Instructions for air-cooled compressors
• Stop the compressor, close the air outlet valve and switch off the voltage.
• Cover all parts under the coolers.
• Remove any dirt from the coolers with a fibre brush. Never use a wire brush or metal
objects.
• 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.
7.6
Safety valves
Location of safety valve
GA 15 up to GA 22
Operating
Operate the safety valve from time to time by unscrewing the cap one or two turns. Retighten it
afterwards.
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.
7.7
Dryer maintenance instructions
Safety precautions
Refrigeration dryers of ID type contain refrigerant HFC.
Instruction book
78
API451763
