Cooling circuit and coolant properties
13.2 Coolant requirements
Booksize Power Units
Manual, (GH2), 07/2016, 6SL3097-4AC00-0BP8
779
System pressure (with respect to the atmosphere)
Test pressure (with respect to the atmosphere) kPa 1200
Minimum differential pressure p1
Nominal differential pressure p
n
kPa 100
Maximum differential pressure p2
Max. Grain size of any entrained parts
Damage to the component through condensation
Condensation on the components can result in their failure.
• Appropriately control the cooling water temperature.
Cooling circuit damage caused by seawater
The heat sink material is damaged by seawater.
• Do not use seawater as coolant.
Note
As a general rule, tap water is not suitable for use in the cooling circuit,
although it can be mixed with de
-ionized water. Losses must always be replenished with de-
Note
The flow created when the heat sinks are filled results in automatic ventilation, so there is no
need for the devices to be ventilated separately.
The coolant should be checked 3 months after the cooling circuit is filled for the first time
and, subsequently, once a year. If the cooling water becomes cloudy, is colored, or becomes
contaminated by mould spores, the cooling circuit must be cleaned and refilled.
An inspection glass should be provided in the cooling circuit to make it easier to check the
cooling water.
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