Table of Contents
Advertisement
UNVeNTed (VeNT-FRee) BlUe FlAMe GAs HeATeR
sAFeTY INFoRMATIoN ANd INsTAllATIoN MANUAl
GWN20TA, GWP20TA, GWN30TA, GWP30TA, WMN20A, WMP20A
WARNING: If the information in this manual is not fol-
lowed 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.
— WHAT TO DO IF YOU SMELL GAS
• 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.
— Installation and service must be performed by a quali-
fied installer, service agency or the gas supplier.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
For more information, visit www.desatech.com
Models
Advertisement
Table of Contents
Related Manuals for Desa GWN20TA
Summary of Contents for Desa GWN20TA
- Page 1 UNVeNTed (VeNT-FRee) BlUe FlAMe GAs HeATeR sAFeTY INFoRMATIoN ANd INsTAllATIoN MANUAl GWN20TA, GWP20TA, GWN30TA, GWP30TA, WMN20A, WMP20A WARNING: If the information in this manual is not fol- lowed exactly, a fire or explosion may result causing property damage, personal injury or loss of life.
-
Page 2: Table Of Contents
Safety Information ... Local Codes... 4 Product Identification ... 4 Unpacking... 4 Product Features ... 4 Air For Combustion And Ventilation ... 5 Installation ... 7 Operating Heater ... 15 Inspecting Heater ... 17 Cleaning and Maintenance ... 18 sAFeTY INFoRMATIoN WARNING: Improper in- stallation, adjustment, al-... -
Page 3: Safety Information
sAFeTY INFoRMATIoN Continued Natural and Propane/LP Gas: pane/LP gases are fuel gases. Fuel gases are odorless. An odor-making agent is added to fuel gases. The odor helps you detect a fuel gas leak. However, the odor added to fuel gas can fade. Fuel gas may be present even though no odor exists. -
Page 4: Local Codes
sAFeTY INFoRMATIoN Continued 12. Operating heater above elevations of 4,500 feet could cause pilot outage. 13. To prevent performance problems, do not use propane/LP fuel tank of less than 100 lbs. capacity. 14. Provide adequate clearances around air openings. loCAl Codes Install and use heater with care. -
Page 5: Air For Combustion And Ventilation
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. Read the following instructions to insure proper fresh air for this and other fuel-burning appliances in your home. - Page 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 confined or unconfined space. Space: Includes the room in which you will install heater plus any adjoining rooms with doorless passageways or ventilation grills between the rooms.
-
Page 7: Installation
AIR FoR CoMBUsTIoN ANd VeNTIlATIoN 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, you must provide two permanent openings: one within 12" of the ceiling and one within 12"... - Page 8 INsTAllATIoN Continued INSTALLATION ITEMS Before installing heater, make sure you have the items listed below. • for propane/LP gas, external regulator (supplied by installer) • piping (check local codes) • sealant (resistant to propane/LP gas) • equipment shutoff valve * •...
- Page 9 INsTAllATIoN Continued THERMOSTAT SENSING BULB (Thermostat Models Only) The thermostat sensing bulb has been placed below the heater. 1. Place clamp on thermostat sensing bulb as shown in Figure 5. Clamp is provided in hardware package. 2. Snap clamp into upper mounting hole as shown in Figure 5.
- Page 10 INsTAllATIoN Continued 2. Mark screw locations on wall (see Figure 8). Note: Only mark last hole on each end of mounting bracket. Insert mounting screws through these holes only. 3. Remove tape and mounting bracket from wall. 12" 14" (35.6 cm) (30.4 Min.
- Page 11 INsTAllATIoN Continued 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 heater from mounting bracket. 4. If installing bottom mounting screws into hollow or solid wall, install wall anchors.
- Page 12 INsTAllATIoN Continued CONNECTING TO GAS SUPPLY WARNING: This appliance requires a 3/8" NPT (National Pipe Thread) inlet connection to the pressure regulator. WARNING: A qualified ser- vice person must connect heater to gas supply. Follow all local codes. WARNING: For natural gas, never connect heater to private (non-utility) gas wells.
- Page 13 INsTAllATIoN Continued IMPORTANT: Hold the pressure regulator with wrench when connecting it to gas pip- ing and/or fittings. Do not over tighten pipe connection to regulator. The regulator body could be damaged. Pressure Regulator 3/8" NPT Pipe Nipple Tee Joint Reducer Bushing to 1/8"...
- Page 14 INsTAllATIoN Continued 3. Check all joints from gas meter for natural gas (see Figure 17) or propane/LP supply tank for propane/LP gas, to equipment shutoff valve (see Figure 18). Apply a noncorrosive leak detection fluid to all joints. Bubbles forming show a leak. 4.
-
Page 15: Operating Heater
oPeRATING HeATeR FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: If you do not fol- low these instructions exactly, a fire or explosion may result causing property damage, per- sonal injury or loss of life. A. This appliance has a pilot which must be lighted by hand. - Page 16 oPeRATING HeATeR Continued WARNING: Always operate manual control heaters at the locked positions. Operation between these positions may create a possible health hazard if used in a poorly ventilated room. Read owner’s manual for complete instructions. CAUTION: Do not try to ad- just heating levels by using the equipment shutoff valve.
-
Page 17: Inspecting Heater
INsPeCTING HeATeR Check pilot flame pattern and burner flame pattern often. PILOT FLAME PATTERN Figure 22 shows a correct pilot flame pattern. Figure 23 shows an incorrect pilot flame pat- tern. The incorrect pilot flame is not touching the thermocouple. This will cause the thermo- couple to cool. -
Page 18: Cleaning And Maintenance
CleANING ANd MAINTeNANCe WARNING: Turn off heater and let cool before cleaning. CAUTION: You must keep control areas, burner and circu- lating air passageways of heater clean. Inspect these areas of heater before each use. Have heater inspected yearly by a qualified service person. -
Page 19: Troubleshooting
WARNING: Turn off and unplug heater and let cool before servicing. 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 troubleshooting items are listed in order of operation. OBSERvED PROBLEM When ignitor button is pressed, there is no spark at ODS/... - Page 20 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 TRoUBlesHooTING Continued POSSIBLE CAUSE 1. Control knob not fully pressed in 2.
- Page 21 OBSERvED PROBLEM Yellow flame during burner combustion Slight smoke or odor during initial operation Heater produces a whistling noise when burner is lit White powder residue forming within burner box or on adja- cent walls or furniture Heater produces a clicking/ ticking noise just after burner is lit or shut off 119344-01B...
- Page 22 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. Fol- low the gas supplier’s instructions.
-
Page 23: Specifications
Contact authorized dealers of this product. If they can’t supply original replacement part(s), either contact your nearest Parts Central (see page 27) or call DESA Heating Products at 1- 866-672-6040 for referral information. When calling DESA Heating Products, have ready •... -
Page 24: Illustrated Parts Breakdown
IllUsTRATed PARTs BReAkdoWN MODELS WMN20A, WMP20A, GWN20TA, GWP20TA, GWN30TA AND GWP30TA *Manual Control Models Only **Thermostat Models Only www.desatech.com 18** 19** 119344-01B... -
Page 25: Parts List
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 23 of this manual. NO. PART NO. 097159-04 Piezo Ignitor 107673-01 Front Panel 107676-01 Front Panel 103476-01 Grill Guard 103476-0 Grill Guard 100047-07 Gas Control Valve NG 100047-08 Gas Control Valve LP... -
Page 26: Accessories
Purchase these heater accessories from your local dealer. If they can not supply these acces- sories, either contact your nearest Parts Central (see page 27) or call DESA Heating Products at 1-866-672-6040 for referral information. You can also write to the address listed on the back page of this manual. -
Page 27: Parts Centrals
These Parts Centrals are privately owned businesses. They have agreed to support our customer’s needs by providing original replacement parts and accessories. Tool & Equipment Co. 5 Manila Ave Hamden, CT 06514-0322 1-800-397-7553 03-48-7553 Portable Heater Parts 342 N. County Rd. 400 East Valparaiso, IN 46383-9704 19-46-7441 1-888-619-7060... -
Page 28: Warranty Information
We make no other warranty, expressed or implied. lIMITed WARRANTIes FoR NeW ANd FACToRY DESA Heating Products warrants this heater and any parts thereof, to be free of defects New Products: in materials and workmanship for two (2) years from the date of first purchase, when operated and maintained in accordance with the manufacturer's instructions.