User manual

Industrial Air Division
212920 1163 04
1) Whichever interval comes first. The local Sales Company may overrule the maintenance schedule, especially the service intervals,
depending on the environmental and working conditions of the compressor.
Remark
For overhauling valves or carrying out preventive maintenance, service kits are available (Fig. 11). Consult the Parts list for the contents of
the kits.
Notes
1. More frequently when operating in a dusty atmosphere.
2. Use an oil filter as specified in the Parts list. The part number is marked on the filter.
3. Special Atlas Copco oil for screw compressors keeping the compressor in excellent condition.
4. If the pressure drop reaches 0.5 bar, it is strongly recommended to change the filter element as its efficiency is decreasing. The filter
element must be changed when the pressure drop reaches 0.7 bar.
5. It is strongly recommended to use Atlas Copco Roto-injectfluid. The change interval for this oil is 4000 running hours or yearly if
operating continuously at a compressor element outlet temperature below 100°C and 2000 running hours or yearly if operating
continuously close to or above 100°C.
6. Consult the User manual for the electronic regulator for resetting the service timer.
7. Replace the filter if damaged.
8. On Full-feature compressors, brush or blow off the surface of the condensor.
9. Consult the User Manual for the electronic regulator, section "Display test".
10. Consult the User Manual for the electronic regulator before modifying the temperature protection settings, section "Modify settings
submenu".
Decrease the shut-down warning level and shut-down level for the compressor element outlet temperature to the minimum settings.
Run the compressor: when reaching the setting, the unit must shut down. Afterwards, reset the warning and shut-down levels to their
original values.
11. Atlas Copco has oil separators to separate the major part of oil from condensate to ensure that the condensate meets the
requirements of the environmental codes.
12. Any leak should be attended to immediately.
13. Damaged flexibles must be replaced immediately.
3.5 Oil change (Fig. 12)
1. Run the compressor until warm. Stop the compressor, wait a
few minutes and depressurize it by unscrewing oil filler plug
(FC) only one turn to permit any pressure in the system to
escape.
2. Remove vent plug (VP-Fig. 2a or 2b). Drain the oil by removing
drain plugs (DP2, DP3-Fig. 2b), the drain plug of flexible (8-Fig.
2a) and plug (DP4-Fig. 2a). Fit and tighten all plugs after
draining. Collect the oil in a collector and deliver it to the local
oil collection service.
3. Fill air receiver (AR) with oil until the level reaches the filler
neck. Take care that no dirt drops into the system. Reinstall
and tighten filler plug (FC).
4. Run the compressor for a few minutes. Stop the compressor
and wait a few minutes to allow the oil to settle. Depressurize
the system. Fill the air receiver with oil until the level reaches
the filler neck. Tighten filler plug (FC).
5. Reset the oil service warning. 1)
1) Consult the User manual for the electronic regulator, section
"Service submenu"
AR. Air receiver/oil separator
FC. Oil filler plug
Gl. Oil level indicator
1. Oil drain flexible
Fig. 12. Oil system components