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Base load rotation with 2 running compressors (C1 + C2)
Base load rotation with 1 running compressor (C1 or C2)
Reduce speed to minimum value
Disconnect compressor from the mains power supply
Reduce speed to 0
Reduce speed to 0
3 seconds delay
3 seconds delay
Switch off speed controlled compressor
Switch off speed controlled compressor
6 seconds delay
6 seconds delay
Base load rotation
Base load rotation
3 seconds delay
3 seconds delay
With oil balancing: disable compressor at mains for idle time
Without oil balancing: switch on compressor at the mains power supply
Switch on speed controlled compressor
Switch on speed controlled compressor
Increase input signal (0..10 V) by 2 V/sec.
Increase input signal (0..10 V) by 2 V/sec.
If the cycle time for the base load rotation is specified as "-", no rotation is performed. The functioning of the oil
balancing is described in chapter
.
If there is any fault (motor overload cut-out or oil pressure switch) for the speed-controlled compressor (C1 or
C2), any base load rotation is only performed once on the still available fixed-speed compressors. No base load
rotation is performed if the compressor with the fault is on the mains power supply.
In order to switch over the FC compressor, the
last
compressor output of the corresponding expansion stage is
used in each case:
•
VS 3015 C in the basic configuration, output 4, terminals 43/44
•
Configuration with one SIOX extension module, output 8, terminals 72/73
•
Configuration with two SIOX extension modules, output 12, terminals 72/73
5.4.6 Load shedding
In order to prevent any defined energy consumption being exceeded, it may be necessary to initiate a forced
shutdown of consumers. 3 digital inputs are provided in the pack controller for the load shedding. The
compressors are switched off immediately.
The second stage of the spray system
cannot
be used when the system is operated with compressor
combined control. If all outputs are occupied for compressors, no base load rotation occurs.
Содержание VS 3015 C
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