The compressed air entering the dryer is led to one of the towers by means of the bottom selector
valve. The position of the selector valve depends on the position (activated or not) of the solenoid
valves. As the air flows upwards through the tower, the desiccant adsorbs the water vapor and the
compressed air is dried.
When it reaches the top of the tower, the dried air leaves the dryer via the check valve.
A small portion of the dried air passes a nozzle, expands to atmospheric pressure and flows
downwards through the other tower, regenerating (drying) the desiccant. The size of the nozzle
depends on the operating pressure. Alternative nozzles for use at other operating pressures are
available. Please consult the spare parts list for ordering information. The regeneration air is
released via the corresponding solenoid valve and a silencer. The solenoid valves are controlled by
the timer.
After a preset time interval, the function of the towers is reversed. The fully regenerated tower will
now dry the air, while the desiccant in the other tower will be regenerated.
When the compressor stops, the drying cycle stops as well: purge air flow stops, both solenoid
valves are closed. When the compressor restarts, the drying cycle will resume where it was
stopped.
Control panel
Reference Description
2 LED <Right tower drying>
3 LED <Left tower drying>
4 LED <Service warning>
5 LED <Service alarm>
6 Air inlet
7 Air outlet
8 Inlet selector valve
9 Outlet selector valve
10 Solenoid valves
11 Service reset
Instruction book
2920 7219 10 23
To Next Page
Loading...
