Bradford White D-4-504S6FSX - Manual (Page 15)

15
Installation (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 of the Standard for Relief Valves and Automatic Gas Shutoff
Devices for Hot Water Supply Systems, ANSI Z21.22 or the Standard
CAN1-4.4. Temperature and Pressure and the Standard CAN1-4.4,
Temperature, Pressure, Temperature and Pressure Relief Valves and
Vacuum Relief Valves. The combination temperature and pressure relief
valve must 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 must also have an hourly rated
temperature steam BTU discharge capacity not less than the hourly rating of
the water heater.
Install the combination temperature and pressure relief valve into the
opening provided and marked for this purpose on the water heater.
Note: Some models may already be equipped or supplied with a
combination temperature and pressure relief valve. Verify that the
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 above on this page.
Install a discharge line, so that water discharged from the combination
temperature and pressure relief valve will exit within 6 in. (15.2 cm) above,
or any distance below the structural floor and cannot contact any live
electrical part. The discharge line is to be installed to allow for complete
drainage of both the combination temperature and pressure relief valve and
the discharge line. 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 clearance of 4 in. (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.