Water System Piping

Piping, fi ttings, and valves should be installed according to the installation drawing (Figure 6). If the indoor installation area is subject to freezing temperatures, the water piping must be properly insulated.

Water supply pressure should not exceed 80% of the working pressure of the water heater. The working pressure is stated on the water heater’s data plate. If this occurs a pressure limiting valve with a bypass may need

Figure 6

Water Piping Installation

 

In a closed system use a

 

thermal expansion tank.

Hot

 

 

Pressure

 

 

Reducing

Water

 

 

 

 

 

 

 

Outlet

Cold Water

Inlet

Union

Cold Water

Inlet Valve

 

to be installed in the cold water supply line. This should be placed on the supply to the entire house in order to maintain equal hot and cold water pressures.

IMPORTANT:

Heat must not be applied to the water fittings on the

heater as they may contain nonmetallic parts. If solder

connections are used, solder the pipe to the adapter

before attaching the adapter to the hot and cold water

fittings.

• Always use a good grade of joint compound and be

certain that all fittings are tight.

1 Inch

Minimum

Drain Pan

2-1/2 Inch Depth Maximum

Temperature And

Pressure Relief Valve

Discharge Line

6 Inches Maximum

Above Drain

Drain Line

3/4 Inch ID

Minimum

Drain Massachusetts: Install a vacuum relief in cold water line per section 19 MGL 142.

Piping Installation

1.Install the water piping and fittings as shown in Figure 6. Connect the cold water supply (3/4” NPT) to the fitting marked “C”. Connect the hot water supply (3/4” NPT) to the fitting marked “H”.

IMPORTANT: Some models may contain energy sav- ing heat traps to prevent the circulation of hot water within the pipes. Do not remove these inserts.

2.The installation of unions in both the hot and cold water supply lines are recommended for ease of removing the water heater for service or replacement.

3.Some local codes may require, and the manufacturer of this water heater recommends, installing a tempering valve or an anti-scald device in the domestic hot water line as shown in Figures 7 and 8. These valves reduce the point-of-use temperature of the hot water by mixing cold and hot water and are readily available. Contact a licensed plumber or the local plumbing authority for more information.

4.If installing the water heater in a closed water system, install an expansion tank in the cold water line as specified under “Closed System/Thermal Expansion.”

5.Install a shut off valve in the cold water inlet line. It should be located close to the water heater and be easily accessible. Know the location of this valve and how to shut off the water to the heater.

6.Install a temperature and pressure relief valve and discharge line in the opening marked “T & P RELIEF VALVE”. Install as specified under “Temperature and Pressure Relief Valve.”

7.After piping has been properly connected to the water heater, open the nearest hot water faucet and allow the tank to completely fill with water. To purge the lines of any excess air and sediment, keep the hot water faucet open for 3 minutes after a constant flow of water is obtained. Close the faucet and check all connections for leaks.

Figure 7

Tempering Valve

Side Water Connections

Follow The Tempering

Hot

Water Out

Valve’s Manufacturer’s

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Installation Instructions

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Tempered

Water

Tempering Valve

Set To 120° F Maximum

Cold Water In

Figure 8

Tempering Valve

Top Water Connections

Follow the tempering

Cold

Water

valve manufacturer’s

Inlet

instructions

 

Hot

Water

Outlet

Tempered

Water To

FixturesTempering Valve (Set To 120° F)

6

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Whirlpool E2F40RD045V, E2F50HD045V, E2F65HD045V, E1F20US015V 120V, E2F40HD045V Water System Piping, Piping Installation

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