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Zehnder Eversky
16.2. DEPS and DEPR fan runback pressure switches
The operation of the supply and extractor fans is continuously monitored by two air
pressure switches which inform the controller whether or not there is sufficient air
pressure.
16.2.1. Setting the tare
The nominal setting of the fan runback pressure switches is 25 Pa. There is no need
to change the factory setting. This setting must be respected when replacing a
component that can be delivered with a different setting.
The adjustment is made simply with a flat-head screwdriver by turning the central
element (1) so that the arrow (2) is aligned with the setpoint value.
16.2.2. Electrical connections
The pressure switches are of type NO (Normally Open). The contact closes when
the differential pressure generated by the air flow exceeds the pressure switch
setting (25 Pa ex works).
The pressure switches must be connected between terminals (1) and (3) according
to the electrical wiring diagram.
