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Instruction book
Oil stop valve (Vs) prevents compressor element (E) from
flooding with oil when the compressor is stopped.
Valve (BV) by-passes oil cooler(s) (Co) when starting the
compressor from cold condition to ensure rapid warming of
the oil to normal working temperature.
GA/GA W 200 up to -315
Air pressure forces the oil from receiver (AR) through oil
cooler(s) (Co), filters (OF) and valves (Vs1 and Vs2) to
compressor elements (E1 and E2) and the lubrication points.
Oil stop valves (Vs1 and Vs2) prevent compressor elements
(E1 and E2) from flooding with oil when the compressor is
stopped.
Valves (BV) by-pass oil cooler(s) (Co) when starting the
compressor from cold condition to ensure rapid warming of
the oil to normal working temperature.
All GA/GA W
In receiver (AR) most of the oil is removed from the air
centrifugally. Almost all of the remaining oil is removed by
separator element (OS).
1.3.4 Cooling system
The system includes air cooler (Ca) and oil cooler (Co) (GA
W 132 up to -315 have two oil coolers).
On GA, the coolers are cooled by fans (FN2/3) (GA90 and -
110 are provided with one fan). GA W are provided with a
cooling water system.
Fig. 5a GA90 up to -160 during unloading (7.5-10 bar/100-125-150 psi)
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