Bedienungsanleitung Eccotemp 20HI (Seite 15 von 56) (Englisch)

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PLEASE NOTE: 20H IS FOR OUTDOOR PERMANENT INSTALLATIONS ONLY AND 20HI IS FOR INDOOR PERMANENT INSTALLATIONS ONLY. THIS MANUAL

AND ALL ECCOTEMP CONTENT IS SUBJECT TO CHANGE WITHOUT NOTICE. PLEASE VISIT WWW.ECCOTEMP.COM/SUPPORT FOR MORE INFORMATION.

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Relief Valve

• The pressure rating of the relief valve must not exceed

150 psi, the maximum working pressure of the water

heater as marked on the rating plate.

• The BTUH rating of the relief valve must equal or exceed

the BTUH input of the water heater as marked on its

rating plate.

• No valve of any type should be installed between the

relief valve and the water heater.

• Discharge from the relief valve should be piped to a

suitable drain to eliminate potential water damage. Piping

used should be of a type approved for the distribution of

hot water.

• Hot and cold water lines should be insulated up to the

water heater.

• The discharge line must be NO SMALLER than the outlet

of the valve and must pitch downward to allow complete

drainage (by gravity) of the relief valve and discharge line.

• The end of the discharge line should not be threaded or

concealed and should be protected from freezing. No

valve of any type, restriction or reducer coupling should

be installed in discharge line.

NOTICE: Local codes govern the installation of relief valves. If local codes require that a temperature

and pressure relief valve should be installed the manufacturer recommends a type 40XL Watts T&P

relief valve or an equivalent model be used.

NOTICE: Manual operation of relief valves should be performed at least once a year. Turn o the

electrical power and gas shuto valve. Lift and release lever on the relief valve and check the manual

operation of the relief valve. You should take precaution to avoid contact with the hot water coming

out of the relief valve and to prevent water damage.

NOTICE: If the relief valve on the system discharges periodically, this may be due to thermal expansion

in a closed water supply system. Contact the water supplier or local plumbing inspector on how to

correct this situation. Do not plug the relief valve.

A new pressure relief valve, complying with the Standard for relief Valves and Automatic Gas Shut-O

Devices for Hot Water Supply Systems, ANSI Z21.22, must be installed at the hot water outlet connection of

the water heater at the time of installation. Local codes shall govern the installation of relief valves.

For safe operation of the water heater, be sure that:

NOTICE: The above illustrates

a pressure only relief valve.

If local codes require a

combination of temperature

and pressure relief, a valve can

be installed, but an extension

piece may be needed.

Pressure Testing the Gas Supply System

WARNING: Install a gas pressure regulator, in the gas supply line, which does not exceed the

maximum supply pressure.

DO NOT use an industrial type gas regulator.

Failure to isolate heater during pressure test can damage internal components voiding warranty. The water heater

and its individual shuto valve must be disconnected from the gas supply piping system during any pressure

testing of that system at testy pressures in excess of 1/2 psi. The water heater must be isolated from the gas

piping system by closing the manual gas shut-o valve during any pressure testing of the gas supply piping at test

pressures equal to or less than 1/2 psi (14’w.c.).

20H Installation

Pressure

Relief Valve

Discharge Line

(To Suitable Drain)

Hot Water

Supply

Outlet

Cold Water

Supply Line

Shut-o Valve

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Eccotemp 20HI Seite 15

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