Table of Contents
Advertisement
13. Installation
Classification
Item
pH [25 °C (77 °F)]
Electric conductivity
[25 °C (77 °F)] (mS/m)
Chloride ion (mg Cl-/L)
Sulfate ion (mg S0
Standard
M alkali level [pH 4 .8]
value
(mg CaCo
Total hardness (mg CaCo
Calcium hardness
(mg CaCo
Ionized silica (mg SiO
Iron (mg Fe/L)
Copper (mg Cu/L)
Sulfate ion (mg S
Reference
Ammonium ion (mg NH
Residual chlorine (mg Cl/L)
Free carbon dioxide
(mg CO
Stability index
• Circle (O) marks in the chart show the factor relevant to corrosion or water scale.
• When the water temperature i s over 40 ˚C (104 ˚F), steels wi t hout protecti v e coati n g may corrode
NOTE
when exposed to water. Appl ng corrosi o n preventi o n materi a l or degassi n g can be effecti v e
measure to prevent corrosi o n.
• 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. Purified 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.
• When water pipe circuit freezes, it will cause breakage on the plate type heat exchanger.
Therefore appropriate preventive measure must be taken according to the situation.
− Drain remaining water in the water pipe
− Constantly operate the water pump to circulate the water within the water pipe
− Install a self-regulating heat cable on the water pipe
• Open the valve of the water pipe connected to the outdoor unit after flushing (cleaning foreign
substances in water pipe) is completed.
• Check that air is vented from the water pipe and circulation amount is secured before opening the
service valve on the refrigerant side of the outdoor unit.
• If water flow stops during outdoor unit operation, it may cause breakage on plate type heat
exchanger.
Closed type system
Circulating water
7 .0 ~ 8 .0
30 or below
50 or below
2
-/L)
50 or below
4
50 or below
/L)
3
/L)
70 or below
3
50 or below
/L)
3
/L)
30 or below
2
1 .0 or belo w
1 .0 or belo w
Not to be
2
-/L)
detected
+/L)
0 .3 or belo w
4
0 .25 or belo w
0 .4 or belo w
/L)
2
-
Effects
Supplemented
Corrosion
water
7 .0 ~ 8 .0
O
30 or below
O
50 or below
O
50 or below
O
50 or below
70 or below
50 or below
30 or below
0 .3 or belo w
O
1 .0 or belo w
O
Not to be
O
detected
0 .1 or belo w
O
0 .3 or belo w
O
0 .4 or belo w
O
-
O
Recommended
number for water
Scale
quality inspection
O
O
O
O
O
O
Once a year
O
O
O
Advertisement
Table of Contents
