Instruction book
5.5 Adjustment of MDR3 pressure switch (Figs. 5.7 and 5.8)
The switch allows the operator to select the stopping pressure and the pressure difference between
stopping and starting pressures. The stopping and starting pressures are the opening and closing
pressures of the switch.
The stopping pressure is controlled by adjusting screw (2). Turn the screw clockwise to raise the stopping
pressure, anti-clockwise to lower it.
The pressure difference between starting and stopping is adjusted by means of adjusting screw (3). The
adjustment range is given in Fig. 5.8. Turn the screw anti-clockwise to reduce the pressure difference,
clockwise to increase it.
1 Dial, overload relay
2 Adjusting screw, stopping pressure
3 Adjusting screw, pressure difference
4 On/off
switch
Figs. 5.7 Air pressure switch MDR3 with ON/OFF switch (30 bar units)
6
10
14
18
22
26
10 14 18 22 26
30
30 34
52831D
STOPPING PRESSURE (2)
bar(e)
S
TAR
T
IN
G
PRE
SS
URE
(1
)
bar(e)
(1) Starting
pressure
(2) Stopping
pressure
Figs. 5.8 Pressure difference diagram, MDR3 30 bar
2920 1585 00
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