Desa WMP20A - Manuals - manualsarea.com

Page 2 - sAFeTY INFoRMATIoN; WARNING: Improper in; Air for Combustion; section on; known to the State of California; Get fresh air at once!; Have heater; TABle oF CoNTeNTs

www.desatech.com 119344-01B sAFeTY INFoRMATIoN WARNING: Improper in - stallation, adjustment, al - teration, service or mainte- nance can cause injury or property damage. Refer to this manual for correct in- stallation and operational procedures. For assis - tance or additional infor- mation consult...

Page 3 - • do not try to light any appliance; Continued

www.desatech.com 119344-01B 3 Natural and Propane/LP Gas: Natural and pro - 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...

Page 4 - State of Massachusetts:; bedroom and bathroom installation in the; Glass Panel; SAFETY DEvICE

www.desatech.com 119344-01B 4 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 wit...

Page 5 - WARNING: This heater shall; National Fuel; Unusually Tight Construction; and; Confined and Unconfined Space

www.desatech.com 119344-01B 5 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 ai...

Page 6 - WARNING: If the area in; National Fuel Gas Code,

www.desatech.com 119344-01B 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 ins...

Page 7 - Figure 3 - Ventilation Air from Outdoors; vENTILATION AIR; Ventilation Air From Inside Building; National Fuel Gas Code, ANSI; AIR FoR CoMBUsTIoN; INsTAllATIoN; NOTICE: This heater is intended; CHECK GAS TYPE; ventilation Air From Outdoors; National Fuel

www.desatech.com 119344-01B 7 Figure 3 - Ventilation Air from Outdoors 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 ...

Page 8 - INSTALLATION ITEMS; cessorie; LOCATING HEATER; Accessories; Vent-free heaters add moisture

www.desatech.com 119344-01B 8 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 *• ground joint union • s...

Page 9 - THERMOSTAT SENSING BULB; Figure 5 - Attaching Thermostat Sensing; INSTALLING HEATER TO WALL; Mounting Bracket; Figure 7 - Removing Front Panel Of; Removing Front Panel Of Heater; Marking Screw Locations; mum clearances shown in Figure

www.desatech.com 119344-01B 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 ...

Page 10 - Attaching Mounting Bracket To Wall

www.desatech.com 119344-01B 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 spacers are in hardware package. The hard - ware package is provided with heater. Attachin...

Page 11 - Wall; Installing Bottom Mounting Screws; Attaching; MOUNTING HEATER TO FLOOR; Mounting Base Feet to Heater; Figure 13 - Installing Base Feet; Mounting Base Feet to Floor; Removing Front

www.desatech.com 119344-01B 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 h...

Page 12 - CONNECTING TO GAS SUPPLY; WA R N I N G : F o r n a t u r a l; Figure 14 - External Regulator With Vent; Typical Inlet Pipe Diameters

www.desatech.com 119344-01B 1 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. WA R N I N G : F o r n a t u r a...

Page 13 - sories; CHECKING GAS CONNECTIONS; and connections, internal and; Test Gauge Connection*; Natural Gas; Sediment; ing to Gas Supply; Figure 15 - Gas Connection

www.desatech.com 119344-01B 13 * A CSA design-certified equipment shutoff valve with 1/8" NPT tap is an acceptable al - ternative to test gauge connection. Purchase the optional CSA design-certified equipment shutoff valve from your dealer. See Acces- sories , page 26. CHECKING GAS CONNECTIONS W...

Page 15 - oPeRATING HeATeR; FOR YOUR SAFETY READ; low these instructions exactly,; WHAT TO DO IF YOU SMELL GAS; LIGHTING; to the; Figure 20 - Control Knob In The OFF

www.desatech.com 119344-01B 15 6. Thermostat Models: Turn control knob counterclockwise to the PILOT position. Press in control knob for five (5) seconds. Manual Models: Press in and turn control knob counterclockwise to the PI - LOT position. Keep control knob pressed in for five (5) seconds. 7. Wi...

Page 16 - Lighting; manual control heaters at the; Shutting Off Heater; Shutting Off Burner Only (pilot stays lit); to the

www.desatech.com 119344-01B 16 oPeRATING HeATeR Continued THERMOSTAT CONTROL OPERATION The thermostatic control used on these models differs from standard thermostats. Standard thermostats simply turn on and off the burner. The thermostat used on this heater senses the room temperature. The thermost...

Page 17 - BURNER FLAME PATTERN; INsPeCTING HeATeR; PILOT FLAME PATTERN; Figure 23 - Incorrect Pilot Flame Pattern

www.desatech.com 119344-01B 17 BURNER FLAME PATTERN WARNING: If yellow tipping occurs, your heater could pro - duce increased levels of carbon monoxide. NOTICE: Do not mistake orange flames with yellow tipping. Dirt or other fine particles enter the heater and burn causing brief patches of orange fl...

Page 18 - WARNING: Turn off heater; BURNER PILOT AIR INLET; home center may carry compressed air in a; CABINET; Air Passageways; Use pressurized air to clean.; Exterior

www.desatech.com 119344-01B 18 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 s...

Page 19 - TRoUBlesHooTING; WARNING: Turn off and unplug heater and let cool before servicing.; POSSIBLE CAUSE; ing and Maintenance

www.desatech.com 119344-01B 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 troubl...

Page 21 - OBSERvED PROBLEM

www.desatech.com 119344-01B 1 TRoUBlesHooTING Continued 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...

Page 22 - clogged; odors; REMEDY; propane/LP gas company

www.desatech.com 119344-01B 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. • If...

Page 23 - When Gas Pressure Is Too Low; RePlACeMeNT PARTs; Use only original replacement parts.; PARTS UNDER WARRANTY; ready; PARTS NOT UNDER WARRANTY; Parts Central; TeCHNICAl seRVICe; You may have further questions about instal; seRVICe PUBlICATIoNs

www.desatech.com 119344-01B 3 sPeCIFICATIoNs WMN20A, GWN20TA • Btu (Variable): 10,000/20,000 Btu/Hr• Type Gas: Natural Only• Ignition: Piezo• Pressure Regulator Setting: 3" W.C.• Inlet Gas Pressure (in. of water): Maximum - 10.5", Minimum - 4" GWN30TA • Btu (Variable): 15,000/30,000 Btu/...

Page 24 - IllUsTRATed PARTs BReAkdoWN; MODELS

www.desatech.com 119344-01B 4 4* 20 4** 17 18** 19** 2 3 5 6 8 16 9 10 11 12 13 14 18* *Manual Control Models Only**Thermostat Models Only 19* 7 1 21* 22* 15 9 IllUsTRATed PARTs BReAkdoWN MODELS WMN20A, WMP20A, GWN20TA, GWP20TA, GWN30TA AND GWP30TA

Page 25 - PARTs lIsT; Replacement Parts; Cabinet

www.desatech.com 119344-01B 5 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. KEY NO. PART NO. DESCRIPTION QTY. 1 097159-04 Piezo Ignitor • • • • • • 1 107673-01 Front Panel • ...

Page 26 - ACCessoRIes; EQUIPMENT SHUTOFF vALvE; Accessory for “G” models, standard for; ELECTRONIC IGNITOR KIT - GA435; For all piezo ignitor models.

www.desatech.com 119344-01B 6 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...

Page 27 - PARTs CeNTRAls; East Coast Energy; Parts Department; Cans Unlimited

www.desatech.com 119344-01B 7 Tool & Equipment Co. 5 Manila AveHamden, CT 06514-0322 1-800-397-755303-48-7553 Portable Heater Parts 342 N. County Rd. 400 EastValparaiso, IN 46383-9704 19-46-74411-888-619-7060 www.portableheaterparts.comsales@portableheaterparts.comtechservice@portableheaterparts...

Page 28 - NOT A UPC; lIMITed WARRANTIes FoR NeW ANd FACToRY; WARRANTY INFoRMATIoN; keeP THIs WARRANTY; Model

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 warranty. We make no other warranty, expressed or implied. 119344-01 Rev. B 05/06 2701 Indus...