Product Manual

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.
Refrigerant circuit
Compressor (4) delivers hot, high-pressure refrigerant gas which flows through condenser (6) where most
of the refrigerant condenses.
Next, the liquid refrigerant flows through 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 again by the
compressor.
The condenser (6) pressure must be kept as constant as possible to obtain stable operation. Fan control
switch (P) therefore stops and starts the condenser cooling fan. If, under partial or no load, the evaporator
(2) pressure drops to approximately 2.25 bar(e) (32.63 psig), the hot gas bypass valve (5) opens and hot,
high-pressure gas is fed to the evaporator circuit to prevent the evaporator pressure from dropping any
further.
Instruction book
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