Technical data

Ichill 200CX EVO rev 1.1 14/11/2013
Pag. 44 of 151
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.
20.1 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.
20.2 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.
21. COMPRESSOR INVERTER CONTROLLED
The signal 0÷10V is given by one of 4 configurable outputs of the Ichill (OUT1÷OUT4).
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 ON/OFF compressor (managed by relay)
• 2 circuits: 1 compressor inverter controlled per circuit
• 2 circuits: 1 compressor inverter controlled and maximum 2 ON/OFF 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.
To increase / decrease the power the compressor works by step of 1% of the power; every step is delayed
by CO62 at the start-up of the compressor and CO71 when the compressor works normally.
When the compressor inverter controlled is activated, it works at power configured by CO61 parameter for
CO60 seconds; after that:
• if the parameter CO62=0 the compressor modulates the power according to the regulation request