Regulating system and protection
The compressor is started and stopped automatically by a pressure switch (PS). A pressure gauge (PI)
indicates the pressure. A temperature switch (TSHH) protects the compressor element from too high
temperatures.
A safety valve (108) protects the compressor element against too high pressure.
2.3 Refrigerant dryer
Operation
The refrigerant dryer removes moisture from the compressed air by cooling it down to near freezing
temperature. The water is removed via an automatic drain.
Compressed air circuit
Compressed air enters heat exchanger (1) and is cooled by the outgoing, cold, dried air. Water in the
incoming air starts to condense. The air then flows through the evaporator heat exchanger (2) where the
refrigerant evaporates, causing the compressed air to be cooled further to close to the evaporating
temperature of the refrigerant. More water in the air condenses. The cold air then flows through water
separator (3), where the condensate is separated from the air. The condensate is automatically drained by
the electronic condensate drain (9).
The cold, dried air flows through heat exchanger (1) where it is warmed up by the incoming air.
Instruction book
16 2920 7110 11
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