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UNVENTED (VENT-FREE)
BLUE FLAME GAS HEATER
TM
SAFETY INFORMATION AND INSTALLATION MANUAL
For more information, visit www.desatech.com
For more information, visit www.desatech.com
GN30, GP30
GN30T, GP30T
GWN20, GWP20
GWN20T, GWP20T
GWN30T, GWP30T
WMN20, WMP20
WARNING: Improper installation,
WARNING: If the information in this manual is not
adjustment, alteration, service, or
followed exactly, a fire or explosion may result caus-
maintenance can cause injury or
ing property damage, personal injury
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TABLE OF CONTENTS 2 SAFETY INFORMATION TABLE OF CONTENTS SAFETY INFORMATION ............................................................ 2 ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST ....... 20 LOCAL CODES ........................................................................... 3 SPECIFICATIONS .................................................................... 24 PRODUCT IDENTIFICATION ..................................................... 3 SERVICE HINTS......................................
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SAFETY INFORMATION 3 LOCAL CODES 3 PRODUCT IDENTIFICATION UNPACKING PRODUCT FEATURES SAFETY INFORMATION PRODUCT Continued IDENTIFICATION Control Knob 4. If you smell gas Ignitor Button • 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 you cannot reach your gas supplier, call the fire depart- ment 5. This heat
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AIR FOR COMBUSTION AND VENTILATION Providing Adequate Ventilation 4 AIR FOR COMBUSTION AND VENTILATION Unusually tight construction is defined as construction WARNING: This heater shall not be installed in a where: confined space or unusually tight construction un- a. walls and ceilings exposed to the outside atmosphere less provisions are provided for adequate combustion have a continuous water vapor retarder with a rating and ventilation air. Read the following instructions to -11 2 of one pe
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AIR FOR COMBUSTION AND VENTILATION 5 Determining Fresh-Air Flow For Heater Location 5 AIR FOR COMBUSTION AND VENTILATION Continued 4. Compare the maximum Btu/Hr the space can support with the actual DETERMINING FRESH-AIR FLOW FOR amount of Btu/Hr used. HEATER LOCATION __________________ Btu/Hr (maximum the space can support) Determining if You Have a Confined or __________________ Btu/Hr (actual amount of Btu/Hr used) Unconfined Space Example: 51,200 Btu/Hr (maximum the space can support) Use th
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AIR FOR COMBUSTION AND VENTILATION Ventilation Air 6 AIR FOR COMBUSTION AND VENTILATION Continued VENTILATION AIR 12" Ventilation Air From Inside Building This fresh air would come from an adjoining unconfined space. When ventilating to an adjoining unconfined space, you must provide two permanent openings: one within 12" of the ceiling and Ventilation Grills Into Adjoining Room, one within 12" of the floor on the wall connecting the two spaces Ventilation Option 2 (see options 1 and 2, Figure
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INSTALLATION 7 Check Gas Type 7 Installation Items Locating Heater INSTALLATION NOTICE: This heater is intended for use as supple- WARNING: Never install the heater mental heat. Use this heater along with your primary • in a bedroom or bathroom heating system. Do not install this heater as your • in a recreational vehicle primary heat source. If you have a central heating • where curtains, furniture, clothing, or other flam- system, you may run system’s circulating blower mable objects are less
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INSTALLATION Thermostat Sensing Bulb 8 Installing Heater To Wall INSTALLATION Continued THERMOSTAT SENSING BULB Removing Front Panel Of Heater (Thermostat Models Only) 1. Remove the four painted screws, two on each side of front panel. The thermostat sensing bulb has been placed inside the heater for 2. Pull bottom of front panel forward, then out. protection during shipping. 3. Remove any remaining packaging materials. Locating Thermostat Sensing Bulb (for thermostat applications) 1. Remove fro
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INSTALLATION 9 Installing Heater To Wall (Cont.) 9 INSTALLATION Continued 3. Insert mounting screws through bracket and into wall studs. Marking Screw Locations 4. Tighten screws until mounting bracket is firmly fastened to 1. Tape mounting bracket to wall where heater will be located. wall studs. Make sure mounting bracket is level. Attaching To Wall Anchor Method WARNING: Maintain minimum clearances shown For attaching mounting bracket to hollow walls (wall areas between in Figure 8. If you c
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INSTALLATION Installing Heater To Wall (Cont.) 10 Mounting Heater To Floor With Optional Floor Kit INSTALLATION Continued Installing Bottom Mounting Screws MOUNTING HEATER TO FLOOR WITH OPTIONAL FLOOR KIT 1. Locate two bottom mounting holes. These holes are near bot- tom on back panel of heater (see Figure 12). Mounting Base Feet to Heater 2. Mark screw locations on wall. 1. Lay heater cabinet on its back on a table with the heater bot- 3. Remove heater from mounting bracket. tom overhanging the
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INSTALLATION 11 Connecting To Gas Supply 11 INSTALLATION Continued Typical Inlet Pipe Diameters CONNECTING TO GAS SUPPLY 20,000 Btu/Hr Models - 3/8" or greater WARNING: This appliance requires a 3/8" NPT 30,000 Btu/Hr Models - 1/2" or greater (National Pipe Thread) inlet connection to the pres- sure regulator. Installation must include equipment shutoff valve, union, and plugged 1/8" NPT tap. Locate NPT tap within reach for test gauge hook up. NPT tap must be upstream from heater (see Figure 15
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INSTALLATION Checking Gas Connections 12 INSTALLATION Continued CHECKING GAS CONNECTIONS Pressure Testing Heater Gas Connections 1. Open equipment shutoff valve (see Figure 16). WARNING: Test all gas piping and connections 2. For natural gas open main gas valve located on or near gas for leaks after installing or servicing. Correct all leaks meter. For propane/LP gas open propane/LP supply tank valve. at once. 3. Make sure control knob of heater is in the OFF position. 4. Check all joints from
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OPERATING HEATER (MANUAL CONTROL MODELS) 13 For Your Safety Read Before Lighting 13 Lighting Instructions OPERATING HEATER 5. Press in control knob and turn counterclockwise MANUAL CONTROL MODELS to the PILOT position. Keep control knob pressed in for five (5) seconds (see Figure 19). FOR YOUR SAFETY READ Note: You may be running this heater for the first time after hooking up to gas supply. If so, the control knob may BEFORE LIGHTING need to be pressed in for 30 seconds or more. This will al-
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OPERATING HEATER (MANUAL CONTROL MODELS) To Turn Off Gas To Appliance 14 Manual Lighting Procedure OPERATING HEATER (THERMOSTAT CONTROLLED MODELS) For Your Safety Read Before Lighting Lighting Instructions OPERATING HEATER Continued C. Use only your hand to push in or turn the gas control knob. TO TURN OFF GAS TO APPLIANCE Never use tools. If the knob will not push in or turn by hand, don’t try to repair it, call a qualified service techni- Shutting Off Heater cian or gas supplier. Force or atte
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OFF HI OPERATING HEATER (THERMOSTAT CONTROLLED MODELS) 15 15 Lighting Instructions (Cont.) Thermostat Control Operation Manual Lighting Procedure INSPECTING HEATER Pilot Flame Pattern OPERATING HEATER Continued Note: The thermostat sensing bulb measures the temperature CAUTION: Do not try to adjust heating levels by of air near the heater cabinet. This may not always agree with using the equipment shutoff valve. room temperature (depending on housing construction, instal- lation location, room
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INSPECTING HEATER Burner Flame Pattern 16 CLEANING AND MAINTENANCE ODS/Pilot and Burner Cleaning Burner Pilot Air Inlet Cabinet INSPECTING HEATER Continued BURNER FLAME PATTERN ODS/PILOT AND BURNER • Use a vacuum cleaner, pressurized air, or small, soft bristled WARNING: If yellow tipping occurs, your heater brush to clean. could produce increased levels of carbon monoxide. CLEANING BURNER PILOT AIR INLET The primary air inlet holes allow the proper amount of air to mix with NOTICE: Do not mist
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TROUBLESHOOTING 17 17 TROUBLESHOOTING WARNING: Turn off and un- CAUTION: Never use a wire, plug heater and let cool before needle, or similar object to clean Note: For additional help, visit DESA servicing. Only a qualified ser- ODS/pilot. This can damage ODS/ International’s technical service web site vice person should service and pilot unit. at www.desatech.com. repair heater. Note: All troubleshooting items are listed in order of operation. OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignit
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TROUBLESHOOTING 18 TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Burner does not light after ODS/pilot is lit 1. Burner orifice is clogged 1. Clean burner (see Cleaning and Mainte- nance, page 16) or replace burner orifice 2. Inlet gas pressure is too low 2. Contact local natural or propane/LP gas company Delayed ignition of burner 1. Manifold pressure is too low 1. Contact local natural or propane/LP gas company 2. Burner orifice is clogged 2. Clean burner (see Cleaning and M
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TROUBLESHOOTING 19 19 TROUBLESHOOTING Continued 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 you cannot reach your gas supplier, call the fire department. IMPORTANT: Operating heater where impurities in air exist may create odors. Cleaning supplies, paint, paint remover, ci
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ILLUSTRATED PARTS BREAKDOWN GN30, GP30 GWN20, GWP20, WMN20, WMP20 20 ILLUSTRATED PARTS BREAKDOWN 15 7 GN30, GP30 1 20 GWN20, GWP20 WMN20, WMP20 21 4 22 9 17 12 13 11 10 18 9 14 19 8 16 6 3 5 2 For more information, visit www.desatech.com For more information, visit www.desatech.com 107884
