Connecting The Chiller To The Power Supply - Pfannenberg EB 210 Operating And Maintenance Instructions Manual

EN

5.6 Connecting the chiller to the power supply

DANGER
Life-threatening danger due to electric shock
Live units and exposed connection cables can generate an electric shock and cause severe accidents.
Work on electrical connections must be carried out exclusively by trained, qualified electricians.
Before assembly, de-energize all supply lines to the separate fuse or a main switch, disconnect the system and
secure to prevent re-connection.
Test to ensure the absence of voltage on the unit and on all power supply cables.
Lightning protection of the unit (outdoor installation) must be carried out by qualified engineers.
NOTICE
Additional information
If units are provided without power and alarm cables (or industrial connectors), cable on terminal blocks into the
electrical box, according to the enclosed
Electrical installation must respect all valid safety standards.
It's necessary to install protective fuses (indicated on the electrical diagram) or a circuit breaker upstream of the
power cable.
Make sure the system is adequately earthed.
In case of outdoor installation it is strictly recommended to follow the local regulation for the proper protection of
the system (unit + piping) against lightnings.
Check that the voltage and frequency of the power supply correspond to the specifications on the unit's data
plate and/or enclosed
Pfannenberg chiller units are designed for TN Earthing Systems. Use the Maximum fault loop chiller Impedance
value for sizing purposes on site (refer to Zpe value specified within
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.
Check the correct sequence of electrical power: L1=R – L2=S – L3=T; unit provided by phase sequence
monitor will not start with wrong sequence; in this case an alarm on the sequence monitor device will occur.
In this condition change the position of supply conductors (leave all the internal wiring as it is).
CAUTION
Malfunction due to incorrect transformer setting
In case units that can work with different voltages (400 V
50 Hz or 460 V 60 Hz), connect the transformer of the
auxiliary circuit located inside the e-box in the right way.
NOTICE
Transformer factory setting
Unit CE: Factory setting 400/3/50
Unit UL: Factory setting 460/3/60
Operating and Maintenance Instructions - Chiller - Series EB 210 - EB 440
Electric
Electrical diagram.
diagram.
Electrical diagram attached)
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