Carrier 16LJ-A Series - WATER QUALITY STANDARDS SPECIFICATIONS; Chilled and Hot Water Quality Standards

5-5
Water quality standard for chilled water
Water quality standard for hot water
(1) The item appellation and its definition and the unit belong to JIS K 0101.
(2) The “yes” in the chart show the factor relevant to corrosion or scale genesis.
(3) When high temperature (over 40
o
C);generally, using corrosive steel, materials which have no
protective coating against water, anticorrosive measure shall be done such as adding corrosion
prevention material, degasser and etc.
(4) Under the Cooling water system with hermetically-closed cooling tower; the closed-circuit
circulating water and its Makeup water are based on Hot water standard, spreading water and
its Makeup water are based on circulating Cooling water system.
(5) Supplied / replenished water needs to be tap water or industrial water or groundwater.
Deionized water, regeneration treated water and softening treated water are excluded.
(6) Upper15 items are shown as a typical factor for corrosion and/or scale genesis.
[Note 1] Each item of the standard values may cause a failure due to corrosion or scale and if any
item deviates from the standard value, it is assumed that corrosion or scale tends to be
caused, therefore, these should be periodically managed.
[Note 2] As the range of the water quality which may become usable if the water is processed
differs depending on the chemicals to be used, it is not given here. It is desirable to set
the appropriate water quality management values under the guidance of a water
processing specialist and periodically manage the water quality.
Circulation
T=<20C(68F)
pH(at 25C(77F)) 6.5 - 8.0 6.0 - 8.0 Yes Yes
Electrical conductivity 25C ms/m 40 or less 30 or less Yes Yes
Chloride ion
mgCl
-
/l
50 or less 50 or less Yes
Sulfuric acid ion
mgSO
4
2-
/l
50 or less 50 or less Yes
Acid consumption pH 4.8 mgCaCO
3
/l 50 or less 50 or less Yes
Total hardness mgCaCO
3
/l 70 or less 70 or less Yes
Calcium hardness mgCaCO
3
/l 50 or less 50 or less Yes
Ion silica mgSiO
2
/l 30 or less 30 or less Yes
Iron mgFe/l 1.0 or less 0.3 or less Yes Yes
Copper mgCu/l 1.0 or less 0.1 or less Yes
Sulfide ion
mgS
2-
/l
No detected No detected Yes
Ammonium ion
mgNH
4
+
/l
1.0 or less 0.1 or less Yes
Residual chlorine mgCl/l 0.3 or less 0.3 or less Yes
Free carbon dioxide mgCO
2
/l 4.0 or less 4.0 or less Yes
Ryzner stability index RSI *** *** Yes Yes
StandardReference
Tendency
Make up
Chilled water line
Corrosion Scale
Circulation Make up Circulation Make up
pH(at 25C(77F)) 7.0 - 8.0 7.0 - 8.0 7.0 - 8.0 7.0 - 8.0 Yes
Electrical conductivity 25C ms/m 30 or less 30 or less 30 or less 30 or less Yes
Chloride ion
mgCl
-
/l
50 or less 50 or less 30 or less 30 or less Yes
Sulfuric acid ion
mgSO
4
2-
/l
50 or less 50 or less 30 or less 30 or less Yes
Acid consumption pH 4.8 mgCaCO
3
/l 50 or less 50 or less 50 or less 50 or less
Total hardness mgCaCO
3
/l 70 or less 70 or less 70 or less 70 or less
Calcium hardness mgCaCO
3
/l 50 or less 50 or less 50 or less 50 or less
Ion silica mgSiO
2
/l 30 or less 30 or less 30 or less 30 or less
Iron mgFe/l 1.0 or less 0.3 or less 1.0 or less 0.3 or less Yes
Copper mgCu/l 1.0 or less 0.1 or less 1.0 or less 0.1 or less Yes
Sulfide ion
mgS
2-
/l
No detected No detected No detected No detected Yes
Ammonium ion
mgNH
4
+
/l
0.3 or less 0.1 or less 0.1 or less 0.1 or less Yes
Residual chlorine mgCl/l 0.25 or less 0.3 or less 0.1 or less 0.3 or less Yes
Free carbon dioxide mgCO
2
/l 0.4 or less 4.0 or less 0.4 or less 4.0 or less Yes
Ryzner stability index RSI *** *** *** *** Yes
Hot water line
60C(140F)=<T<90C(194F)
Yes
Yes
Yes
Yes
Yes
StandardReference
20C(68F)=<T<60C(140F)
Yes
Tendency
ScaleCorrosion
Yes
Yes