Late entry, work done last tuesday.  The corner station, filter cavity end station and the X-End station purge air systems were operated and tested, this work was done in preparation for the upcoming vents.
The corner station system was turned on and ran for 3 hours, then the dry air was sampled, the output at the drying towers produced a dew point of -41.3 deg C, a good reading.  No other issues were noted with the compressor or the drying towers.  The compressor (Kobelco) unit is to have a yearly maintenance done in the next couple of weeks.
The filter cavity end station system also ran for 3 hours, the dry air was tested, this system produced a dew point of -43.6 deg C.  No real issues with the system were encountered, compressor and drying towers.  However, the system requires power to run the drying tower, one automatic drain for the receiver tank, and a second automatic drain for the compressor all 115 AC power, we have an outlet with 4 dedicated plugs for such process, however the day of the test, 3 out of the 4 outlets were being used by other non vacuum systems.
The test at the X-End was terminated when the aftercooler fan failed to start, after 3 different tries.  The system was powered off and troubleshooted with help from Filiberto, the fan motor was dead.  A new fan motor for the aftercooler was ordered.  FRS ticket opened, see 29978.