User manual

Industrial Air Division
172920 1163 04
1) Consult the User manual for the electronic regulator, sections
"Status data submenu" and "Service submenu".
2. If the red part of the air filter service indicator (VI-Fig. 14b)
shows full out, stop the compressor and replace the air filter
element (see section 4.1).
3. If automatic operation LED (1) is alight, the regulator is
automatically controlling the compressor, i.e. loading,
unloading, stopping of the motors and restarting.
2.4.1 Checking the display 1)
1. Regularly check the display for readings and messages.
Normally the main display (Fig. 7b) is shown, indicating the
compressor outlet pressure, the status of the compressor and
the abbreviations of the functions of the keys below the display.
See section 1.4.
2. Always check the display (4) and remedy the trouble if alarm
LED (3) is alight or blinks. See section 1.4.2.1.
On water-cooled compressors also:
5. If necessary, regulate the cooling water flow during loaded
running to obtain the most suitable temperature at the outlet
of the compressor element, i.e. between 2°C above the relevant
temperature in Fig. 10 and approx. 5°C above that value. For
optimum operation, the cooling water outlet temperature must
never exceed the value specified in section 6.5. Consult Atlas
Copco if condensate should be formed during frequent
unloading periods.
2.4 During operation (Fig. 7a)
1. Check the oil level during loaded operation: the pointer of the
level indicator (Gl-Fig. 12) must register in the green range; if
not, press button O (9), wait until the compressor has stopped,
depressurize the oil system (by unscrewing oil filler plug (FC)
one turn), wait a few minutes and add oil until the level reaches
the filler plug. Tighten the plug.
Example:
If operating at a pressure of 10 bar(e) in an ambient temperature of 20°C and at a relative air humidity of 100 %, the minimum temperature
to prevent condensate from forming is 68°C. Regulate the cooling water flow during loaded operation to obtain a temperature between
70°C and approx. 75°C at the outlet of the compressor element.
Fig. 10. Minimum compressor element outlet temperature for water-cooled compressors