Bradford White RE2H50S 1NCTT Series Installation/Operation Instruction Manual page 16

Water Supply Connections cont.-
Typical Installation
Temperature and Pressure Relief Valve
The pressure rating of the relief valve must not exceed 150 PSI (1.03 kPa) or the maximum working
pressure of the water heater as marked on the rating plate.
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 remain
installed in the opening provided and marked for this purpose on the water heater. NO valves of any type
should be installed between the relief valve and the tank. Local codes shall govern the installation of relief
valves. 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 water 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.
Conduit to electrical
junction box (use only
copper conductors)
Hot water
outlet to
fixtures
Union
(suggested)
Drain valve
To open drain, line
should be at least 3/4" ID and
pitched for proper draining
Thermal
expansion tank
Shut-off valve
¾" FNPT fitting to
condensate drain
pan
Temperature &
pressure relief valve
Condensate drain line
Relief valve discharge
6" (15.2 cm) minimum
from the floor
WARNING
To cold
water
supply
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