Desa GWP30T, GWP20T, GWN20T, WMN20, GN30T Troubleshooting, Observed Problem Possible Cause Remedy

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TROUBLESHOOTING

WARNING: Turn off and unplug heater and let cool before servic- ing. 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 POSSIBLE CAUSE

REMEDY

When ignitor button is pressed, there is no spark at ODS/pilot

1.Ignitor electrode positioned wrong

2.Ignitor electrode broken

3.Ignitor electrode not con- nected to ignitor cable

4.Ignitor cable pinched or wet

5.Broken ignitor cable

6.Bad piezo ignitor

1.Replace pilot assembly

2.Replace pilot assembly

3.Reconnect ignitor cable

4.Free ignitor cable if pinched by any metal or tubing. Keep ignitor cable dry

5.Replace ignitor cable

6.Replace piezo ignitor

When ignitor button is pressed, there is spark at ODS/pilot but no ignition

1.Gas supply turned off or equip- ment shutoff valve closed

2.Control knob not in PILOT position

3.Control knob not pressed in while in PILOT position

4.Air in gas lines when installed

5.Depleted gas supply (pro- pane/LP gas only)

6.ODS/pilot is clogged

7.Gas regulator setting is not correct

1.Turn on gas supply or open equipment shutoff valve

2.Turn control knob to PILOT position

3.Press in control knob while in PILOT position

4.Continue holding down con- trol knob. Repeat igniting op- eration until air is removed

5.Contact local propane/LP gas company

6.Clean ODS/pilot (see Cleaning and Maintenance, page 19) or replace ODS/pilot assembly

7.Replace gas regulator

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Contents What to do if YOU Smell GAS Table of Contents Safety Information Product Features Local CodesProduct Identification UnpackingAIR for Combustion Ventilation Providing Adequate VentilationUnusually Tight Construction Confined and Unconfined SpaceDetermining FRESH-AIR Flow for Heater Location Determining if You Have a Confined or Unconfined SpaceInstallation Ventilation AIRCheck GAS Type Ventilation Air From Inside BuildingInstallation Items Locating HeaterInstalling Heater to Wall Placing Heater On Mounting Bracket 20,000 Btu/Hr ModelsAttaching To Wall Anchor Method Installing Bottom Mounting Screws Mounting Base Feet to Floor Where required by local codeMounting Heater to Floor with Optional Floor KIT Mounting Base Feet to HeaterConnecting to GAS Supply Typical Inlet Pipe DiametersPropane/LP Checking GAS ConnectionsNatural Gas Pressure Testing Heater Gas Connections Open equipment shutoff valve see ,Lighting Instructions Manual Control Models For Your Safety Read Before LightingOperating Heater Manual Lighting Procedure To Turn OFF GAS To ApplianceShutting Off Heater Shutting Off Burner Only pilot stays litThermostat Control Operation Burner Flame Pattern Inpecting HeaterPilot Flame Pattern Cleaning Maintenance ODS/PILOT and BurnerBurner Pilot AIR Inlet CabinetTroubleshooting Observed Problem Possible Cause RemedyReplace burner orifice See Cleaning and Mainte Gas leak. See Warning Statement aboveGP30, GP30T SpecificationsGN30, GN30T WMN20, GWN20 Service Hints Technical ServiceService Publications Replacement Parts Parts Under WarrantyIllustrated Parts Breakdown Parts List NJF 8CGWN20T, GWP20T GWN30T, GWP30T Parts List Accessories Equipment Shutoff Valve GA5010FAN Kits GA3250T Base KIT GA4550Parts Centrals Limited Warranty VENT-FREE Residential GAS Heaters Warranty InformationKeep this Warranty

GP30, GWN20T, GWN30T, GWN20, GWP20 specifications

Desa GWP20, GWP30T, GP30T, GN30T, and GP30 are advanced water heater models that stand out in the market for their efficiency, innovative technology, and user-friendly features. Each model is designed to cater to different consumer needs, offering reliable hot water solutions for residential and commercial applications.

The Desa GWP20 is a compact and efficient water heater that operates on a 20-gallon tank. Ideal for smaller households, it boasts fast heating capabilities and a durable construction that ensures longevity. Its user-friendly control panel allows for easy temperature adjustments, and its energy-saving mode helps reduce utility costs.

Moving up in capacity, the GWP30T features a 30-gallon tank, making it suitable for medium-sized households. This model incorporates a high-efficiency burner that maximizes heat output while minimizing gas consumption. With an upgraded insulation system, the GWP30T retains heat for longer periods, enhancing energy efficiency. The built-in diagnostics monitor performance, ensuring consistent operation and alerting users to any potential issues.

The GP30T is another 30-gallon model that emphasizes flexible installation options. It can be configured for various venting systems, making it adaptable for different home layouts. Its robust safety features, such as an automatic shut-off system, provide peace of mind for users. Additionally, the GP30T is equipped with a flame sensor for improved safety during operation.

For those seeking an efficient gas-powered unit, the GN30T delivers exceptional performance with a 30-gallon capacity. This model is designed to withstand the demands of larger households, featuring rapid recovery rates to provide a continuous supply of hot water. It utilizes advanced combustion technology that ensures efficient gas usage, striking the perfect balance between performance and energy costs.

Finally, the GP30 is a versatile water heater designed to meet diverse consumer needs. With a focus on sustainability, this model incorporates eco-friendly materials and technologies. The GP30 is packed with features that enhance its usability, such as customizable temperature settings, easy-to-read indicators, and a straightforward installation process.

In summary, Desa's GWP20, GWP30T, GP30T, GN30T, and GP30 water heaters are engineered for efficiency and reliability. Each model offers unique features tailored to specific user needs, from compact designs for smaller spaces to powerful systems for larger families. With an emphasis on modern technology and safety, Desa continues to be a leader in the water heating market.
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