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Function of the main components
Y11S
S1PH
S14PH
Y15S
6
8
4
5
S3T
Figure - Functional diagram
1
Evaporator
2
Water out
3
Water in
4
Drier
5
Charge valve
6
Discharge stop valve
7
Stop valve
As the refrigerant circulates through the unit, changes in its state or
condition occur. These changes are caused by the following main
components:
Compressor
The compressor (M*C) acts as a pump and circulates the
refrigerant in the refrigeration circuit. It compresses the refri-
gerant vapour coming from the evaporator at the pressure at
which it can easily be liquefied in the condenser.
Filter / drier
The filter installed behind the condenser removes small particles
from the refrigerant to prevent blockage of the tubes.
The drier takes water out of the system.
Expansion valve
The liquid refrigerant coming from the condenser enters the
evaporator via an expansion valve. The expansion valve brings
the liquid refrigerant to a pressure at which it can easily be
evaporated in the evaporator.
Evaporator
The main function of the evaporator is to take heat from the
water that flows through it. This is done by turning the liquid
refrigerant,
coming
from
refrigerant.
Water in/outlet connection
The water inlet and outlet connection allow an easy connection
of the unit to the water circuit of the air handling unit or industrial
equipment.
EWLD120~540MBYNN
Condenserless water-cooled water chillers
4PW22687-1
A
B
B1P
B3P
10
10
R9T
12
11
M1C
13
(*)
Y16S
7
9
1
EWLD120~260
8
Strainer
9
Sightglass
10
Suction stop valve (option)
11
Electronic expansion valve
12
Expansion valve
13
Flowswitch
14
Filter
the
condenser,
into
C
D
B1P
10
10
12
12
14
R3T
3
4
2
3
R4T
R6T
EWLD340~540
Flowswitch
The flowswitch protects the evaporator of the unit against
freezing when there is no waterflow or when the waterflow is too
low.
Waterfilter
The waterfilter protects the evaporator against clogging.
gaseous
E
B4P
B6P
10
R10T
11
M2C
)
( *
Y26S
A
only for EWLD120~170
B
only for EWLD240~260, EWLD400~540
C
only for EWLD340
D
only for EWLD340~400
E
only for EWLD480~540
(*)
See A~E
Y21S
S2PH
S15PH
S
5
1
Y
S4T
Operation manual
4
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