Table 39 - Chilled/Hot And Cooling Water Quality Control (Maximum Concentrations) - York EX Series Installation, Operation & Maintenance Instructions Manual

FORM 155.32-ICOM1.EN.GB
ISSUE DATE: 10/13/2017

TABLE 39 - CHILLED/HOT AND COOLING WATER QUALITY CONTROL (MAXIMUM CONCENTRATIONS)

ELEMENT
(1) (6)
CIRCULATING
WATER
pH (25°C) 6.5~8.2
Electric
Conductivity Max. 80
(mS/m) (25°C) (Max. 800)
(µS/cm) (25°C)
(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
Max. 50
(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
Chlorine Max. 0.3
(mgCI/I)
Free Carbonate
Max. 4.0
Acid (mgCO /I)
2
Stability Index 6.0~7.0
NOTES:
1. The item names, their definitions, and units are based on JIS K 0101. Units and figures in braces are those which were used formerly. 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 (40°C or higher), corrosion develops noticeably. 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. Demineralized water, neutral water, and
softened water are excluded.
6. The 15 items shown above are representative factors in corrosion and scale formation.
JOHNSON CONTROLS
COOLING WATER SYSTEM
CIRCULATING
CIRCULATING
TYPE
WATER
REPLENISH PASSING
WATER WATER
6.0~8.0 6.8~8.0
Max. 30 Max. 40
(Max. 300) (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. 0.3 Max. 1.0
Max. 0.1 Max. 0.1
NO IONS ALLOWED
Max. 0.1 Max. 1.0
Max. 0.3 Max. 0.3
Max. 4.0 Max. 4.0
–
(4)
CHILLED/HOT WATER
NON-
SYSTEM
CIRCULATING
WATER
(20°C OR
LOWER)
6.8~8.0
Max. 40
(Max. 400)
Max. 50
Max. 50
Max. 50
Max. 70
Max. 50
Max. 30
Max. 1.0
Max. 0.1
Max. 1.0
Max. 0.3
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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