172-65702M-04 (SQ-C01) 10 Dec 2020
20
(5) Outlet Piping for Water Safety Valve
Make sure pipe the outlet piping of
the water safety valve to a safe area
such as a pit. Make sure that the end
of the pipe is opened to the
atmosphere and do not install a valve.
Even when the unit is not in operation,
the water safety valve may operate
and hot water may flow out to prevent
the internal pressure from rising.
Failure to follow precautions may
result in burns or other injury from discharge of hot water. Do not use PVC
pipes and lead pipes for water supply as the discharged water may become
very hot. When supply pressure of the cold water exceeds 0.4 MPaG, which is
the maximum operating pressure (PMO), water may flow out.
