KKT chillers vBoxX 10, Instruction Manual

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8. Operation
The chiller is designed for fully automatic operation.
8.1. Switching on
First, switch on the unit by turning the main switch. The start screen appears on the display.
8.2. Selecting the operating mode
In the start screen you can choose between the following three switching commands:
 System standby
If the "System standby" switching command is selected, all electrical components are
switched off.
 System auto
If the "System auto" switching command is selected, the machine is ready for use.
Fully
automatic operation if the external release is configured as described in Chapter
8.3 External release and the floating contact is closed or the maintained operation range
is exceeded or is not reached.

System on
Select "System on" mode to start fully automatic operation (without external release).
8.3. External release
In its as-delivered condition the contact is bridged for external release. An external control cable
can be wired instead of the bridge. Please refer to
Chapter 6.2.18 Electrical installation for
information on installing the external release. Fully automatic operation starts with this external
release.
8.4. Control
The system is controlled by a PLC (programmable logic controller). This communicates with an
extension module and a controller for activating the inverter and the display. The controller for
activating the inverter includes the activation for the complete refrigeration circuit. The inverter
itself is used for optimised speed control of the compressor. All operationally relevant data is shown
on the display.