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Zehnder Eversky
16.2.3. Pressure switch
In the event of replacement or removal of the component, the air connection must be respected during re-installation as
described in the table below:
The operation of the fresh air and return air fans is controlled by air pressure switches that inform the control unit of the
correct operation of the fans.
These pressure switches are of type NO (Normally Open). At rest, the contact is open. It closes when the differential
pressure exceeds the set value (25 Pa ex works).
In the event of replacement, the setting, the position of the electrical connections and the transparent pressure test
tubes must be observed.
Supply fan
Extraction fan
Pressure switch to control the supply fan:
- P1(+) left free
- Tube in P2(-)
Pressure switch to control the supply fan:
- P1(+) left free
- Tube in P2(-)
