Relief Valve - American Standard HPWH50G-AS Owners And Operation Manual

CONDENSATION DRAIN TUBES
This unit has a condensation tray. The water collected in the tray drains out of the tube coming off the back of the
unit. Two flexible hoses are attached to the two drain ports on the back of the unit. Attach one end of the longer 6'
hose to the lower drain port on the back of the unit, underneath the rear cover. Direct the other end to a drain in
the floor, no higher than 3' above the floor. If such a drain is unavailable, a condensate drain pump (not
provided) must be purchased and installed. Attach the shorter 3" hose to the top drain port.
INSTALLATION INSTRUCTIONS
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
to the opening provided and marked for that 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.

RELIEF VALVE

WARNING
CAUTION
CAUTION
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 BTU/h
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 (1watt=3.412
BTU/h). 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.
To reduce the risk of excessive pressures and temperatures in this water heater,
install temperature and pressure protective equipment required by local codes
and no less than a combination temperature and pressure relief value certified by a
nationally recognized testing laboratory that maintains periodic inspection of
production of listed equipment or materials, as meeting the requirements for Relief
Valves and Automatic Gas Shut-Off Devices for Hot Water Supply systems, ANSI
Z21.22. This valve must be marked with a maximum set pressure not to exceed
the marked maximum working pressure of the water heater. Install the valve
into an opening provided and marked for this purpose in the water heater, and
orient it or provide tubing so that any discharge from the valve exits only
within 6 inches above or at any distance below, the structural floors and does
not contact any live electrical part. The discharge opening must not be
blocked or reduced in size under any circumstances.
Electrical connections must be wired properly. 240V AC must be applied to L1 and L2
wires as shown in the illustration on page 18. Failure to do so will VOID the
warranty, and can result in the improper application of 120V AC connected to the
water heater, which may damage the compressor or other electrical components.
3" hose
6" hose
17