Desa GWP20 - Manuals - manualsarea.com

Page 2 - TABLE OF CONTENTS

www.desatech.com 107884-01H 2 WARNING: Improper installation, adjustment, altera-tion, service, or maintenance can cause injury or prop-erty damage. Refer to this manual for correct installationand operational procedures. For assistance or addi-tional information consult a qualified installer, servi...

Page 3 - SAFETY INFORMATION; DANGER: Carbon monoxide; Carbon Monoxide Poisoning:; Get; WARNING: Any change to

www.desatech.com 107884-01H 3 SAFETY INFORMATION IMPORTANT: Read this owner’smanual carefully and completelybefore trying to assemble, oper-ate, or service this heater. Im-proper use of this heater cancause serious injury or deathfrom burns, fire, explosion, elec-trical shock, and carbon mon-oxide p...

Page 4 - Ignitor Button

www.desatech.com 107884-01H 4 6. Keep all air openings in front and bottom of heater clear and free of debris. This will in-sure enough air for proper combustion. 7. If heater shuts off, do not relight until you pro- vide fresh, outside air. If heater keeps shut-ting off, have it serviced. 8. Do not...

Page 5 - WARNING: This heater shall; The following are excerpts from; b. weather stripping has been added on; The National Fuel Gas Code,

www.desatech.com 107884-01H 5 AIR FOR COMBUSTION AND VENTILATION WARNING: This heater shall not be installed in a confinedspace or unusually tight con-struction unless provisions areprovided for adequate combus-tion and ventilation air. Readthe following instructions to in-sure proper fresh air for ...

Page 6 - Continued; tilation Air From Inside Building; WARNING: If the area in

www.desatech.com 107884-01H 6 AIR FOR COMBUSTION AND VENTILATION Continued DETERMINING FRESH-AIR FLOWFOR HEATER LOCATION Determining if You Have a Confined orUnconfined Space Use this work sheet to determine if you have a con-fined or unconfined space. Space: Includes the room in which you will inst...

Page 7 - Figure 3 - Ventilation Air from Outdoors; VENTILATION AIR; Ventilation Air From Inside Building; National Fuel Gas; Ventilation Air From Outdoors; for required size of ventilation grills or ducts.; Figure 2 - Ventilation Air from Inside; AIR FOR COMBUSTION; INSTALLATION; CHECK GAS TYPE; WARNING: This appliance

www.desatech.com 107884-01H 7 Figure 3 - Ventilation Air from Outdoors VENTILATION AIR Ventilation Air From Inside Building This fresh air would come from an adjoining un-confined space. When ventilating to an adjoiningunconfined space, you must provide two perma-nent openings: one within 12" of...

Page 8 - INSTALLATION ITEMS; Accessorie; LOCATING HEATER; This heater is designed to be mounted on a wall.; WARNING: Maintain the; WARNING: Never install the; Figure 4 - Mounting Clearances As; Vent-free heaters add moisture to; CAUTION: If you install the; Accessories

www.desatech.com 107884-01H 8 INSTALLATION ITEMS Before installing heater, make sure you have theitems listed below.• for propane/LP gas, external regulator (supplied by installer) • piping (check local codes)• sealant (resistant to propane/LP gas)• equipment shutoff valve *• ground joint union• sed...

Page 9 - Snap clamp into upper mounting hole as shown; Figure 5 - Attaching Thermostat Sensing; INSTALLING HEATER TO WALL; Mounting Bracket; Clamp; Figure 6 - Mounting Bracket; Remove the four painted screws, two on each; Marking Screw Locations; Tape mounting bracket to wall where heater

www.desatech.com 107884-01H 9 INSTALLATION Continued THERMOSTAT SENSING BULB(Thermostat Models Only) The thermostat sensing bulb has been placed be-low the heater.1. Place clamp on thermostat sensing bulb as shown in Figure 5. Clamp is provided in hard-ware package. 2. Snap clamp into upper mounting...

Page 10 - Attaching Mounting Bracket To Wall; Adjoining Wall; Horizontal Slots; Attaching To Wall Anchor Method

www.desatech.com 107884-01H 10 INSTALLATION Continued 30,000 Btu/Hr Models 20,000 Btu/Hr Models Figure 8 - Mounting Bracket Clearances Attaching Mounting Bracket To Wall Note: Wall anchors, mounting screws, and spac- ers are in hardware package. The hardware pack-age is provided with heater. Attachi...

Page 11 - Wall; Installing Bottom Mounting Screws; Attaching To Wall; Mounting Base Feet to Heater; Sheet Metal Screw

www.desatech.com 107884-01H 11 Figure 12 - Installing Bottom Mounting Screws Side View Front View Wall Spacer Heater Installing Bottom Mounting Screws 1. Locate two bottom mounting holes. These holes are near bottom on back panel of heater(see Figure 12). 2. Mark screw locations on wall.3. Remove he...

Page 12 - CONNECTING TO GAS SUPPLY; For natural gas, check gas line; Figure 14 - External Regulator With Vent; External Regulator; Typical Inlet Pipe Diameters; Install an equipment shutoff valve; WARNING: Use pipe joint

www.desatech.com 107884-01H 12 CONNECTING TO GAS SUPPLY WARNING: This appliance requires a 3/8" NPT (NationalPipe Thread) inlet connection tothe pressure regulator. WARNING: A qualified ser- vice person must connect heaterto gas supply. Follow all localcodes. WARNING: For natural gas, never conn...

Page 13 - CHECKING GAS CONNECTIONS; Natural Gas; Tee Joint; WARNING: Never use an; Figure 15 - Gas Connection; Open

www.desatech.com 107884-01H 13 * A CSA design-certified equipment shutoff valvewith 1/8" NPT tap is an acceptable alternative totest gauge connection. Purchase the optional CSAdesign-certified equipment shutoff valve from yourdealer. See Accessories , page 30. CHECKING GAS CONNECTIONS WARNING: T...

Page 14 - Figure 18 - Checking Gas Joints for; Figure 17 - Checking Gas Joints for; Equipment Shutoff Valve

www.desatech.com 107884-01H 14 2. Pressurize supply piping system by either opening propane/LP supply tank valve forpropane/LP gas or opening main gas valve lo-cated on or near gas meter for natural gas, orusing compressed air. 3. Check all joints from gas meter for natural gas (see Figure 17) or pr...

Page 15 - OPERATING HEATER; MANUAL CONTROL MODELS; Figure 19 - Control Knob In The OFF; Ignitor Electrode

www.desatech.com 107884-01H 15 5. Press in control knob and turn counter- clockwise to the PILOT position. Keep control knob pressed in for five (5)seconds (see Figure 19). Note: You may be running this heater for the first time after hooking up to gas sup-ply. If so, the control knob may need to be...

Page 16 - Figure 21 - Control Knob In The OFF; Shutting Off Heater; structions

www.desatech.com 107884-01H 16 OPERATING HEATER Continued WHAT TO DO IF YOU SMELL GAS• Do not try to light any appliance.• Do not touch any electric switch; do not use any phone in your building. • Immediately call your gas supplier from a n e i g h b o r ’s p h o n e . Fo l l ow t h e g a ssupplier...

Page 17 - Manual Lighting Procedure

www.desatech.com 107884-01H 17 Figure 22 - Pilot (actual pilot may vary) 6. With control knob pressed in, push down and release ignitor button. This will lightpilot. The pilot is attached to the front ofburner. The pilot is attached to the front ofthe burner. If needed, keep pressing igni-tor button...

Page 18 - BURNER FLAME PATTERN; WARNING: If yellow tipping; INPECTING HEATER; PILOT FLAME PATTERN; • see; Figure 24 - Incorrect Pilot Flame Pattern

www.desatech.com 107884-01H 18 BURNER FLAME PATTERN WARNING: If yellow tipping occurs, your heater could pro-duce increased levels of carbonmonoxide. NOTICE: Do not mistake orangeflames with yellow tipping. Dirtor other fine particles enter theheater and burn causing briefpatches of orange flame. Fi...

Page 19 - WARNING: Turn off heater; soft bristled brush to clean.; BURNER PILOT AIR INLET; Figure 27 - Pilot Inlet Air; Pilot Air Inlet; CABINET; Air Passageways; • Use a vacuum cleaner or pressurized air to clean.; Exterior; • Use a soft cloth dampened with a mild soap and

www.desatech.com 107884-01H 19 CLEANING AND MAINTENANCE WARNING: Turn off heater and let cool before cleaning. CAUTION: You must keep control areas, burner, and cir-culating air passageways ofheater clean. Inspect these ar-eas of heater before each use.Have heater inspected yearly bya q u a l i f i ...

Page 20 - TROUBLESHOOTING; WARNING: Turn off and unplug heater and let cool before servic-; POSSIBLE CAUSE; Cleaning

www.desatech.com 107884-01H 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. This can damage ODS/pilot unit. Note: All tro...

Page 22 - nance

www.desatech.com 107884-01H 22 TROUBLESHOOTING Continued OBSERVED PROBLEM Yellow flame during burner com-bustion Slight smoke or odor during ini-tial operation Heater produces a whistling noisewhen burner is lit White powder residue formingwithin burner box or on adjacentwalls or furniture POSSIBLE ...

Page 23 - IMPORTANT; OBSERVED PROBLEM

www.desatech.com 107884-01H 23 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 gas supplier’s instructions. • If y...

Page 24 - SPECIFICATIONS

www.desatech.com 107884-01H 24 SPECIFICATIONS GN30, GN30T WMN20, GWN20 GWN30T GWN20T Btu (Variable) 15,000/30,000 10,000/20,000 Type Gas Natural Only Natural Only Ignition Piezo Piezo Pressure Regulator Setting 3" W.C. 3" W.C. Inlet Gas Pressure (in. of water) Maximum 10.5" 10.5" Min...

Page 25 - SERVICE HINTS; When Gas Pressure Is Too Low; TECHNICAL SERVICE; Use only original replacement parts. This; PARTS UNDER WARRANTY; Parts Central

www.desatech.com 107884-01H 25 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 lowYou may feel your gas pressure is too low. Ifso, contact your local natural or propane/LP ga...

Page 26 - ILLUSTRATED PARTS BREAKDOWN

www.desatech.com 107884-01H 26 2 3 5 6 8 9 9 10 11 12 13 14 16 18 19 4 7 1 21 22 15 17 20 ILLUSTRATED PARTS BREAKDOWN MODELSGN30, GP30GWN20, GWP20WMN20, WMP20

Page 27 - PARTS LIST; Replacement Parts; PART NUMBER FOR

www.desatech.com 107884-01H 27 PARTS LIST This list contains replaceable parts used in your heater. When ordering parts, follow the instructionslisted under Replacement Parts on page 25 of this manual. PART NUMBER FOR KEY GWN20 GWP20 NO. GN30 GP30 WMN20 WMP20 DESCRIPTION QTY. 1 097159-04 097159-04 0...

Page 30 - ACCESSORIES

www.desatech.com 107884-01H 30 ACCESSORIES Purchase these heater accessories from your localdealer. If they can not supply these accessories, ei-ther contact your nearest Parts Central (see page 31) or call DESA Heating Products at 1-866-672-6040for referral information. You can also write to theadd...

Page 31 - PARTS CENTRALS; East Coast Energy Products

www.desatech.com 107884-01H 31 Baltimore Electric 1348 Dixwell AvenueHamden, CT 06514-03221-800-397-7553203-248-7553Parts Department Portable Heater Parts 342 N. County Rd. 400 EastValparaiso, IN 46383-9704All States219-462-74411-888-619-7060sales@portableheaterparts.comtechservice@portableheaterpar...

Page 32 - NOT A UPC; LIMITED WARRANTY; WARRANTY INFORMATION; KEEP THIS WARRANTY

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 ourstandard written warranty. We make no other warranty, expressed or implied. 107884-01Rev. H03/04 2701 Industri...