1
2
3
2.3
2.2
2.4
2.1
3.1
EN
10
12. Instrument unit
The compressor is fi tted with an instrument unit as standard (pictures
1
and
2
. This consists of:
2.1
pressure switch
2.2
safety valve
2.3
compressed air supply
2.4
manometer
The fl exible delivery hose must be pushed onto a pipe connection and
secured against slippage using hose clips.
i
The fl exible delivery hose connecting the permanently ins-
talled compressed air pipe and the compressor prevents the
transfer of vibrations and noise.
13. Electrical connections
Connections to the mains supply may only be made by a qualifi ed
electrician. It must be ensured that the electrical wiring and the mains
voltage is conform with the data indicated on the type plate. A tolerance of
+/- 5% is permissible. Earthing must always be used for safety purposes.
3
The compressors must be connected to a socket which is protected
by a suitable magnetothermal switch. The socket must be easily accessible
so that the appliance can be unplugged easily from the mains supply in
the event of danger. When a compressor which is operated by three-
phase alternating current is switched on for the fi rst time, it is necessary
to ensure that the direction of rotation of the ventilation rotor is correct
(see arrow on housing
3.1
).
If any electrical wires or air hoses are damaged, they must
be immediately replaced! The electrical wiring may not
touch the surfaces of the apparatus since the outer surfaces
of the compressor become hot during operation and may
thereby damage the cable insulation!
Instrument unit
Electrical connections
Practice personnel, technicians
