5
CAUTION:
A relief valve is designed to discharge excessively hot
water.
THE CUSTOMER IS RESPONSIBLE TO PROTECT
PROPERTY AND PERSONNEL FROM HARM WHEN THE
VALVE FUNCTIONS.
A ¾” NPT brass connection is provided on the topside of the heater for
the field installation of a relief valve (see Figure I).
Care must be taken to be sure that the stem of the pressure and
temperature relief is immersed in the water within the top 6” of the tank.
The drain line must not be concealed or blocked and must be protected
from freezing.
No valve of any kind should be installed between the relief valve and
tank or in the drain line.
E.
WATER SUPPLY CONNECTIONS
All water supply fittings on this heater are brass. Do not over tighten or
strip threads.
The cold water fitting is a combination drain and inlet. It is not a shut off
valve.
Provide a shut off valve in the cold water line. Mark for future
emergency use.
Do not apply heat directly to the cold-water inlet.
The hot water outlet is a threaded connection to the tank. Do not over
tighten.
WARNING: Some local codes mandate the use of a backflow
preventer or check valve or pressure-reducing valve. An adequate
expansion tank (or other adequate means) must be installed to
prevent pressure build up or damage from thermal expansion when
a check valve or backflow preventer or pressure-reducing valve is
used. Failure to do so could result in tank leakage and therefore
void the warranty.
Summary of Contents for Hydrastone ME Series
Page 14: ...13 INSTALLATION DIAGRAM PARTS LOCATION Figure I ...
Page 16: ...15 WIRING DIAGRAMS Table 1 ...
Page 19: ...18 NOTES ...