Coolant For The Raw Water Circuit On The Plant Side; Coolant Properties - Siemens SINAMICS S120 Manual

Commissioning the cooling circuit

5.2 Coolant for the raw water circuit on the plant side

5.2 Coolant for the raw water circuit on the plant side
5.2.1

Coolant properties

The coolant must fulfill the following requirements over the long term.
Table 5- 2
Electrical conductivity
pH value
Total hardness
SK 4.3 (upper limit value of polymer phosphates
for untreated additional water)
Dissolved iron
Dissolved copper
Ortho phosphate
Chlorides (CL
Sulfate (SO
Biological stress
SiO
Aluminum
Fluoride
Size of entrained particles
Permissible limit values for suspended particles in the cooling water: No deposits of solid
particles at ≥0.5 m/s
Note
Cooling water that can be alternatively used
Distilled, demineralized water, also known as deionized water, completely desalinated water
(VE water) or Deionat, is not suitable by itself as coolant.
It can be used as basis when using antifreeze.
Note
Analyzing the liquid coolant
It is recommended that you contact the coolant manufacturer for analyzing the liquid coolant.
The coolant should be checked 3 months after the cooling circuit is filled for the first time
and, subsequently, once a year.
If the cooling water becomes cloudy, is colored, or becomes contaminated by mold spores,
the cooling circuit must be cleaned and refilled.
120
Requirements relating to the coolant (basis VDI 3803)
)
-
)
2-
4
as silicic acid
2
Unit
µS/cm
°dH
mmol/l
mg/l
mg/l
mg/l
mg/l
mg/l
CFU/ml
mg/l
mg/l
mg/l
mm
Cabinet Modules liquid cooled
Equipment Manual, 04/2020, A5E37067587A
Value
<2200
7.5 ... 9.0
<20 (T < 40 °C)
<10
<3.0
<0.2
<50
<180
<200
<50
<47
<2.65
<4.0
≤0.5