Product Manual

2022 2096 26 41
Instruction book
Adjustment
•
Adjust the air pressure switch while it is pressurized.
•
Switch off the voltage before removing the cover of the switch; reinstall it after
an
adjustment has been made and before the voltage is switched on again.
The maximum pressure is controlled by adjusting screw (4). Turn the screw clockwise to raise the maximum
or stopping pressure, counter-clockwise to lower it.
The pressure difference is adjusted by means of screw (5). To reduce the difference between the stopping and
starting pressures, i.e. to increase the starting pressure, turn the screw counter-clockwise. To increase the
pressure difference, turn the screw clockwise.
6.3 Adjustment of MDR3 pressure switch
Views of air pressure switch MDR3 with ON/OFF switch
This pressure switch has a cover with rotary knob (4) for manual On/Off (Auto/Off).
Reference
Description
1 Dial, overload relay
2 Adjusting screw, stopping pressure
3 Adjusting screw, pressure difference
4 On/off switch (Auto/Off)
Function
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.