Fig. 14 Oil level monitor connections
1
Compressor block
2
Oil level monitor
Oil level monitoring and direct online starting
Oil level monitoring and star-delta starting
Machines with direct online starting and an
under-voltage cut-out on the pressure switch
require additional control and connection
components.
1. Electrical connections to be made by the
user.
2. The machine is switched off by the pressure
switch.
Machines with star-delta starting require ad‐
ditional control and connection parts and an
external control unit. The oil level monitor
must be linked with the external controller so
that the machine is shut down if oil falls below
the set minimum level.
1. The user is to make the connection to the
power supply or the connection to an external
control unit.
2. The machine is switched off by the external
controller.
6.7.1.1 Float switch
The float switch has been set at the factory as follows:
■ The machine shuts down when the oil falls to its minimum permissible level.
■ The tip of the red arrow is visible for 2 mm.
➤ Check the setting and adjust, if required.
6.7.1.2 Adjusting the setting
Adjust the switching point by moving the sensing contact slightly along an arrow.
You may fine-adjust the switching point to the length of the arrow.
■ Moving towards the arrow head lowers the oil level point at which the sensor triggers.
■ Moving away from the arrow head raises the oil level point at which the sensor triggers.
6
Installation
6.7
Options
36
Assembly and operating manual 2-stage piston compressor
EPC-2-G
No.: 9_5753_04 E
