5 | Installation
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The thermostatic valve (TV) is used to control the water flow in order to keep a stable
machine temperature.
The factory default adjustment of the thermostatic valve (TV) is set in position 2 (approx.
75°C oil temperature).
The pressure switch (PS) is used to monitor the presence of water at the cooling system
of the machine.
When the pressure switch detects a pressure lower than 2 bar, the machine must be
stopped.
The water bypass valve (WBV) is used at the first machine start-up. At that moment it
should be open (approx. 90 seconds) to prime the water heat exchanger, afterwards it
should be closed.
• Connect the cooling water connections (CWI / CWO) to the water supply.
Connection size:
– 19 mm hose (CWI / CWO)
• If necessary, electrically connect the pressure switch (PS), see Wiring Diagram Pres-
sure Switch of Water-oil Heat Exchanger (Optional) [►21].
• Make sure that the cooling water complies with the following requirements:
Min. supply capacity l/min 2.5
Water pressure bar 2 ... 6
Supply temperature °C +5 ... +35
Required pressure differential across supply
and return
bar ≥ 1
• To reduce the maintenance effort and ensure a long product lifetime we recommend
the following cooling water quality:
Hardness mg/l (ppm) < 90
Properties Clean & clear
PH value 7 ... 8
Particle size µm < 200
Chloride mg/l < 100
Electrical conductivity µS/cm ≤ 100
Free chloride mg/l < 0.3
Materials in contact with the cooling water Stainless steel, copper and cast iron
NOTE
Water hardness unit conversion.
1 mg/l (ppm) = 0.056 °dh (german degree) = 0.07 °e (english degree) = 0.1 °fH (french
degree)
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