2920 1190 05
22
Industrial Air Division
Instruction book
3.2 Before starting
If the compressor has not run for the past 6 months:
-
Special precautions must be taken in order not to
damage the convertor. Consult Atlas Copco.
-
Improve the lubrication of the compressor element at
starting: loosen hose clip (3-Figs. 9b and 13) and lift the
inlet hose. Open the check valve manually and pour 3/4 l
of oil into the compressor element. Reinstall the inlet
hose.
Check the oil level (Gl-Figs. 12). The pointer should be in
the upper field of the green range or in the HIGH range. If
the pointer registers in the LOW range, depressurize the oil
system by switching off the isolator switch, close the air
outlet valve and open manual drain valve (Dm-Fig. 5).
Wait until the compressor has depressurized. Unscrew
oil filler plug (FC-Figs. 12) only one turn to permit any
pressure in the system to escape. Remove the filler cap
and add oil until the level reaches the filler neck (adapter
part included). Tighten the plug.
Fig. 12a. Oil system components of GA50 VSD
Fig. 12b. Oil system components of GA90 (W) VSD
OF.
Oil filter
Vp.
Minimum pressure valve
1.
Flexible, oil drain
Figs. 12. Oil system components
AR.
Air receiver/oil separator
DP1. Oil drain plug, air receiver
FC.
Oil filler plug
Gl.
Oil level gauge
OF
GI
1
FC
AR
Vp
AR
FC
GI
F005
DP1
