Desa GWP30TA, GWP20TA, GWN30TA, GWN20TA, WMP20A installation manual What to do if YOU Smell GAS

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UNVENTED (VENT-FREE) BLUE FLAME GAS HEATER SAFETY INFORMATION AND INSTALLATION MANUAL

Models

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.

•Immediatelycallyourgassupplierfromaneighbor’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

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Contents Models GWN20TA, GWP20TA, GWN30TA, GWP30TA, WMN20a, WMP20a What to do if YOU Smell GASSafety Information Table of ContentsSafety Information Product Features Safety InformationLocal Codes UnpackingProviding Adequate Ventilation Air For Combustion VentilationUnusually Tight Construction Confined and Unconfined SpaceDetermining FRESH-AIR Flow for Heater Location AIR for Combustion VentilationDetermining if You Have a Confined or Unconfined Space Ventilation AIR InstallationCheck GAS Type Ventilation Air From Inside BuildingInstallation Items InstallationLocating Heater This heater is designed to be mounted on a wallInstalling Heater to Wall 20,000 Btu/Hr Models 30,000 Btu/Hr ModelsAttaching To Wall Stud Method Attaching To Wall Anchor MethodMounting heater to floor With optional floor kit Installing Bottom Mounting ScrewsHeater Wall Mounting Base Feet to HeaterTypical Inlet Pipe Diameters Connecting to GAS SupplyTest Pressures Equal To or Less Than 1/2 Psig 3.5 kPa Checking GAS ConnectionsCorrect all leaks at once Pressure Testing Heater Gas ConnectionsOperating Heater For Your Safety Read Before LightingLighting Instructions Do not try to light any applianceOperating Heater Manual Lighting ProcedureTo Turn OFF GAS To Appliance Thermostat Control OperationPilot Flame Pattern Inspecting HeaterBurner Flame Pattern ODS/PILOT and Burner Cleaning MaintenanceBurner Pilot Air Inlet CabinetObserved Problem Possible Cause Remedy TroubleshootingTroubleshooting Slight smoke or odor during Observe minimum installaBlocked Burner orificeStatement above Gas leak. See WarningService Hints SpecificationsReplacement Parts Technical ServiceModels WMN20A, WMP20A, GWN20TA, GWP20TA, GWN30TA and GWP30TA Illustrated Parts BreakdownNJF 8C Parts ListEquipment Shutoff Valve GA5010 AccessoriesBase Kit GA4550 Electronic ignitor Kit GA435 Not ShownParts Centrals Keep this Warranty Warranty InformationModel Serial No Date of Purchase Industrial Drive P.O. Box 119344-01 Rev. B