EVCO c-pro nano RACK - Manual (Page 52)

C-PRO NANO RACK E C-PRO MICRO RACK APPLICATION MANUAL
Page 52
If the request for a shutdown remains, all the compressors are shut down, one by one, and at the end the value
of the inverter is brought to zero.
If the MinI parameter has been set, at every turn-on the inverter will keep that value as the starting value.
If the parameter for the speedUp time has been set, at every breakaway the inverter will assume the maximum
value for the seconds described by this parameter.
6.4 Management of the compressors
The program is able to manage up to a maximum of 4 compressors of equal power, divided into circuits and up
to 2 throttlings for each compressor. To each compressor, certain digital inputs for safety measures and digital
outputs for turn-on/shutdown and for potential throttlings may be associated.
The main configuration parameters are the following:
- PG01 = Circuit number
- PG11 = Number of compressors circuit 1
- PG15 = Number of compressors circuit 2
- PG04 = Number of throttlings
- PG05 = Activation of compressor safety measures
The management of the compressors occurs through a setPoint and a differential that can be set by a parameter
and the reading of a pressure on the suction probe. Turn-on/shutdown is ensured by a thermo-adjustment and by
certain timings that protect the various breakaways.
6.4.1 Rotation of the compressors
The rotation of the compressors is a procedure that makes it possible to balance as much as possible the number
of functioning hours and the number of breakaways for each compressor. The rotation only refers to the
compressors and not to the single throttlings, it does not involve potential compressors that have been subject to
Example: 4 compressors without inverter Example: 4 compressors with 1 inverter
Steps
4
Pressure
1
2
3
Out-band. Switching on
Steps
3
Pressure
1
2
Pressure
Inverter
100.00 %
Out-band. Switching on