Download Print this page

Operation; Maintenance - Sealey SAC1276B Manual

270l belt drive air compressor 2x3hp with cast cylinders

Advertisement

5.

OPERATION

WARNING! Ensure that you have read, understood and apply Section 1 Safety Instructions.
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' due to losses within the compressor.
STARTING THE COMPRESSOR
5.1.
Check both switches (on the control box and the pressure switch housing) are in the OFF (0) position. Plug into the main electrical
supply. To turn the compressor on, turn the switch on the control box (fig.6) to the '1' position and then turn the switch on the pressure
switch housing (fig.7) clockwise to position 'I'.
5.2.
The first motor/pump will start up followed a few seconds later by the second motor/pump.
5.3.
When starting the compressor for the first time, leave it running with no air tools connected to the air outlet. Make sure that the 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 (fig.7) - is achieved. The compressor will now operate automatically. 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.4.3. To stop the compressor, first turn the main switch (fig.7) to the '0' position and then turn the switch on the control box (fig.6)
to the '0' position. The compressed air inside the compressor heads will flow out, making the restart easier and preventing the motors from
being damaged. DO NOT, other than in an emergency, stop the compressor by switching off at the mains, or by pulling the plug out, as the
pressure relief will not then operate and motor damage may result upon restart.
5.4.
The motors of the compressor are fitted with a thermal breaker located in the housing on top of the motors. The manual resetting buttons
are located in the end of the housings as shown in fig.10A. When the individual breaker is tripped, wait for a few minutes and then press
the reset button.
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.7) 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, the 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 5.3.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 5.5.a.
6.2.
OPERATIONS TO BE CARRIED OUT WEEKLY:
a) Drain condensation by opening the valve located under the tank (fig.9). Place a container under the valve and open the valve by
turning anti-clockwise.
WARNING! Take care if there is still pressure inside the cylinder as water could flow out with coinsiderable 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:
© Jack Sealey Limited
FIG.6
FIG.8
Original Language Version
FIG.9
SAC1276B, SAC2276B
FIG.7
Issue 5 (ALL)
18/08/23

Advertisement

loading

This manual is also suitable for:

Sac2276b.v2