4.8 Water quality control
4.8.1 Water quality control
When industrial water is used as chilled water, little furring may
occur; however, well water or river water, used as chilled water,
may cause much sediment, such as furring, sand, and so on.
Therefore, well water or river water must be filtered and softened
in softening water equipment before flowing into chilled water
system. If sand and clay settle in the evaporator, circulation of
chilled water may be blocked, and thus leading to freezing
accidents; if hardness of chilled water is too high, furring may
occur easily, and the devices may be corroded. Therefore, the
quality of chilled water should be analyzed before being used,
such as PH value, conductivity, concentration of chloride ion,
concentration of sulfide ion, and so on.
<50ppm
<50ppm
<30ppm
<200
μ
V/cm
đ
<0.3ppm
<50ppm
<50ppm
4.8.2 Applicable standard of water quality for the unit
PH value
Total hardness
Conductivity
Sulfide ion
Chloride ion
Ammonia ion
Sulfate ion
Silicon
Iron content
Sodium ion
Calcium ion
No
No
No requirement
Table 4-2
7
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8.5
4.9 Installation & regulation guide for target flow
controller
4.9.1 Please careful get flow controller. Packing should be in
good condition, and the appearance should be free of damage
and deformation. If any problem, please contact the manufac-
turer.
4.9.2 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.
4.9.3 Target flow controller 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 connectioncan be easily done.
4.9.4 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.
Network ON
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O&I manual
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4.7 Selection and installation of the pump
4.7.1 Select the pump
a. Select the water-flow of the pump
The rated water-flow must no less than the unit rated water-flow;
in terms of multi-connect the units, that water-flow must no less
than total units’ rated water-flow.
b. Select the left of the pump.
H=h1+h2+h3+h4
H: The lift of the pump.
h1: Main unit water resistance.
h2: Pump water resistance.
h3: Water resistance of the longest water-loop distance,
includes: pipe resistance, different valve’s resistance, flexible
pipe resistance, pipe elbow and three-way resistance, two-way
resistance or three-way resistance, as well as filter resistance.
H4: the longest terminal resistance.
4.7.2 Installation the pump
a. The pump should be installed at the water inlet pipe, both of
which sides must mount the soft connectors for vibration-proof.
b. The backup pump for the system (recommended).
c. Units must with a main unit controls (Please see
Fig. 5-3
for
the controls wiring diagram).
Содержание ICHS-600KC-5
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