1592015820 User manual IC260_261L_D DUO FW1.9 rel. 1.0
Pag. 58 of 149
Out relay
Cap. step 2
OFF
Cap. step 2
OFF
Cap. step 2
ON
Cap. step 2
ON
Out relay
Cap. step
OFF
Cap. step
OFF
Cap. step 1
OFF
Cap. step 1
ON
Direct action with sequential step
Compressor
Cap.
step 1
Cap.
step
2
Cap.
step 3
Power
0 %
25 %
50 %
75 %
100 %
ATTENTION
When working with capacity control in sequential step in direct or reverse modes: if the power requested is
50% and 75% the unit turn on also the step 25% that must be enabled to make run the other two.
23.1 Minimum Load Start- Up
Par. CO07:
configuration of the start-up with minimum load.
This parameter allows to configure the first capacity step operation mode for alternative compressors and
screw compressors.
CO07=0
First capacity step is used only to start the compressor at the minimum load; the valve is switched on for
CO13 seconds, then it is switche off.
CO07=1
First capacity step is used as lower step of the regulation.
CO07=2
SCREW COMPRESSOR
First capacity step is used only to start the screw compressor at the minimum load; the valve is ON when the
compressor is OFF and it remains ON for CO13 seconds after the switching ON of the compressor.
CO07=3
SCREW COMPRESSOR
First capacity step is used as lower step of the regulation; when the compresor is OFF the valve is ON.
23.2 INTERMITTENT SOLENOID VALVE FOR SCREW COMPRESSOR
Some screw compressors have an intermittent solenoid valve; when the compressor is ON, this valve stays
CO08 ON and CO09 OFF.
24. COMPRESSOR INVERTER CONTROLLED
The signal 0÷10V is given by one of 4 configurable outputs of the Ichill (OUT3÷OUT6).
The compressor inverter controlled can be used only with proportional regulation (parameter St11=0).
Possible unit configuration:
1 circuit: 1 compressor inverter controlled
1 circuit: 1 compressor inverter controlled and maximum 2 compressor (managed by relay)
2 circuits: 1 compressor inverter controlled per circuit
2 circuits: 1 compressor inverter controlled and maximum 2 compressor (managed by relay) per
circuit
First step to be activated is always the compressor inverter controlled; it will be swiched on when the
regulation requests 100% of the compressor power.