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5
Instruction book
1. The control pressure present in the chambers of loading
plunger (22) and unloading valve (4) is vented to atmosphere
via solenoid valve (Y1).
2. Loading plunger (22) moves upwards and causes inlet valve
(6) to close the air inlet opening.
3. Unloading valve (4) is opened by receiver pressure. The
pressure from air receiver (15) is released towards unloader
(3).
Air output is stopped (0 %), the compressor runs unloaded.
1.2.2 Loading (Fig. 1.7)
When the net pressure decreases to the loading pressure,
solenoid valve (Y1) is energized. The plunger of solenoid valve
(Y1) moves upwards against spring force:
1. Control pressure is fed from air receiver (15) via solenoid
valve (Y1) to loading plunger (22) and unloading valve (4).
2. Unloading valve (4) closes the air blow-off opening.
Loading plunger (22) moves downwards and causes inlet
valve (6) to open fully.
Air output is resumed (100 %), the compressor runs loaded.
ER I Elektronikon I regulator
1 Air outlet
2 Air filter
3 Drive motor
4 Air receiver/oil separator
5 Oil cooler
6 Oil cooler vent plug
7 Air cooler
Fig. 1.4 GA22 Pack
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