Instruction/ maintenance manual of the product VN12A Vanguard
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Save this manual for future reference. VENT -FREE NA TURAL GAS HEA TER OWNER’S OPERA TION AND INST ALLA TION MANUAL ® Models: VN6B and VN12A 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.
2 100845 CONTENTS SECTION PAGE Safety Information ......................................................................... 2 Product Identification .................................................................... 4 Local Codes ...................
3 100845 SAFETY INFORMA TION Continued WARNING ICON G 001 W ARNINGS Continued WARNING: Any change to this heater or its controls can be dangerous. 1. Use only natural gas.
4 100845 PRODUCT IDENTIFICA TION 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.
5 100845 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 could result. Read the following instructions to insure proper fresh air for this and other fuel-burning appliances in your home.
6 100845 FRESH AIR FOR COMBUSTION AND VENTILA TION Continued WARNING ICON G 001 W ARNING You must provide additional ventilation air in a confined space. 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.
7 100845 FRESH AIR FOR COMBUSTION AND VENTILA TION Continued VENTILATION AIR Ventilation Air From Inside Building This fresh air would come from an adjoining unconfined space.
8 100845 FRESH AIR FOR COMBUSTION AND VENTILA TION Continued VENTILATION AIR (Continued) Ventilation Air From Outdoors Provide extra fresh air by using ventilation grills or ducts. You must provide two perma- nent openings: one within 12" of the ceiling and one within 12" of the floor.
9 100845 INST ALLING T O W ALL Continued 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, do not install heater. Call dealer where you bought heater for proper type heater.
10 100845 2. Mark two mounting screw locations on wall (see Figure 5). INSTALLING HEATER TO WALL Marking Screw Locations 1. Determine where you will locate heater.
11 100845 5. Tighten two screws until 1/16" space (thickness of penny) is between screwheads and wall (see Figure 8). Figure 7 - Popping Open Anchor Wings For Thin Walls Thin Walls (1/4" to 1/2" thick) Installing Two Mounting Screws Note: Wall anchors and mounting screws are in hardware package.
12 100845 Placing Heater On Mounting Screws 1. Locate two keyhole slots on back panel of heater (see Figure 9). 2. Place large openings of slots over screwheads.
13 100845 CONNECTING T O GAS SUPPL Y Continued Installation must include a manual shutoff valve, ground joint union, and plugged 1/8" NPT tap. Locate NPT tap within reach for test gauge hook up. NPT tap must be upstream from heater (see Figure 12, page 14).
14 100845 IMPORTANT: Hold pressure regulator with wrench when connecting it to gas piping and/or fittings. Figure 12 - Gas Connection * An A.G.A. design-certified manual shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection.
15 100845 4. Check all joints of gas supply piping system. Apply mixture of liquid soap and water to gas joints. Bubbles forming show a leak. 5. Correct all leaks at once. Test Pressures Equal To or Less Than 1/2 PSIG 1. Close manual shutoff valve (see Figure 13).
16 100845 OPERA TING HEA TER FOR YOUR SAFETY READ BEFORE LIGHTING A. This appliance has a pilot which must be lighted by hand. When lighting the pilot, follow these instructions exactly.
17 100845 7. Keep control knob pressed in for 10 seconds after lighting pilot. After 10 seconds, release control knob. Note: If pilot goes out, repeat steps 3 through 7. 4. Wait five (5) minutes to clear out any gas. Then smell for gas, including near the floor.
18 100845 TO SELECT HEA TING LEVEL 1. Slightly press in control knob and turn counterclockwise C-clockwise to the LOW or HIGH positions (VN12A) or ON position (VN6B). IMPORTANT: Release downward pressure while turning control knob. Control knob will lock at the desired position.
19 100845 Shutting Off Heater 1. Turn control knob clockwise Clockwise to the OFF position. Shutting Off Burner Only (pilot stays lit) 1. Turn control knob clockwise Clockwise to the PILOT position. MANUAL LIGHTING PROCEDURE 1. Remove front panel (see Figure 10, page 12).
20 100845 BURNER FLAME PATTERN Figure 20 shows a correct burner flame pattern. Figure 21 shows an incorrect burner flame pattern. Figure 20 - Correct Burner Flame Pattern (Model VN12A Shown) Figure 21.
21 100845 TROUBLE- SHOOTING POSSIBLE CAUSE 1. Ignitor electrode posi- tioned wrong 2. Ignitor electrode broken 3. Ignitor electrode not connected to ignitor cable 4. Ignitor cable pinched or wet 5. Piezo ignitor nut is loose 6. Broken ignitor cable 7.
22 100845 OBSERVED PROBLEM ODS/pilot lights but flame goes out when control knob is released POSSIBLE CAUSE 1. Control knob not fully pressed in 2. Control knob not pressed in long enough 3. Manual shutoff valve not fully open 4. Thermocouple connec- tion loose at control valve 5.
23 100845 POSSIBLE CAUSE 1. Plaque damaged 2. Inlet gas pressure is too low 3. Control knob set between locked positions 1. Residues from manu- facturing processes 1. Metal expanding while heating or contracting while cooling 1. Heater burning vapors from paint, hair spray, glues, etc.
24 100845 OBSERVED PROBLEM Gas odor even when control knob is in OFF position Gas odor during combustion REMEDY 1. Locate and correct all leaks (see Checking Gas Connections , page 14) 2. Replace control valve 1. Take apart gas tubing and remove foreign matter 2.
25 100845 When gas pressure is too low • pilot will not stay lit • burner(s) will have delayed ignition • heater will not produce specified heat When gas quality is bad • pilot will not stay lit • burner(s) will produce flames and soot • heater will backfire when lit You may feel your gas pressure is too low or gas quality is bad.
26 100845 KEY PART NO. NUMBER DESCRIPTION QTY. 1 098304-01 Screw, #10 x 3/8" 2 2 099467-01 Front Panel Assembly 1 3 099318-03 Grill Guard 1 4 098342-01 Grill Guard Clip 2 5 099469-01 Reflector As.
27 100845 HEATER EXPLODED VIEW KEY PART NO. NUMBER DESCRIPTION QTY. 1 098304-01 Screw, #10 x 3/8" 2 2 099467-01 Front Panel Assembly 1 3 099318-03 Grill Guard 1 4 098342-01 Grill Guard Clip 2 5 0.
LIMITED WARRANTY VANGUARD VENT-FREE RESIDENTIAL GAS HEATERS DESA International warrants this product and any parts thereof, to be free from defects in material and workmanship for two years from the date of first purchase, provided that the product has been properly installed, operated, and maintained in accordance with all applicable instructions.
An important point after buying a device Vanguard VN12A (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Vanguard VN12A yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Vanguard VN12A - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Vanguard VN12A you will learn all the available features of the product, as well as information on its operation. The information that you get Vanguard VN12A will certainly help you make a decision on the purchase.
If you already are a holder of Vanguard VN12A, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Vanguard VN12A.
However, one of the most important roles played by the user manual is to help in solving problems with Vanguard VN12A. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Vanguard VN12A along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
