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1
PRECAUTIONS
B
THINGS TO DO
• The compressor must be used in suitable environments (well-ventilated,
with an ambient temperature between +5°C and +40°C).
• Always maintain a safety distance of at least 4 meters between the
compressor and the work area.
• The compressor must be placed horizontally on a stable surface to
guarantee correct functioning and correct lubrication.
• Before connecting the compressor, check that the mains voltage complies
with the electrical characteristics of the motor.
• Use extension cables with the maximum length of 5 meters and with
a suitable cross-section. Use of extensions of different length and also
adaptors and multiple-sockets should be avoided.
• To switch off the compressor always use the switch or the selector on the
control panel. Never switch off the compressor by pulling out the plug to
avoid restart with the head of the compressor pressurized (in versions not
equipped with electrovalves).
• Use suitable equipment to transport the compressor (e.g.: transpallets,
fork-lift trucks, etc.).
• Use of compressed air in the various possible applications (inflation, air-
powered tools, painting, washing, etc.) requires knowledge and compliance
with the respective regulations.
• Start the machine only after checking that all the guards have been
correctly fitted and that no-one can be injured, directly or indirectly, by
jets of air from pipes that may be pressurized without prior warning.
• Ventilate the work place in order to appropriate dilute the air discharged
into the environment.
• Please check that the air consumption and the maximum working
pressure of the pneumatic tool to be used are compatible with
the pressure set on the pressure regulator and with the amount
of air supplied by the compressor.
NOT
THINGS
TO DO
• Compressed air is an energy fluid and is therefore potentially dangerous.
Pipes containing compressed air must be suitably secured. In particular,
if not firmly fastened, rubber hoses may cause serious damage during
subsequent disorderly movement.
• Never direct the jet of air/liquid towards persons, animals or towards your
body.
• Never direct the jet of liquids sprayed by tools connected to the compressor
towards the compressor.
• Never use the appliance in your bare feet or with wet hands or feet.
• Never yank the power cable to pull out the plug from the outlet.
• Do not transport the compressor with the reservoir pressurized (for models
fitted with this).
• Do not weld or machine the compressor. In the case of faults or corrosion
of the reservoir, replace this completely.
• Do not allow inexpert persons to use the compressor without suitable
surveillance. Keep children and animals at a distance from the work area.
• Do not clean the machine with flammable liquids or solvents. Use only a
damp cloth making sure that you have disconnected the machine from the
power supply.
• Use of the compressor is closely linked to compression of the air. Never use
the machine for any other type of gas.
• The compressed air produced by this machine cannot be used in the
pharmaceutical, food or hospital sector except after particular treatments
and cannot be used to fill scuba diver bottles.
• Do not touch moving inside parts.
• Never leave the appliance exposed to dust, acids, vapors, explosive or
flammable gasses or atmospheric agents (rain, sun, fog, snow).
• Never place flammable or nylon and fabric objects close to or on the
compressor.
• Do not cover the air inlets of the compressor.
THINGS YOU SHOULD KNOW
• POWER SUPPLY
All machines, with both direct and Delta/Star start-up, are equipped for
400V/50Hz three-phase voltage, except for the B2800 single-phase, which is
designed for a voltage of 230V/50Hz.
The wiring diagrams are located inside the cabinet.
Preserve this handbook for future reference
• CONTROL PaNEL
The following are present on the 2 - 3 HP models:
On/Off switch, two gauges (one to read the pressure in the reservoir and one
for the operating pressure), hour-counter, pressure regulator (fig. 1).
The following are present on the 4 - 5,5 HP models (direct start-
up):
On/Off switch, delivery pressure gauge and hour-counter (fig. 2).
The following are present on the 5,5 HP models (D/S start-up):
On/Off selector, delivery pressure gauge, emergency stop button and hour-
counter + start button (tripping of the thermal cutout) (fig. 3).
The following are present on the 7,5 - 10 HP models:
Start button «I» and Stop button «O», «machine live» + «On-Off/Stand-by»
+ «Insufficient oil level» (for models that feature this) + «Thermal cut-out
tripped » + «Emergency stop tripped », readouts, Emergency stop button,
hour-counter and delivery pressure gauge (fig. 4).
• INTERMITTENT RaTIO
These compressors are designed to operate with an intermittent duty cycle
in order to avoid overheating of the electrical motor. An intermittent duty
cycle of 50%, for example 5 minutes in operation and 5 minutes stopped,
is recommended.
In the 7,5 - 10 HP versions, the «On-Off/Stand-by» light flashes when the
machine is in stand-by due to tripping of the pressure switch.
• TRIPPING OF THE THERMaL CUTOUT
In the case of excess power take-off by the electrical motor, the thermal
cut-out of the motor trips, automatically interrupting the power supply. In
this case, after tracing the causes for which the thermal cutout has tripped,
switch off the machine, disconnect this from the power supply in order to
avoid risks of electric shock and reset as described below.
In the single-phase versions (2 - 3 HP), the operator must intervene
manually, pressing the reset button located on the terminal strip box of the
motor (fig. 5).
In the case of direct start three-phase versions (2 - 3 - 4 - 5,5 HP), the
button of the pressure switch (inside the compressor for 2 - 3 HP, on the control
panel for 4 - 5,5 HP) must be returned to the ON position (fig. 6).
On the D/S start-up 5,5 HP and on all the 7,5 - 10 HP, the button of
the thermal cutout of the motor, located inside the electrical cabinet, must
be pressed (fig. 7).
• ELECTROVaLVE
All Delta/Star start-up models (from 5,5 to 10 HP) and models 2 - 3 HP
(direct start-up) are fitted with an electrovalve (fig. 8/a) that vents the
air from the head of the compressor and from THE delivery line, thereby
facilitating subsequent restart.
On all other versions, this task is carried out by the pressure switch.
• SaFETY VaLVE
All compressors are fitted with a safety valve that, in the case of irregular
functioning of the pressure switch, opens to prevent the pressure inside the
reservoir exceeding safety values.
All two-stage compressors (4 - 5,5 - 7,5 - 10 HP) are equipped with safety
valves also on the manifold of the pumping unit, on the small damping
reservoir and on the low and high pressure connection pipe. These are
tripped in the case of malfunctioning (fig. 8/b).
• FaN
On some models (7,5 - 10 HP), the compressor cooling system is combined
with an independent electric fan controlled by a thermostat that may remain
in operation or restart also following stopping of the compressor (fig. 8/c).
To stop the fan in order to carry out maintenance, disconnect
the machine from the power supply.
• EMERGENCY STOP BUTTON
All 7,5 - 10 HP models and the 5,5 HP D/S are equipped with a red
«mushroom» button. Pressing of this button causes emergency stopping of
the compressor (B, fig. 4). To reset the emergency and restart the machine,
turn the button in a clockwise direction until it clicks into the initial position:
at this point, the machine can be restarted.
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