Installation manual
11
7) After cleaning, close the isolating valve, and take down the
cleaning system devices and keeping properly for backup.
8) Please contact the waste liquor treating company to treat the
Table.5-2
collected waste liquor.
ITEMS
9) Connect the unit water system as the state before cleaning,
thoroughly check the unit and assist devices whether work
normally. Make sure there is no abnormal situation then
re-operates the unit.
WARNING
● The cleaning liquor flow direction must be correctly connected.
● Because different water quality and different using situations of
the heat exchanger, the cleaning period and method will be big
different, the above method is only for reference.
● The double-pipe heat exchanger is internal thread red copper
pipe, so that it can not use nitric acid as cleaning agent!
● The cleaning liquor and neutralization will be irritated and
corrosive to human eyes and skin, so please do well protection
measurements during the cleaning.
● It is strongly suggested that the user calls for professional
cleaning company to do component analysis of the water
quality and scale, and make a effective cleaning solution and
Chromaticity
Turbidity NTU
Smell
Visible objects
PH Value
Total hardness
(Take CaCO
3
for calculation)
Fe
AL
Mn
Cu
Zn
CONCENTRATION (mg/L)
≤15
, a
nd can not
display other colors
≤1
None
None
7.5
～
9
≤200
<0
.5
<0
.2
<0
.1
<0
.2
≤0.1
method, then do the cleaning.
5.7 System water quality requirements and
Alkalinity concentration(HCO
3-
)
70
～
300
management
5.7.1 The unit water system must select the closed cooling
tower.
5.7.2 Circulating Chilled Water Processing Design Standard,
Sulfate radicalSO
4
2-
)
HCO
3-
/SO
4
2-
Conductivity
NH
3
CL
-
Chlorine
5.7.3
other index also should meet with the Table.5.2.
It should periodically to detect and handle the chilled
water quality in the water system. When handling the
water, please make sure with the water dealing person
to confirm that use any water scale inhibitor and
antiseptic agent etc. will not have corrosion to the
<7
0
>1
10
～
500 μs/cm(20°C)
<0.1
<100
<1
<0,05
<5
<100
≤20
stainless steel and copper products.
500
～
1000
H
2
S
Free carbon dioxide
CO
2
ε
Nitrate radical
NO
3-
)
Suspended matter
Soluble solid
Oxygen consumption
(
Take
O
2
for calculation
)
≤3
<1
Ammonium ion
(N
H
4
)
SiO
2
(
Ion state
)
<50
