Save this manual for future reference. Vent-free natural gas heater owner’s operation and installation manual ® models: vn6a and vn12 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. — do n...
2 contents section page safety information ......................................................................... 2 product identification .................................................................... 4 local codes ..............................................................................
3 ! Warning icon g 001 warnings continued 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 • do not touch any electrical switch; do not use any phone in your building • immediately call your gas s...
4 product identification control knob figure 1 - vent-free natural gas heater (model vn12 shown) local codes install and use heater with care. Follow all local codes. In the absence of local codes, use the latest edition of national gas code ansi z223.1, also known as nfpa 54*. *available from: amer...
5 installing to wall 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 installing heater, ...
6 2. Mark two mounting screw locations on wall (see figure 3). Installing heater to wall marking screw locations 1. Determine where you will locate heater. Figure 3 - mounting screw locations mounting screw locations 10 7/8" minimum to maintain 8" clearance from wall 7 3/4" 20 1/4" minimum to mainta...
7 5. Tighten two screws until 1/16" space (thickness of penny) is between screwheads and wall (see figure 6). Figure 5 - 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 hardwar...
8 placing heater on mounting screws 1. Locate two keyhole slots on back panel of heater (see figure 7). 2. Place large openings of slots over screwheads. Slide heater down until screws are in small portion of slots. Figure 9 - installing bottom mounting screw figure 7 - location of keyhole slots on ...
9 connecting to gas supply continued ! Warning icon g 001 warning never connect heater to private (non-utility) gas wells. This gas is commonly known as well-head gas. Installation must include a manual shutoff valve, ground joint union, and plugged 1/8" npt tap. Locate npt tap within reach for test...
10 important: hold pressure regulator with wrench when connecting it to gas piping and/or fittings. Figure 10 - 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 manu...
11 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 11). 2. Pressurize supply piping system by eith...
12 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 is hea...
13 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 the safety information at the top of page 12. If you don’t smell gas, go to the next step. 5. Press in control knob. Note: you may be running this heater for the firs...
14 to select heating level 1. Slightly press in control knob and turn counterclockwise c-clockwise to the low or high positions (vn12) or on position (vn6a). Important: release downward pressure while turning control knob. Control knob will lock at the desired position. Figure 15 - burner patterns l...
15 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 8, page 8). 2. Follow steps 1 through 6 under li...
16 burner flame pattern figure 18 shows a correct burner flame pattern. Figure 19 shows an incorrect burner flame pattern. Figure 18 - correct burner flame pattern (model vn12 shown) figure 19 - incorrect burner flame pattern (model vn12 shown) if burner flame pattern is incorrect, as shown in figur...
17 trouble- shooting possible cause 1. Ignitor electrode posi- tioned wrong 2. Ignitor electrode broken 3. Ignitor electrode not con- nected to ignitor cable 4. Ignitor cable pinched or wet 5. Broken ignitor cable 6. Bad piezo ignitor 1. Gas supply turned off or manual shutoff valve closed 2. Contro...
18 remedy 1. Press in control knob fully 2. After ods/pilot lights, keep control knob pressed in 10 seconds 3. Fully open manual shut- off valve 4. Hand tighten until snug, then tighten 1/4 turn more 5. A) contact local natural gas company b) clean ods/pilot (see cleaning and m a i n t e n a n c e ,...
19 possible cause 1. Plaque damaged 2. Inlet gas pressure is too low 3. Control knob set be- tween 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. 2. Gas leak. See w...
20 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 supplier, ...
21 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 l...
22 key part no. Number description qty. 1 098304-01 screw, #10 x 3/8" 2 2 099467-01 front panel assembly 1 3 099318-01 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 098594...
23 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 099318-01 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 098514-01 the...
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...
