Reference Description
F Dry compressed air (Workplace Full-Feature)
Air flow
Air comes in through filter (AF) and inlet valve (IV) and is compressed in the compressor element
(E).
A mixture of compressed air and oil flows into the air receiver/oil separator (AR), where oil and air
are separated.
The air flows through the minimum pressure valve (Vp), the air cooler (Ca) and the condensate
trap (MT) to the outlet valve (AV).
Minimum pressure valve (Vp) prevents the receiver pressure from dropping below a minimum
pressure and includes a check valve which prevents blow-back of compressed air from the net.
Workplace Full-Feature compressors have a dryer (DR) after the air cooler.
Oil circuit
The air receiver (AR) removes most of the oil from the air/oil mixture by centrifugal action. The oil
collects in the lower part of the air receiver (AR) which serves as oil tank.
The oil separator (OS) removes the remaining oil.
The oil circuit has a thermostatic bypass valve (BV) that prevents that the oil flows through the oil
cooler (Co) when the oil temperature is low.
Air pressure forces the oil from air receiver (AR) through the oil filter (OF).
The filtered oil flows through the cooling channels of the interior permanent magnet (IPM) motor
to the compressor element (E).
Cooling on air-cooled compressors
The cooling system has an air cooler (Ca) and an oil cooler (Co) (see Flow diagram).
The fan (FN) blows air over the coolers. This fan is set on and off, depending on the operating
conditions, according to a specific algorithm.
2.3 Condensate system
Drain connections
The compressors have an electronic water drain (ED).
Instruction book
18 2920 7110 05
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