Table of Contents
Advertisement
Installation (Water Connections) continued-
If this water heater is installed in a closed water supply system, such as the one having
a back-flow preventer in the cold-water supply, provisions shall be made to control
thermal expansion. DO NOT operate this water heater in a closed system without
provisions for controlling thermal expansion. Your water supplier or local plumbing
inspector should be contacted on how to control this situation
After installation of the water lines, open the main water supply valve and fill the water
heater. While the water heater is filling, open several hot water faucets to allow air to
escape from the water system. When a steady stream of water flows through the
faucets, close them and check all water connections for possible leaks.
NEVER OPERATE THE WATER HEATER WITHOUT FIRST BEING CERTAIN IT IS
FILLED WITH WATER.
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 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
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.
WARNING
12
Advertisement
Table of Contents
