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9
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 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 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
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 six (6) inches (15.3 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 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 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.
INTERNET VERSION FOR REFERENCE ONLY