1592015820 User manual IC260_261L_D DUO FW1.9 rel. 1.0
Pag. 55 of 149
Fig. 1
Part Winding
Each compressor needs two relay outputs:
Part Winding coil 1 of the compressor;
Part Winding coil 2 of the compressor.
The time delay between coil 1 and coil 2 activation is CO11 (decimal of second, in a range 0..5 seconds).
The maximum number of relay outputs is 8, this means 4 compressors managed with Part Winding start-up.
EXAMPLE
Part Winding configuration of the compressor relay outputs
Set the Par CF54 = c39 Part Winding coil 1 the compressor 1;
Set the Par CF55 = c40 Part Winding coil 2 of the compressor 1.
Compressor Start- up With Part Winding
First step: the Part winding coil 1 of the compressor 1 (relay K1 of fig2) is switched on
Second step: after the CO11 delay is turned on the Part winding coil 2 of the compressor 1 (relay K2 of fig2).
To turn off the compressor the two relay outputs are both turned off at the same time.
Fig 2
Part Winding start- up of Compressors or capacity compressors
If one or more capacity compressors are configured and the thermoregulation requires the full load start-up:
the controller turns the solenoid valve on, after 1 second the first motor part of the 1
st
compressor (relay K1
of Fig. 2) and then the complete control with the contactor K2. Durning the CO13 time delay the step valve is
forced on: minimum power. When the C013 is expired if the thermoregulation requires more power the valve
will be switched off (maximum power).
Star - Delta Start up
The Ichill manages maximum 2 compressor with star-delta start-up; each compressor needs three relay
outputs:
Line 1 of the compressor 1 (Relay K1 of the Fig.3).
Line 2 of the compressor 1 (Relay K3 of the Fig.3).
Centre of the star (Relay K2 of the Fig.3)
Compressor switching on:
the centre of the star relay is turned on (Relay K2 of the Fig.3), after 1 second the Line #1 relay is turned on
(relay K1 Fig.3). The two relays work together for the time set in CO11, then the relay of centre of the star is
