After completing the preparation the compressor is ready to operate.
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IMPORTANT
1.
The motors on these compressors are 3HP/230V and at normal mains voltage will start within the capacity of a 13 amp fused circuit.
Certain local conditions relating to electrical supply in the UK can result in the voltage varying between a low of 216 volts and a
high of 253 volts. At such times of fluctuating voltage the 13 amp fuse in the compressor plug may blow. This is normal and
is not a fault with the compressor. However if it happens regularly we recommend that you consult an electrician with a view
to installing a 30 amp supply, with contact breaker, to avoid the inconvenience of frequent fuse replacement.
WARNING! Extension lead MUST NOT be used to connect compressor to the mains as the resulting voltage drop would
reduce motor output, and pump performance causing the 13Amp fuse to blow.
2.
Take care when selecting tools for use with the compressor. Air tool manufacturers normally express the volume of air
required to operate a tool in cubic feet per minute (cfm). This refers to free air delivered by the compressor (air out) which
varies according to the pressure setting. Do not confuse this with the compressor displacement which is the air taken in by
the compressor (air in). Air out is always less than air in - due to losses within the compressor - and so it is important that,
before choosing equipment, you study the Free Air Delivery figures shown in the Specification chart, section 2.
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WARNING!
Ensure that you have read, understood and apply section 1 safety instructions.
4.1.
Make sure the main switch (fig.4.A) is in position "O, off.
4.2.
Plug the mains lead into mains supply and start the compressor by turning the main switch to I, on.
4.3.
When starting compressor for the first time, leave it running with air outlet closed and reducer
(fig.5.A) set to maximum. Make sure that pressure in tank rises and that compressor stops automatically
when max. pressure value allowed - written on plate and shown on gauge (fig.4) - is achieved.
Note: SA2115/3 and SA2120/3 are not supplied with an integral pressure regulator.
The compressor will now operate automatically. The pressure switch stops the motor when the maximum
tank pressure is reached and restarts it when pressure falls below the minimum threshold - approx. 2 bar
(29psi) less than the maximum pressure.
4.4.
Stop the compressor by turning the main switch off (fig.4). The compressed air inside the compressor
head will flow out, making the restart easier and preventing the motor from being damaged.
DO NOT,
other than in an emergency
,
stop the compressor by switching off the mains socket, or by pulling the plug out, as the pressure
relief will not then occur and motor damage may result upon restart.
When the compressor runs correctly and is stopped correctly there will be:
(a) a whistle of compressed air when the motor stops,
(b) a protracted whistle (about 20-25 seconds) when the compressor starts with no pressure in the tank.
4.5.
The compressor is equipped with an overload cut-out to protect the motor. The manual reset D (fig.6) should not
be operated until 3 minutes after cut-out, to allow the motor to cool. To restart, turn main switch off, reset D and
then turn main switch on. If, after restarting, the compressor again automatically cuts out turn off at the main switch
and contact Service Agent.
4.6.
SA2110/3 - The output pressure is regulated by the pressure reducer (fig.5.A). Lift and turn the knob clockwise to increase pressure and
anticlockwise to reduce it - push knob down to lock in required position. The gauge (fig.5) will show the output pressure. To determine
the correct working pressure for any piece of equipment check the corresponding manual.
When the compressor is not being used set the regulated pressure to zero so as to avoid damaging the pressure reducer.
NOTE:
a) If the motor does not cut in and out, but runs continuously when using an air tool, the capacity of the compressor may be too small.
b) The gauge B (fig.4) indicates the pressure inside the main tank, NOT the pressure supplied to the air equipment. Should the
pressure in the main tank exceed the pre-set switch C maximum, a safety valve D will activate.
WARNING!
for this reason DO
NOT tamper with or adjust the switch or safety valve.
4. OPERATION
In order to keep the compressor in good working condition, periodic maintenance is essential.
IMPORTANT! Failure to carry out maintenance tasks may invalidate the warranty on your compressor.
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WARNING! Before performing any maintenance operation, switch off compressor, disconnect from power supply and vent air from tank.
5.1.
Operations to be carried out
after the first 50 working hours:
a) Check that all bolts/nuts are tight, particularly those retaining the crank case and cylinder head.
b) Replace the lubricating oil - see para 5.6.
5.2.
Operation to be carried out daily:
a) Drain condensation by opening the valve C located under the tank.
5.3.
Operations to be carried out monthly (or more frequently, if the compressor operates in a very dusty atmosphere):
a) Check oil level and, if necessary, top up.
b) Remove the filter element (fig.2) and clean by blowing through, with an air line at low pressure, from
the clean side. Do not operate compressor without filter as foreign bodies or dust could damage the pump.
c) Check belt tension
d) Check for oil leaks
5.4.
Operation to be carried out 3-monthly:
a) Check tank for internal corrosion.
5.5.
Operations to be carried out every 500 hours:
a) Change air filter element
b) Check the automatic cut-out at max. pressure and the automatic cut-in at 2 bar below.
5.6.
Operations to be carried out every 1000 hours:
a) Replace the lubricating oil. For oil specifications see 5.8.
Remove the oil breather A and screw B, draining the oil into a container. Drain when the compressor is hot
so that oil drains rapidly and completely.
Replace screw B and refill through the filler aperture. Do not overfill. Replace breather.
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WARNING!
Never mix different oils and do not use non-detergent/low quality oils as the compressor may be damaged.
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WARNING!
Dispose of waste oil only in accordance with local authority requirements.
5. MAINTENANCE
fig. 6
SA2110/3, SA2115/3 & SA2120/3 - 1069 - (2) - 150200
fig. 4
fig. 5
A
B
B
C
D
C
A
