EVCO c-pro mega RACK - Manual (Page 75)

C-PRO MEGA RACK & C-PRO GIGA RACK APPLICATION MANUAL
Page 75
In the neutral zone, the inverter undergoes no changes and the compressors are neither switched on
or off.
In the on zone:
⋅
the inverter is activated as soon as requested.
⋅
the inverter value varies according to the time TI set by the parameter. This represents the
time required for the inverter ramp to change from the minimum value to the maximum
when the inverter reaches the maximum value another compressor is requested
⋅
on completion, the inverter value is reset to the minimum value (MinI if other than zero)
⋅
In the case where the on zone is still ongoing, the cycle is restarted once more.
If the on request remains ongoing, one or all of the compressors are switched on and the inverter
value finally reaches its maximum.
In the off zone:
⋅
as soon as requested, the inverter output is adjusted, according to TI, to the minimum value.
⋅
when the inverter reaches the minimum value, switching off another compressor is required
⋅
having completed the request, in the case where the off zone remains, the inverter value is
restored to the maximum value and the cycle restarted once more.
If the switch off request remains ongoing, one or all of the compressors are switched off and the
inverter value finally reaches zero.
In the case where the parameter MinI has been set, then with each switching on, the inverter will
maintain that value as the starting value.
Where the speedUp time parameter is greater than zero, the inverter assumes the maximum value
for the time in seconds described by said parameter, each time the regulation switches from the
neutral zone to the switch on zone.
6.4 Compressor management
The program is capable of managing up to a maximum of 12 compressors (8 if a C-PRO MEGA is
used) of equal, or different nominal power, divided over three circuits; in the case of equal nominal
power, it is also possible to manage up to 3 increment devices per compressor. The safety device
Example: 4 compressors w/o inverter Example: 4 compressors with 1 inverter
Steps
4
Pressure
1
2
3
Out of range. Switching on
Steps
3
Pressure
1
2
Pressure
Inverter
100.00 %
Out of range. Switching
on