Reference Description
A Air inlet
B Air outlet
1 Compressor
2 Hot gas valve (on F18-400)
3 High pressure switch (on F45-400)
4 Air condenser
5 Fan motor
6 Filter dryer
7 Expansion valve (on F6-11)
Expansion capillary (on F18-400)
8 Evaporator
9 Liquid separator (on F200-400)
10 Air-air exchanger
11 Separator
12 Drain valve
13 Digital controller
Description
Compressed air enters heat exchanger (10) 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 (10 and
8) 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 (11) where all the condensate is separated from the air. The condensate is automatically
drained in the condensate drain.
The cold, dried air flows through heat exchanger (10) where it is warmed up by the incoming air to
approximately 10˚C (18˚F) below the incoming air temperature.
Condensation in the air net cannot occur unless the air is cooled to below the pressure dewpoint,
indicated by the digital controller (13).
2.3 Refrigerant system
Refrigerant flow diagram
Instruction book
2920 7210 40 13
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