82
83
Starting-up
Working pressure adjustment
Maintenance
BE CAREFUL! Never use the ground connection instead of the neutral line. The ground
connection must be carried out in accordance with the accident prevention regulations
(EN 60204). The plug of the power cord must not be used as a switch but must be
connected to a socket controlled by a suitable differential switch (motor protection
switch). The magnetic starter must be selected according to the current consumption of
the machine (motor protection switch from 0 - 8A).
Check that the mains voltage corresponds to that indicated on
the electrical data plate (fig. 12), the permitted tolerance range
must be within ± 5%. Turn or press, according to the type of
pressure switch mounted on the machine, the button located
at the top to position "0". Connect the plug to the socket (fig.
11) and run the compressor by turning the pressure switch to
position "I" (ON). The operation of the compressor is
completely automatic, controlled by the pressure switch which
interrupts its operation when the pressure in the tank reaches
the maximum value and resets it when it drops to the minimum value.
In general, the pressure difference between the maximum value and the minimum value is
about 2 bar (29 psi). For example: the compressor stops when it reaches 8 bar (116 psi)
(maximum working pressure) and restarts automatically when the tank pressure has
dropped to 6 bar (87 psi). After connecting the compressor to the power line, carry out a
load at maximum pressure and check the correct operation of the machine.
NOTE: The head/cylinder/supply
tube unit can reach high
temperatures. Pay attention when
working near these parts and do
not touch them to prevent burns
(fig. 13 -14).
BE CAREFUL! The electric compressors must be
connected to an electric socket, protected by a
suitable circuit breaker (motor protection switch). The
motor of the EURO compressors is equipped with
automatic thermal cut-off placed inside the winding, in
order to prevent the compressor motor from reaching
too high temperature values. The compressor motor
will automatically restart after about 10 - 15 minutes.
The single-phase motors of the AB series compressors are
provided with a thermal overcurrent protector with manual
reset, placed on the outside of the terminal block cover.
When this thermal protection is activated, wait a few
minutes, then manually reset the thermal switch (fig. 15).
It is not always necessary to use the maximum working
pressure; in fact, most of the time the pneumatic equipment
used requires a lower pressure. For compressors equipped with
a pressure regulator, it is necessary to regulate the working
pressure correctly. Unlock the pressure regulator knob by pulling
it upwards, set the pressure to the desired value by turning the
knob clockwise to increase it and counterclockwise to decrease
it. After setting the optimum pressure, lock the button by
pressing down (fig. 16). In pressure regulators equipped with a
gauge, the calibration pressure is displayed on the gauge itself.
