Flooded type water cooled screw chiller (PCB Control)
21
7.
Water flow
Balance the chilled water flow through the evaporator and the condenser water flow through the
condenser. The flow rates must fall between the minimum and maximum values shown in the below
table. Flow rates below the minimum values shown will result in laminar flow which will reduce efficiency,
cause erratic operation of the electronic expansion valve and could cause low temperature cutouts. On
the other hand, flow rates exceeding the maximum values shown can cause erosion on the heat
exchanges water connections and tubes, even piping breaking.
Variable chilled water flow through the heat exchanges while the compressor(s) are operating is not
recommended. The chiller control set points are based upon a constant flow and variable temperature.
Model
Evaporator water flow rate
m
3
/h
Condenser water flow rate
m
3
/h
Rated
Minimum
Maximum
Rated
Minimum
Maximum
MWSC340A-FB3
58
29
64
73
37
80
MWSC440A-FB3
76
38
83
95
47
104
MWSC540A-FB3
93
46
102
116
58
128
MWSC690A-FB3
119
59
131
148
74
163
MWSC805A-FB3
138
69
152
173
87
190
MWSC890A-FB3
153
77
168
191
96
210
MWSC1080A-FB3
186
93
204
232
116
255
MWSC1200A-FB3
206
103
227
258
129
284
MWSC1385A-FB3
238
119
262
298
149
328
MWSC1650A-FB3
279
142
312
348
177
390
MWSC1780A-FB3
306
153
337
383
191
421
Pressure drop
Flooded type (Evaporator)
0
10
20
30
40
50
60
70
0
50
100
150
W
at
e
r
p
re
ssu
re
d
rop
(kP
a)
Water flow (m3/h)
Water pressure drop curve(evaporator)
MWSC340A-FB3
MWSC440A-FB3
MWSC540A-FB3
MWSC690A-FB3
MWSC805A-FB3
MWSC890A-FB3
