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OWNER’S MANUAL
INFRARED VENT-FREE NATURAL GAS HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
FA-3B
FAS-3C
FA-5B
FAS-5C
WARNING: Improper instal-
WARNING: If the information in this manual is
lation, adjustment, alteration,
not followed exactly, a fire or explosion may
service, or maintenance can
result causing property damage, personal
cause injury or property dam-
injury, or loss of life.
age. Refer to this manual for
— Do not store or use gasoline or other
correct installation and op-
flamma
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INFRARED 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. Always run non-thermostat heater with of traffic and away from furniture plaque control knob in a locked position. and draperies. Never set control knob between locked WARNINGS positions. Poor combustion and higher Do not place clothing or other levels of carbon monoxide may result. flammable material on or near IMPORTANT
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OWNER’S MANUAL PRODUCT PRODUCT IDENTIFICATION FEATURES Control Knob SAFETY DEVICE 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. Burners THERMOSTATIC HEAT CONTROL ON THERMOSTAT MODELS
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INFRARED NATURAL GAS HEATER Confined and Unconfined Space PRODUCING ADEQUATE FRESH 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 A
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OWNER’S MANUAL FRESH 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 = ________________
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INFRARED NATURAL GAS HEATER FRESH AIR FOR COMBUSTION AND VENTILATION 12" Continued VENTILATION AIR Ventilation Air From Inside Ventilation Grills Into Adjoining Room, Building Ventilation Option 2 Grills Or This fresh air would come from an adjoining into Adjoining Remove unconfined space. When ventilating to an Room, Door into adjoining unconfined space, you must pro- Option 1 Adjoining vide two permanent openings: one within Room, Option 3 12" of the ceiling and one within 12" of the fl
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OWNER’S MANUAL For convenience and efficiency, install heater INSTALLATION WARNING: Maintain the mini- • where there is easy access for operation, mum clearances shown in Figure inspection, and service 4. If you can, provide greater clear- NOTICE: This heater is intended • in coldest part of room ances from floor, ceiling, and for use as supplemental heat. Use joining wall. this heater along with your pri- An optional fan kit is available from your mary heating system. Do not in- dealer. See Ac
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INFRARED NATURAL GAS HEATER Removing Front Panel Of Heater Marking Screw Locations INSTALLATION Models FA-3B and FA-5B 1. Tape mounting bracket to wall where Continued heater will be located. Make sure 1. Remove two screws near bottom cor- mounting bracket is level. INSTALLING HEATER TO ners of lower front panel. WALL 2. Pull bottom of lower front panel for- WARNING: Maintain minimum ward, then down (see Figure 8). Mounting Bracket clearances shown in Figure 8. If you can, provide greater clear
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OWNER’S MANUAL Installing Bottom Mounting INSTALLATION Screws Continued 1. Locate two bottom mounting holes. Attaching Mounting Bracket To These holes are near bottom on back Wall panel of heater (see Figure 13). 2. Mark screw locations on wall. Note: Wall anchors, mounting screws, and Figure 10 - Folding Anchor spacers are in hardware package. The hard- 3. Remove heater from mounting bracket. ware package is provided with heater. 4. If installing bottom mounting screws into hollow or solid wall
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INFRARED NATURAL GAS HEATER IMPORTANT: Install an equipment shutoff Install sediment trap in supply line as shown INSTALLATION valve in an accessible location. The equip- in Figure 14. Locate sediment trap where it Continued ment shutoff valve is for turning on or is within reach for cleaning. Locate sedi- shutting off the gas to the appliance. ment trap where trapped matter is not likely CONNECTING TO GAS to freeze. A sediment trap traps moisture Apply pipe joint sealant lightly to male SUPPLY
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OWNER’S MANUAL Pressure Testing Heater Gas INSTALLATION OPERATING Connections Continued HEATER 1. Open equipment shutoff valve (see Fig- CHECKING GAS ure 15). NON-THERMOSTAT MODELS CONNECTIONS 2. Open main gas valve located on or near FA-3B AND FA-5B gas meter. FOR YOUR SAFETY WARNING: Test all gas pip- 3. Make sure control knob of heater is in READ BEFORE ing and connections for leaks the OFF position. after installing or servicing. Cor- LIGHTING 4. Check all joints from equipment shutoff rect
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INFRARED NATURAL GAS HEATER Slightly press in control knob and turn coun- OPERATING terclockwise to the LOW, ME- HEATER DIUM, or HIGH positions (see Figure 19). Continued IMPORTANT: Release downward pres- sure while turning control knob. Control LIGHTING knob will lock at the desired position. INSTRUCTIONS Figure 17 - Control Knob In The OFF Position TO TURN OFF GAS 1. STOP! Read the safety information Ignitor Electrode page 11, column 3. TO APPLIANCE Thermocouple 2. Make sure equipment shutoff
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2 2 6 5 1 1 7 7 4 6 6 ON ON ON OWNER’S MANUAL 3. Push in control knob slightly and turn 7. Press in control knob and turn coun- OPERATING clockwise to the OFF position. terclockwise past IGN to PI- HEATER Be sure that the temperature setting LOT (see Figure 20). This will cause knob is set at the line between level 1 the piezo ignitor to spark and light Continued and level 7 (see Figure 20). the pilot gas. Keep control knob de- THERMOSTAT MODELS FAS-3C pressed for 10 seconds before releas- 4.
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INFRARED NATURAL GAS HEATER Pilot Burner ODS/PILOT AND BURNER OPERATING • Use a vacuum cleaner, pressurized air, Thermocouple HEATER or small, soft bristled brush to clean. Continued GOOD PILOT GRH/OV 009 CLEANING BURNER THERMOSTAT CONTROL Figure 23 - Correct Pilot Flame Pattern PILOT AIR INLET HOLE OPERATION We recommend that you clean the unit every Pilot Burner The thermostatic control used on these 2,500 hours of operation or every three months. models differs from standard thermostats. Ther
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OWNER’S MANUAL TROUBLESHOOTING WARNING: Turn off and un- CAUTION: Never use a wire, Note: For additional help, visit DESA plug heater and let cool before needle, or similar object to clean International’s technical service web site servicing. Only a qualified ser- ODS/pilot. This can damage ODS/ at www.desatech.com. vice person should service and pilot unit. repair heater. Note: All troubleshooting items are listed in order of operation. OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignitor but
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INFRARED NATURAL GAS HEATER TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Burner(s) does not light after ODS/pilot is lit 1. Burner orifice(s) is clogged 1. Clean burner orifice(s) (see Cleaning and Maintenance, page 14) or replace burner orifice(s) 2. Burner orifice(s) diameter is too small 2. Replace burner orifice(s) 3. Inlet gas pressure is too low 3. Contact local natural gas company Delayed ignition of burner(s) 1. Manifold pressure is too low 1. Contact local natural ga
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OWNER’S MANUAL 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 remover, cigarette
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INFRARED NATURAL GAS HEATER SPECIFICATIONS FA-3B FAS-3C FA-5B FAS-5C Btu (Variable) 6,000/12,000/18,000 18,000 7,000/18,000/30,000 30,000 Type Gas Natural Only Natural Only Natural Only Natural Only Ignition Piezo Piezo Piezo Piezo Pressure Regulator Setting 6" W.C. 6" W.C. 6" W.C. 6" W.C. Inlet Gas Pressure* (in. of water) Maximum 10.5" 10.5" 10.5" 10.5" Minimum 7" 7" 7" 7" Dimensions, Inches (H x W x D) Heater 23 x 18.75 x 7 23 x 18.75 x 7 23 x 26 x 7 23 x 26 x 7 Carton 26 x 21 x 9 26 x 21 x 9
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OWNER’S MANUAL REPLACEMENT TECHNICAL SERVICE PARTS SERVICE PUBLICATIONS Note: Use only original replacement parts. You may have further questions about in- You can purchase a service manual from the This will protect your warranty coverage for stallation, operation, or troubleshooting. address listed on the back page of this parts replaced under warranty. manual. Send a check for $5.00 payable to If so, contact DESA International’s Techni- DESA International. cal Service Department at 1-800-323-
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INFRARED NATURAL GAS HEATER ILLUSTRATED 28 PARTS BREAKDOWN FA-3B 21 7 1 23 4 24 (See Detail) 22 25 27 3 26 27 2 4 7 20 17 11 7 9 6 20 5 10 5-1 7 5-2 18 20 14 15 19 16 8 Burner Assembly 13 ODS/Pilot Assembly 12 105566 20
