Table 24 - Chilled / Hot And Cooling Water Quality Control (Maximum Concentrations) - York YHAU-CE Installation Operation & Maintenance

FORM 155.35-ICOM2.EN.CE/GB (1018)
DATE: 10/30/2018

TABLE 24 - CHILLED / HOT AND COOLING WATER QUALITY CONTROL (MAXIMUM CONCENTRATIONS)

ELEMENT
(1) (6)
CIRCULATING
pH (25°C)
Electric
Conductivity (mS
per m) (25 °C)
(Max. 800)
(µS per cm)
(25°C)
(1)
Chloride Ion
(mgClˉ per l)
Sulfuric Acid Ion
(mSO ˉ per I)
2
4
Acid Consumption
(PH 4.8)
(mgCaCO per I)
3
Total Hardness
(mgCaCO per I)
3
Calcium Hardness
(mgCaCO per I)
3
Ionized Silica
(mgS O per I)
i 3
Iron (mgFe per I)
Copper (mgCu
per I)
Sulfurization Ion
(mgS ˉ per I)
2
Ammonium Ion
(mgNH per I)
+
4
Residual Chlorine
(mg CI per I)
Free Carbonate
Acid (mgCO per
2
I)
Stability Index
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 and scale formation.
3. Generally speaking, when the water temperature is high (40 °C 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 qual-
ity 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 items shown in the table above are representative factors in corrosion and scale formation. Storage Method of the Chiller-Heater
JOHNSON CONTROLS
COOLING WATER SYSTEM
CIRCULATING
TYPE
REPLENISH
WATER WATER
6.5~8.2 6.0~8.0
Max. 80 Max. 30
(Max. 300)
Max. 200 Max. 50
Max. 200 Max. 50
Max. 100 Max. 50
Max. 200 Max. 70
Max. 150 Max. 50
Max. 50 Max. 30
Max. 1.0 Max. 0.3
Max. 0.3 Max. 0.1
NO IONS ALLOWED
Max. 1.0 Max. 0.1
Max. 0.3 Max. 0.3
Max. 4.0 Max. 4.0
6.0~7.0 –
(4)
CHILLED / HOT WATER
NON-
SYSTEM
CIRCULATING
WATER
CIRCULATING
PASSING WATER
WATER (20 °C 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
(2)
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
–
105
7