Beckhoff AL8000 Operating Instructions Manual page 91

Water cooling [+]
9.2.3
Cooling circuit design
9.2.3.1
Version: 1.7
Install cooling circuits as closed systems
Implement the cooling circuits as closed systems. The maximum
permissible pressure is 10 bar.
Non-compliance may result in pressure losses at the connection
points, and open cooling circuits can lead to soiling and microbial
contamination. This can result in damage to the machine or system
and loss of performance.
Cooling coil parts with additional cooling circuit
If necessary, install an additional cooling circuit to cool the coil
parts.
Grease, dirt residues or long-term deposits can hinder the flow of
coolant and block the cooling circuits. Pressure loss and loss of
performance can be the result.
Only use suitable coolant
Coolants are not included in the scope of delivery and cannot be
procured from BECKHOFF. Operate the motor only with an ap-
proved and suitable coolant. Consult your coolant manufacturer in
order to obtain a suitable coolant.
Non-compliance will result in damage to the motor. The use of un-
suitable coolants will lead to the forfeiture of the warranty and other
claims for damages.
Use of coolant with corrosion protection
Corrosion protection forms a protection layer on the cooling surface
and prevents deposits and corrosion. If you wish to exchange a
motor in the cooling system at some time, we recommend replacing
the coolant with corrosion protection. An old coolant cannot form an
adequate protective layer in future.
The table below contains important technical specifications for the
installation of the cooling circuit. Adhere to the specifications for flow
rate and pressure drop in order to achieve the continuous force. We
recommend monitoring the flow rates and the pressure. If an error
should occur, you can counteract and avoid the overheating of the
motor at an early stage.
Motor Continuous
power loss P
[W]
AL8041
AL8042 126
AL8043 169
AL8044 238
AL8045 298
AL8046 358
AL8048 458
All values valid for a temperature increase ΔT of 10 K
AL8000
Mechanical installation
AL804x
Flow rate Q
c
[l/min]
63 0.1
0.2
0.2
0.3
0.4
0.5
0.7
Pressure drop
Δp
[bar]
0.00
0.01
0.03
0.05
0.08
0.10
0.16
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