8
installation & owner’s manual
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
<200μV/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
Њ
8.5
4.9 Installation & regulation guide for target flow
controller
Please carefully check flow switches before conducting
installation of the target flow controller. 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.
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.
Pay attention to the following items when conducting
installation and wire connection:
4.9.1
4.9.2
4.9.3
4.9.4
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.
To avoid electric shock and damages to the devices, the
power supply should be cut off, when wires are connected
or adjustment is done.
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.
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.
Flow switches have been set at minimal flow value prior to
ex-factory. They should not be adjusted below the
ex-factory setting value, 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.
a.
b.
c.
d.
e.
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).
8
installation & owner’s manual
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 wa
wa
w
wa
w
wa
wa
wa
ter or river water must be filtered and softened
in
n
sof
sof
sof
sof
sof
sof
sof
ten
ten
ten
ten
ten
ten
ten
en
n
ing
ing
ng
g
ng
ing
ing
ng
ng
wa
wa
wa
wa
wa
wa
wa
wa
wa
ter
t
ter
ter
ter
ter
ter
ter
ter
eq
eq
eq
eq
eq
eq
e
eq
e
uipment before flowing into chilled water
sys
ys
ys
ys
ys
ys
ys
ys
tem
tem
tem
tem
tem
tem
tem
tem
em
I
I
I
I
I
I
I
. I
f
f
f
f
f s
f
f
and
and
and
and
and
d
and
and
an
an
an
an
an
an
an
n
n
d c
d c
d c
d c
d c
d c
d c
d
lay
lay
lay
lay
lay
lay
la
la
a
settle i
i
i
n t
n t
t
n t
he eva
eva
eva
eva
eva
eva
a
a
por
p
p
p
p
ato
t
to
to
r
r
r,
cir
r
r
r
r
r
cul
cul
cul
ati
ati
ati
on
on
on
of
of
f
of
chi
chi
chi
chi
chi
chi
chi
h
h
lle
lle
lle
ll
lle
lle
lle
lle
d w
d w
d w
d w
d w
d w
d w
d w
ate
ate
ate
ate
ate
ate
ate
ate
r m
r m
m
m
r m
m
m
ay be
be
be
be
be
be
e
e
blocke
e
ed,
and
d
d
d th
h
h
h
h
h
h
us
u
u
u
u
u
u
u
u
lea
lea
lea
a
din
n
n
n
n
n
g t
g t
g t
g t
o f
f
f
f
f
f
free
ree
e
ree
e
zing
g
g
acc
acc
acc
acc
acc
acc
acc
acc
ide
ide
ide
ide
ide
ide
de
ide
nts; i
; i
; i
; i
i
; i
; i
;
f h
f h
f h
f h
f h
f h
f h
f h
ard
ar
a
ar
a
ar
a
ar
a
nes
nes
nes
nes
nes
es
es
s
s o
s o
s o
s o
s o
s o
s
s
f chill
l
ed
wa
a
t
ter
r
is
is
is
is
is
is
is
is
t
to
to
to
to
to
to
to
to
o h
h
h
high, fu
urri
i
i
ing ma
y
occ
occ
occ
occ
occ
occ
occ
c
ur
ur
ur
ur
ur
ur
ur
r
e
ea
ea
eas
eas
ea
e
e
ily
ily
y
y
y
y
y
y
, and
the
the
the
the
the
the
h
he
de
d
d
d
d
d
d
vices
s
m
m
may
b
b
be
co
o
rro
rr
rr
r
rr
rr
rr
rr
r
de
e
d. The
eref
f
f
fore, the
e
e
qua
qua
qua
qua
qua
qua
qua
qua
a
lit
lit
lit
it
lit
lit
lit
it
y o
o
o
o
o
o
o
f c
f c
f c
f c
f c
f c
f c
hil
h
led
led
led
ed
ed
ed
ed
ed
wate
te
ter
ter
te
te
te
te
e
should b
d b
d b
b
d
d b
d b
e a
a
a
a
na
l
nal
na
l
nal
yzed b
b
b
b
e
e
e
efo
e
re bei
ei
ei
ei
n
n
n
ng
n
n
used,
d
d
d
d
d
such
h
h
h
h a
h
h
h
s PH v
v
v
v
v
alu
alu
alu
alu
alu
alu
alu
alu
alu
e, conductivity, concentration of chloride ion,
concentra
tra
tra
tra
tra
tra
ra
tio
ti
ti
ti
tio
tio
t
tio
n o
n o
n o
n o
n o
n o
n o
n o
f
f
f
f
f sulfide ion, and so on.
<50ppm
<50ppm
<30ppm
<200μV/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
Њ
8.5
4.9 Installation & regulation guide for target flow
controller
Please carefully check flow switches before conducting
installation of the target flow controller. 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.
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.
Pay attention to the following items when conducting
installation and wire connection:
4.9.1
4.9.2
4.9.3
4.9.4
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.
To avoid electric shock and damages to the devices, the
power supply should be cut off, when wires are connected
or adjustment is done.
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
y
y
suffer
displa
pla
pla
cem
cem
m
m
m
m
m
m
ent
ent
ent
ent
ent
ent
t
nt
, t
, t
t
t
, t
, t
t
hus
hus
hus
hus
us
hus
hus
hus
u
lea
a
adin
n
ng to
t
t
to
t
t
to
fai
fa
a
fa
a
lur
r
r
r
r
e o
e o
e o
e o
f
f
f f
f
lo
o
ow
ow
o
o
o
o
sw
s
s
s
s
s
s
s
itc
tc
tc
tc
tc
tc
tc
tc
he
e
e
es
e
e
e
e
.
Spe
Spe
Spe
Spe
Spe
Spe
Spe
S
ci
al g
g
g
g
g
g
g
rou
rou
rou
rou
rou
rou
ndi
nd
nd
nd
nd
nd
nd
d
d
ng
g
g
g
g
g
g
s
s
scre
e
ews sh
h
hou
u
uld be used
d
sed
sed
d
sed
sed
for earth
con
on
on
on
on
on
n
n
ne
e
ectio
o
o
o
o
o
o
o
n.
n
n.
n
n
n
n
Bol
B
B
B
B
ts
s
s
s
s
s
s
s
sho
o
ould
d
d not b
b
be
installed o
o
o
or
removed at
will; otherwise flow switches may suffer deformation and
failur
ur
ur
ur
ur
ur
ur
ur
ur
e.
e
e
e
e
e
e
e
e
Fl
Fl
Fl
Flo
F
F
Fl
F
w switche
h
h
h
h
h
h
h
s h
h
ave be
e
e
e
e
e
e
e
en
en
en
en
en
e
e
e
set
t
t
t
t
t
t
at
t
t
t
t
minim
i
i
al
fl
fl
flo
fl
w valu
l
l
l
l
l
l
e prior to
ex-factory. They should not be adjusted below the
ex-factory setting value, 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.
a.
b.
c.
d
d
d
d.
e.
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).
