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®
BLUE FLAME
VENT-FREE NATURAL GAS HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
VN2000BTD
VN2800BTD
20,000 and 30,000 Btu/Hr
Thermostatically-
Controlled Models
WARNING: Improper installa-
WARNING: If the information in this manual
tion, adjustment, alteration, ser-
is not followed exactly, a fire or explosion
vice, or maintenance can cause
may result causing property damage, per-
injury or property damage. Re-
sonal injury, or loss of life.
fer to this manual for correct
installation and op
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® BLUE FLAME NATURAL GAS HEATER 3. This heater shall not be installed in a SAFETY Due to high temperatures, the bedroom or bathroom. appliance should be located out INFORMATION 4. This heater needs fresh, outside air ven- of traffic and away from furniture tilation to run properly. This heater has and draperies. an Oxygen Depletion Sensing (ODS) WARNINGS safety shutoff system. The ODS shuts Do not place clothing or other down the heater if not enough fresh air IMPORTANT: Read this owner’s flamm
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OWNER’S MANUAL PRODUCT PRODUCT IDENTIFICATION FEATURES Ignitor Button SAFETY DEVICE Control Knob This heater has a pilot with an Oxygen Depletion Sensing (ODS) safety shutoff system. The ODS/pilot is a required feature for vent-free room heaters. The ODS/pilot shuts off the heater if there is not enough fresh air. PIEZO IGNITION SYSTEM Grill This heater has a piezo ignitor. This system Guard requires no matches, batteries, or other sources to light heater. Glass THERMOSTATIC HEAT Panel CONTROL F
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® BLUE FLAME NATURAL GAS HEATER Confined and Unconfined Space PROVIDING ADEQUATE AIR FOR VENTILATION The National Fuel Gas Code ANS Z223.1 COMBUSTION AND defines a confined space as a space whose The following are excerpts from National VENTILATION volume is less than 50 cubic feet per 1,000 Fuel Gas Code. NFPA 54/ANS Z223.1, Sec- 3 Btu per hour (4.8 m per kw) of the aggre- tion 5.3, Air for Combustion and Ventilation. gate input rating of all appliances installed WARNING: This heater shall All
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OWNER’S MANUAL AIR FOR COMBUSTION AND 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. 1. Determine the volume of the space (length x width x height). Length x Width x Height = _________________cu. f
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® BLUE FLAME NATURAL GAS HEATER AIR FOR COMBUSTION AND 12" VENTILATION Continued VENTILATION AIR Ventilation Grills Into Adjoining Room, Ventilation Option 2 Ventilation Air From Inside Grills Or Building into Adjoining Remove Room, Door into This fresh air would come from an adjoining Option 1 Adjoining unconfined space. When ventilating to an Room, Option 3 adjoining unconfined space, you must pro- vide two permanent openings: one within 12" of the ceiling and one within 12" of the floo
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OWNER’S MANUAL IMPORTANT: Vent-free heaters add mois- LOCATING HEATER INSTALLATION ture to the air. Although this is beneficial, This heater is designed to be mounted on a wall. installing heater in rooms without enough NOTICE: This heater is intended ventilation air may cause mildew to form for use as supplemental heat. Use WARNING: Maintain the mini- from too much moisture. See Air for Com- this heater along with your pri- mum clearances shown in Figure bustion and Ventilation, pages 4 through
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® BLUE FLAME NATURAL GAS HEATER Removing Front Panel Of Heater Marking Screw Locations INSTALLATION 1. Remove two screws near bottom cor- 1. Tape mounting bracket to wall where Continued ners of front panel. heater will be located. Make sure mounting bracket is level. Attaching Thermostat Sensing 2. Lift straight up on grill guard until it stops. Grill guard will slide up about 1/4". Bulb WARNING: Maintain minimum 1. Remove thermostat sensing bulb from 3. Pull bottom of front panel forward, the
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OWNER’S MANUAL Attaching To Wall Anchor Method Installing Bottom Mounting INSTALLATION Screws For attaching mounting bracket to hollow Continued walls (wall areas between studs) or solid 1. Locate two bottom mounting holes. walls (concrete or masonry) These holes are near bottom on back Attaching Mounting Bracket To panel of heater (see Figure 12). 1. Drill holes at marked locations using Wall 5/16" drill bit. For solid walls (concrete 2. Mark screw locations on wall. Note: Wall anchors, mountin
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® BLUE FLAME NATURAL GAS HEATER Typical Inlet Pipe Diameters INSTALLATION CAUTION: Use pipe joint seal- VN2000BTD 3/8" or greater Continued ant that is resistant to natural gas. VN2800BTD 1/2" or greater CONNECTING TO GAS Install sediment trap in supply line as shown Installation must include equipment shutoff SUPPLY in Figure 13. Locate sediment trap where it valve, union, and plugged 1/8" NPT tap. is within reach for cleaning. Locate sedi- Locate NPT tap within reach for test gauge ment trap
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OWNER’S MANUAL 3. Check all joints from gas meter to equip- INSTALLATION OPERATING ment shutoff valve (see Figure 15). Ap- Continued ply mixture of liquid soap and water to HEATER gas joints. Bubbles forming show a leak. CHECKING GAS 4. Correct all leaks at once. FOR YOUR SAFETY CONNECTIONS READ BEFORE Pressure Testing Heater Gas LIGHTING Connections WARNING: Test all gas pip- ing and connections for leaks 1. Open equipment shutoff valve (see Fig- WARNING: If you do not fol- after installation
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OFF HI ® BLUE FLAME NATURAL GAS HEATER Note: If pilot does not stay lit, refer THERMOSTAT OPERATING to Troubleshooting, pages 14 through CONTROL HEATER 16. Also contact a qualified service OPERATION person or gas supplier for repairs. Continued Until repairs are made, light pilot with The thermostatic control used on these match. To light pilot with match, see LIGHTING models differs from standard thermo- Manual Lighting Procedure. stats. Standard thermostats simply turn INSTRUCTIONS 7. Keep con
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OWNER’S MANUAL CLEANING BURNER INSPECTING WARNING: If yellow tipping PILOT AIR INLET HOLE occurs, your heater could pro- BURNER duce increased levels of carbon We recommend that you clean the unit ev- Check pilot flame pattern and burner flame monoxide. If burner flame pattern ery 2,500 hours of operation or every three pattern often. months. shows yellow tipping, follow in- structions at bottom of this page. We also recommend that you keep the burner PILOT FLAME PATTERN tube and pilot assembly
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® BLUE FLAME NATURAL GAS HEATER TROUBLESHOOTING CAUTION: Never use a wire, WARNING: Turn off and un- needle, or similar object to clean plug heater and let cool before Note: For additional help, visit DESA ODS/pilot. This can damage ODS/ servicing. Only a qualified ser- International’s technical service web site pilot unit. vice person should service and at www.desatech.com. repair heater. Note: All troubleshooting items are listed in order of operation. OBSERVED PROBLEM POSSIBLE CAUSE REMEDY
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OWNER’S MANUAL TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Burner does not light after ODS/pilot is lit 1. Burner orifice is clogged 1. Clean burner (see Cleaning and Mainte- nance, page 13) or replace burner orifice 2. Burner orifice diameter is too small 2. Replace burner orifice 3. Inlet gas pressure is too low 3. Contact local natural gas company Delayed ignition of burner 1. Manifold pressure is too low 1. Contact local natural gas company 2. Burner orifice is clogged
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® BLUE FLAME NATURAL GAS HEATER TROUBLESHOOTING Continued WARNING: 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, call the fire department. IMPORTANT: Operating heater where impurities in air exist may create odors. Cleaning supplies, paint, paint r
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OWNER’S MANUAL SPECIFICATIONS REPLACEMENT PARTS VN2000BTD VN2800BTD Note: Use only original replacement parts. Btu (Variable) 10,000/20,000 15,000/30,000 This will protect your warranty coverage for Type Gas Natural Only Natural Only parts replaced under warranty. Ignition Piezo Piezo Pressure Regulator Setting 3" W.C. 3" W.C. PARTS UNDER WARRANTY Inlet Gas Pressure (in. of water) Contact authorized dealers of this product. Maximum 10.5" 10.5" If they can’t supply original replacement Minimum 5"
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® BLUE FLAME NATURAL GAS HEATER ILLUSTRATED 22 PARTS 23 BREAKDOWN 21 16 VN2000BTD VN2800BTD 10 7 13 12 24 14 4 10 20 15 18 11 19 9 6 3 5 17 8 2 12-1 1 12-2 ODS/Pilot Assembly 104402 18
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OWNER’S MANUAL This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed PARTS LIST under Replacement Parts on page 17 of this manual. KEY PART NUMBER FOR NO. VN2000BTD VN2800BTD DESCRIPTION QTY. 1 098304-01 098304-01 Screw, #10 x 3/8" 2 2 098742-13 098742-14 Front Panel 1 3 103476-01 103476-02 Grill Guard 1 4 101108-01 101108-01 Removable Speed Clip 2 5 104189-01 104189-02 Bottom Glass Retainer 1 6 098260-09 098260-10 Glass Panel 1 7 NJF-8C NJ
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WARRANTY INFORMATION KEEP THIS WARRANTY 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. LIMITED WARRANTY VENT-FREE RESIDENTIAL GAS HEATERS DESA International warrants this product to be free from defects in materials and components for four (4) yea
