Atlas Copco Oil-Injected Rotary Screw Compressor GA 55+

Compressor stopped and voltage switched off

Snap clips of air filter (AF) released and cover removed

Old air filter element discarded

Service indicator (VI) reset by pushing the knob in the extremity of the body

Air filter service warning reset

Sign off on the air filter element replacement

Open the condensate sample valve at the side of the compressor for 5 seconds and dispose of the collected condensate according to local regulations for oil containing water

Re-open the test valve and collect the condensate in the test bottle

Compare the turbidity of the sample with the 15 ppm turbidity reference bottle

If the turbidity of the test sample is more intense than the reference turbidity, a request for servicing should be initiated, to be carried out within 2 weeks time.

The vertical position of the test outlet ensures that there is enough clean activated carbon left above this position to keep the condensate under 15 ppm for at least 2 weeks.

Sign off on the condensate check

Warning: Always use genuine Atlas Copco parts for maintenance.

Electronic water drain(s) in working condition?

If not, replace the wearing parts of the electronic water drain(s).

Select the type of service kit used

Service kits comprise all parts required for servicing the component.

All parts from the service kit used?

A full range of extensively tested lubricants is available.

Lubricants used to keep the compressor in excellent condition?

Warning: Depressurise the compressor before removing the valve

Safety valve unscrewed one or two turns and retightened

Compressor depressurised before valve removal

Safety valve tested on a separate air line

Safety valve opens at the set pressure stamped on the valve

Warning: No adjustments are allowed. Never run the compressor without safety valve

Sign off on the safety valve testing

WARNING! The operator must apply all relevant Safety precautions

Always drain the compressor oil at all drain points. Used oil left in the compressor can contaminate the oil system and can shorten the lifetime of the new oil

Never mix lubricants of different brands or types as they may not be compatible and the oil mix will have inferior properties. A label, indicating the type of oil filled ex-factory, is stuck on the air receiver/oil tank

Run the compressor until warm. Stop the compressor after 3 minutes of unloaded operation. Close the air outlet valve and switch off the voltage. Wait a few minutes and depressurise by unscrewing oil filler plug (FC) just one turn to permit any pressure in the system to escape

Air cooled units: loosen the vent plug (VP) of the oil cooler and wait for 5 minutes

Remove drain plug (DP1) and open drain valve (Dm)

Also drain the oil by removing the drain plug: on the check valve and on the gear casing

Collect the oil in a collector and deliver it to the local collection service. Refit and tighten the drain and vent plugs after draining