Instruction/ maintenance manual of the product VF-24N-MHD, VF-24P-MHD, VF-18N-MHD, VF-18P-MHD, VF-18P-MHD Desa
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For more information, visit www .desatech.com W ARNING: If the information in this manual is not fol- .
www .desatech.com 1 16986-01B 2 - .
www .desatech.com 1 16986-01B 3 W ARNING: Do not allow fans .
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.
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.
www .desatech.com 1 16986-01B 6 construction where: .
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.
www .desatech.com 1 16986-01B 8 INST ALLA TION NOTICE: This heater is intended .
www .desatech.com 1 16986-01B 9 INST ALLA TION AND CLEARANCES W ARNING: Maintain the .
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.
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.
www .desatech.com 1 16986-01B 12 .
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.
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.
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 , .
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.
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 specic times for on and off. (There are 2 burner on and 2 burner off cycles every 24 hours.
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).
www .desatech.com 1 16986-01B 19 Figure 22 shows correct burner ame pattern. .
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.
www .desatech.com 1 16986-01B 21 TROUBLESHOO TING .
www .desatech.com 1 16986-01B 22 TROUBLESHOO TING Continued Burner backring during com - bustion Orange ame in burner during burner combustion Sl.
www .desatech.com 1 16986-01B 23 TROUBLESHOO TING Continued .
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 Ign.
www .desatech.com 1 16986-01B 25 Fo r all mod el s. Equipmen t shutof f valve with 1/8" NPT tap.
www .desatech.com 1 16986-01B 26 ILL USTRA TED P ARTS BREAKDOWN .
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.
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 specications at any time without notice.
An important point after buying a device Desa VF-24N-MHD, VF-24P-MHD, VF-18N-MHD, VF-18P-MHD, VF-18P-MHD (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Desa VF-24N-MHD, VF-24P-MHD, VF-18N-MHD, VF-18P-MHD, VF-18P-MHD yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Desa VF-24N-MHD, VF-24P-MHD, VF-18N-MHD, VF-18P-MHD, VF-18P-MHD - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Desa VF-24N-MHD, VF-24P-MHD, VF-18N-MHD, VF-18P-MHD, VF-18P-MHD you will learn all the available features of the product, as well as information on its operation. The information that you get Desa VF-24N-MHD, VF-24P-MHD, VF-18N-MHD, VF-18P-MHD, VF-18P-MHD will certainly help you make a decision on the purchase.
If you already are a holder of Desa VF-24N-MHD, VF-24P-MHD, VF-18N-MHD, VF-18P-MHD, VF-18P-MHD, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Desa VF-24N-MHD, VF-24P-MHD, VF-18N-MHD, VF-18P-MHD, VF-18P-MHD.
However, one of the most important roles played by the user manual is to help in solving problems with Desa VF-24N-MHD, VF-24P-MHD, VF-18N-MHD, VF-18P-MHD, VF-18P-MHD. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Desa VF-24N-MHD, VF-24P-MHD, VF-18N-MHD, VF-18P-MHD, VF-18P-MHD along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
