Additional Electrical Connections - Lauda UC 2 Operation Manual

3.8 ADDITIONAL ELECTRICAL CONNECTIONS

The chiller also has some special terminals prepared for the following functions (introduce the required cables
also through the brush gland on the right side or the base of the chiller depending on the model):
Terminals 23 and 24, remote On/Off operation: This chiller can be turned On and Off automatically by an
external signal. This remote On/Off signal is transmitted to these terminals by a dry contact in the application
(open contact = chiller Off, closed contact= chiller On).
Note: The chiller will not turn On unless these terminals are bridged. Once the commissioning operation is
complete, if the remote On/Off function described above is not used, connect the supplied wire bridge
between terminals 23 and 24 to be able to turn the chiller On from the display.
Terminals 57 and 61, external alarm report signal: These terminals provide a dry contact to report a general
alarm of the chiller. By default this contact closes when there is an active alarm.
A system of fuses or circuit breakers must be installed before the power inlet connection to the Ultracool
unit. The maximum size of these protections is defined in the Ultracool characteristics plate.
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