Table 32 - Chilled And Cooling Water Quality Control (Maximum Concentrations) - York YHAU-CW Manual

FORM 155.31-ICOM2.EN.UL
ISSUE DATE: 12/21/2018

TABLE 32 - CHILLED AND COOLING WATER QUALITY CONTROL (MAXIMUM CONCENTRATIONS)

ELEMENT
(1) (6)
CIRCULATING
pH (77 °F)
Electric
Conductivity
(mS/m) (77 °F) (Max. 800)
(µS/cm) (77 °F)
(1)
Chloride Ion
Max. 200
(MGCLˉ/L)
Sulfulic Acid Ion
Max. 200
(mgSO ˉ/I)
2
4
Acid
Consumption
Max. 100
(PH4.8)
(mgCaCO /I)
3
Total Hardness
Max. 200
(mgCaCO /I)
3
Calcium
Hardness Max. 150
(mgCaCO /I)
3
Ionized Silica
(mgS O /I)
i 3
Iron (mgFe/I) Max. 1.0
Copper (mgCu/I) Max. 0.3
Sulfurization Ion
(mgS ˉ/I)
2
Ammonium Ion
Max. 1.0
(mgNH +/I)
4
Residual
Max. 0.3
Chlorine (mgCI/I)
Free Carbonate
Max. 4.0
Acid (mgCO /I)
2
Stability Index
NOTES:
1. The item names, their definitions, and units are based on JIS K 0101. Units and figures in parentheses () are those which were previously
used. They are shown here for reference purposes.
2. In the "Tendency" column, a white circle ( ) indicates that a particular item is a factor in corrosion/scale formation.
3. Generally speaking, when the water temperature is high (104 °F or higher), noticeable corrosion develops. Especially when steel material
which makes direct contact with water has no protective covering, it is desirable to provide a suitable corrosion-preventive measure, such as
adding a corrosion-preventive agent or applying deaeration treatment.
4. In a cooling water system using a closed cooling tower, the closed-circuit circulating water and its replenishment water shall meet the quality
standards for a hot water system, and the sprinkling water and its replenishment water shall meet the quality standards for a circulation-type
cooling water system.
5. The supply water and replenishment water shall be tap water, industrial water, or ground water. Do NOT use demineralized water, neutral
water, or softened water.
6. The items shown above are representative factors in corrosion and scale formation.
JOHNSON CONTROLS
COOLING WATER SYSTEM
CIRCULATING
CIRCULATING
TYPE
REPLENISH
WATER WATER
6.5~8.2 6.0~8.0
Max. 80 Max. 30
(Max. 300)
Max. 50
Max. 50
Max. 50
Max. 70
Max. 50
Max. 50 Max. 30
Max. 0.3
Max. 0.1
NO IONS ALLOWED
Max. 0.1
Max. 0.3
Max. 4.0
6.0~7.0 –
(4)
NON-
CHILLED WATER SYSTEM
WATER
CIRCULATING
PASSING WATER
WATER (68°F OR
LOWER)
6.8~8.0 6.8~8.0
Max. 40 Max. 40
(Max. 400) (Max. 400)
Max. 50 Max. 50
Max. 50 Max. 50
Max. 50 Max. 50
Max. 70 Max. 70
Max. 50 Max. 50
Max. 30 Max. 30
Max. 1.0 Max. 1.0
Max. 0.1 Max. 0.1
Max. 1.0 Max. 1.0
Max. 0.3 Max. 0.3
Max. 4.0 Max. 4.0
– –
SECTION 7 – MAINTENANCE
TENDENCY
REPLENISH
WATER
6.8~8.0
Max. 30
(Max. 300)
Max. 50
Max. 50
Max. 50
Max. 70
Max. 50
Max. 30
Max. 0.3
Max. 0.1
Max. 0.1
Max. 0.3
Max. 4.0
–
(2)
7
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