Installation
35
300554859_002_C0 - 11/2016 - © Leybold
Water Cooling
Connect the cooling water hoses.
The hose connections may be unscrewed and removed, to make use of the
integrated G 1/8"-threads.
3.7.1 Cooling Water
Adjust the cooling water temperature so that the formation of condensate is
avoided. With pump downtimes the cooling water has to be turned off.
When switching the cooling water supply on and off by means of an electric-
ally actuated valve, connect the valve so that it will be switched on and off
together with the pump.
The cooling water pressure must not exceed 6 bar.
In order to ensure long trouble-free operation the cooling water must not
contain any oils, greases and suspended solids. Moreover, we recommend
compliance with the following limit values:
Appearance Clear, free of oils and greases
Suspended matter < 250 mg/l
Particle size < 150 µm
Electrical conductivity < 700 µS/cm
pH value 7.0 to 9.0
Total hardness (total alkaline earths) < 8 °dH
Aggressive carbon dioxide None, not detectable
Chloride < 100 mg/l
Sulphates < 150 mg/l
Nitrate ≤ 50 mg/l
Iron < 0.2 mg/l
Manganese < 0.1 mg/l
Ammonium < 1.0 mg/l
Free chlorine < 0.2 mg/l
8 °dH (degrees German hardness) = 1.4mmol/l
= 10 °e (degrees English hardness)
= 14 °f (degrees French hardness)
If there is the danger of frost, you may use a water glycol mixture of up to 30 %.
DS water can be used for cooling the pump, if the pH value corresponds to the
range indicated above.
Fig. 3.8 Cooling water block of the
TURBOVAC 90/250/350/450 i
hose connection for
6x1 hose
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