AEC Continuous Vacuum/Pressure Conveying Systems - Manual (Page 42)

Single- and Dual-Blower Continuous Vacuum/Pressure Systems Page 41
Notes: The drawing on the previous page shows a typical CVP/CPP system for conveying
plastic pellets. For dusty material applications, replace the cyclone separator/filter
chamber combinations with one self-cleaning filter chamber.
In SVP systems, an SVP blower is used in lieu of CVP/CPP combination blowers.
5-2 Alarms, Controls, and Indicators
Single- and dual-blower vacuum/pressure systems include the following controls and
indicators:
Controls
Disconnect (DISC)
Position the disconnect switch to turn electrical power to the system on and off.
Start (1PB)
Push Start to start the system. The system does not start if blower or airlock
motor overloads have tripped out.
Emergency Stop (2PB)
Push Emergency Stop to completely stop system functions in an emergency.
Do not use it for normal system shutdown.
Purge Stop (3PB)
Push Purge Stop to shut down the system normally. The system ends vacuum
conveying while allowing the pressure side to empty the cyclone or filter
receiver, blowing material out the pressure side. The automatic shutdown module
in solid state units or purge timer in relay units controls the shutdown period.
Indicators
Power On Pilot Light (1LT)
Power On illuminates when the system energizes.
Purge Pilot Light (2LT)
Purge illuminates when the vacuum unit stops and the rotary airlock and
pressure unit purge the pressure-side material line.
Convey Pilot Light (3LT)
Convey illuminates when the system starts and the vacuum side conveys
material.