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Vanguard VN12A Owner's Operation And Installation Manual

Manual is about: VENT-FREE NATURAL GAS HEATER

Summary of VN12A

  • Page 1

    Save this manual for future reference. Vent-free natural gas heater owner’s operation and installation 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. — do no...

  • Page 2: Contents

    2 100845 contents section page safety information ......................................................................... 2 product identification .................................................................... 4 local codes .......................................................................

  • Page 3: Safety

    3 100845 safety information continued warning icon g 001 warnings continued warning: any change to this heater or its controls can be dangerous. 1. Use only natural gas. Do not convert heater to use different fuel type. 2. If you smell gas • shut off gas supply • do not try to light any appliance • ...

  • Page 4: Product

    4 100845 product identification 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 yo...

  • Page 5: Fresh Air

    5 100845 fresh air for combustion and ventilation warning icon g 001 warning 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. Today’s ho...

  • Page 6: Fresh Air

    6 100845 fresh air for combustion and ventilation continued warning icon g 001 warning 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 ...

  • Page 7: Fresh Air

    7 100845 fresh air for combustion and ventilation continued ventilation air ventilation air from inside building this fresh air would come from an adjoining unconfined space. When ventilating to an adjoining unconfined space, you must provide two permanent openings: one within 12" of the ceiling and...

  • Page 8: Fresh Air

    8 100845 fresh air for combustion and ventilation 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. Connect these ...

  • Page 9: Installing

    9 100845 installing to wall 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. Installation items before in...

  • Page 10: Warning

    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. Figure 5 - mounting screw locations mounting screw locations 10 7/8" minimum to maintain 8" clearance from wall 7 3/4" 20 1/4" minimum t...

  • Page 11: Installing

    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. The...

  • Page 12: Installing

    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. Slide heater down until screws are in small portion of slots. Figure 11 - installing bottom mounting screw figure 9 - location of keyhole ...

  • Page 13: Connecting

    13 100845 connecting to gas supply 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). Apply pipe joint sealant lightly to male thr...

  • Page 14: Checking

    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. Purchase the optional a.G.A. Design-certifi...

  • Page 15: Checking

    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). 2. Pressurize supply piping system ...

  • Page 16: Operating

    16 100845 operating heater 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. B. Before lighting smell all around the appliance area for gas. Be sure to smell next to the floor because some gas...

  • Page 17: Operating

    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. If you smell gas, stop! Follow “b” in...

  • Page 18: Warning

    18 100845 to select heating 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. Figure 17 - burner pa...

  • Page 19: Operating

    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). 2. Follow steps 1 through 5...

  • Page 20: Cleaning

    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 - incorrect burner flame pattern (model vn12a shown) if burner flame pattern is incorrect, as shown...

  • Page 21: Trouble-

    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. Bad piezo ignitor 1. Gas supply turned off or ma...

  • Page 22: Trouble-

    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. Pilot flame not to...

  • Page 23: Trouble-

    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. See impor- ta...

  • Page 24: Warning

    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. Locate and correct all leaks (see che...

  • Page 25: Service

    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 i...

  • Page 26: Parts List

    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 assembly 1 6 m15823-37 screw hex #8 x 1/4" 9 7 503329 ods/pilot assembly 1 7-1 098514-01 thermocouple 1 7-2...

  • Page 27: Parts List

    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 099469-02 reflector assembly 1 6 m15823-37 screw hex #8 x 1/4" 10 7 503329 ods/pilot assembly 1 7-1 098514...

  • Page 28: Warranty Information

    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 maintain...