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Desa GWP20 GWN20T manual

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Table of contents for the manual

  • Page 1

    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. — Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or[...]

  • Page 2

    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. Improper use of this heater can cause serious injury or dea[...]

  • Page 3

    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. 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 • imme[...]

  • Page 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. Home owners weather strip and caulk around windows and doo[...]

  • Page 5

    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. Space: Includes the room[...]

  • Page 6

    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. When ventilating to an adjoining unconfined space[...]

  • Page 7

    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). If your gas supply is not the correct gas type, do not install heater. Call de[...]

  • Page 8

    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. Locating Thermostat [...]

  • Page 9

    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. Marking Screw Locations 1. T ape mounting bracket to wall where heater will be[...]

  • Page 10

    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.) Mounting Heater To Floor With Optional Floor Kit Installing Bottom Mounting Screws 1. Locate[...]

  • Page 11

    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. You must reduce incoming gas pressure to between 11 and 1[...]

  • Page 12

    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 Propane/LP Gas Figure 16 - Equipment Shutoff Valve Equipment Shutoff Valve Propane/LP Supply Tank Thermostat Gas Valve ON POSIT O PO Open Closed Equipm[...]

  • Page 13

    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. This appliance has a pilot which must be lighted by hand. When lighting the [...]

  • Page 14

    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. 3. With contr ol knob pressed in, strik e match. Hold match to pilot until pi[...]

  • Page 15

    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. Figure 24 shows an incorrect pilot flame pattern. The incorrect pilot flame i[...]

  • Page 16

    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 Pilot Air Inlet Cabinet CLEANING AND MAINTENANCE ODS/PILOT AND BURNER • Use a vacuum cleaner , pressurized air , or small, soft bristled brush to c[...]

  • Page 17

    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. CAUTION: Never use a wire, needle, or similar object to clean ODS/pilot. This [...]

  • Page 18

    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 burner Burner backfiring during combustion Yellow flame during burner combustion Slight smoke or odor during initial operation Heater produces a whistli[...]

  • Page 19

    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. • Immediately call your gas supplier from a neighbor ’ s phone. Follow the[...]

  • Page 20

    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 19 4 7 1 21 22 15 17 20 ILLUSTRA TED P AR TS BREAKDOWN GN30, GP30 GWN20, GWP20 WMN20, WMP20[...]

  • Page 21

    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. PARTS LIST GN30, GP30 GWN20, GWP20, WMN20, WMP20 PART NUMBER FOR KEY GWN20[...]

  • Page 22

    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 14 16 18 19 4 7 1 15 17 20 ILLUSTRATED PARTS BREAKDOWN GN30T, GP30T GWN20T, GWP20T, GWN30T, GWP30T[...]

  • Page 23

    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. PARTS LIST GGN30T, GP30T GWN20T, GWP20T, GWN30T, GWP30T KEY PART NUMBER FO[...]

  • Page 24

    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 PUBLICATIONS WMN20 GN30, GN30T GWN20 GWN30T GWN20T Btu (Variable) 15,000/30,000 10,000/20,000 Type Gas Natural Only Natural Only Ignition Piezo Piezo Pressure Re[...]

  • Page 25

    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. If you bought this product yourself, did you plan to purchase this type of product before[...]

  • Page 26

    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[...]

  • Page 27

    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. Thermostatically-controlled, blower turns itself on and off as required. ACCESSORIES Pu[...]

  • Page 28

    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. The only warranty applicable is our standard written[...]