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Flooded type water cooled screw chiller (MIC)
MCAC-CTSM-2018-1
78
6) The flow switch must be arranged on the drain pipe of the evaporator. The flow switch must be
interlocked with the input contact in the control cabinet. Its installation requirements are as
follows:
(1) The flow switch must be installed on the pipe vertically.
(2) The straight pipe section on each side of the flow switch must be at least 5 times longer than
the pipe diameter; do not install it near the elbow, orifice plate or valve.
(3) The direction of the arrow on the flow switch must be consistent with the direction of water
flow.
(4) To prevent vibration of the flow switch, remove all air in the water system.
(5) Adjust the flow switch to keep it open state when the flow is lower than the minimum flow
(the minimum flow is 70% of the design flow). When the water flow is satisfied, the flow
switch will stay in closed state.
7) The water filter must be installed before the water inlet pipeline of the unit, and include a
25-mesh screen. This will stop foreign material from entering into and decreasing the
performance of the evaporator.
8) A strainer should be placed for enough upstream to prevent cavitation at the pump inlet (consult
pump manufacturer for recommendations). The use of a strainer will prolong pump life and help
maintain high system performance levels
9) Flushing and insulating the water piping must be done before it is connected to the unit to
prevent dirt from damaging the unit.
10) The design water pressure of the water chamber is 1.0 Mpa. Use of the water chamber must
not exceed this pressure to avoid damaging the evaporator.
11) Do not load the weight of water pipe onto the unit. When water inlet/outlet are connected to
corresponding water pipe, soft connections such as rubber joints should be used to avoid the
transmitting vibration indoors .
12) In a close loop water system, to diminish the impact on water pipe because of the expansion or
contraction of water volume and avoid impact from supplementing water pressure, water return
side should be fitted with an expansion water tank. The expansion tank should be installed
1~1.5m higher than the system, and its capacity accounts about 1/10 of the water in the whole