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N
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DESA INTERNATIONAL
UNVENTED (VENT-FREE)
PROPANE/LP GAS LOG HEATER
ALSO DESIGN-CERTIFIED AS A VENTED DECORATIVE APPLIANCE
OWNER’S OPERATION AND INSTALLATION MANUAL
"A" Model
18", 24", and 30"
CFS18PRA
Remote-Ready
VS18PRA
VS24PRA
VS30PRA
®
WARNING: Improper installation, adjust-
WARNING: If the information in this manual
ment, alteration, service, or maintenance
is not followed exactly, a fire or explosion
can cause injury or property damage.
may result causing property damage, per-
sonal
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DESA INTERNATIONAL UNVENTED PROPANE/LP GAS LOG HEATER • immediately call your gas supplier these products may create a white pow- SAFETY from a neighbor’s phone. Follow the der residue within burner box or on INFORMATION gas supplier’s instructions adjacent walls or furniture. • if you cannot reach your gas supplier, 13. Do not use a blower insert, heat ex- call the fire department WARNINGS changer insert or other accessory not 4. This heater shall not be installed in a approved for use with th
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HI TEMP MAN LO ON AUTO OFF STATUS OWNER’S MANUAL SAFETY PRODUCT IDENTIFICATION INFORMATION Crossover Log Continued 24. This heater must not be connected to Rear Log Front Branch any external electrical source. 25. Operating heater above elevations of Rear Burner 4,500 feet may cause pilot outage. 26. To prevent performance problems, the Front Burner use of a propane fuel tank of less than 100 lb. capacity is not recommended. Piezo Ignitor UNPACKING WARNING: Do not remove the metal data plates a
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DESA INTERNATIONAL UNVENTED PROPANE/LP GAS LOG HEATER Confined and Unconfined Space PROVIDING ADEQUATE AIR FOR VENTILATION The National Fuel Gas Code (ANS Z223.1, COMBUSTION AND 1992 Section 5.3) defines a confined space The following are excerpts from National VENTILATION as a space whose volume is less than 50 Fuel Gas Code. NFPA 54/ANS Z223.1, Sec- 3 cubic feet per 1,000 Btu per hour (4.8 m per tion 5.3, Air for Combustion and Ventilation. kw) of the aggregate input rating of all All spaces i
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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 work sheet 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.
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DESA INTERNATIONAL UNVENTED PROPANE/LP GAS LOG HEATER AIR FOR 12" COMBUSTION AND Ventilation VENTILATION Ventilation Grills Grills Continued Into Adjoining Room, Into Adjoining Or Option 2 Room, VENTILATION AIR Remove Option 1 Door into Ventilation Air From Inside Adjoining Room, Building Option This fresh air would come from an adjoining 3 unconfined space. When ventilating to an adjoining unconfined space, you must pro- 12" vide two permanent openings: one within 12" of the ceiling and one
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OWNER’S MANUAL INSTALLATION AND INSTALLATION WARNING: Never install the CLEARANCES heater NOTICE: This heater is intended (Vent-Free Operation Only) • in a bedroom or bathroom un- for use as supplemental heat. Use less installed as a vented ap- this heater along with your pri- pliance, see page 10. WARNING: Maintain the mini- mary heating system. Do not in- • in a recreational vehicle mum clearances. If you can, pro- stall this heater as your primary • where curtains, furniture, cloth- vide gre
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DESA INTERNATIONAL UNVENTED PROPANE/LP GAS LOG HEATER If Using Mantel IMPORTANT: If you cannot meet these INSTALLATION minimum clearances, you must operate You must have noncombustible material(s) Continued heater with chimney flue damper open. Go above the fireplace opening. Noncombus- to Installing Damper Clamp Accessory for tible materials (such as slate, marble, tile, NOTICE: Manual control heaters Vented Operation, page 10. etc.) must be at least 1/2 inch thick. With may be used as a vented
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OWNER’S MANUAL Mantel Shelf INSTALLATION 10" Underside of Continued 8" Mantel Shelf 6" MANTEL CLEARANCES 1 2 /2" In addition to meeting noncombustible mate- rial clearances, you must also meet required All minimum clearances between fireplace opening and distances are mantel shelf. If you do not meet clearances in inches listed in Figure 6 you will need a hood. Minimum Non- (A) Combustible Log Set Material Determining Minimum Mantel 12" 18" 20" 22" 24" 24"/30" Models Clearance 8" 14" 16 3/ "
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DESA INTERNATIONAL UNVENTED PROPANE/LP GAS LOG HEATER Damper Clamp INSTALLATION Continued INSTALLING DAMPER CLAMP ACCESSORY FOR Damper Damper VENTED OPERATION Clamp Damper Note: When used as a vented heater, appli- Damper ance must be installed only in a solid-fuel burning fireplace with a working flue and constructed of noncombustible material. If your heater is a manually controlled model, you may use this heater as a vented product. Masonry Fireplace Manufactured Fireplace There are three rea
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OWNER’S MANUAL • sealant (resistant to propane/LP gas) The installer must supply an external regu- INSTALLATION lator. The external regulator will reduce • manual shutoff valve * Continued incoming gas pressure. You must reduce • test gauge connection * incoming gas pressure to between 11 and 14 • sediment trap inches of water. If you do not reduce incom- Gas Control ing gas pressure, heater regulator damage • tee joint could occur. Install external regulator with • pipe wrench the vent pointing
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DESA INTERNATIONAL UNVENTED PROPANE/LP GAS LOG HEATER Pressure Testing gas Supply Pressure Testing Heater Gas INSTALLATION Piping system Connections Continued 1. Open manual shutoff valve (see Fig- Test Pressures In Excess Of 1/2 PSIG Apply pipe joint sealant lightly to male ure 15). 1. Disconnect heater and its individual threads. This will prevent excess sealant 2. Open propane supply tank valve. manual shutoff valve from gas supply from going into pipe. Excess sealant in pipe piping system. P
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4 4 OWNER’S MANUAL Peg Rear Log (#3) INSTALLATION Groove in Front Log (#1) Back of Continued Groove in Log Back of Log Notch INSTALLING LOGS Grate Prong Rear WARNING: Failure to position Burner the parts in accordance with these diagrams or failure to use only Grate parts specifically approved with Prong this heater may result in property Grate damage or personal injury. Prongs Each log is marked with a number. These Metal Grate Bar numbers will help you identify the log when installing. It is
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O N O T DESA INTERNATIONAL UNVENTED PROPANE/LP GAS LOG HEATER 1. STOP! Read the safety information, LIGHTING OPERATING column 1. INSTRUCTIONS HEATER 2. Make sure manual shutoff valve is fully open. FOR YOUR SAFETY WARNING 3. Set selector switch in the OFF position. READ BEFORE • If fireplace has glass doors, never operate this heater with 4. Press in and turn control knob clock- LIGHTING glass doors closed. If you op- wise to the OFF position (see erate heater with doors closed, Figure 21).
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OWNER’S MANUAL TO TURN OFF GAS TO MANUAL LIGHTING OPERATING APPLIANCE PROCEDURE HEATER Shutting Off Heater 1. Follow steps 1 through 6 under Light- Continued ing Instructions, page 14. 1. Turn control knob clockwise 8. Keep control knob pressed in for 30 to the OFF position. 2. Depress control knob and light pilot seconds after lighting pilot. After 30 with match. 2a. Set selector switch in the OFF position. seconds, release control knob. 3. Keep control knob pressed in for 30 • If control kno
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P O F F O DESA INTERNATIONAL UNVENTED PROPANE/LP GAS LOG HEATER minutes in the auto mode. It will not GHRC Operation: OPERATING respond immediately to the tempera- 2a. Press the ON/OFF button to turn the HEATER ture setting being turned up or down. burners on and off. When turning IMPORTANT: The hand-held remote Continued burners off, the pilot will remain lit. control unit must be near the heater. Do not keep the hand-held remote OPTIONAL REMOTE GHRCT Operation: control unit too close to the he
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OWNER’S MANUAL If front burner flame pattern is incorrect, as FRONT BURNER FLAME INSPECTING shown in Figure 28 PATTERN BURNERS • turn heater off (see To Turn Off Gas to Figure 27 shows correct front burner flame Appliance, page 15) Check pilot flame pattern and burner flame pattern. Figure 28 shows incorrect front patterns often. • see Troubleshooting, pages 19 through 21 burner flame pattern. The incorrect burner flame pattern shows yellow tipping at top of PILOT FLAME PATTERN blue flame. Figur
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DESA INTERNATIONAL UNVENTED PROPANE/LP GAS LOG HEATER 4. Check the injector holder located at the CLEANING AND REPLACEMENT end of the burner tube again. Remove MAINTENANCE any large particles of dust, dirt, lint, or PARTS pet hairs with a soft cloth or vacuum Note: Use only original replacement parts. cleaner nozzle. WARNING: Turn off heater This will protect your warranty coverage for 5. Blow air into the primary air holes on and let cool before cleaning. parts replaced under warranty. the inj
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OWNER’S MANUAL TROUBLESHOOTING WARNING: Turn off and un- CAUTION: Never use a wire, plug heater and let cool before needle, or similar object to clean Note: For additional help, visit DESA servicing. Only a qualified ser- ODS/pilot. This can damage ODS/ International’s technical service web site vice person should service and pilot unit. at www.desatech.com. repair heater. Note: All troubleshooting items are listed in order of operation. OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignitor butt
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DESA INTERNATIONAL UNVENTED PROPANE/LP GAS LOG HEATER TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY One or both burners do not light after ODS/ 1. Inlet gas pressure is too low 1. Contact local propane gas company pilot is lit 2. Burner orifice(s) clogged 2. Clean burner(s) (see Cleaning and Main- tenance, page 18) or replace burner orifice(s) 3. Mislocated crossover tube 3. Contact qualified service person 4. Burner orifice(s) diameter is too small 4. Replace burner orifice(s
