1036100102L02 1904V002
25
Assembly
The maximum permissible pressure difference
must not be set to more than 3 bar.
Adjusting the motor protection switch
Pressure switch
i
Take off the pressure switch cover.
i
Adjust the motor protection switch to the
measured value using the setting screw (ob-
serve the range between the min. and max.
permissible settings of the motor protection
switch, see "4 Technical data").
9.5 Adjustment options
Adjusting the pressure switch
WARNING
Risk of explosion of the pressure
vessel
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.
i
For load changes > 2 bar (max. per-
missible: 3 bar), comply with the max-
imum 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
i
Disconnect all power from the device.
i
Use insulated tools.
i
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 continuous-
ly. 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.
i
Take off the pressure switch cover.
i
Adjust the cut-off pressure P at the adjust-
ment screw.
The cut-off pressure increases in the "+"
arrow direction and decreases in the "-" arrow
direction. The pressure difference ∆p is also
influenced by this adjustment.
i
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.
EN
Summary of Contents for H2A-160M
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