F1 and F2 Filters

1. Turn OFF HR3 (Kaeser) Compressor.
2.  Close MV101 and MV102.
3.  Crack open V17 and vent the pressure gently, until you don't hear a gas venting out, and close V17.
4.  Close V14.
5.  Drain the oil/contaminants from the two plugs located at the bottom of F1 and F2 filters.
6.  Close the drain plugs firmly.
7. Open V14.