Michelin MB2420 Manual De Uso página 13

pressure inside the tank drops to 6 bar (87 psi). After connecting the
compressor to the power line, load it to maximum pressure and check
exactly how the machine is operating.
When the temperature is <10 ° C it is recommended to make the
first start with the tank unloaded (0 bar); it is recommended to
depressurize the tank again, in case the compressor has stopped at
low temperature within 30 minutes from the first start up.
NOTE: The head/cylinder/delivery tube unit can reach high
temperatures. Take care when working near these parts, and do not
touch them to avoid possible burns (fig.17).
IMPORTANT
The electro-compressors must be connected to a power socket
protected by a suitable differential switch (thermal-breaker). The
motor of compressors is equipped with an automatic thermal breaker
located inside the winding – this stops the compressor when motor
temperature reaches excessively high values. If the breaker is tripped,
the compressors restarts automatically after 10 to 15 minutes.
The same instructions apply to compressors powered at 60 Hz.
ADJUSTING OPERATING PRESSURE (fig. 14)
You do not have to use the maximum operating pressure at all
times. On the contrary, the pneumatic tool being used often requires
less pressure. On compressors supplied with a pressure reducer,
operating pressure must be correctly adjusted. Release the pressure
reducer knob by pulling it up, adjust pressure to the required value by
turning the knob clockwise to increase pressure and anti-clockwise to
reduce it. When you have obtained optimum pressure, lock the knob
by pressing it downward. For pressure reducers equipped without
a pressure gauge, the set pressure can be seen on the graduated
scale located on the reducer body. On pressure reducers equipped
with a pressure gauge, pressure can be seen on the gauge itself.
WARNING: Some pressure regulators do not have "push to lock",
therefore simply turn the knob to adjust the pressure.
MAINTENANCE
Before attempting any maintenance jobs on the compressor, make
sure of the following:
– Master power switch in position "0".
– Pressure switch and the control unit switches all off, in position "0".
– No pressure in the air tank.
Every 50 hours of duty: we advise you to dismantle the suction filter
and clean the filtering element by blowing compressed air on it (fig.
13). You are recommended to replace the filter element at least
once if the compressor operates in a clean environment, but more
frequently if in a dusty environment.
The compressor generates condensate water which accumulates in
the tank. The condensate in the tank must be drained at least once
a week, by opening the drain tap (fig.12) under the tank. Take care
if there is compressed air inside the cylinder, and water could flow
out with considerable force. Recommended pressure: 1 ÷ 2 bar
max. Condensate of compressors that are oil lubricated must not be
drained into the sewer or dispersed in the environment as it contains
oil.
OIL CHANGES – TOPPING UP WITH OIL
The compressor is filled with oil "GSP High-Performance". We
recommend a full change of oil in the pumping element within the first
100 hours of duty.
Unscrew the oil drain plug on the housing cover, allow all the oil to
flow out, and re-screw the plug. Pour oil into the upper hole of the
housing cover until it reaches the correct level showed on the dipstick
or by oil level light (fig.13).
Once a week check oil level of the pumping element and see if it
needs topping up.
For operation at ambient temperature in the range -5°C to +40°C, use
synthetic oil. The advantage of this oil is that is does not lose
its characteristics either in winter or summer. Do not drain used oil
into the sewer or dispose of it in the environment.
OBSERVE THIS TABLE FOR OIL CHANGES
TYPE OF OIL
GSP High-Performance..........................................500
AGIP Sint 2000 Evolution - BP Visco 5000 - ESSO Ultron
-MOBIL Mobil 1 - NILS Dimension S - NUOVA STILMOIL
Arrow5W50)............................................400
Other types of oil: mineral multigrade
SAE 15 W40...........................................100
WHAT TO DO IF SMALL MALFUNCTIONS OCCUR
Loss of air in valve under pressure switch
This trouble depends on poor tightness of the check valve – take the
following action (fig. 16):
– Discharge all pressure from the tank
- Unscrew the hexagon-head of the valve (A)
- Carefully clean both the rubber disk (B) and its seat.
- Refit all parts accurately.
Air losses
These can be caused by poor tightness of a union – check all unions,
wetting them with soapy water.
Compressor turns but does not load
- This may be due to failure of the valves or of a seal (fig.15): replace
the damaged part.
- Check if there is too much condensate water inside the tank.
Compressor no starting
If the compressor has trouble starting, check the following :
- Does mains power match that of the data-plate? (fig. 9)
- Are power cable extensions of adequate diameter or length?
- Is the work environment too cold? (under 0°C)
- Is there oil in the housing to ensure lubrication?
- Is power supplied to the electrical line (sockets well connected,
thermal- breaker, fuses in good condition).
Compressor not stopping
- If the compressor does not stop when maximum pressure is
reached, the tank safety valve comes into operation. To repair the
valve, contact your nearest service centre.
- Do not on any account unscrew any connection while the tank is
pressurised always check if the tank is pressure free.
- Do not drill holes, weld or purposely deform the compressed air
tank.
- Do not do any jobs on the compressor unless you have disconnected
the power plug.
- Temperature in operating ambient: 0°C +35°C.
- Do not aim jets of water or inflammable liquids on the compressor.
- Do not place inflammable objects near the compressor.
- During down-times, turn the pressure switch to position "0" (OFF).
- Never aim the air jet at people or animala.
- Do not transport the compressor while the tank is pressurised.
- Be careful with regard to some parts of the compressor such as the
head and delivery tubes, as they can reach high temperatures. Do not
touch these parts to avoid burns.(fig. 17)
- Transport the compressor, lifting or pulling it with the appropriate
grips or handles.
- Keep children and animals well away from the machine operating
area.
- If using the compressor for painting:
a) Do not work in closed environments or near to naked flames;
b) Make sure there is adequate exchange of air at the place of work;
c) Protect your nose and mouth with an appropriate mask. (fig. 35)
- If the electrical cable or plug are damaged, do not use the compressor
and contact an authorised service centre to replace the faulty element
with an original spare part.
- If the compressor is located on a shelf or on a top above floor height,
13
HOURS OF DUTY
Synthetic oil:
IMPORTANT
EN