Instruction/ maintenance manual of the product WMP20 Desa
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TM For more information, visit www.desatech.com For more information, visit www.desatech.com WARNING: If the information in this manual is not followed exactly, a fire or explosion may result caus- ing property damage, personal injury, or loss of life.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 2 TABLE OF CONTENTS SAFETY INFORMATION WARNING ICON G 001 WARNINGS IMPORTANT: Read this owner ’ s manual carefully and completely before trying to assemble, operate, or ser- vice this heater.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 3 3 SAFETY INFORMATION LOCAL CODES PRODUCT IDENTIFICATION UNPACKING PRODUCT FEATURES 4.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 4 AIR FOR COMBUSTION AND VENTILA TION Today’s homes are built more energy efficient than ever. New materials, increased insulation, and new construction methods help reduce heat loss in homes.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 5 5 AIR FOR COMBUSTION AND VENTILA TION 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.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 6 Figure 3 - Ventilation Air from Outdoors AIR FOR COMBUSTION AND VENTILA TION Continued VENTILATION AIR Ventilation Air From Inside Building This fresh air would come from an adjoining unconfined space.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 7 7 INST ALLA TION WARNING: A qualified service person must in- stall heater. Follow all local codes. CHECK GAS TYPE Use only the correct type of gas (natural or propane/LP).
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 8 INSTALLATION Thermostat Sensing Bulb Installing Heater To Wall INST ALLA TION Continued THERMOSTAT SENSING BULB (Thermostat Models Only) The thermostat sensing bulb has been placed inside the heater for protection during shipping.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 9 9 INSTALLATION Installing Heater To Wall (Cont.) WARNING: Maintain minimum clearances shown in Figure 8. If you can, provide greater clearances from floor and joining wall.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 10 Figure 12 - Installing Bottom Mounting Screws Side View Front View Wall Spacer Heater INST ALLA TION Continued INSTALLATION Installing Heater To Wall (Cont.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 11 11 INST ALLA TION Continued INSTALLATION Connecting To Gas Supply For propane/LP gas, the installer must supply an external regulator. The external regulator will reduce incoming gas pressure.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 12 INST ALLA TION Continued INSTALLATION Checking Gas Connections Figure 18 - Checking Gas Joints for P.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 13 13 OFF IGNITOR OPERATING HEATER (MANUAL CONTROL MODELS) For Your Safety Read Before Lighting Lighting Instructions OPERA TING HEA TER FOR YOUR SAFETY READ BEFORE LIGHTING A.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 14 TO TURN OFF GAS TO APPLIANCE OPERA TING HEA TER Continued 1. Remove fr ont panel (see Figure 7, page 8). 2. F ollow steps 1 thr ough 5 under Lighting Instructions, page 13.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 15 15 IGNITOR PILOT L O O FF HI INSPECTING HEA TER Check pilot flame pattern and burner flame pattern often. PILOT FLAME PATTERN Figure 23 shows a correct pilot flame pattern.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 16 INSPECTING HEATER Burner Flame Pattern CLEANING AND MAINTENANCE ODS/Pilot and Burner Cleaning Burner.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 17 17 TROUBLESHOOTING TROUBLESHOOTING WARNING: Turn off and un- plug heater and let cool before servicing. Only a qualified ser- vice person should service and repair heater.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 18 TROUBLESHOOTING OBSERVED PROBLEM Burner does not light after ODS/pilot is lit Delayed ignition of bu.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 19 19 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.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 20 ILLUSTRATED PARTS BREAKDOWN GN30, GP30 GWN20, GWP20, WMN20, WMP20 2 3 5 6 8 9 9 10 11 12 13 14 16 18.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 21 21 P ARTS LIST This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 24 of this manual.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 22 ILLUSTRA TED P AR TS BREAKDOWN GN30T, GP30T GWN20T, GWP20T GWN30T, GWP30T 2 3 5 6 8 9 10 10 11 12 13.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 23 23 P ARTS LIST This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 24 of this manual.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 24 SPECIFICA TIONS SPECIFICATIONS REPLACEMENT PARTS SERVICE HINTS TECHNICAL SERVICE SERVICE PUBLICATION.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 25 25 1. Where will the product be used? ❍ Living/Family Room ❍ Office/W arehouse ❍ Utility Shed/Outbuilding ❍ Garage ❍ Bedroom ❍ Bathroom ❍ Other 2.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 26 2701 Industrial Drive P.O. Box 90004 Bowling Green, KY 42102-9004 Postage Required TM.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 27 27 FAN KITS - GA3250T For all models. Provides better heat distribution. Makes heater more efficient. Complete instal- lation and operating instructions included.
107884 For more information, visit www.desatech.com For more information, visit www.desatech.com 28 KEEP THIS WARRANTY W ARRANTY INFORMA TION Always specify model and serial numbers when communicating with the factory. We reserve the right to amend these specifications at any time without notice.
An important point after buying a device Desa WMP20 (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 WMP20 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 WMP20 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Desa WMP20 you will learn all the available features of the product, as well as information on its operation. The information that you get Desa WMP20 will certainly help you make a decision on the purchase.
If you already are a holder of Desa WMP20, 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 WMP20.
However, one of the most important roles played by the user manual is to help in solving problems with Desa WMP20. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Desa WMP20 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
