1.2. Time chart
During ordinary operation
Gas cooler fan 1, 2
5 sec
6 sec
Start condition established.
52X
Signal
0 pulse
Ordinary control
Initial aperture
105 sec
0 pulse
30 sec
Low pressure cut
Restart conditions established.
Ordinary control
SVHG1
Solenoid valve for
hot gas bypass
60 sec
60 sec
Compressor speed
0 rps
Ordinary control
Initial speed 40 rps
105 sec
0 rps
3 min.
Stop aperture (full open)
Initial aperture
Ordinary control
45 sec
120 sec
Stop aperture (full open)
45 sec
Oil level switch (OLS1-2)
ON at low oil level
Controlled at, or above, the
specified value of discharge
temperature.
OFF
ON
Stop
Operation
OFF
ON
OFF
ON
OFF
ON
OFF
ON
EEV-SC
EEV for subcooling coil
EEV-LB1
EEV for liquid bypass
EEVG
EEV for middle pressure
receiver inlet
SV-OIL1-2
Solenoid valve for
oil return
SV-INJ1
Solenoid valve for
middle pressure suction
Ordinary control
HP control
User Guide | Optyma™ iCO2
© Danfoss | Climate Solutions | 2023.01 | LCA012A030
BC408445719305en-000101 | 13