11 Adjustment options
11.1 Adjusting the pressure switch
WARNING
Risk of explosion of the pressure ves-
sel
The pressure vessels used in the com-
pressors are designed to withstand
continuous pressure changes of 2 bar
and can be used continuously under
these pressure changes.
❯
For load changes > 2 bar (max. per-
missible: 3 bar), comply with the maxi-
mum load change cycles specified in
the operating instructions of the pres-
sure vessel.
DANGER
Exposed live parts
Risk of electric shock due to live parts
❯
Disconnect all power from the device.
❯
Use insulated tools.
❯
Do not touch live parts.
The cut-off pressure must be at least 0.5
bar (0.05 hPa) below the maximum pres-
sure of 10 bar (1 hPa) of the safety valve.
Otherwise the safety valve can open too
early, which will prevent the compressor
unit from attaining the cut-off pressure, as
a result of which it will run continuously.
The maximum permitted pressure is
marked by a red line on the attached
pressure gauge.
If the read-off values differ from the factory set-
tings or if other settings are required, the cut-off
pressure of the compressor can be adjusted at
the adjusting screw on the pressure switch. The
start-up pressure can then be adjusted using the
pressure difference Δp.
❯
Take off the pressure switch cover.
❯
Adjust the cut-off pressure P at the adjustment
screw.
The cut-off pressure increases in the "+" arrow
direction and decreases in the "-" arrow direc-
tion. The pressure difference ∆p is also influ-
enced by this adjustment.
❯
Adjust the start-up pressure via the pressure
difference ∆p at the adjustment screw.
The pressure difference increases in the "+"
arrow direction and decreases in the "-" arrow
direction.
The maximum permissible pressure difference
must not be set to more than 3 bar.
11.2 Adjusting the motor protec-
tion switch
Pressure switch
❯
Take off the pressure switch cover.
❯
Adjust the motor protection switch with the
adjustment screw to the measured value
(observe the range between the MIN permissi-
ble setting and the MAX permissible setting of
the motor protection switch, see "4 Technical
data").
Assembly
30
5152100003L02 1910V001
EN
