Cooling Water Connection (Optional)
Water-oil heat exchanger without inlet accessories
Water-oil heat exchanger with inlet accessories
Description | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
CWI | Cooling water inlet | CWO | Cooling water outlet | ||||||||||||
PS | Pressure switch | TV | Thermostatic valve | ||||||||||||
WBV | Water bypass valve | WF | Water filter | ||||||||||||
WHE | Water-oil heat exchanger |
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 Pressure Switch of Water-oil Heat Exchanger (Optional).
- Make sure that the cooling water complies with the following requirements:
Min. supply capacity | l/min | 2.5 |
Water pressure | bar (g) | 2 ... 6 |
Supply temperature | °C | +5 ... +35 |
Required pressure differential across supply and return | bar |
|
- 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 |
|
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)