BUSCH R5 Oxygen - Cooling Water Connection (Optional)

5 | Installation
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5.2.3 Cooling Water Connection (Optional)
Water-oil heat exchanger without inlet accessories
WHE CWO CWI
CWO TV PS
WBV WF CWIWHE
Water-oil heat exchanger with inlet accessories
CWI Cooling water inlet PS Pressure switch
CWO Cooling water outlet WBV Water bypass valve
WHE Water-oil heat exchanger WF Water filter
TV Thermostatic valve
The thermostatic valve (TV) is used to control the water flow in order to keep a stable
machine 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:
• If necessary, electrically connect the pressure switch (PS), see Wiring Diagram Pres-
sure Switch of Water-oil Heat Exchanger (Optional) [►17].
• 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