Desa GWN30TA, GWP20TA, GWP30TA, GWN20TA, WMP20A, WMN20A Table of Contents, Safety Information

Page 2

Table of Contents

Safety Information

2

Troubleshooting

19

Local Codes

4

Specifications

23

Product Identification

4

Service Hints

23

Unpacking

4

Replacement Parts

23

Product Features

4

Technical Service

23

Air For Combustion And Ventilation

5

Service Publications

23

Installation

7

Illustrated Parts Breakdown and Parts List

24

Operating Heater

15

Accessories

26

Inspecting Heater

17

Parts Centrals

27

Cleaning and Maintenance

18

Warranty Information

Back Cover

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 a qualified installer, service agency or the gas supplier.

WARNING: This is an unvented gas-fired heater. Itusesair(oxygen)fromthe roominwhichitisinstalled. Provisions for adequate combustion and ventila- tion air must be provided. Referto Air for Combustion and Ventilation section on page 5 of this manual.

This appliance is only for use with the type of gas indicated on the rating plate. This appliance is not convertible for use with other gases.

This appliance may be in- stalled in an aftermarket,* permanently located, manufactured (mobile) home, where not prohib- ited by local codes.

*Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer

WARNING:Thisproductcon- tainsand/orgenerateschemicals known to the State of California to cause cancer or birth defects or other reproductive harm.

IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, operate or service this heater. Improper use of this heater can cause serious injury or death from burns, fire, explosion, electrical shock and carbon monoxide poisoning.

DANGER: Carbon monoxide poisoning may lead to death!

Carbon Monoxide Poisoning: Early signs of car- bon monoxide poisoning resemble the flu, with headaches, dizziness or nausea. If you have these signs, the heater may not be working properly. Get fresh air at once! Have heater serviced. Some people are more affected by carbon monoxide than others. These include pregnant women, people with heart or lung disease or anemia, those under the influence of alcohol and those at high altitudes.



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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 SpaceDetermining if You Have a Confined or Unconfined Space AIR for Combustion VentilationDetermining FRESH-AIR Flow for Heater Location 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 OperationBurner Flame Pattern Inspecting HeaterPilot 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
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