Atlas Copco GA50 (W) VSD, Инструкция, Страница: 27 / 32

27 2920 1190 05
Instruction book Industrial Air Division
4.3 Oil and oil filter change interval
Consult section 4.1 for the change intervals and section 4.4 for
the oil specifications.
4.4 Oil specifications
4.4.1 Atlas Copco Roto-injectfluid
It is strongly recommended to use Atlas Copco Roto-
injectfluid. This is special oil for screw compressors which
keeps the compressor in excellent condition.
Atlas Copco Roto-injectfluid can be ordered in following
quantities:
Quantity Ordering number
15-litre can 2901 0086 01
25-litre can 2901 0001 01
209-litre drum 2901 0045 01
The oil change interval depends on the working
temperature. See note 5 below the maintenance schedule.
4.4.2 Mineral oil
Although Roto-injectfluid is recommended, a high-quality
mineral oil with oxidation inhibitors and anti-foam and anti-
wear properties can also be used after taking some precautions.
The oil system should first be drained and flushed. The viscosity
grade must correspond to the ambient temperature and ISO
3448, as follows:
Ambient temperature Viscosity Viscosity
grade index
Consistently above 25°C (77°F) . ISO VG 68 Minimum 95
Between 25°C (77°F) and
0°C (32°F) . . . . . . . . . . . . . . . . . . ISO VG 32 Minimum 95
or 46
Never mix oils of different brands or types. Use only non-
toxic oils where there is a risk of inhaling delivered air.
4.5 Oil change (Figs. 12)
1. Run the compressor until warm. Stop the compressor,
switch off isolator switch (S0-Figs. 1 and 3a), close air
outlet valve (AV-Fig. 1), open manual drain valve (Dm-
Fig. 5) and wait until the compressor has depressurized.
Unscrew oil filler plug (FC) only one turn to permit any
pressure in the system to escape.
2. Remove vent plug (VP-Figs. 3a and 4). Drain the oil by
removing drain plugs (DP1, DP2 and DP3-Figs. 2). Fit
and tighten all plugs after draining. Collect the oil in a
collector and deliver it to the 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 switch off the isolator switch to
depressurize the compressor. Wait a few minutes to allow
the oil to settle. Unscrew oil filler plug (FC) only one turn
to permit any pressure in the system to escape. Fill the air
receiver with oil until the level reaches the filler neck
(adapter part included). Tighten filler plug (FC).
5. Reset the oil service warning. 1)
1) Consult the "User manual for Elektronikon regulator", section
"Service submenu".
14. Switch off the voltage and depressurize the compressor
before starting maintenance or repairs
15. Consult instruction book before greasing
16. Manual condensate drain
17. Automatic condensate drain
18. Torques for steel (Fe) or brass (CuZn) bolts
19. Compressor remains pressurized for 30 seconds after
switching off the voltage
20. Keep the doors closed during operation
21. Cooling water inlet
22. Cooling water outlet
23. Nozzle position, regreasing or automatic operation
24. Warning, voltage
25. Switch off the voltage and wait for at least 6 minutes
before removing the screen
Fig. 14. Pictographs