13
Water Supply Connections
Note: BEFORE PROCEEDING WITH THE INSTALLATION, CLOSE THE MAIN WATER SUPPLY VALVE.
After shutting the main water supply valve, open a faucet to relieve the water line pressure to prevent any
water from leaking out of pipes while making the water connections to the water heater. After the pressure has
been relieved, close the faucet. Refer to the typical installation illustration below for suggested set-up. The
HOT and COLD water connections are clearly marked and are ¾” NPT on all models. When connecting to the
inlet/o
utlet ports, the use of ¾” female NPT tapered thread fittings with use of thread sealant is recommended.
The installation of unions is recommended on the hot and cold water connections so that the water heater may
be easily disconnected for servicing if necessary.
Note
: Install a shut-off valve in the cold water line near the water heater. This will enable easier service or
maintenance of the unit later.
CAUTION
Do NOT apply heat to the HOT or COLD water connections. If sweat connections are used, sweat
tubing to adapter before fitting the adapter
to the cold water connections on heater. Any heat applied
to the hot or cold water connection will permanently damage the internal plastic lining in these ports.
IMPORTANT!
Failure to install and maintain a new, listed 3/4
” x 3/4” temperature-pressure relief valve will release the
manufacturer from any claim which might result from excessive temperature and pressures.
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 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.
CAUTION
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. 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 relief valve into the opening provided and marked for this purpose in 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 is in compliance with the 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 (15.3 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 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.
Summary of Contents for RE2H50S 1NCWT Series
Page 28: ...28 Notes...
