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VENT-FREE NATURAL GAS HEATER
OWNER'S OPERATION AND INSTALLATION MANUAL
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 not store or use gasoline or other flammable vapors and liquids in the
vicinity of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• 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, call the fire department.
— Installation and service must be performed by a qualified installer, service
agency, or the gas supplier.
Models: VN6B and VN12A
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Related Manuals for Vanguard VN12A
Summary of Contents for Vanguard VN12A
- Page 1 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 not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
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Page 2: Table Of Contents
Accessory ... 25 Parts List (Model VN6B) ... 26 Illustrated Parts Breakdown (Model VN6B) ... 26 Parts List (Model VN12A) ... 27 Illustrated Parts Breakdown (Model VN12A) ... 27 Warranty Information ... Back Cover WARNING ICON G 001 Read this Owner’s Manual carefully and completely IMPORTANT: before trying to assemble, operate, or service this heater. - Page 3 • immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions • if you cannot reach your gas supplier, call the fire department 3. This heater shall not be installed in a bedroom or bathroom (VN12A - input 12,000 BTUs). 4. Never install the heater •...
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Page 4: Product Identification
Front Panel Figure 1 - Vent-Free Natural Gas Heater (Model VN12A Shown) 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*. -
Page 5: Fresh Air For Combustion And Ventilation
FRESH AIR COMBUSTION VENTILATION 100845 WARNING ICON G 001 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. - Page 6 FRESH AIR COMBUSTION VENTILATION Continued 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. Space: Includes the room in which you will install heater plus any adjoining rooms with doorless passageways or ventilation grills between the rooms.
- Page 7 FRESH AIR COMBUSTION VENTILATION Continued 100845 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 one within 12"...
- Page 8 FRESH AIR COMBUSTION 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 items directly to the outdoors or spaces open to the outdoors.
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Page 9: Installing To Wall
WARNING ICON G 001 Never install the heater • in a bedroom or bathroom (VN12A) • in a recreational vehicle • where curtains, furniture, clothing, or other flammable objects are less than 36 inches from the front, top, or sides of the heater •... - Page 10 INSTALLING TO WALL Continued For convenience and efficiency, install heater • where there is easy access for operation, inspection, and service • in coldest part of room CEILING 8" Minimum From Sides Of Heater Left Side FLOOR Figure 4 - Mounting Clearances As Viewed From Front of Heater INSTALLING HEATER TO WALL Marking Screw Locations 1.
- Page 11 INSTALLING TO WALL Continued 100845 Installing Two Mounting Screws Wall anchors and mounting screws are in hardware package. The hardware Note: package is provided with heater. Attaching to wall stud method For attaching mounting screw to wall stud 1. Drill hole at marked location using 9/64" drill bit. 2.
- Page 12 INSTALLING TO WALL Continued 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 9 - Location Of Keyhole Slots On Back Panel Of Heater Removing Front Panel Of Heater 1.
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Page 13: Connecting To Gas Supply
CONNECTING TO GAS SUPPLY 100845 A qualified service person must connect heater to gas supply. Follow all local codes. WARNING ICON Never connect heater to private (non-utility) gas wells. This gas is commonly known as well-head gas. Check gas line pressure before connecting heater to gas line. Gas line IMPORTANT: pressure must be no greater than 14 inches of water. -
Page 14: Checking Gas Connections
CONNECTING TO GAS SUPPLY Continued CHECKING CONNECTIONS Hold pressure regulator with wrench when connecting it to gas piping IMPORTANT: and/or fittings. 3/8" NPT Pipe Nipple Manual Shutoff Valve * From Gas Meter (4" W.C. to 10.5" W.C. Pressure) 3" Minimum Figure 12 - Gas Connection * An A.G.A. - Page 15 CHECKING CONNECTIONS Continued 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.
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Page 16: Operating Heater
1. STOP! Read the safety information above. 2. Make sure manual shutoff valve is fully open. 3. Turn control knob clockwise IGNITOR Figure 15 - Control Knob In The OFF Position (Model VN12A Shown) WARNING to the OFF position. Clockwise... - Page 17 OPERATING HEATER Continued 100845 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 16. If you don’t smell gas, go to the next step. 5.
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Page 18: Operating Heater
WARNING ICON G 001 When running heater, set control knob at LOW or HIGH locked positions (VN12A) or ON position (VN6B). Never set control knob between locked positions. Poor combustion and higher levels of carbon monoxide may result. WARNING ICON... -
Page 19: Inspecting Burner
OPERATING HEATER Continued INSPECTING BURNER 100845 TO TURN OFF GAS TO APPLIANCE Shutting Off Heater 1. Turn control knob clockwise Shutting Off Burner Only (pilot stays lit) 1. Turn control knob clockwise MANUAL LIGHTING PROCEDURE 1. Remove front panel (see Figure 10, page 12). 2. -
Page 20: Cleaning And Maintenance
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 in Figure 21 •... -
Page 21: Troubleshooting
TROUBLE- SHOOTING Note: All troubleshooting items are listed in order of operation. 100845 WARNING ICON G 001 Turn off heater and let cool before servicing. Only a qualified service person should service and repair heater. WARNING ICON G 001 Never use a wire, needle, or similar object to clean ODS/pilot. This can damage ODS/pilot unit. - Page 22 TROUBLE- SHOOTING Continued OBSERVED POSSIBLE PROBLEM CAUSE ODS/pilot lights but 1. Control knob not fully flame goes out when pressed in control knob is 2. Control knob not released pressed in long enough 3. Manual shutoff valve not fully open 4.
- Page 23 TROUBLE- SHOOTING Continued 100845 POSSIBLE OBSERVED CAUSE PROBLEM 1. Plaque damaged Burner plaque(s) does 2. Inlet gas pressure is not glow too low 3. Control knob set between locked positions 1. Residues from manu- Slight smoke or odor facturing processes during initial opera- tion 1.
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Page 24: Technical Service
(see Checking Gas Connections, page 2. Replace control valve 1. Take apart gas tubing and remove foreign matter 2. Locate and correct all leaks (see Checking Gas Connections, page VN12A VN6B 6,000/12,000 6,000 Natural Only Natural Only Piezo Piezo 3" W.C. -
Page 25: Service Hints
SERVICE HINTS REPLACEMENT PARTS SERVICE PUBLICATIONS ACCESSORY 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 •... -
Page 26: Parts List (Model Vn6B)
PARTS LIST VN6B PART NUMBER DESCRIPTION 098304-01 Screw, #10 x 3/8" 099467-01 Front Panel Assembly 099318-03 Grill Guard 098342-01 Grill Guard Clip 099469-01 Reflector Assembly M15823-37 Screw Hex #8 x 1/4" 503329 ODS/Pilot Assembly 098514-01 Thermocouple 098594-01 Ignitor Electrode 099884-01 Burner Assembly 099056-04 Injector... -
Page 27: Parts List (Model Vn12A)
PARTS LIST VN12A PART NUMBER DESCRIPTION 098304-01 Screw, #10 x 3/8" 099467-01 Front Panel Assembly 099318-03 Grill Guard 098342-01 Grill Guard Clip 099469-02 Reflector Assembly M15823-37 Screw Hex #8 x 1/4" 503329 ODS/Pilot Assembly 098514-01 Thermocouple 098594-01 Ignitor Electrode 099884-02... -
Page 28: Warranty Information
WARRANTY INFORMATION Model Serial No. Date Purchased 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. 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...