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Operation; Maintenance - Sealey SAC32775B Quick Start Manual

270l belt drive air compressor 7.5hp 3ph

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4.1.
ATTACH ANTI-VIBRATION MOUNTS
4.1.1.
Assemble the anti-vibration mounts to the bottom tank brackets using the nuts and washers supplied (fig 2).
4.2.
ATTACH THE FILTERS
4.2.1.
Screw the filter unit into the port openings in each head as shown in (fig 5).
4.2.2.
Place a filter cover over each threaded rod protruding from the back half of the filter and secure each with a wing nut (fig 5).

5. OPERATION

WARNING! Ensure that you have read, and fully understood and apply Section 1 Safety Instructions.
5.1.
IMPORTANT. The use of extension leads to connect this compressor to the mains is not recommended as the resulting voltage
drop reduces motor, and therefore pump performance and could damage your compressor.
5.2.
Confirm that the mains voltage corresponds with the voltage shown on the compressor data plate.
5.3.
The compressor should be operated on a horizontal flat surface, or one that does not exceed 5° either transversely, and should be in
a position that allows good air circulation around the unit, 1000mm nominal gap.
5.4.
Before using the compressor check the oil level by referring to the oil sight glass (fig 5), if the oil level is not up to the red centre mark
it should be further topped up with recommended oil, see section 6.7.
5.5.
To top up, undo filler cap (fig 5), top up oil level to required level, then replace filler cap.
5.6.
Take care when selecting tools for use with the compressor. Air tool manufacturers normally express the volume of air 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.
5.7.
STARTING THE COMPRESSOR.
5.7.1.
To turn the compressor on depress the green ON button (fi g 6).
5.7.2.
To turn the compressor off depress the red button OFF (fi g 6).
5.7.3.
Check that the ON/OFF button is in the OFF position.
5.7.4.
Plug the mains lead into mains supply and start the compressor by depressing the green ON button (fi g 6).
5.7.5.
Leave the compressor running with no air line or tools connected. Make sure that the pressure in the tank rises and that the
compressor stops automatically when the maximum pressure is reached. This value is written on the specification plate and
may take in excess of 5 minutes. The compressor will now operate automatically. The pressure switch (fig 6) stops the motor when
the maximum tank pressure is reached and restarts it when pressure falls below the minimum threshold approximately 2bar
(29psi) less than the maximum pressure.
5.7.6.
Stop the compressor by depressing the red button OFF (fi g 6). The compressed air inside the compressor head will flow out via the air
line tube situated beneath the switch housing. Restart is made easier and prevents 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 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.
NOTE: 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.
Should the pressure in the main tank exceed the pre-set maximum, the safety valve (fig 5) will activate.
WARNING! For this reason DO NOT tamper with, or adjust, the pressure switch (fig 6) or safety valve (fig 5).

6. MAINTENANCE

In order to keep the compressor in good working condition, periodic maintenance is essential.
WARNING! Before performing any maintenance operation, switch off the compressor, disconnect from electricity supply and
release all air from the tank.
IMPORTANT! Failure to carry out maintenance tasks may invalidate the warranty on your compressor.
6.1.
OPERATIONS TO BE CARRIED OUT AFTER THE FIRST 5 WORKING HOURS:
A: Check that all bolts/nuts are tight, particularly those retaining the crank case and cylinder head.
6.2.
OPERATIONS TO BE CARRIED OUT AFTER THE FIRST 50 WORKING HOURS:
B: Replace the lubricating oil.
6.3.
OPERATIONS TO BE CARRIED OUT DAILY:
A: Drain condensation by opening the valve located under the tank (fi g 7). Place a container under the valve and slowly open the
valve by turning counter clockwise.
© Jack Sealey Limited
Original Language Version
fi g.5
SAC32775B Issue 1 31/03/22
fi g.6
fi g.7

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