Midea Aqua Tempto Power Series, Руководство пользователя

Страница: 169 / 213

MCAC-ATSM-2014-09 Aqua tempo power series tropical air-cooled scroll chiller 50Hz
167
PH
value Total
hardness Conductivity Sulfide
ion Chloride
ion Ammonia
ion Sulfate
ion Silicon Iron
content Sodium ion Calcium
ion
7
～
8.5
<50ppm
<20μV/cm(25
℃
) No <50ppm No <50ppm <30ppm <0.3ppm
No
requirement <50ppm
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 its 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