Operation; Starting The Compressor - Sealey SAC2276B.V2 Manual

fig.3
fig.4
4.

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, and could cause damage to the 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' due to losses within the compressor.

STARTING THE COMPRESSOR

4.1. Check that 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.5) to the '1' position and then turn the switch
on the pressure switch housing (fig.6) clockwise to position 'I'.
The first motor/pump will start up followed a few seconds later
by the second motor/pump.
© Jack Sealey Limited
4.2. 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.6) - 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.6) to the
'0' position and then turn the switch on the control box (fig.5) 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.
4.4. 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.9A. 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.6) 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.
fig.6
Original Language Version
fig.5
SAC2276B.V2 Issue:3 (H,F) - 18/07/18