User manual

I
GB
THINGS YOU SHOULD KNOW
To avoid overheating of the electric motor, this compressor is designed for intermittent
operation as indicated on the technical dataplate (for example, S3-25 means 2.5 minutes ON,
7.5 minutes OFF).
In the case of overheating, the thermal cutout of the motor trips, automatically cutting off the power when
the temperature is too high. The motor restarts automatically when normal temperature conditions are
restored.
On certain «V» type versions, the reset button on the terminal box of the motor must be pressed (g. 2).
To facilitate restart of the compressor, in addition to the operations indicated, it is important to return the
button of the pressure switch to the OFF position and then to ON again (gures 3-4-5).
On three-phase versions, simply return the button of the pressure switch to the ON position. (g. 4).
Single-phase versions are tted with a pressure switch equipped with a delayed closing air discharge valve
which facilitates start-up of the motor. Therefore venting of air from this valve for a few seconds with the
receiver empty is normal.
All the compressors are tted with a safety valve that is tripped in the case of malfunctioning of the pressure
switch in order to assure machine safety.
When tting a tool, the ow of air in output must be switched off.
When using compressed air, you must know and comply with the safety precautions to be adopted for each
type of application (ination, pneumatic tools, painting, washing with water-based detergents only, etc.).
START-UP AND USE
Fit the wheels and foot (or the suckers according to model) following the instructions provided in the
packaging.
Check that the rating data match the effective characteristics of the system (voltage and power).
Insert the plug of the power cable in a suitable socket (g. 6) checking that the button of the pressure switch
located on the compressor is in the OFF «O» position.
For lubricated models, check the oil level using the rod included in the oil fuel plug (gures 7a-7b-7c) or the
sight glass (g. 7d), and if necessary top up.
At this point, the compressor is ready for use.
Operating on the switch of the pressure switch (g. 4), the compressor starts, pumping air into the receiver
through the delivery pipe.
When the upper calibration value (set by the manufacturer) has been reached, the compressor stops, venting
the excess air present in the head and in the delivery pipe through a valve located under the pressure
switch.
This facilitates subsequent restart due to the absence of pressure in the head. When air is used, the compressor
restarts automatically when the lower calibration value is reached (2 bar between upper and lower).
The pressure in the receiver can be checked on the gauge provided (g. 8).
The compressor continues to operate according to this automatic cycle until the switch of the pressure switch
is turned.
Always wait at least 10 seconds from when the compressor has been switched off before restarting this.
All compressors are tted with a pressure reducer. Operating on the knob with the tap open (pulling it up
and turning it in a clockwise direction to increase the pressure and in a counterclockwise direction to reduce
this g. 9a), air pressure can be regulated so as to optimize use of pneumatic tools. After setting the value
required, push the knob to fasten this (g. 9b). On some versions, the ring-nut underneath must be tightened
to fasten the knob (gures 9c, 9d).
The value set can be checked on the gauge (for versions on which this is tted) or checking the numbered
notches on the knob whose values correspond to the related pressures.
Always pull out the plug and drain the receiver once you have completed your work (gures 10, 11).
CTD2002-Versione INGLESE.indd 21/11/2002, 17.549