Before Starting - Atlas Copco GA55 Instruction Book

1 2
Fig. 3.2 Gear casing/motor
5
Fig. 3.3 Air receiver
1 Vibration damper
2 Bush, to be removed
3 Support, to be removed
4 Bolt
5 Bush, to be removed
Figs. 3.2 and 3.3 Transport fixations
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6. Connect the automatic condensate drain outlet (Daa-Fig.
7. On water-cooled compressors, drain valves should be fitted
8. Check the oil level. The pointer of the level gauge (Gl-Fig.
9. Labels are delivered with the compressor, warning the
3 4
10. Switch on the voltage. Start the compressor and stop it
11. Check the programmed settings. 1)
12. Start and run the compressor for a few minutes. Check that

3.2 Before starting

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If the compressor has not run for the past 6 months, it is strongly
recommended to improve the lubrication of the compressor
element at starting: Disconnect inlet pipe (2-Fig. 1.4), remove
unloader (UA-Fig. 1.3) and pour 3/4 l of oil into the compressor
element. Reinstall the unloader and reconnect the pipe. Make
sure that all connections are tight.
1. Check the oil level (Gl-Fig. 3.5). The pointer should register
2. If the coloured part of the air filter service indicator (VI-
On water-cooled compressors also:
3. Check that the cooling water drain valves (customer's
1.5) to the drain collector.
by the customer in the water inlet and outlet pipes. Also
provide and open the water inlet and regulating valve.
Consult section 2.6 for the water requirements.
3.5) should register in the green or orange range. The bottle
with Atlas Copco Roto-injectfluid (4-Fig. 3.1) can be used
for topping up. Check section 3.2 for lubrication of the
compressor element.
operator that:
- the compressor automatically restarts after voltage
failure (see section 1.3.1)
- the compressor is automatically controlled and may be
restarted, even after manually stopping (see section
1.3.1)
Stick these labels on an obvious place near the control
panel. Read these warnings (as well as the warnings
mentioned in section 1.3.1) and take them into
account.
immediately. Check the rotation direction of the motors.
First check the drive motor (M1-Fig. 1.3). The correct
rotation direction is indicated by an arrow (2-Fig. 1.3)
provided on the gear casing (rotation direction depends on
compressor type). If the rotation direction is wrong, switch
off the voltage and reverse two incoming electric lines.
Then check fan motor (M2-Fig. 1.3) on air-cooled
compressors. Rotation arrows, visible through the grating
in the roof, are provided on the plate below the fan. If
necessary, switch off the voltage and reverse two incoming
electric connections at the terminals of circuit breaker (Q15-
Fig. 1.7).
the compressor operates normally.
in the green range or in the orange range.
Fig. 3.6) shows full out, replace the air filter element (AF).
Reset the service indicator by pushing its knob and reset
the service warning 11).
installation) in the inlet and outlet pipes are closed.
Instruction book
2920 1381 02