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Make sure that the secondary fluid continues to flow inside the
exchanger even after turning off the exchanger and while the pressure of
the coolant is high enough to prevent freezing of the secondary fluid.
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When the machinery is started, the temperature corresponding to the
pressure of the coolant inside the exchanger must not be lower than the
freezing point of the secondary fluid.
o
When the machinery is stopped, the temperature corresponding to the
pressure of the coolant inside the exchanger must not be lower than the
freezing point of the secondary fluid.
o
To prevent freezing phenomena with damage to the exchanger, do not pump-
down the evaporator after turning it off: in other words, avoid using the compressor
to achieve the set coolant pressure.
o
Do not expose the exchanger to strong, sudden variation in pressure.
o
During the shutdown phase of the exchanger, once the compressor has
stopped, maintain the functioning of the pump for at least 5 minutes to prevent any
freezing occurrence.
o
During the start-up phase, switch on the pump at least one minute before
starting up the compressor to prevent any freezing occurrence.
DO NOT OPEN THE EXCHANGER WHEN IT IS UNDER PRESSURE.
WATER CIRCUIT CLEANING:
In case of particularly hard water with a tendency to form deposits, it is possible to clean the
exchanger through CIP (Cleaning In Place). There may be a decrease in performance due
to the presence of deposits inside the exchanger. In such cases, force-wash using a
suitable descaling chemical solution, after checking the compatibility with the construction
materials of the exchanger.
7. MAINTENANCE AND USER CHECKS
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