SACV42755B fig.1
5. OPERATION
WARNING! Ensure that you have read, understood and apply Section 1 Safety Instructions.
IMPORTANT! The use of extension leads to connect these compressors to the mains is not recommended as the resulting voltage
drop reduces motor, and therefore pump performance which may cause damage to your compressor.
NOTE: 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' owing to losses within the compressor.
5.1.
STARTING THE COMPRESSOR
5.1.1.
Check that the pressure switch (fig.2.1) is OFF in the "O" position.
5.1.2.
Plug mains lead into mains supply and start the compressor by moving the pressure switch to the ON 'I' position. Check the
direction of rotation (see arrow on belt cage) to confirm correct wiring of 3-phase plug.
5.1.3.
When starting the compressor for the first time, leave it running with no air tools connected to the air outlet. make sure that pressure
in the tank rises and that the compressor stops automatically when the maximum pressure value allowed, written on the plate and
shown on the gauge, is achieved. The compressor will now operate automatically.
5.1.4.
The pressure switch stops the motor when the maximum tank pressure is reached and restarts it when the pressure falls below the
minimum threshold - approx. 2bar (29psi) less than the maximum pressure.
5.1.5.
Stop the compressor by moving the pressure switch (fig.2.1) to the "O" position. The compressed air inside the compressor
head will vent, 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 power, or by pulling the plug out, as the
8
pressure relief will not then operate and motor damage may result upon restart.
5.1.6.
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.
NOTE:
a) If the motor does not cut in and out, but runs continuously when using an air appliance, the capacity of the compressor
may be too small for the equipment or tool.
b) The gauge (fig.2.2) 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 maximum, a safety valve will activate.
WARNING! for this reason do not tamper with, or adjust, the switch or safety valve.
6. MAINTENANCE
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.
WARNING! Before performing any maintenance operation, switch off the compressor, disconnect from electricity supply and release
all air from the tank. (Except for 6.3.a)
6.1.
OPERATIONS TO BE CARRIED OuT AFTER THE FIRST 50 WORkING HOuRS:
a) Check that all bolts/nuts are tight, particularly those retaining the crankcase and cylinder head.
b) Replace the lubricating oil - see para 6.5.
6.2.
OPERATIONS TO BE CARRIED OuT WEEkLY:
a) Drain condensation by opening the drain cock located under the tank (fig.3). Place a container
under the valve and open the valve by turning anticlockwise.
WARNING! Take care if there is compressed air in the tank as water could flow out with
considerable force. Recommended pressure 1 - 2bar max.
b) Check oil level and if necessary, top up.
6.3.
OPERATIONS TO BE CARRIED OuT EVERY 50 HOuRS:
(or more frequently, if the compressor operates in a very dusty atmosphere):
a) Turn off the compressor and remove the filter element (fig.4). Using stored air from its tank, clean the filter with compressed air.
(Wear eye protection and DO NOT direct air towards the body or hands). DO NOT operate the compressor without the filter as
foreign bodies or dust could seriously damage the pump. Replace the filter element.
b) Check for oil leaks.
© Jack Sealey Limited
fig.1a
fig.2
Original Language Version
SACV52775B fig.1
SAC42755B, SAC52775B | Issue:2 (H3F) 26/03/19
fig.3