Typical Installation
Recommended
heat trap
6
″
minimum
Hot water outlet
to fixtures
6
″
air gap
Suitable open drain
6
″
Union
Temperature &
pressure relief
valve
Cold water supply
To cold water
supply
Shut-off valve
Relief
valve
discharge
line to
suitable
open
drain
Unions
*The drain valve is located below and to the right of jacket access panel and is
not visible in this view.
Anode
Jacket
access
panel
Power supply
cord 2
1
/
2
gal.
models only
Temperature &
pressure relief
valve
Opening
for 1/2
″
or 3/4
″
electrical
fitting
(use only copper
conductors)
Auxiliary catch pan
Relief
valve
discharge
line
Shut-off valve
Drain valve*
Jacket access
panel
Hot water
outlet
(to fixtures)
Auxiliary
catch pan
Auxiliary catch
pan drain line
Auxiliary catch pan drain
line
Suitable open drain
7
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.
Drain valve
(not supplied)
To Fill the Water Heater
WARNING: The tank must be full of
water before heater is turned on. The water
heater warranty does not cover damage or
failure resulting from operation with an
empty or partially empty tank.
Make certain the drain valve is completely
closed.
Open the shut-off valve in the cold water
supply line.
Open each hot water faucet slowly to
allow the air to vent from the water heater
and piping.
A steady flow of water from the hot water
faucet(s) indicates a full water heater.
