3. Switch on the voltage. Lamp (H1) alights.
4. Rotate switch (Q1) to position I.
5. The motor starts and stops automatically depending on the air pressure.
6. On compressors equipped with a refrigerant dryer, the dew point of the refrigerant dryer will be
reached after a few minutes.
4.3 During operation
Procedure
1. Check the pressure gauge (Gp) on the control panel to check the pressure setting.
2. On compressors with a built-in refrigerant dryer, check also the temperature gauge (Gd) on the
control panel to check the dew point.
Check that condensate is discharged regularly by the automatic drain of the dryer. The amount of
condensate depends on the operating conditions of the unit and the humidity of the air.
Open the manual drain valve from time to time to remove eventual impurities (see also section
Preventive Maintenance schedule).
3. On receiver mounted compressors, open the manual drain valve of the air receiver regularly to
remove the water (specially in case of compressors without dryer). See also section Preventive
Maintenance schedule).
The dew point will deviate from nominal when the nominal conditions are exceeded. If
the dew point remains too high or unstable, consult section Problem solving.
4.4 Stopping
Control panel
Gp Pressure gauge Q1/H1 On/off switch with lamp
P1 Hour meter Gd Dew point gauge
Procedure
1. Rotate switch (Q1) to position O. The compressor stops.
2. Switch off the voltage.
3. Close air outlet valve (AV - see section Introduction).
The refrigerant air dryer and the air receiver remain under pressure. If it is necessary to
depressurize, open the manual drain valve(s).
Instruction book
2920 7110 11 25
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