Operating requirements
Instruction handbook b maXX BM4400, BM4600, BM4700
Document No.: 5.12008.07 Baumüller Nürnberg GmbH
62
of 358
3.3
3)
Rated flow = 10 l/min
If you have other cooling water flow rates than the ones, which were mentioned ab
ove, please contact Baumüller Nürnberg GmbH.
The cooling water must meet the following requirements:
pH-value 6.5... 9.5 Manganese (Mn) < 0.05 ppm
Conductivity 50... 600 µS/cm Copper (Cu) < 0.1 ppm
Water hardness (inclusive CaCO
3
) < 100 ppm Chlorine (Cl
2
) < 1 ppm
Suspended matters < 10 ppm Chloride (Cl
-
) < 500 ppm
Particle size < 100 µm Sulfate (SO
2-
4
) < 500 ppm
Ryznar Stability Index (RSI) 5.0 ... 6.0
The corrosion-resistant compared with further materials you
can take from the DECHEMA-material tables.
Use a corrosion-resistant and a closed
cooling circuit.
4)
In case you refer to UL508C: max. 3 bar. There must be a pressure-relief valve with a threshold pressure of maximum 6 bar in the cool-
ing circulation
5)
Recommendation:
In order to avoid dew, the temperature of the water inlet is greater or equal to the interior temperature of the device.
With other cooling water temperatures as mentioned ab
ove please contact Baumüller Nürnberg.
6)
Notes referring to Cold Plate
Cold Plate is an particularly efficient cooling versio
n. Heat dissipation is made via two contact surfaces. One is in the control cabinet as
a mounting platform or at the machine base. The other one is a Cold plate on the rear of the unit. In order to have an optimum heat flow,
there are high demands to this functional surface referring to the surface roughness and the evenness. A light damage of the surface
can lead to a significant deterioration of the heat dissipation to the mounting plate.
The sensitive functional surface therefore must
be protected against damage when handling the parts.
7)
At BM44XX - FXX, BM44XX - ZXX, BM46XX - FXX -0XXXX, BM46XX - FXX - 3XXXX and BM47XX - FXX - 3XXXX, only
NOTE!
Instead of a continuous flow of the water coolers, it is possible to operate with a tem-
perature-controlled, switched water supply. In this case the customer must install a
control equipment, so that the flow of the water can be enabled or avoided. This con-
trol equipment must read and process the available value „heat sink temperature“ in
the controller. It is recommended to enable water flow, if 58 °C were reached. The
water flow also must be possible to be stopped if it reached 57 °C. The maximum per-
mitted hysteresis of 5 K. Therefore, the closing temperature can be set to 60 °C and
the opening temperature to 55 °C. It is advantageous to set the hysteresis lower, as
the controller is a free parameterizable 2-point controller. The integrated 2-point con-
troller can now directly access the variable „heat sink temperature“.
The temperature controlled, switched water supply is able to use water, which is sig-
nificantly colder. The 2-point hysteresis control of the heat sink temperature avoids
impermissible condensation. This way, more power can be emitted via the heat sink.
This is advantageous, if water-cooled devices are used, which have an additionally
integrated brake resistor (see ZAdditional data referring to water-cooled brake resis-
tors– from page 106).
Contact the local Baumüller office for support concerning configuration of alternative
cooling water temperature control.
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