Samsung AM***MXWA Series - Cooling Water Management; Cooling Water Quality Standards

ENGLISH-103
03 OTHERS
Cooling water management
1. Standard of cooling water quality for air conditioning and the number of water quality inspection
 Make sure to comply the standard for water quality management.
 Cooling water with high level of foreign substances can cause pipe corrosion or creation of water scale which eects the
product's performance and lifespan. (Use the appropriate heat source water according to the below table) If the system
water is sourced from anything other than the local water supply, make sure to check the quality of water.
 For water quality management on the heat source water of closed circuit water cooling must be done according to the
below table. If the water quality is not managed according to the below table, it may decrease the performance of air
conditioner and cause serious problem on the product.
Classication Item
Closed circuit system Eects
Recommended
number for water
quality inspection
Heat source
water
Make-up water Corrosion Scale
Standard
value
pH[25 °C] 7.0~8.0 7.0~8.0
 
Twice a month
Electric conductivity [25 °C]
(mS/m)
30 or below 30 or below
 
Chloride ion (mg Cl
-
/L) 50 or below 50 or below

Once a month
Sulfate ion (mg S0
4
2-
/L) 50 or below 50 or below

M alkali level [pH 4.8](mg
CaCo
3
/L)
50 or below 50 or below

Total hardness (mg CaCo
3
/L) 70 or below 70 or below

Calcium hardness (mg
CaCo
3
/L)
50 or below 50 or below

Ionized silica (mg SiO
2
/L) 30 or below 30 or below

Reference
Iron (mg Fe/L) 1.0 or below 0.3 or below
 
Once a month
Copper (mg Cu/L) 1.0 or below 1.0 or below

Sulfate ion (mg S
2-
/L)
Not to be
detected
Not to be
detected

Ammonium ion (mg NH
4
+
/L) 0.3 or below 0.1 or below

Residual chlorine (mg Cl/L) 0.25 or below 0.3 or below

Free carbon dioxide (mg
CO
2
/L)
0.4 or below 0.4 or below

Stability index - -
 
• Circle (O) denotes the factor relevant to corrosion or water scale.
• When the water temperature is over 40˚C, steel without protective coating may corrode when exposed to water.
Applying corrosion prevention material or degassing can be an eective measure to prevent corrosion.
• For the cooling water and the make-up water, used under closed circuit water system with closed circuit cooling
tower, should satisfy the standard shown in above table.
• Supplied water or make-up water should be tap water, industrial water or groundwater. Puried water,
neutralized water and softened water should not be supplied.
• 15 items in the above table is a typical factor for corrosion and/or water scale.
CAUTION