Desa GWP20TA, GWP30TA Cleaning Maintenance, ODS/PILOT and Burner, Burner Pilot Air Inlet, Cabinet

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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. Heater may need more frequent clean- ing due to excessive lint from carpeting, bedding material, pet hair, etc.

WARNING: Failure to keep the primary air opening(s) of the burner(s) clean may result in sooting and property damage.

ODS/PILOT AND BURNER

Use a vacuum cleaner, pressurized air or small, soft bristled brush to clean.

Burner Pilot Air Inlet

The primary air inlet holes allow the proper amount of air to mix with the gas. This pro- vides a clean burning flame. Keep these holes clear of dust, dirt and lint. Clean these air inlet holes prior to each heating season. Blocked air holes will create soot. We recommend that you clean the unit every three months during operation and have heater inspected yearly by a qualified service person.

We also recommend that you keep the burner tube and pilot assembly clean and free of dust and dirt. To clean these parts we recommend using compressed air no greater than 30 PSI. Your local computer store, hardware store or home center may carry compressed air in a can. If using compressed air in a can, please follow the directions on the can. If you don’t follow directions on the can, you could dam- age the pilot assembly.

1.Shut off the unit, including the pilot. Allow the unit to cool for at least thirty min- utes.

2.Inspect burner, pilot for dust and dirt.

3.Blow air through the ports/slots and holes in the burner.

4.Never insert objects into the pilot tube.

Clean the pilot assembly also. A yellow tip on the pilot flame indicates dust and dirt in the pilot assembly. There is a small pilot air inlet about two inches from where the pilot flame comes out of the pilot assembly (see Figure 26). With the unit off, lightly blow air through the air inlet. You may blow through a drinking straw if compressed air is not available.

Pilot Assembly

Pilot Air Inlet

Figure 26 - Pilot Inlet Air

(Propane/LP Pilot Shown)

CABINET

Air Passageways

Use pressurized air to clean.

Exterior

Use a soft cloth dampened with a mild soap and water mixture. Wipe the cabinet to re- move dust.

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119344-01B

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Contents What to do if YOU Smell GAS Models GWN20TA, GWP20TA, GWN30TA, GWP30TA, WMN20a, WMP20aTable of Contents Safety InformationSafety Information Local Codes Safety InformationProduct Features UnpackingUnusually Tight Construction Air For Combustion VentilationProviding Adequate Ventilation Confined and Unconfined SpaceAIR for Combustion Ventilation Determining FRESH-AIR Flow for Heater LocationDetermining if You Have a Confined or Unconfined Space Check GAS Type InstallationVentilation AIR Ventilation Air From Inside BuildingLocating Heater InstallationInstallation Items This heater is designed to be mounted on a wallInstalling Heater to Wall Attaching To Wall Stud Method 30,000 Btu/Hr Models20,000 Btu/Hr Models Attaching To Wall Anchor MethodHeater Wall Installing Bottom Mounting ScrewsMounting heater to floor With optional floor kit Mounting Base Feet to HeaterConnecting to GAS Supply Typical Inlet Pipe DiametersChecking GAS Connections Test Pressures Equal To or Less Than 1/2 Psig 3.5 kPaPressure Testing Heater Gas Connections Correct all leaks at onceLighting Instructions For Your Safety Read Before LightingOperating Heater Do not try to light any applianceTo Turn OFF GAS To Appliance Manual Lighting ProcedureOperating Heater Thermostat Control OperationInspecting Heater Pilot Flame PatternBurner Flame Pattern Burner Pilot Air Inlet Cleaning MaintenanceODS/PILOT and Burner CabinetTroubleshooting Observed Problem Possible Cause RemedyTroubleshooting Blocked Observe minimum installaSlight smoke or odor during Burner orificeGas leak. See Warning Statement aboveReplacement Parts SpecificationsService Hints Technical ServiceIllustrated Parts Breakdown Models WMN20A, WMP20A, GWN20TA, GWP20TA, GWN30TA and GWP30TAParts List NJF 8CBase Kit GA4550 AccessoriesEquipment Shutoff Valve GA5010 Electronic ignitor Kit GA435 Not ShownParts Centrals Model Serial No Date of Purchase Warranty InformationKeep this Warranty Industrial Drive P.O. Box 119344-01 Rev. B