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Desa B, C manual

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Table of contents for the manual

  • Page 1

    DESA INTERNA TIONAL UNVENTED (VENT -FREE) NA TURAL GAS LOG HEA TER Variable Manually-Controlled Models Also Design-Certified As Vented Decorative Appliances OWNER’S OPERA TION AND INST ALLA TION MANUAL This appliance may be installed in an aftermarket* manufactured (mobile) home, where not prohib- ited by state or local codes. * Aftermarket: Comp[...]

  • Page 2

    2 104414 DESA INTERNA TIONAL UNVENTED NA TURAL GAS LOG HEA TER WARNING: Any change to this heater or its controls can be dangerous. 1. This appliance is only for use with the type of gas indicated on the rating plate. This appliance is not convertible for use with other gases. SAFETY INFORMA TION DANGER: Carbon monoxide poisoning may lead to death![...]

  • Page 3

    3 104414 OWNER’S MANUAL PRODUCT IDENTIFICA TION Figure 1 - Split Oak Design Model Front Branch Control Knob Rear Log Base Assembly Front Burner Piezo Ignitor Rear Burner Crossover Log Middle Log LOCAL CODES Install and use heater with care. Follow all local codes. In the absence of local codes, use the latest edition of The National Fuel Gas Code[...]

  • Page 4

    4 104414 DESA INTERNA TIONAL UNVENTED NA TURAL GAS LOG HEA TER Confined and Unconfined Space The National Fuel Gas Code (ANS Z223.1, 1992 Section 5.3) defines a confined space as a space whose volume is less than 50 cubic feet per 1,000 Btu per hour (4.8 m 3 per kw) of the aggregate input rating of all appliances installed in that space and an unco[...]

  • Page 5

    5 104414 OWNER’S MANUAL 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 ro[...]

  • Page 6

    6 104414 DESA INTERNA TIONAL UNVENTED NA TURAL GAS LOG HEA TER AIR FOR COMBUSTION AND VENTILA TION Continued 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 pro- vide two permanent openings: one within 12" of the ceili[...]

  • Page 7

    7 104414 OWNER’S MANUAL MINIMUM FIREPLACE CLEARANCE TO COMBUSTIBLE MATERIALS Log Size 18", 24", 30" Side Wall 16" Ceiling 42" Floor 5" Carefully follow the instructions below. This will ensure safe installation into a masonry, UL127-listed manufactured fireplace, or listed vent-free firebox. Minimum Wall and Ceiling [...]

  • Page 8

    8 104414 DESA INTERNA TIONAL UNVENTED NA TURAL GAS LOG HEA TER Noncombustible Requirements for Material Distance (A) Safe Installation 12" or more Noncombustible material OK. Between 8" and 12" 24" or 30" Models: Install fireplace hood accessory (GA6050, GA6052, or GA6053, see Accessories , page 28). 18" Model: Noncomb[...]

  • Page 9

    9 104414 OWNER’S MANUAL 14" Min. Combustible Material Non-Combustible Material Figure 8 - Minimum Fireplace Clearances If Installed at Floor Level Hearth 5" Min. Combustible Material Figure 9 - Minimum Fireplace Clearances Above Combustible Flooring FLOOR CLEARANCES A. If installing appliance on the floor level, you must maintain the mi[...]

  • Page 10

    10 104414 DESA INTERNA TIONAL UNVENTED NA TURAL GAS LOG HEA TER INST ALLA TION Continued INSTALLING HEATER BASE ASSEMBLY WARNING: You must secure this heater to fireplace floor. If not, heater will move when you adjust controls. Moving heater may cause a gas leak. WARNING: If installing in a sunken fireplace, special care is needed. You must raise [...]

  • Page 11

    11 104414 OWNER’S MANUAL Heater Gas Regulator Flexible Gas Hose (if allowed by local codes) Figure 11 - Attaching Flexible Gas Hose to Heater Gas Regulator Figure 12 - Attaching Heater to Fireplace Floor Continued Masonry Screw Mounting Bracket Screw Mounting Bracket Nut Mounting Bracket INST ALLA TION Continued Tee Joint Pipe Nipple Cap 3" [...]

  • Page 12

    12 104414 DESA INTERNA TIONAL UNVENTED NA TURAL GAS LOG HEA TER WARNING: Never use an open flame to check for a leak. Apply a mixture of liquid soap and water to all joints. Bubbles forming show a leak. Correct all leaks at once. WARNING: Test all gas pip- ing and connections for leaks after installing or servicing. Cor- rect all leaks at once. CHE[...]

  • Page 13

    13 104414 OWNER’S MANUAL INST ALLA TION Continued WARNING: Failure to posi- tion the parts in accordance with these diagrams or failure to use only parts specifically approved with this heater may result in prop- erty damage or personal injury. INSTALLING LOGS Each log is marked with a number. These numbers will help you identify the log when ins[...]

  • Page 14

    14 104414 DESA INTERNA TIONAL UNVENTED NA TURAL GAS LOG HEA TER Thermocouple Figure 21 - Pilot Ignitor Electrode Pilot Burner 1. STOP! Read the safety inf ormation above. 2. Make sur e manual shutoff valve is fully open. 3. T urn control knob clockwise Clockwise to the OFF position. Figure 20 - Control Knob and Ignitor Button Location Control Knob [...]

  • Page 15

    15 104414 OWNER’S MANUAL TO TURN OFF GAS TO APPLIANCE 1. Follow steps 1 thr ough 5 under Light- ing Instructions , page 14. 2. Depress contr ol knob and light pilot with match. 3. Keep contr ol knob pressed in f or 30 seconds after lighting pilot. After 30 seconds, release contr ol knob. No w follo w step 8, page 14. CAUTION: Do not try to adjust[...]

  • Page 16

    16 104414 DESA INTERNA TIONAL UNVENTED NA TURAL GAS LOG HEA TER TO TURN OFF GAS TO APPLIANCE WARNING: Do not operate heater between locked positions. CAUTION: Do not try to ad- just heating levels by using the manual shutoff valve. Figure 23 - Pilot The variable control valve can be set to any heat setting and flame height desired, by simply turnin[...]

  • Page 17

    17 104414 OWNER’S MANUAL FRONT BURNER FLAME PATTERN Figure 26 shows correct front burner flame pattern. Figure 27 shows incorrect front burner flame pattern. The incorrect burner flame pattern shows yellow tipping at top of blue flame. Figure 27 - Incorrect Front Burner Flame Pattern Figure 26 - Correct Front Burner Flame Pattern Yellow Tipping A[...]

  • Page 18

    18 104414 DESA INTERNA TIONAL UNVENTED NA TURAL GAS LOG HEA TER CLEANING AND MAINTENANCE WARNING: Turn off heater and let cool before cleaning. CAUTION: You must keep control areas, burners, and cir- culating air passageways of heater clean. Inspect these areas of heater before each use. Have heater inspected yearly by a quali- fied service person.[...]

  • Page 19

    19 104414 OWNER’S MANUAL TROUBLESHOOTING Note: All troubleshooting items are listed in order of operation. WARNING: Turn off and un- plug heater and let cool before servicing. Only a qualified ser- vice person should service and repair heater. CAUTION: Never use a wire, needle, or similar object to clean ODS/pilot. This can damage ODS/ pilot unit[...]

  • Page 20

    20 104414 DESA INTERNA TIONAL UNVENTED NA TURAL GAS LOG HEA TER OBSERVED PROBLEM One or both burners do not light after ODS/ pilot is lit Delayed ignition of one or both burners Burner backfiring during combustion Yellow flame in front burner during burner combustion Slight smoke or odor during initial operation Heater produces a whistling noise wh[...]

  • Page 21

    21 104414 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 re[...]

  • Page 22

    22 104414 DESA INTERNA TIONAL UNVENTED NA TURAL GAS LOG HEA TER OPTIONAL POSITIONING OF THERMOST A T SENSING BULB FOR MASONRY AND FACTORY-BUILT METAL FIREPLACE If your log set cycles to pilot, but the room temperature drops to a lower than ideal comfort level before the log set comes back on, you may want to reposition the thermo- stat sensing bulb[...]

  • Page 23

    23 104414 OWNER’S MANUAL Note: Use only original replacement parts. This will protect your warranty coverage for parts replaced under warranty. PARTS UNDER WARRANTY Contact authorized dealers of this product. If they can’t supply original replacement part(s), call DESA International’s Techni- cal Service Department at 1-800-323-5190. When cal[...]

  • Page 24

    24 104414 DESA INTERNA TIONAL UNVENTED NA TURAL GAS LOG HEA TER ILLUSTRA TED PA R T S BREAKDOWN VARIABLE MANUALLY- CONTROLLED SPLIT OAK MODELS VS18NVC CFS18NVC VS24NVC CFS24NVC VS30NVC CFS30NVC 17 19 18 25 24 20 20 26 27 5 6 7 28 28 24 9 8 10 11 12 14 21 22 26-1 26-2 23 6-1 6-2 13 15 16 4 3 2 1[...]

  • Page 25

    25 104414 OWNER’S MANUAL P AR TS LIST VARIABLE MANUALLY- CONTROLLED SPLIT OAK MODELS This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 23 of this manual. KEY PART NUMBER FOR NO. VS18NVC/CFS18NVC VS24NVC/CFS24NVC VS30NVC/CFS30NVC DESCRIPTION QTY. 1 104388-0[...]

  • Page 26

    26 104414 DESA INTERNA TIONAL UNVENTED NA TURAL GAS LOG HEA TER ILLUSTRA TED PA R T S BREAKDOWN THERMOSTAT- CONTROLLED SPLIT OAK MODELS VS18NTB VS24NTB VS30NTB 30 5 24 5 6 7 8 9 10 7 7 28 12 11 12 13 14 15 17 16 18 23 25 26 6-1 6-2 28 21 22 20 27 19 29 9-1 9-2 4 3 2 1[...]

  • Page 27

    27 104414 OWNER’S MANUAL P AR TS LIST THERMOSTAT- CONTROLLED SPLIT OAK MODELS This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 23 of this manual. KEY PART NUMBER FOR NO. VS18NTB VS24NTB VS30NTB DESCRIPTION QTY. 1 104388-01 104388-02 104388-03 Front Log (#[...]

  • Page 28

    28 104414 DESA INTERNA TIONAL UNVENTED NA TURAL GAS LOG HEA TER FB32C (CIRCULATING), FB32NC (NON-CIRCULATING) SERIES (Not Shown) For 18" and 24" models. FB36CA, FB42C SERIES (CIRCULATING), FB36NCA, FB42NC SERIES (NON-CIRCULATING) (Not Shown) For all 18", 24", and 30" models. DAMPER CLAMP - GA6080 (Not Shown) For manually-co[...]

  • Page 29

    29 104414 OWNER’S MANUAL NOTES _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _____________________________[...]

  • Page 30

    LIMITED WARRANTY VENT-FREE NATURAL GAS LOG HEATERS DESA International warrants this product to be free from defects in materials and components for four (4) years and five (5) years on stainless steel burners from the date of first purchase, provided that the product has been properly installed, operated and maintained in accordance with all applic[...]