5 | Installation
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5.2.3 Cooling Water Connection (Optional)
Water-oil heat exchanger with inlet and outlet connection
WF
CWI CWO
MV
WHE
TV
CF
CF Cooling fan CWI Cooling water inlet
CWO Cooling water outlet MV Solenoid valve
TV Thermostatic valve WF Water filter
WHE Water-oil heat exchanger
The thermostatic valve (TV) is used to control the oil flow in order to keep a stable ma-
chine temperature.
The factory adjustment of the thermostatic valve (TV) is approx. 55°C-70°C oil tempera-
ture.
The solenoid valve (MV) is used to stop the cooling water circulation when the machine
is not running or when the oil temperature is lower than 60°C.
The cooling fan (CF) removes warm air from the acoustic cabinet when it is required.
• Connect the cooling water connections (CWI / CWO) to the water supply.
Connection size:
– R1/2 (CWI / CWO)
• In case of retrofit of a Water-oil Heat recovery unit:
– Electrically connect the solenoid valve (MV) to the control unit (CU): connection ter-
minals X1-5, X1-0V and X1-PE (see wiring diagram T511205926 in the control unit
cabinet).
– Change the cooling system type in the “Advanced settings” menu of the User Inter-
face, refer to the specific document "Pump Control Instructions, art. no.:
0870213261". This parameter is only available for “Role 3” people, see Role and
User [►12].
• Make sure that the cooling water complies with the following requirements:
Min. supply capacity l/min 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:
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