AEC Continuous Vacuum/Pressure Conveying Systems - Manual (Page 50)

Single- and Dual-Blower Continuous Vacuum/Pressure Systems Page 49
and pressure side material lines of material (set duration in the Auto Shutdown Timer
or Purge Timer), the pressure side of the conveying system also stops.
Maintenance and Long-Term Shutdown
When shutting down the unit for maintenance or for a long period of time, follow the
procedure listed in Normal Shutdown in the previous section. Then continue with
the following steps:
1. Open (de-energize) the disconnect switch at the control enclosure and the one
at the power drop.
2. Turn off compressed air to the unit by closing the shutoff valve in the supply
circuit.
5-7 Unloading Railcars
Refer to Appendix A on Page 57 for information on proper procedures for unloading
railcars using AEC equipment.