Instruction/ maintenance manual of the product GMP26 Desa
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WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing 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 any other appliance.
www.desatech.com 113048-01C 2 WARNING: Improper installation, adjustment, altera- tion, service, or maintenance can cause injury or prop- erty damage. Refer to this manual for correct installation and operational procedures. For assistance or addi- tional information consult a qualified installer, service agency, or the gas supplier.
www.desatech.com 3 113048-01C SAFETY INFORMATION WARNING: This product con- tains and/or generates chemicals known to the State of California to cause cancer or birth defects, or other reproductive harm. IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, oper- ate, or service this heater.
www.desatech.com 113048-01C 4 SAFETY INFORMATION Continued PRODUCT IDENTIFICATION Figure 1 - Vent-Free Gas Heater Ignitor Button Control Knob Heater Cabinet Front Panel Glass Panel Grill Guard 5. This heater needs fresh, outside air ventila- tion to run properly .
www.desatech.com 5 113048-01C AIR FOR COMBUSTION AND VENTILATION WARNING: This heater shall not be installed in a confined space or unusually tight con- struction unless provisions are provided for adequate combus- tion and ventilation air.
www.desatech.com 113048-01C 6 AIR FOR COMBUSTION AND VENTILATION 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 con- fined or unconfined space.
www.desatech.com 7 113048-01C Figure 3 - Ventilation Air from Outdoors Figure 2 - Ventilation Air from Inside Building Or Remove Door into Adjoining Room, Option 3 Ventilation Grills Into Adjoining Ro.
www.desatech.com 113048-01C 8 INSTALLATION ITEMS Before installing heater , make sure you have the items listed below . • external regulator (supplied by installer) • piping (check local codes) .
www.desatech.com 9 113048-01C INSTALLATION Continued Figure 5 - Attaching Thermostat Sensing Bulb Figure 7 - Removing Front Panel Of Heater Clamp Thermostat Sensing Bulb Figure 6 - Mounting Bracket THERMOSTAT SENSING BULB (Thermostat Models Only) The thermostat sensing bulb has been placed be- low the heater .
www.desatech.com 113048-01C 10 INSTALLATION Continued 30,000 Btu/Hr Models 20,000 Btu/Hr Models Figure 8 - Mounting Bracket Clearances 18 3 / 4 " Min. 12" Min. 14" Adjoining Wall Only Insert Mounting Screws Through Last Hole On Each End Floor 14" 18 3 / 4 " Min.
www.desatech.com 11 113048-01C Figure 12 - Installing Bottom Mounting Screws Side View Front View Wall Spacer Heater INSTALLATION Continued Figure 13 - Installing Base Feet Sheet Metal Screw Wood Screw Base Foot Installing Bottom Mounting Screws 1. Locate two bottom mounting holes.
www.desatech.com 113048-01C 12 INSTALLATION Continued Figure 14 - External Regulator With Vent Pointing Down External Regulator Propane/LP Supply Tank Vent Pointing Down Tee Joint Reducer Bushing to 1/8" NPT 1/8" NPT Plug Tap Test Gauge Connection* 3/8" NPT Pipe Nipple Heater Cabinet Equipment Shutoff Valve * 3" Min.
www.desatech.com 13 113048-01C INSTALLATION Continued Apply pipe joint sealant lightly to male NPT threads. This will prevent excess sealant from go- ing into pipe. Excess sealant in pipe could result in clogged heater valves. WARNING: Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.
www.desatech.com 113048-01C 14 OFF IGNITOR Figure 18 - Control Knob In The OFF Position Ignitor Button Control Knob INSTALLATION Continued PRESSURE TESTING HEATER GAS CONNECTIONS 1. Open equipment shutoff valve (see Figure 16, page 13). 2. Open propane/LP supply tank valve.
www.desatech.com 15 113048-01C If pilot does not light • turn control knob clockwise to the OFF position • r epeat steps 5 and 6 If pilot does not stay lit after several tries • r efer to T roubleshooting , page 20 • contact a qualified service person or gas supplier for repairs Until repairs ar e made, light pilot with match.
www.desatech.com 113048-01C 16 OPERATING HEATER Continued Figure 22 - Pilot (actual pilot may vary) Ignitor Electrode Pilot Burner Thermocouple O F F P I L O T Figure 21 - Control Knob In The OFF Position Ignitor Button Control Knob 7. Keep control knob pressed in for 30 sec- onds after lighting pilot.
www.desatech.com 17 113048-01C Figure 23 - Burner Patterns for Infrared Heaters Only Control Knob GMP16T GMP26T OPERATING HEATER Continued O F F P I L O T O F F P I L O T THERMOSTAT CONTROL OPERATION The thermostatic control used on these models differs from standard thermostats.
www.desatech.com 113048-01C 18 1/2 G 1/2 G Figure 26 - Correct Burner Flame Pattern for Blue Flame Heaters Yellow Tipping Figure 27 - Incorrect Burner Flame Pattern for Blue Flame Heaters 1 / 2 Glass .
www.desatech.com 19 113048-01C CLEANING AND MAINTENANCE WARNING: Turn off heater and let cool before cleaning. CAUTION: You must keep control areas, burner, and cir- culating air passageways of heater clean. Inspect these ar- eas of heater before each use.
www.desatech.com 113048-01C 20 TROUBLESHOOTING WARNING: Turn off and unplug heater and let cool before servic- ing. Only a qualified service person should service and repair heater. CAUTION: Never use a wire, needle, or similar object to clean ODS/pilot.
www.desatech.com 21 113048-01C OBSERVED PROBLEM ODS/pilot lights but flame goes out when control knob is released Burner does not light after ODS/ pilot is lit Delayed ignition of burner Burner backfiring during com- bustion REMEDY 1. Press in control knob fully 2 .
www.desatech.com 113048-01C 22 TROUBLESHOOTING Continued OBSERVED PROBLEM Yellow flame during burner com- bustion Slight smoke or odor during ini- tial operation Heater produces a whistling noise when burner is lit White powder residue forming within burner box or on adjacent walls or furniture POSSIBLE CAUSE 1.
www.desatech.com 23 113048-01C 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.
www.desatech.com 113048-01C 24 SPECIFICATIONS GMP30BT GMP20BT Btu (V ariable) 15,000/30,000 10,000/20,000 T ype Gas Propane/LP Only Propane/LP Only Ignition Piezo Piezo Pressure Regulator Setting 8" W .
www.desatech.com 25 113048-01C SERVICE HINTS When Gas Pressure Is Too Low • pilot will not stay lit • burner will have delayed ignition • heater will not produce specified heat • propane/LP gas supply may be low Y ou may feel your gas pressure is too low .
www.desatech.com 113048-01C 26 ILLUSTRATED PARTS BREAKDOWN MODELS GMP16, GMP26, GMP16T, AND GMP26T 14 15 8 5 6 7 4 3 1 2 16 10 9 11 12 13 17 See Pages 28 & 29.
www.desatech.com 27 113048-01C PARTS 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 P ART NUMBER NO . GMP16 GMP26 GMP16T GMP26T DESCRIPTION QTY .
www.desatech.com 113048-01C 28 KEY PART NUMBER NO. GMP16 GMP26 DESCRIPTION QTY. 1 110803-02* 110803-02* ODS/Pilot 1 2 110186-01 110186-01 Thermocouple Kit 1 3 098200-03 098200-03 Control Valve Bracket.
www.desatech.com 29 113048-01C 5 7 6 4 3 1 2 Burner Assembly GMP16T 5 6 7 4 6 3 1 2 Burner Assembly GMP26T KEY PART NUMBER NO. GMP16T GMP26T DESCRIPTION QTY.
www.desatech.com 113048-01C 30 ILLUSTRATED PARTS BREAKDOWN MODELS GMP20BT AND GMP30BT 2 3 5 6 8 9 10 10 11 12 13 14 16 18 19 4 7 1 15 17 20.
www.desatech.com 31 113048-01C PARTS 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 PART NUMBER NO. GMP20BT GMP30BT DESCRIPTION QTY.
Always specify model and serial numbers when communicating with the factory . W e reserve the right to amend these specifications at any time without notice. The only warranty applicable is our standard written warranty . W e make no other warranty , expressed or implied.
An important point after buying a device Desa GMP26 (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 GMP26 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 GMP26 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Desa GMP26 you will learn all the available features of the product, as well as information on its operation. The information that you get Desa GMP26 will certainly help you make a decision on the purchase.
If you already are a holder of Desa GMP26, 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 GMP26.
However, one of the most important roles played by the user manual is to help in solving problems with Desa GMP26. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Desa GMP26 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
