MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz
87
12.2.3 Installation & regulation guide for water flow switch
● Please carefully check flow switches before conducting installation of the water flow switch. Packing
should be in good condition, and the appearance should be free of damage and deformation. If any problem,
please contact the manufacturer.
● Flow switches can be installed in the horizontal pipeline or the vertical pipeline with upward flowing
direction but cannot be mounted in the pipeline with downward flowing direction. The inlet water of gravity
should be taken into account when flow switches are installed in the pipeline with upward flowing direction.
●Water flow switch must be installed on a section of straight-line pipeline, and the both ends must be
supplied with straight-line pipes whose length is at least 5 times diameter of the pipe. In the meanwhile, the
fluid flowing direction in the pipeline must be consistent with the direction of arrow on the controller. The
connection terminal should be located where wiring connection can be easily done.
● Pay attention to the following items when conducting installation and wire connection:
a. Collision of the wrench with the soleplate of the flow switch is prohibited, since such collision may cause
deformation and failure of the flow switch.
b. To avoid electric shock and damages to the devices, the power supply should be cut off, when wires are
connected or adjustment is done.
c. When wiring connection is conducted, adjustment of other screws except connection terminals of micro
switches and ground screws is prohibited. In the meanwhile, over great force should not applied when wires
of micro switches are connected, otherwise micro switches may suffer displacement, thus leading to failure
of flow switches.
d. Special grounding screws should be used for earth connection. Bolts should not be installed or removed
at will; otherwise flow switches may suffer deformation and failure.
e. Flow switches have been set at minimal flow value before leaving the factory. They should not be adjusted
below the setting value at the factory, or they may suffer failure. After installing flow switches, please press
the flow switch lever several times to check them. When the lever is found not to respond with
“
clatter”,
rotate the screw in a clockwise direction, until “clatter” occurs.
f. Be sure to determine the model of target slice according to the rated flow of the unit, the diameter of the
outlet pipe and the adjustment range of the target slice of the flow switch. Besides, the target slice should not
contact with other restrictors in the pipeline or on the inner wall of the pipeline, or the flow switch cannot be
reset normally.
● Determine whether the flow switch and the system connected with it are in good operation according to the
measured value by flow meter, namely, when the measured value on flow meter is less than 60% of rated
water flow of the unit, the water flow switch should be cut off and observed for 3 working periods, and it
should be covered with flow switch shell timely.
Schematic diagram of water flow switch
12.2.4 Installation of water system pipeline for 30kW module
Summary of Contents for MGBT-F120W/PN1
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