• Remove the service plates (1) at the fan compartment.
• Remove any dirt from the coolers with a fibre brush. Brush in the direction of the cooling fins.
Also remove any dirt from the fan with a fibre brush.
• Next, clean with an air jet in the reverse direction to normal flow. Use low pressure air. If
necessary, the pressure may be increased up to 6 bar(e) (87 psig).
• If it is necessary to wash the coolers with a cleaning agent, consult Atlas Copco.
• Remove the cover used during cleaning.
• Mount the service plates (1) at the fan compartment.
Instructions for compressors with dryer.
• Stop the compressor, close the air outlet valve and switch off the voltage.
• Remove any dirt on the condenser inlet with a vacuum cleaner.
• Next, clean with an air jet in the reverse direction to normal flow. Use low pressure air. If
necessary, the pressure may be increased up to 6 bar(e) (87 psig).
• Clean the condenser area with a vacuum cleaner.
Instructions for water-cooled compressors
Consult Atlas Copco.
9.7 Safety valves
Testing
Before removing the valve, depressurize the compressor. See also section Problem solving.
The safety valve (SV) can be tested on a separate air line. If the valve does not open at the set
pressure stamped on the valve, it needs to be replaced.
Warning
No adjustments are allowed. Never run the compressor without safety valve.
9.8 Dryer maintenance instructions
Safety precautions
Refrigeration dryers of ID type contain refrigerant HFC.
Instruction book
152 2920 7109 51
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