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4. Compressed Air Supply
It is recommended to use a 5-micron (or smaller) filter to remove water and dirt from
the compressed air supply. A 5-micron filter will remove 99% of foreign material from
the air supply; the use of an oil filter with an effective filtration of 0.01 ppm will remove
the oil droplets for an even cleaner compressed air supply.
If this is not EX certified it will need to be installed outside the hazardous area.
Failure to use a filter may cause clogging and freezing of the compressed air line and
the components within the Cabinet Cooler.
When the temperature of the compressed air within the Cabinet Cooler reaches 0°C
the water vapour in the air will start to freeze. This could potentially cause a problem
with ice clogging the orifices of the Cabinet Cooler.
In this instance an air dryer must be used to lower the dew point and keep water
vapour out of the air line. A dryer rated at -19°C will produce a dew point low enough
to eliminate the water vapour freezing.
