KaCool D HC
Assembly, installation and operating instructions
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6.5.5 Differential pressure switch
Differential pressure switch
Two differential pressure switches are factory-fitted on the unit. They are used to evaluate the condition of the intake and
discharge filter. Before commissioning, set the required final pressure differences according to the table below.
When the differential pressure is reached:
1 – 3 open
1 – 2 closed
Commissioning
Open the cover.
Turn the selector dial and select the required switching point as per the “Filter pressure loss” table.
Close the cover again.
Filter type
Starting pressure difference [Pa]
Final pressure difference [Pa]
epM1>55 % / formerly F7
15
38
ePM1>85% / formerly F9
20
50
H14 Hepa
65
104
Tab. 5: Filter pressure losses
The final pressure differences listed apply to an operating voltage of 10 V. If the unit is to be operated at maximum fan speed
below 10 V, then lower final pressure differences need to be set on the differential pressure sensor, as otherwise a filter
warning alert will be displayed too late.
