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Industrial Air Division
Instruction book
Remark: For overhauling valves or carrying out preventive maintenance, service kits are available. Consult the Parts list for the
contents of the kits.
Notes
1. More frequently when operating in a dusty atmosphere.
2. Use only (an) oil filter(s) 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 1 bar.
5. It is strongly recommended to use Atlas Copco Roto-injectfluid. The change interval for this oil is 4,000 running hours or
yearly if operating continuously at a compressor element outlet temperature below 100°C and 2,000 running hours or yearly
if operating continuously close to or above 100°C.
6. Consult the "User manual for Elektronikon regulator" for resetting the service timer.
7. Replace the filter if damaged.
8. Consult the "User manual for Elektronikon regulator", section "Display test".
9. Consult the "User manual for Elektronikon regulator", section "Modify settings submenu" before modifying the temperature
protection settings.
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 compressor must shut down. Afterwards, reset the warning and
shut-down levels to their original values.
10. Atlas Copco has oil separators to separate the major part of the oil from the condensate to ensure that the separated water
meets the requirements of the environmental codes.
on the regulator. During this program the compressor will run
at a speed of 1200 rpm and the compressed air is blown off via
solenoid valve (Y1-Figs. 2). When the regreasing program
has finished, the compressor can be put into operation again by
pressing the start button. Reset the regulator as described in
the "User manual for Elektronikon regulator" section "Service
reset".
4.2 Compressor motor (M1-Figs. 3)
Tubes with the correct type of grease can be ordered from
Atlas Copco (see section 4.9).
4.2.1 GA50 VSD
The bearings must be regreased with KLÜBER - ASONIC HQ
72 - 102. Quantity: 5 g (0.18 oz) per bearing. After regreasing
the bearings, loosen wing nut (1-Fig. 13), lift nozzle (2-Fig.
13) and turn it 90° clockwise (automatic operation pictograph
covered and grease pump pictograph visible); tighten the wing
nut. Run the Regreasing program from the Test submenu on
the regulator. During this program the compressor will run at a
speed of 1200 rpm and the compressed air is blown off via
solenoid valve (Y1-Fig. 13). When the regreasing program
has finished, loosen the wing nut, lift the nozzle and turn it
back into its original position (grease pump pictograph covered
and automatic operation pictograph visible). The compressor
can be put into operation again by pressing the start button.
Reset the regulator as described in the "User manual for
Elektronikon regulator" section "Service reset".
If the compressor should shut-down on "Over pressure" after
regreasing the motor bearings, check that the nozzle is in the
correct position.
4.2.2 GA90 (W) VSD
The bearings must be regreased with KLÜBER - ASONIC HQ
72 - 102. Quantity: 10 g (0.35 oz) per bearing. The regreasing
interval depends on the operating conditions of the compressor.
The parameter to determine the regreasing interval is indicated
by the regulator. Every time the bearings have been regreased,
the Regreasing program must be run from the Test submenu
Y1. Solenoid valve
1.
Wing nut
2.
Blow-off nozzle
3.
Hose clip, air inlet hose
4.
Air inlet hose
Fig. 13. Blow-off nozzle of GA50 VSD
2
