Take care that no dirt drops into the system. Refit and tighten filler plug (FC).
8. Run the compressor loaded for a few minutes. Stop the compressor.
9. • Close the air outlet valve and switch off the voltage.
• Wait 3 minutes for the compressor to depressurise the vessel.
• Open the condensate drain valve (Dm) to depressurise the cooler. (see Condensate system) and
close again.
• Unscrew the oil filler plug (FC) just one turn to permit any remaining pressure in the system to
escape.
10. • Fill the air receiver (AR) with oil until the level reaches the filler neck. (see Operating
instructions / During operation)
• Refit and tighten filler plug (FC).
When the oil level is too low, go back to step 7.
7.6 Coolers
General
Keep the coolers clean to maintain their efficiency.
Procedure
• Stop the compressor, close the air outlet valve and switch off the voltage.
• Cover all parts underneath the cooler.
• Remove the service plate (1) at the fan compartment.
Instruction book
2920 7109 23 109