Reference Name
6 Refrigerant condenser
7 Liquid refrigerant dryer/filter
8 Thermostatic expansion valve
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 liquid flows through liquid refrigerant dryer/filter (7) to capillary tube (8). The refrigerant leaves the
capillary tube at evaporating pressure.
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.
Instruction book
24 2920 1634 04
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