Desa GWP20T, GWP30T, GWN20T, WMN20, GN30T, GP30T, GWN30T installation manual Replace burner orifice

Page 21

TROUBLESHOOTING

Continued

OBSERVED PROBLEM POSSIBLE CAUSE

REMEDY

ODS/pilot lights but flame goes out when control knob is released

1.Control knob not fully pressed in

2.Control knob not pressed in long enough

3.Safety interlock system has been triggered

4.Equipment shutoff valve not fully open

5.Thermocouple connection loose at control valve

6.Pilot flame not touching ther- mocouple, which allows thermocouple to cool, caus- ing pilot flame to go out. This problem could be caused by one or both of the following:

A)Low gas pressure

B)Dirty or partially clogged ODS/pilot

7.Thermocouple damaged

8.Control valve damaged

1.Press in control knob fully

2.After ODS/pilot lights, keep con- trol knob pressed in 30 seconds

3.Wait one minute for safety in- terlock system to reset. Repeat ignition operation

4.Fully open equipment shutoff valve

5.Hand tighten until snug, then tighten 1/4 turn more

6.A) Contact local natural or propane/LP gas company

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

7.Replace pilot assembly

8.Replace control valve

Burner does not light after ODS/

1. Burner orifice is clogged

1.

Clean burner (see Cleaning

pilot is lit

 

 

 

and Maintenance, page 19) or

 

 

 

 

replace burner orifice

 

2.

Inlet gas pressure is too low

2.

Contact local natural or pro-

 

 

 

 

pane/LP gas company

 

 

 

 

Delayed ignition of burner

1. Manifold pressure is too low

1.

Contact local natural or pro-

 

 

 

 

pane/LP gas company

 

2.

Burner orifice is clogged

2.

Clean burner (see Cleaning

 

 

 

 

and Maintenance, page 19) or

 

 

 

 

replace burner orifice

 

 

 

 

Burner backfiring during com-

1. Burner orifice is clogged or

1.

Clean burner (see Cleaning

bustion

 

damaged

 

and Maintenance, page 19) or

 

 

 

 

replace burner orifice

 

2.

Burner damaged

2.

Replace burner

 

3.

Gas regulator defective

3.

Replace gas regulator

107884-01H

www.desatech.com

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Contents What to do if YOU Smell GAS Table of Contents Safety Information Local Codes Product FeaturesProduct Identification UnpackingProviding Adequate Ventilation AIR for Combustion VentilationUnusually Tight Construction Confined and Unconfined SpaceDetermining if You Have a Confined or Unconfined Space Determining FRESH-AIR Flow for Heater LocationVentilation AIR InstallationCheck GAS Type Ventilation Air From Inside BuildingLocating Heater Installation ItemsInstalling Heater to Wall 20,000 Btu/Hr Models Attaching To Wall Anchor MethodPlacing Heater On Mounting Bracket Mounting Base Feet to Floor Where required by local code Installing Bottom Mounting ScrewsMounting Heater to Floor with Optional Floor KIT Mounting Base Feet to HeaterTypical Inlet Pipe Diameters Connecting to GAS SupplyChecking GAS Connections Natural GasPropane/LP Open equipment shutoff valve see , Pressure Testing Heater Gas ConnectionsManual Control Models For Your Safety Read Before Lighting Operating HeaterLighting Instructions To Turn OFF GAS To Appliance Manual Lighting ProcedureShutting Off Heater Shutting Off Burner Only pilot stays litThermostat Control Operation Inpecting Heater Pilot Flame PatternBurner Flame Pattern ODS/PILOT and Burner Cleaning MaintenanceBurner Pilot AIR Inlet CabinetObserved Problem Possible Cause Remedy TroubleshootingReplace burner orifice See Cleaning and Mainte Statement above Gas leak. See WarningSpecifications GN30, GN30T WMN20, GWN20GP30, GP30T Technical Service Service HintsService Publications Replacement Parts Parts Under WarrantyIllustrated Parts Breakdown NJF 8C Parts ListGWN20T, GWP20T GWN30T, GWP30T Parts List Equipment Shutoff Valve GA5010 AccessoriesFAN Kits GA3250T Base KIT GA4550Parts Centrals Warranty Information Keep this WarrantyLimited Warranty VENT-FREE Residential GAS Heaters

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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