Sealey SACV42755B - Manual (Page 3)

 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.
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.
5.1.4. 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
pressure relief will not then operate 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.
5. OPERATION
fig.2 fig.1.a
4.1. Remove compressor from packaging and inspect for any shortages or damage. If anything is missing or damaged contact your
supplier.
4.2. Save the packing material for future transportation of the compressor. We recommend that you store the packing in a safe location,
at least for the period of the guarantee. Then, if necessary, it will be easier to send the compressor to the service centre.
4.3. The compressor should be secured to a flat surface and should be in a position that allows good air circulation around the unit (at
least a 1mtr gap).
4.4. Check oil level, consulting the reference marks on the stick (fig.1 + fig.1a) or the oil level sight glass depending on model
Use only synthetic oil (see maintenance section for oil specification).
4.5. Confirm the mains voltage corresponds with the voltage shown on compressor data plate.
Have a qualified electrician connect in accordance with Section 1.1. and check that the motor operates in the correct direction.
4.6. When fully installed, start the compressor and ensure that everything is in good working order before operational use.
Check the direction of rotation (see arrow on motor) to confirm correct wiring of 3-phase plug. Re-check oil levels.
4. PREPARATION
SACV42755B fig.1 SACV52775B fig.1
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.
Original Language Version © Jack Sealey Limited SACV42755B,ASACV45775B Issue: 1 - 17/12/14