Desa GWN20T, GWP30T, GWP20T, WMN20, GN30T, GP30 Checking GAS Connections, Natural Gas, Propane/LP

Page 13

INSTALLATION

Continued

IMPORTANT: Hold the pressure regulator with wrench when connecting it to gas piping and/or fittings. Do not over tighten pipe connection to regulator. The regulator body could be damaged.

Pressure

Regulator

 

 

 

Heater

 

 

 

Cabinet

 

3/8" NPT

 

Connection*

Pipe Nipple

 

Bushing to

Shutoff

 

 

 

Ground Joint

 

Tee Joint

Union

 

Reducer

Equipment

Gauge

1/8" NPT

Valve *

1/8" NPT

 

 

 

Test

Plug Tap

3" Min.

Trap

Tee Joint

 

 

 

 

 

 

Sediment

Pipe

(4" W.C. to 10.5" W.C.

 

Nipple

 

 

Natural Gas

 

 

Cap

 

 

From Gas Meter

Pressure)

Propane/LP

From External Regulator

(11" W.C. to 14" W.C. Pressure)

Figure 15 - Gas Connection

*A CSA design-certified equipment shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Purchase the optional CSA design-certified equipment shutoff valve from your dealer. See Accessories, page 30.

CHECKING GAS CONNECTIONS

WARNING: Test all gas pip- ing and connections, internal and external to unit, for leaks after installing or servicing. Cor- rect all leaks at once.

WARNING: Never use an open flame to check for a leak. Apply a noncorrosive leak de- tection fluid to all joints. Bubbles forming show a leak. Correct all leaks at once.

CAUTION: For propane/LP gas, make sure external regula- tor has been installed between propane/LP supply and heater. See guidelines under Connect- ing to Gas Supply, page 12.

Pressure Testing Gas Supply Piping System

Test Pressures In Excess Of 1/2 PSIG (3.5 kPa)

1.Disconnect appliance with its appliance main gas valve (control valve) and equipment shutoff valve from gas supply piping system. Pressures in excess of 1/2 psig will damage heater regulator.

2.Cap off open end of gas pipe where equip- ment shutoff valve was connected.

3.Pressurize supply piping system by either opening propane/LP supply tank valve for propane/LP gas or opening main gas valve lo- cated on or near gas meter for natural gas, or using compressed air.

4.Check all joints of gas supply piping system. Apply a noncorrosive leak detection fluid to all joints. Bubbles forming show a leak.

5.Correct all leaks at once.

6.Reconnect heater and equipment shutoff valve to gas supply. Check reconnected fit- tings for leaks.

Test Pressures Equal To or Less Than 1/2 PSIG (3.5 kPa)

1. Close equipment shutoff valve (see Figure 16).

Equipment

Open

 

Shutoff Valve

 

 

Closed

Figure 16 - Equipment Shutoff Valve

107884-01H

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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 Attaching To Wall Anchor Method 20,000 Btu/Hr ModelsPlacing 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 SupplyNatural Gas Checking GAS ConnectionsPropane/LP Open equipment shutoff valve see , Pressure Testing Heater Gas ConnectionsOperating Heater Manual Control Models For Your Safety Read Before LightingLighting Instructions To Turn OFF GAS To Appliance Manual Lighting ProcedureShutting Off Heater Shutting Off Burner Only pilot stays litThermostat Control Operation Pilot Flame Pattern Inpecting HeaterBurner 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 WarningGN30, GN30T WMN20, GWN20 SpecificationsGP30, 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 Keep this Warranty Warranty InformationLimited 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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