American National Standards Institute, I[...]

7 100749 INST ALLING HEA TER Continued LOCATING HEATER W ARNING Maintain the minimum clearances shown in Figure 3, below. If you can, provide greater clearances. W ARNING Never install the heater • in a mobile home or a recreational vehicle. • where curtains, furniture, clothing, or other flam- mable objects are less than 48 inches from the fro[...]

8 100749 Note: Venting/chimney materials are not supplied with heater. VENTING HEATER INST ALLING HEA TER Continued W ARNING When venting this heater, follow the safety information listed below. • Never vent heater to another room or inside a build- ing. Only vent heater to the outdoors. • Do not vent heater exhaust to a chimney or flue serving[...]

9 100749 INST ALLING HEA TER Continued VENTING HEATER (continued) 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 roof within ten fee[...]

10 100749 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 100749 INST ALLING HEA TER Continued CONNECTING TO GAS SUPPLY W ARNING A qualified service person must connect heater to gas supply. Follow all local codes. 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 meter before connecting heater to gas[...]

12 100749 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 31. ** For purposes of input adjustment. Installation must include a manual sh[...]

13 100749 INST ALLING HEA TER Continued CHECKING GAS CONNECTIONS W ARNING Test all gas piping and connections for leaks after install- ing or servicing. Correct all leaks at once. 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. Pressure[...]

14 100749 FRESH AIR FOR COMBUSTION AND VENTILA TION 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 other fuel-burning ap[...]

15 100749 FRESH AIR FOR COMBUSTION AND VENTILA TION Continued DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION Example 1: Locating Heater in Unconfined (Open) Area NOTICE An unconfined area has a minimum air volume of 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). Inc[...]

16 100749 FRESH AIR FOR COMBUSTION AND VENTILA TION Continued Figure 10 - Ventilation Air from Outdoors Draft Hood Spillage: This is a hazardous situation. Draft hood spillage re- leases poisonous carbon monoxide gas into your home. DANGER Carbon monoxide poisoning may lead to death! If draft hood spillage occurs, check for blocked flue connectors,[...]

17 100749 FRESH AIR FOR COMBUSTION AND VENTILA TION Continued After providing ventilation between rooms, check for draft hood spillage (see Draft Hood Spillage Test , page 15). If draft hood spillage still occurs, provide more ventilation between rooms or provide permanent ventilation from outdoors. See Providing Permanent Fresh-Air Ventilation, pa[...]

18 100749 OPERA TING HEA TER A. This appliance has a pilot which must be lighted by hand. When lighting the pilot, follow these instructions exactly. B. BEFORE LIGHTING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor. WHAT TO DO IF YOU SMELL GAS • Do[...]

19 100749 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 18. If you don’t smell gas, go to the next step. 6. Remove lower front access panel on heater. 7. Turn control knob clockwise Clockwise to the PILOT position. Fu[...]

20 100749 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 7 under Lighting Instructions , pages 18 and 19. 4. With control knob depressed, strike match. Hold match to pilot until pilot lights. 5. Follow steps 9 through 13 under Lighting Inst[...]

21 100749 INSPECTING PILOT AND BURNER FLAME Check pilot flame pattern and burner flame pattern often. PILOT FLAME PATTERN Figure 14 shows a correct pilot flame pattern. Figure 15 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[...]

22 100749 Figure 16 - Correct Burner Flame Pattern Sharp Blue Flame INSPECTING PILOT AND BURNER FLAME Continued High Yellow Flame Flame Lifting Off of Burner Figure 17 - Incorrect Burner Flame Patterns If burner flame pattern is incorrect, as shown in Figure 17. • turn heater off (see To Turn Off Gas to Appliance , page 20) • see Troubleshootin[...]

23 100749 W ARNING Turn off heater and let cool before cleaning or servicing. W ARNING Keep heater clear and free from combustible materials, gasoline, and other flammable vapors and liquids. CAUTION You must keep control areas, burner, and circulating air passageways of heater clean. Inspect these areas of heater before each use. Have heater and v[...]

24 100749 TROUBLE- SHOOTING Note: All troubleshooting items are listed in order of operation. 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 system. CAUTION Never us[...]

25 100749 TROUBLE- SHOOTING Continued REMEDY 1. Fully open manual shut-off valve. 2. Press in control knob fully. 3. After pilot lights, keep control knob pressed in 30 seconds. 4 . Wait one minute for safety interlock system to reset. Repeat ignition. 5. Hand tighten until snug, then tighten 1/4 turn more. 6. A) Contact qualified service person to[...]

26 100749 TROUBLE- SHOOTING Continued OBSERVED PROBLEM Burner backfiring during combustion. Yellow flame during burner combustion. Slight smoke or odor during initial opera- tion. Burner fails to respond to thermo- stat. Heater produces a whistling noise when burner is lit. REMEDY 1. Clean burner (see Cleaning and Mainte- nance , page 23) or replac[...]

27 100749 TROUBLE- SHOOTING Continued W ARNING 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 ga[...]

28 100749 SER VICE PROCEDURES 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 system. Removing Control Valve and Burner Tube 1. Shut off gas supply to heater. 2. Remo[...]

29 100749 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 19). 4. Remove orifice holder from burner (see Figure 19). 5. Remove pilot burner bracket nuts and remove pilot assembly (see Figure 19). 6. Move burner to [...]

30 100749 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 20). 4. Remove orifice holder from burner (see Figure 20). 5. Use socket or open-end wrench to remove the old orifice from the orifice holder. 6. Cl[...]

31 100749 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. ACCESSORIES Purchase these heater accessories from your local dealer. If they can not supply these accessories, contact your nearest Parts Central (see [...]

32 100749 Note: Use only original replacement parts. This will protect your warranty cover- age for parts replaced under warranty. Parts Under Warranty Contact Vanguard dealer or call DESA International’s Technical Service Depart- ment at 1-800-323-5190. When calling DESA International, have ready • your name • your address • model number o[...]

33 100749 This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Ordering Replacement Parts on page 32 of this manual. ILLUSTRA TED P ARTS LIST Cabinet Assembly 1 2 5 3 4 5 6 5 7 8 PART NUMBER FOR KEY NO. GVC65NA GVC50NA GVC35NA DESCRIPTION QTY. 1 100202-03 100202-02 100202-01 Lower Front[...]

34 100749 ILLUSTRA TED P ARTS LIST Burner Assembly 11 10 8 19 18 17 16 15 14 12 13 9 7 6 5 4 3 2 1 35 Model Only 6 50 and 65 Models 11 20 21 17 16 4 24 23 26 25 22 27 7[...]

35 100749 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 32 of this manual. PART NUMBER FOR KEY NO. GVC65NA GVC50NA GVC35NA DESCRIPTION QTY. 1 100729-06 100729-05 100729-04 Combustion Chamber 1 2 098324-02 098324-02 09[...]

W ARRANTY INFORMA TION 100749-01 REV. D 12/94 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. LIMITED WARRANTY VANGUARD VENTED NAT[...]