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Eccotemp 20HI Manual

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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.
Phone: 866-356-1992 | Email: Support@eccotemp.com | Address: 315 - A Industrial RD Summerville, SC 29483
English
Support: Eccotemp.com/help-desk Shop Online: Eccotemp.com/products Store Locator: Eccotemp.com/locator
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
… 15 …


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