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Installing the SHLX
RELIEF VALVE
A new pressure relief valve, complying with the standard for relief valves and automatic gas
shut off 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:
•
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: The diagram below illustrates a pressure only relief valve. If local codes require
a combination temperature and pressure relief valve be installed, an extension piece may be
needed.
Pressure Relief Valve
(Supplied)
Discharge Line
(To Suitable Drain)
LEAK TESTING
WARNING:Never use an open flame to test for gas leaks, as property damage, personal injury, or death
could result.
The water heater and its gas connections must be leak tested at normal operating pressures before it is placed in
operation.
•
Turn on the gas shut off valve(s) to the water heater.
•
Use a commercial leak detector or soapy water solution to test for leaks at all connections and fittings. Bubbles
indicate a gas leak that must be corrected. All connections should also be leak tested after the water heater is
placed in operation.
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.
The water heater must be isolated from the gas piping system by closing the manual gas shut off valve during any
pressure testing of the gas supply piping at pressures equal to or less than 1/2 psi (14'w.c.).
HIGH ALTITUDE
The Eccotemp SHLX SMARTHOME Gas Tankless Water Heater has been tested for use at elevations up to 2000 ft.
Installation and use of the Eccotemp SHLX above 2000 ft. may effect overall efficiency and performance. Please
consult with a gas technician for pressure adjustments at your homes regulator.
18
Support: Support.Eccotemp.com
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.
performed at least once a year. Turn off the electrical power and
gas shut off 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.
Cold Water Supply
Line Shut-Off Valve
this may be due to thermal expansion in a closed water supply
system. Contact the water supplier or local plumbing inspector on
Hot Water Supply Outlet
how to correct this situation. Do not plug the relief valve.
PLEASE NOTE: SHLX IS FOR INDOOR PERMANENT INSTALLATIONS ONLY. THIS MANUAL AND ALL ECCOTEMP CONTENT IS SUBJECT TO
CHANGE WITHOUT NOTICE. PLEASE VISIT SUPPORT.ECCOTEMP.COM FOR MORE INFORMATION.
NOTICE: Local codes govern the installation of relief valves. If
NOTICE: Manual operation of relief valves should be
NOTICE: If the relief valve on the system discharges periodically,
Shop Online: www.Eccotemp.com
Phone: 866-356-1992
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