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Appendix D – Installing the OTT FAD 4PF humidity absorbing system
The OTT FAD 4PF humidity absorbing system dries the surrounding air that enters
the pressure compensation capillary.
䡵 Mount the humidity absorbing system at the driest position possible (e.g. with
double-sided tape). If this is in a control cabinet, it is important that there is a
pressure compensation possibility to the outside (no hermetically sealed closure!).
䡵 Insert the pressure compensation capillary at least 5 cm into the PVC tube of
the humidity absorbing system as shown in Figure 16.
䡵 Please note the instruction leaflet enclosed with the OTT FAD 4PF for regen -
erating the desiccant cartridge.
Fig. 16: Installing the OTT FAD 4PF
humidity absorbing system.
Pressure probe cable
Pressure compensation capillary
Humidity absorbing system OTT FAD 4PF
Dessicant cartridge
PVC tube
(Ø 4/2 mm)