Atlas Copco GA160

2920 1251 02
26
Instruction book
7. Remove filler plugs (FC2-Fig. 1b). Pour approx. 1 l
(0.25 US gal) of oil into the compressor elements (use
the bottle with Roto-injectfluid which is delivered with
the compressor). Reinstall the plugs. 1)
8. Close drain valve (Dma-Fig. 8).
9. For GA W, Check that the cooling water drain valves
(customer's installation) in the inlet and outlet lines are
closed. Open the water inlet valve and outlet valve
(customer's installation) and check for water flow.
10. Check that the compressor is filled with oil: the pointer
of oil level indicator (Gl-Fig. 1a) should be in the green
range or orange range.
11. Switch on the voltage. Start the compressor and stop it
immediately. Check the rotation of drive motor (M1-Fig.
14a), and on GA also of fan motors (M2/3-Fig. 14a). 2)
When facing the drive end shaft of the motors, the correct
rotation direction is counter-clockwise for both the drive
motor and the fan motors.
- First check the drive motor. If the rotation direction is
wrong, switch off the voltage and reverse two incoming
electric lines.
- Check fan motor (M2). If necessary, switch off the
voltage and reverse two incoming connections at the
terminals of circuit breaker (Q15-Fig. 2).
- Check fan motor (M3). 2) If necessary, switch off the
voltage and reverse two incoming connections at the
terminals of circuit breaker (Q16-Fig. 2).
3.2 Before starting
Attention
- The operator must apply all relevant safety precautions,
including those mentioned in this instruction book.
- In case the water system was drained (see section 3.7),
close the drain valves and fit the drain plugs.
1. Switch on the voltage. Voltage on LED (2-Fig. 3a) lights
up.
2. Close condensate drain valve (Dma-Fig. 8).
3. Open air outlet valve (3-Fig. 8).
4. Check oil level indicator (Gl-Fig. 1a): the pointer should
be in the green range or orange range. 3)
On GA W also:
5. Open the water inlet valve and outlet valve (customer's
installation).
Opening of the water outlet valve can be overlooked if,
after previous operation, the setting of this valve has not
been disturbed.
3.3 Routine starting (Fig. 3a)
1. Press start button (8). The compressor starts running in
unloaded condition. Automatic operation LED (1) lights
up.
Important
- If the oil injection pressure at the compressor elements is
too high during starting, the compressor will not start. See
section 1.2.1.5.
- In automatic operation, the regulator limits the number of
motor starts. Wait 20 minutes in case of manual restarting.
2. Approx. 10 seconds later (programmable), the compressor
starts running loaded. The message on display (4) changes
from <<Automatically unloaded>> to <<Automatically
loaded>>.
On GA W also:
3. Regulate the cooling water flow with the compressor
running loaded. Adjust the water flow to obtain the most
suitable air temperature at the element outlet, i.e. between
2°C and 7°C above the relevant temperature in Fig. 12.
Attention
- For optimum operation, the cooling water outlet
temperature must never exceed the value specified in
section 7.5.2.
- Consult Atlas Copco if condensate should be formed
during frequent unloading periods.
3.4 Starting after emergency stop or shut-
down (Fig. 3a)
Press emergency stop button (S2) (if not yet done), switch off
the voltage and then depressurize the compressor. After
remedying the fault, the compressor can be restarted as
described above.
If the function 'automatic restart after voltage failure' is activated
(see section 1.2.1.4) and the duration of repair is shorter than
the programmed power recovery time, reset the display after
remedying the fault: press key <<Reset>>, the message <<All
protection functions are OK>> will appear whereafter the
compressor can be restarted. Press keys <<Menu>> and
<<Main Screen>> to return to the main display (Fig. 3b).
1) GA/GA W 90 up to -160 are equipped with one compressor
element and unloader, all other types have two compressor
elements and unloaders.
2) GA90 and -110 have one fan motor and circuit breaker, GA132
up to -315 have two fan motors and circuit breakers.
3) If the compressor has only just stopped, wait one minute before
checking the level.