Drawing reference Description
AC Aftercooler
AC (ER) Extra aftercooler in case of the energy recovery option
IC Intercooler
OC Oil cooler
RC Regeneration cooler (only on Full-Feature compressors)
Keep the coolers clean to ensure cooling efficiency.
On air-cooled compressors proceed as follows:
Cooler block (CB) of air-cooled Full-Feature compressors
Step Action
1 Stop the compressor.
2 Depressurize the air system as follows:
• Close the air outlet valve.
• Press the emergency stop button.
• Open the isolating switch (customer's installation) to switch off the voltage to the
compressor, and lock it (Lock Out - Tag Out procedure, LOTO).
3 Remove the compressor roof.
4 Remove any dirt form the coolers with a fibre brush in the direction of the fins.
5 Remove dirt from the fans.
6 Clean the coolers with an air jet in the reverse direction to normal flow (i.e. from the
outside to the inside of the compressor). Use low pressure air. If required, the pressure
may be increased up to 6 bar(e) (87 psig).
Instruction book
2920 1815 04 291
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