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2920 1190 05
Instruction book
Industrial Air Division
3. Remove the air receiver cover with scavenging line. Take
care not to distort the scavenging line.
4. Fit the new separator and cover using new O-rings which
are included in the oil separator kit (see section 4.9).
5. Reconnect the flexibles.
6. Tighten filler plug (FC).
7. Reset the oil separator service warning. 1)
4.8 Storage after installation
Run the compressor twice a week until warm.
If the compressor is stored without running from time to time,
protective measures must be taken. Consult Atlas Copco.
4.9 Service kits
Service kits are available offering you the benefits of genuine
Atlas Copco parts while keeping the maintenance budget low.
The kits comprise all parts needed for servicing.
Compressor type
GA50 (W) VSD
GA90 (W) VSD
Service kit for:
Ordering
Ordering
number
number
Oil filters and air filter: 2901 0326 00
2901 0050 00
Oil separator:
2901 0213 00
2901 0070 00
Motor regreasing:
2901 0338 00
2901 0338 00
5 Adjustments and servicing
procedures
5.1 Air filter
5.1.1 Recommendations
1. Never remove the element while the compressor is running.
2. For minimum compressor down-time, replace the dirty
element by a new one.
3. Discard the element when damaged.
5.1.2 Servicing
5.1.2.1 GA50 (W) VSD
1. Release the snap clips and remove the dust trap. Remove
the filter element and clean the filter chamber.
2. Install the new element and the dust trap.
3. Reset the air filter service indicator. Reset the air filter
service warning. 1)
5.1.2.2 GA90 (W) VSD (AF-Fig. 4)
1. Unscrew the wing nut of the filter cover. Remove the filter
element and clean the filter chamber.
2. Install the new element and the filter cover.
3. Reset the air filter service indicator. Reset the air filter
service warning. 1)
5.2 Coolers
Keep the coolers clean to maintain the cooling efficiency.
Air-cooled compressors
To facilitate external cleaning of the coolers, side panels (1-
Figs. 3 and 4) can be removed.
Remove any dirt from the coolers with a fibre brush. Never
use a wire brush or metal objects. Then clean by air jet in
reverse direction of normal flow.
Refit the side panels.
Water-cooled compressors
Consult Atlas Copco.
5.3 Safety valve
Operating
Operate the safety valve by unscrewing the cap one or two turns
and retightening it.
Testing
The valve can be tested on a separate compressed air line. If
the valve does not open at the pressure specified in section 7.2,
consult Atlas Copco. No adjustments are allowed.
1) Consult the "User manual for Elektronikon regulator", section
"Service submenu".
