Use And Care Manual

7
Typical Installation
WARNING: 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.
Relief Valve
The Btuh rating of the relief valve must
not be less than the input rating of the
water heater as indicated on the rating
label located on the front of the heater
(1 watt=3.412 Btuh).
Connect the outlet of the relief valve to a
suitable open drain so that the discharge
water cannot contact live electrical parts or
persons and to eliminate potential water
damage.
Piping used should be of a type approved
for hot water distribution. The discharge
line must be no smaller than the outlet of
the valve and must pitch downward from
the valve 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 the discharge line.
A new combination temperature and pressure relief valve, complying with the Standard for Relief
Valves and Automatic Gas Shut-Off Devices for Hot Water Supply Systems, ANSI Z21.22, is
supplied and must be installed in the opening provided and marked for the purpose on the water
heater. No valve of any type should be installed between the relief valve and the tank. Local codes
shall govern the installation of relief valves.
(Pictured from rear of heater
with Top Panel and Insula-
tion Pad removed).
Hot Water
Outlet to Fixtures
To Electrical Distribution
Panel
(Use only Copper Conductors)
Shut-Off Valve in
Cold Water
Supply Line
Temperature & Pressure
Relief Valve
Wiring Junction
Bracket
Grounding Screw
To Electrical
Distribution Panel
Flexible Connectors for
Water Connections at
Tank Fittings
To Cold Water
Supply
Relief Valve Discharge
Line to suitable open
drain
Anode