Fig. 59 Combined operation
Fig. 60 Combination pressure
Instruction Manual w VERTICUS 5 Compressor Units
A-57
Combined operation
The combi page (Fig. 59) defines the status of the
compressor in a combined installation. The controller can
be declared as master or as slave. A master compressor
controls the whole combined installation; a slave
compressor is controlled by the master. No further settings
are necessary if the controller is set to „slave“. When
„master“ has been selected, the following parameters have
to be set:
Slaves active: number of compressors connected to the
master via a CAN-bus (only with appropriate control
system: B-Control II or B-Control extended). All active slave
compressors of the combination have to be set to Slave.
Refer to the instruction manual of the compressor.
Slaves passive: number of compressors controlled from
the master via switch-on and -off contacts.
Cycle time: defines the runtime (in hours) of the
compressors. Based load compressor and peak-load
compressors will be switched when the defined runtime is
over.
Loadequalisation: Select yes or no to enable or
respectively to deactivate the operating hours
loadequalisation. This effects that the compressor runtime
will be compared and a balanced working load will be
reached. The loadequalisation is automatically deactivated
as soon as the installation contains one or more passive
slaves.
Combi P-Set: Press the Combi P-Set button to open the
pressure settings page for the combined installation
(Fig. 60).
The Combi P-Set page enables to set start and stop
pressures for the based load compressor and the peak-load
compressors. Once the cycle time is over, the operating
hours of all compressors are compared and the compressor
with the lowest number of operating hours is declared as
based load compressor, the compressor with the highest
number of operating hours as last peak-load compressor.
In order to ensure a balanced load of all compressors, the
combined pressure must be set so that the resulting running
time for the based load compressor is higher than the
running time of the 1st. peak load compressor. This in turn
must be higher than the running time of the 2nd. peak load
compressor, and so on. Consequently under normal
conditions the start pressure of the based load compressor
("Compressor start at ...“) must be higher than the start
pressure of the 1st. peak load compressor. In the same way,
the start pressure of the 1st. peak load compressor must be
higher than the start pressure of the 2nd. peak load
compressor, and so on.
With correct configuration, the operating hours of all
compressors (see Chap. 11.4.6.) will increase equally.
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