AEC VacTrac Series Conveying Systems - Manual (Page 63)

Note: The Demand/Level sensor is not designed to be connected to a load. Do not
connect external devices to the sensor wires.
This switch is designed for signal load only.
Connecting the sensor to a load VOIDS YOUR WARRANTY!
If the switch is not providing a signal to the controller, check the following:
1. Check that the proper wire connections are made.
• Secure the connections.
2. Make sure that the switch is not connected to any external load device.
• Disconnect the load device, connect wiring to the system controller
only.
3. Consult with ACS Service Engineers for proper switch/magnet spacing.
Once the vacuum receiver and Demand Switch has been properly oriented, complete the
installation by performing the following:
1. Run a bead of silicone sealant around the mounting flange before seating the vacuum
receiver. This makes a better seal.
2. Use nuts and screws to mount the hopper. Nuts and bolts can loosen, fall off, and
damage process equipment.
3. Check across the mounting flange with a bubble level. A level installation is
important for proper operation.
4. Properly ground all vacuum receivers.
Adjusting the Vacuum Receiver Counterbalance
TF and VF Models Only
The counterbalance is factory-adjusted, but may have moved during shipment. To adjust the
vacuum receiver counterbalance:
1. Loosen the set screw on the counterbalance. Move the counterbalance so the flapper
opens from 3 /
16
” (4 mm) to 1 /
4
” (6 mm) on the end opposite the pivot. Re-tighten the
set screw.
2. Apply removable thread locking compound to the set screw and re-tighten.
Installing the Pickup Probe
Pickup probes (See Figure 24 on page 46 for an example) are used to empty gaylords or bulk
material containers located beside the processing machine. A conveying system can use
horizontal take-offs or vertical pickup probes (or a combination of the two) to supply material
to the vacuum receivers. To ensure maximum conveying rates by your system, take the
following into consideration:
•
• Locate the supply container near the vacuum receiver.
Connect the pickup probe to a vacuum hopper material inlet tube with a minimum
amount of tubing, bends, and flex hose.
Conveying System Mechanical Components Chapter 3: Installation 62 of 136