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2920 1190 05
Instruction book
Industrial Air Division
3 Operating instructions
Safety precautions
The operator must apply all relevant safety precautions,
including those mentioned in this book.
Altitude operation
Consult Atlas Copco if operating above 1000 m.
Moving/lifting
The compressor can be moved by a lift truck using the slots in
the frame. Before lifting, reinstall the transport securing bolts
(see section 3.1). Make sure that the forks protrude from the
other side of the frame. The compressor can also be lifted
after inserting beams in the slots. Make sure that the beams
cannot slide and that they protrude from the frame equally. The
chains must be held parallel to the bodywork by chain spreaders
in order not to damage the compressor. The lifting equipment
must be placed in such a way that the compressor will be lifted
perpendicularly. Lift smoothly and avoid twisting.
3.1 Initial start-up
Remarks
1. Read the "User manual for Elektronikon regulator" to
familiarize yourself with all regulator functions.
2. Consult section 2 for the dimension drawings, electric cable
size and installation proposal.
Start-up
1. The compressor element and motor are secured to the frame,
immobilizing the vibration dampers (2-Figs. 9) during
transport.
On GA50 (W) VSD, remove the stud, support and nuts (4-
Fig. 9a) on both sides of the motor support. Remove the
transport supports from the compressor support.
On GA90 (W) VSD, remove the stud and nuts (1-Figs. 9)
of both compressor element supports, the start and speed
control unit is secured to the rear panel of the regulator
cabinet, immobilizing vibration dampers (1-Fig. 8b).
Remove nuts (2-Fig. 8b).
2. Check that the electrical connections correspond to the local
codes and that all wires are clamped tight to their terminals.
The installation must be earthed and protected against short
circuits by fuses of the inert type in all phases. An isolator
switch must be installed near the compressor.
3. Check the voltage selecting wires at the primary side of
transformer (T1-Figs. 8) and the setting of fan motor circuit
breaker (Q15-Figs. 8). Check that the switch on the circuit
breaker is in position "I".
On GA50 (W) VSD, remove cover (3-Fig. 8a) and check
the voltage selecting wires at the primary side of transformer
(T2-Fig. 8a); correct as necessary.
4. Fit air outlet valve (AV-Fig. 1) to the air outlet pipe. Close
the valve. Connect the air net to the valve.
5. Connect the manual and automatic condensate drain outlet
to a drain collector as described in section 2.3.
6. Check the oil level. The pointer of the level gauge (Gl-
Figs. 12) should register in the green or orange range. The
bottle delivered loose with the compressor is filled with
Atlas Copco Roto-injectfluid and can be used for topping
up.
7. For GA90 VSD, a noise-damping kit is available as an
option, including a cooling air outlet duct and baffle plates.
8. On water-cooled compressors: Close the cooling water
drain valve. Open the cooling water inlet valve and the
regulation valve.
9. A sticker dealing in short with the operating instructions
and explaining the pictographs is delivered with the
literature set. Affix the sticker next to the control panel.
Make yourself familiar with the instructions and pictographs
explained.
Stick labels on an obvious place near the control panel,
warning the operator that:
-
the compressor may automatically restart after voltage
failure (see section 1.4.1)
-
the compressor is automatically started and stopped (see
section 1.2)
-
the compressor may be remotely controlled (see section
3.2)
10. On water-cooled compressors: Check the cooling water
quality (see section 2.5). A drain valve, a regulation valve
and a shut-off valve should be installed by the customer in
the cooling water piping.
11. ON GA50 (W) VSD, switch on the voltage. Open the air
outlet valve and start the compressor. Check the rotation
direction of the fan motor, the correct rotation direction is
indicated by arrow (3-Fig. 3a). If the rotation direction is
wrong, reverse two incoming connections on the terminals
of circuit breaker (Q15-Fig. 8a). The compressor motor
will always rotate in the correct direction.
On GA90 (W) VSD, switch on the voltage. Open the air
outlet valve and start the compressor. The start and speed
regulation unit prevents the compressor motor from rotating
in the wrong direction. In case of wrong direction of rotation
following error code will appear on the display: Convertor
failure error 56 0 1. If the compressor motor should not
start and the fan motor rotates in the wrong direction, (the
correct rotation direction is indicated on the fan housing)
switch off the voltage and reverse two incoming electric
lines. If the compressor motor starts and the fan motor
rotates in the wrong direction, reverse two incoming
connections on the terminals of circuit breaker (Q15-Fig.
8b). Reset the regulator as described in the "User manual
for Elektronikon regulator" section "Shut-down reset".
12. Check the programmed settings. 1)
13. Start and run the compressor for a few minutes. Check that
the compressor operates normally.
1) Consult the "User manual for Elektronikon regulator", sections
regarding the submenus "Measured data", "Service", "Modify
settings", "Timer" and "Programmable settings".
