3.7 Working life of safety functions
The safety-relevant functions of the safety devices equipped with this machine are designed for a
working life of 20 years. The working life starts with the original machine commissioning, and is not
extended by times during which the machine was not in use.
The following functions are affected:
■ Resistance thermometer (Pt100 sensor for measuring the compression discharge temperature)
■ EMERGENCY STOP control device
■ Main contactor
1. The functions of the safety components must be replaced by an authorized KAESER service
representative after a working life of 20 years.
2. Have an authorized KAESER service representative check the reliability of the safety func‐
tions.
3.8 Safety signs
The diagram shows the positions of safety signs on the machine. The table lists the various safety
signs used and their meanings.
Fig. 4 Location of safety signs
Item Symbol Meaning
9
Personal injury or damage to the machine by incorrect operation!
➤ Read and understand the operator manual and all safety signs before switching
on this machine.
Machine starts automatically!
Severe injury could result from rotating components, electrical voltage and air pres‐
sure.
➤ Switch off and lock out the power supply disconnecting device and check that
no voltage is present before opening any machine enclosure or guard.
3
Safety and Responsibility
3.7
Working life of safety functions
9_6917 34 USE
Operator Manual Screw Compressor
AIRTOWER 3C–7.5C Tri-Voltage
21