G 01053 - Edition 13 - September 14
1/2
B 30
Connection to the cooling circuit
Water characteritics
In order to limit corrosion and motor cooling circuit clogging
, it is
recommended to use cooling water with the following characteristics:
pH:
5.5 to 9
Chlorine
(1)
: 100 to 20 ppm depending on the pH
Hardness: < 10 °fH (french degree)
< 2 milli-equivalent/L
< 100 mg/L of CaCO3 (Calcium carbonate)
Total disolved solids: < 300 mg/L
LSI:
< 0 to +20°C
Resistivity:
2000 .cm < R < 1000000 .cm
Particles size: < 0.2 mm
Input temperature
(2)
: +10°C to +35°C
Relative input pressure: 2 ·10
3
hPa to 6·10
3
hPa
3·10
3
hPa to 6·10
3
hPa
(ADS 1802)
Differential pressure (inlet/outlet) : > 2 ·10
3
hPa
3
·10
3
hPa
(ADS 1802
)
Water flow: see
A 40
(1)
The oxidising action of the chlorine depends on the pH (aggressiveness of the
water). The chlorine content must be within the coloured area on the graph opposite.
(2)
Subject to pump temperature setting.
The use of uncontrolled city water can lead to water circuit clogging due to
limestone deposition, which may necessitate in the worst case a complete
cleaning and overhaul of the cooling circuit.
The presence of micro-organisms like aquatic weed and micro-biological
substances like bacteria can lead to cooling problem in the pump.
Appropriate water treatment system need to be use to prevent such growth
of micro-organisms.
50
40
20
100
0
5
6
7
8
9
10
pH
Chloride (ppm)
adixen Vacuum Products - Operating instructions - ADP/ADS Series Two
