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Desa VF-18N-MHd manual

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Table of contents for the manual

  • Page 1

    For more information, visit www .desatech.com W ARNING: If the information in this manual is not fol-           ?[...]

  • Page 2

    www .desatech.com 1 16986-01B 2       -     [...]

  • Page 3

    www .desatech.com 1 16986-01B 3 W ARNING: Do not allow fans                ?[...]

  • Page 4

    www .desatech.com 1 16986-01B 4 1. This ap plia nce is only for us e wi th t he type of ga s indi ca te d on the rat in g plat e. This ap pli ance is n ot conv erti ble for use wit h ot her gas es. 2. Do not place propane/LP supply tank(s) in - side any structure. Locate propane/LP supply tank(s) outdoors (propane/LP units only). 3. If you smell ga[...]

  • Page 5

    www .desatech.com 1 16986-01B 5 LOCAL CODES Install and use heater with care. Follow all local codes. In the absence of local codes, use the lat - est edition of The National Fuel Gas Code ANSI Z223.1/NFP A 54 *. *A vailable from: American National Standards Institute, Inc. 1430 Broadway New Y ork, NY 10018 National Fire Protection Association, Inc[...]

  • Page 6

    www .desatech.com 1 16986-01B 6       construction where:      -  ?[...]

  • Page 7

    www .desatech.com 1 16986-01B 7 AIR FOR COMB USTION AND VENTILA TION Continued If the actual Btu/Hr used is les s than th e maxim um Bt u/ Hr th e spa ce ca n sup port , the space is an uncon - ned space. Y ou will need no additional fresh air ventilation. W ARNING: If the area in    ?[...]

  • Page 8

    www .desatech.com 1 16986-01B 8 INST ALLA TION NOTICE: This heater is intended            ?[...]

  • Page 9

    www .desatech.com 1 16986-01B 9 INST ALLA TION AND CLEARANCES    W ARNING: Maintain the                     ?[...]

  • Page 10

    www .desatech.com 1 16986-01B 10 Figure 6 - Minimum Mantel Clearances Without Using Hood Minimum Noncombustible Material Minimum Noncombustible Material Height Distances to Underside of Mantel T op of Fireplace Opening Underside of Mantel Shelf Mantel Shelf 12" ( A ) 18" 20" 22" 24" All minimum distances are in inches 2 1 /[...]

  • Page 11

    www .desatech.com 1 16986-01B 1 1 MANTEL CLEARANCES In addition to meeting noncombustible material clea ranc es, you must also meet requir ed cleara nces between replace openings and mantel shelf on each side of the replace. If you do not meet the clearances listed below , you will need a hood. [...]

  • Page 12

    www .desatech.com 1 16986-01B 12                ?[...]

  • Page 13

    www .desatech.com 1 16986-01B 13 W e recommend that you install a sediment trap in supp ly line as shown in Fig ure 12. Locate sed imen t trap where it is within reach for cleaning. Install in piping system between fuel supply and heater . Locate sediment trap where trapped matter is not likel y to freeze. A sedime nt trap traps moisture and contam[...]

  • Page 14

    www .desatech.com 1 16986-01B 14 INST ALLA TION Continued 4. Check all joints from equipment shutoff valve to control valve (see Figure 14 or 15). Apply noncorrosive leak detection uid to all joints. Bubbles forming show a leak. 5. Correct all leaks at once. 6. Light heater (see Operating Heater , page 15). Check all other internal joints for le[...]

  • Page 15

    www .desatech.com 1 16986-01B 15 OPERA TING HEA TER FOR YOUR SAFETY  W ARNING: If you do not fol- low these instructions exactly ,         ?[...]

  • Page 16

    www .desatech.com 1 16986-01B 16 6. Pr ess the butt ons and at the same time . A short acoust ic signal con rms the star t s eque nce has beg un. F ur th er sh ort aco us ti c sig na ls (0. 2 sec ., 1 Hz ) in di ca te th e ig niti on pr oce ss un ti l it is com - pl et ed and mai n ga s o ws. I f p ilo t is a lr ead y li t, moto r wil l tu rn[...]

  • Page 17

    www .desatech.com 1 16986-01B 17 OPERA TING HEA TER Continued • Timer: The timer mode ( TIMER ) operates much like the temperature mode above. The timer setting allows you to set specic times for on and off. (There are 2 burner on and 2 burner off cycles every 24 hours.) If the reading for the nighttime temp. is "– – –", the mo[...]

  • Page 18

    www .desatech.com 1 16986-01B 18               1. Disconnect ignitor cable from receiver and connect to Piezo Ignitor T ab (see Figure 18, page 17 and W iring Diagram on page 24). 2. ST OP! R ead saf et y in fo rmat ion o n pa ge 15, 3. Make sure equipment shutoff valv[...]

  • Page 19

    www .desatech.com 1 16986-01B 19    Figure 22 shows correct burner ame pattern.           ?[...]

  • Page 20

    www .desatech.com 1 16986-01B 20 1. Remove two screws from back of unit that attach main log assembly to base assembly (see Figure 24). 2 . Remove screws from left and right side of front log assembly to remove from base as - sembly (see Figure 24). 3. Inspect burner and primary air inlet holes on injector holder of each burner for dust and dirt (s[...]

  • Page 21

    www .desatech.com 1 16986-01B 21 TROUBLESHOO TING     ?[...]

  • Page 22

    www .desatech.com 1 16986-01B 22 TROUBLESHOO TING Continued  Burner backring during com - bustion Orange ame in burner during burner combustion Slight smoke or odor during initial operation (rst hour) Hea ter pr odu ces a w hist lin g noise when burner is lit White powder residue forming with[...]

  • Page 23

    www .desatech.com 1 16986-01B 23 TROUBLESHOO TING Continued         [...]

  • Page 24

    www .desatech.com 1 16986-01B 24 WIRING DIAGRAM SP ARK SP ARK Pilot 4 AA Batteries ON/OFF Switch Thermocurrent Interrupter Block SW SW TC TC Battery Compartment MA GR MO SW P ANEL Receiver Antenna Ignition Cable Thermocouple Thermocurrent Interrupter Block Combination Control ON/OFF Switch (Optional) OFF ON 8 Wire Connecting Cable Thermocurrent Cab[...]

  • Page 25

    www .desatech.com 1 16986-01B 25     Fo r all mod el s. Equipmen t shutof f valve with 1/8" NPT tap. Fits 1/2" NPT pipe. SERVICE HINTS   • pilot will not stay lit ?[...]

  • Page 26

    www .desatech.com 1 16986-01B 26 ILL USTRA TED P ARTS BREAKDOWN   1 2 3 4 5 25 22 7 8 18 9 6 10 1 1 26 34 23 12 21 20 29 28 29 28 27 24 27 24 22 13 19 14 32 30 15 15 15 15 15 15 31 1[...]

  • Page 27

    www .desatech.com 1 16986-01B 27 P ARTS LIST This list contains replaceable parts used in your heater . When ordering parts, follow the instructions listed under Replacement Parts on page 25 of this manual. kEY        [...]

  • Page 28

    2701 Industrial Drive P .O. Box 90004 Bowling Green, KY 42102-9004 www .desatech.com NOT A UPC WARRANTY INFORMA TION KEEP THIS WARRANTY Model Serial No. Date Purchased Always specify model and serial numbers when communicating with the factory . W e reserve the right to amend these specications at any time without notice. The only warranty appli[...]