Carrier 16LJ-A Series Operation Manual page 33

2. Analysis of water quality
Check the water quality of make up water to satisfy the water quality guideline "JRA GL-02-1994".
About the analysis of water quality, contact a water treatment company.
3. Method of water treatment
(1) Blow down
Manage the recycling water quality to satisfy the water quality guideline "JRA GL-02-1994".
(2) Addition of anticorrosive
Contact a water treatment company.
4. Precaution
In case of using a black pipe for cooling water line or chilled water line, use an anticorrosive for
black pipe to prevent adherence of the iron rust on copper tubes of the chiller.
(1) Adherence of fouling like the iron rust on copper tube may cause a corrosion. It is necessary to
add an anticorrosive for copper tube. Consult a water treatment company.
(2) Do not install the cooling tower near an exhaust gas outlet or ventilation port. Otherwise, the
quality of cooling water becomes poor and it causes corrosion problems.
(3) In case of installing a heat storage tank in chilled water line, there is a possibility to cause a
corrosion on the tubes by oxygen in chilled water or fouling of the heat storage tank. Install a
heat exchanger between the heat storage tank and the chiller or consult a service agent.
(4) When flashing of piping is performed at the first time, bypass the chiller to prevent foreign matter
from getting into it.
(5) In case of installing the chiller into an existing facility, there is a possibility to prevent a forming
the anti corrosion film on copper tubes by influence of a fouling of the existing piping. Consult
the service agent about the water treatment of post replacement.
5. Water quality standard
Water quality standard is shown below as an extract from JRA-GL02-1994.
Water quality standard for cooling water
pH(at 25C(77F))
Electrical conductivity 25C
Chloride ion
Sulfuric acid ion
Acid consumption (pH 4.8)
Total hardness
Calcium hardness
Ion silica
Iron
Copper
Sulfide ion
Ammonium ion
Residual chlorine
Free carbon dioxide
Ryzner stability index
Cooling water line
Circulation
Circulation
6.5 - 8.2
ms/m 80 or less
-
200 or less
mgCl /l
2-
200 or less
mgSO /l
4
mgCaCO /l 100 or less
3
mgCaCO /l 200 or less
3
mgCaCO /l 150 or less
3
mgSiO /l 50 or less
2
mgFe/l 1.0 or less
mgCu/l 0.3 or less
2-
No detected No detected No detected
mgS /l
+
1.0 or less
mgNH /l
4
mgCl/l 0.3 or less
mgCO /l 4.0 or less
2
RSI 6.0 - 7.0
5-4
One way
Make up
6.0 - 8.0 6.8 - 8.0
30 or less 40 or less
50 or less 50 or less
50 or less 50 or less
50 or less 50 or less
70 or less 70 or less
50 or less 50 or less
30 or less 30 or less
0.3 or less 1.0 or less
0.1 or less 1.0 or less
0.1 or less 1.0 or less
0.3 or less 0.3 or less
4.0 or less 4.0 or less
*** ***
Tendency
Corrosion Scale
Yes Yes
Yes Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes Yes
Yes
Yes
Yes
Yes
Yes
Yes Yes