Reference Name
6 Refrigerant condenser
7 Liquid refrigerant dryer/filter
8 Capillary
9 Hot gas by-pass valve
10 Condenser cooling fan
11 Pressure switch, fan control
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 heat exchanger/evaporator (2), where the refrigerant
evaporates, causing the 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 separator (3) where all the condensate is separated
from the air. The condensate is automatically drained through outlet (4).
The cold, dried air flows through heat exchanger (1) where it is warmed up by the incoming air.
Refrigerant circuit
Compressor (5) delivers hot, high-pressure refrigerant gas which flows through condenser (6) where most of
the refrigerant condenses.
The refrigerant enters evaporator (2) where it withdraws heat from the compressed air by further evaporation
at constant pressure. The heated refrigerant leaves the evaporator and is sucked in by the compressor (5).
By-pass valve (9) regulates the refrigerant flow. Fan (10) is switched on or off by switch (11) depending on
the loading degree of the refrigerant circuit.
The refrigerant compressor motor has a built-in thermic protection. If the motor stops after tripping
of the thermic protection, it may take up to 2 hours for the motor windings to cool down and before
the motor can restart.
Instruction book
2920 7090 51 25
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