7
Water Connections continued-
WARNING
For protection against excessive temperatures and pressure, install
temperature and pressure protective equipment required by local codes,
but not less than a combination temperature and pressure relief valve
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 Shutoff
Devices for Hot Water Supply Systems, ANSI Z21.22
, and the Standard
CAN1-4.4 Temperature, Pressure, Temperature and Pressure Relief
Valves and Vacuum Relief Valves
. The combination temperature and
pressure relief valve shall be marked with a maximum set pressure, not to
exceed the maximum working pressure of the water heater. The
combination temperature and pressure relief valve shall also have an
hourly rated temperature steam BTU discharge capacity not less than the
hourly input rating of the water heater.
Install the combination temperature and pressure relief valve into the
opening on the water heater, which is provided for this purpose.
Note: Some models may already be equipped or supplied with a
combination temperature and pressure relief valves. Verify that this
combination temperature and pressure relief valve complies with local
codes. If the combination temperature and pressure relief valve does not
comply with local codes, replace it with one that does. Follow the
installation instructions provided on this page.
Install a discharge line so that water discharged from the combination
temperature and pressure relief valve will exit within six (6) inches
(15.3
cm)
above, or any distance below the structural floor and at a location
where dischargers cannot contact any live electrical part. This discharge
line is to be installed complete drainage of both the temperature and
pressure relief valve and the discharge line can occur. The discharge
opening must not be subjected to blockage or freezing.
DO NOT
thread,
plug or cap the discharge line. It is recommended that a minimum of four
(4) inches
(10.2 cm)
be provided on the side of the water heater for
servicing and maintenance of the combination temperature and pressure
relief valve.
Do not place a valve between the combination temperature and pressure
relief valve and the tank.
