Switching the machine to LOAD:
➤ Press the «Load» key.
■ The machine switches to LOAD mode and is ready to deliver compressed air.
■ The «Load» key illuminates.
If the «Load» key is pressed before the required ADT or ECT are attained, the engine contin‐
ues to run at IDLE speed. The controller switches automatically to LOAD when these temper‐
ature limits are reached.
Further information A representation of the operating sequence of the SIGMA CONTROL MOBIL is provided in the
separate operating manual for the controller.
8.2.4 Regulating the shut-off valve
To prevent users' devices from venting when the compressor shuts down and automatically vents,
a shut-off valve is installed in the control air line between oil separator tank and air distributor.
Fig. 37 Control line shut-off valve
1
Shut-off ball valve
I – Open
0 – Closed
2
Oil separator tank cover
3
Compressed air outlet distributor
1. Open the right-rear door.
2. Check that the shut-off valve in the control air line is open. If not, open it.
The machine is ready for operation.
3. Close the door.
8.2.5 Setting the compressed air discharge pressure
The compressed air discharge pressure is set from the instrument panel.
Setting is in increments of 0.1 psig and shown as a scale on the display.
8
Operation
8.2
Starting and stopping
No.: 9_9570 07 USE
Operator Manual Screw Compressor
M250 SIGMA CONTROL MOBIL
85