5 Operation
5.1 Start-up
During the start-up, check that there are no visible leakages from the plate pack, valves or piping
system.
CAUTION
Before pressurizing the heat exchanger, it is important to ensure that the temperature of the heat
exchanger is within the temperature range as stated in the PHE drawing.
CAUTION
If the temperature of the heat exchanger is below the minimum temperature for the gaskets prior
to the service, it is recommended to heat the heat exchanger above this limit to avoid cold
leakage.
NOTE
If several pumps are included in the system, make sure you know which one should be activated
first.
Centrifugal pumps must be started with valves closed and the valves must be operated as smoothly
as possible.
Do not run pumps temporarily empty on the suction side.
NOTE
Adjustments of flow rates should be made slowly in order to avoid the risk of pressure surge
(water hammer).
Water hammer is a short lasting pressure peak that can appear during the start-up or shut-down
of a system, causing liquids to travel along a pipe as a wave at the speed of sound. This can
cause considerable damage to the equipment.
1
Before start-up, check that all the tightening
bolts are firmly tightened and that the
dimension A is correct. Refer to the PHE
drawing.
200000547-4-EN-GB 27
EN
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