AEC Continuous Vacuum/Pressure Conveying Systems - Manual (Page 48)

Single- and Dual-Blower Continuous Vacuum/Pressure Systems Page 47
Silo Selector Switch
AEC vacuum/pressure pumps are equipped with a silo selector switch. This
switch is wired to the high level switches inside individual silos, and selects
which high level sensor is monitored. Wire this switch according to the wiring
diagram and schematic.
Turn the silo selector switch indicator to the silo currently being filled by the
vacuum/pressure blower(s). When the selected high level silo indicator senses a
full silo, a purge stop cycle actuates.
Your AEC vacuum/pressure pump(s) package comes standard with a two-
position selector switch. More than two positions are available; stipulate the
number of positions you want when ordering.
5-4 Pre-Startup Checklist
Before operating the system, verify the following areas:
; Verify that you made a solid compressed air connection.
; Verify that you made all material, pressure, and vacuum connections and that
they are secure.
; For units equipped with a high temperature thermostat ( 1THS ), verify that you
properly adjusted the high temperature shutdown setting.
; Verify that any companion equipment (filter receiver, cyclone, rotary airlock,
aftercooler) are ready to operate.
; Verify that the disconnect switches in your power drop and at the control
enclosure are energized.
; Verify that pump and rotary airlock are correct.
5-5 Starting the System
After you install the system and made all pre-startup checks, perform the following
procedure to start the unit:
; Make any final connections at the material source.
; Turn on compressed air.
; Press Start . System operation is automatic and continuous.
; Make adjustments to the system (i.e. vacuum, blowback, automatic shutdown,
etc.) as needed.