Note!
•Before commissioning it is necessary to compare the operating data with the manufacturer’s
indications with regard to their agreement. Moreover, all screw connections must be checked.
•The pumps providing the plate heat exchanger must be equipped with shut-off valves. The
pumps must not suck in air to exclude possible malfunctions caused by strokes of water.
•During the filling of the system, the plate heat exchanger must be ventilated to achieve fully
performance.
•For prolonged deadlock of the system, the heat exchanger must be completely emptied and
cleaned. This holds especially true for danger of frost, aggressive media and media tending to
biological fouling.
•After start up, you must check that there are no pressure pulsations. In case the heat exchanger
is mounted between a control valve and a differential pressure regulator, it must be ensured
that in case of simultaneous closing of the two regulatory entities there is no vacuum pressure.
This is to prevent any steam impacts.
•Generally, it must be ensured that there are no operating conditions being in contradiction to
this assembly, operation, and maintenance manual.
•The formation of ice causes the destruction of the heat exchanger. At temperatures close to
freezing point, it is recommended to use antifreeze agents (e.g., glycol).
•There are many different factors that may influence the fouling and contamination. These are
for example: speed, temperature, turbulences, distribution, and quality of water. As for the use
of media which may be contaminated such as surface waters, cooling circulation water (open
circulation), heating water and the like, it is advisable to install filters on the plate heat exchanger
thus minimizing the danger of contamination.
•The media must be effected with a maximum of mass flow. Low mass flows (partial load) the
turbulence inside the heat exchanger can be affected thus increasing the tendency for contam-
ination.
•With temperatures above 60 ℃ (140 ℉), there can be lime sediments on the surface of the heat
exchanger. A turbulent flow-through and lower temperatures reduce the risk of calcification.
•During the process of shutdown, it must be ensured that first the primary side and thereafter the
secondary side is closed. When starting the system, it is the secondary side first to be opened
and then the secondary one. By this means, overheating of the heat exchanger is excluded.
