English
70040-120_00-_
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Example of Electric connections
The unit must be electrically connected by the customer
Picture 5
– Electric connection
Please Note
:
When units are provided without power and alarm cables (or industrial connectors), cable on terminal blocks into the
electrical box, according to the e-plan enclosed with the unit
Electrical installation must respect all valid safety standards.
It’s necesary to install protective fuses (indicated on the electrical plan) or a circuit breaker upstream of the power
cable.
Make sure the system is adequately earthed.
Check that the voltage and frequency of the power supply correspond to the specifications on the unit’s data plate
and/or
enclosed electrical plan
.
Pfannenberg Chiller units are designed for TN Earthing Systems. Use the Maximum fault loop Chiller Impedence value
for sizing purposes on site (refer to Zpe value specified within Electrical Diagram attached)
For units with (black) control main switch, emergency switch-disconnector (in accordance with IEC 60947-1, IEC
60947-2, IEC 60947-3) will be provided by customer in proximity of the unit
CAUTION:
In case units that can work with different voltages (460V), connect the transformer of the
auxiliary circuit located inside the e-box in the right way.
Picture 6 - Unit CE: Factory setting 400/3/50
