UGH017/0500
Series 1 Portable Chillers, PLC Control
D
ESCRIPTION
2-7
H
OW IT
W
ORKS
:
A
IR
-
COOLED
CONT
’
D
Refrigerant circulation
The evaporator extracts heat
from the process fluid, caus-
ing the refrigerant to vaporize
(evaporate) into a gas.
1
Cooled refrigerant is metered
back into the exaporator for
the cycle to begin again.
5
Vaporized refrigerant
travels from evapora-
tor to the compressor,
where the low pressure
vapor is compressed into
a high pressure vapor.
2
The liquid refrigerant
leaves the accumulator,
passing through the ther-
mal expansion valve,
where it expands and
cools.
4
The high pressure vapor
travels from the compressor
through the condenser (where
fans cool vapor into a liquid)
and liquid is stored in the
accumulator.
3
