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Conveying System Mechanical Components Chapter 3: Installation 59 of 138
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 have 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.
Installing the Pickup Probe
Pickup probes (See Figure 20 on page 43 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.
• Secure the flex hose at the probe and the material inlet with hose clamps. Be sure to
avoid loops and kinks, and install grounding wire around the outside of flex hose to
prevent static built-up. Make sure you ground both ends of the grounding wire.
• Put the pickup probe in the material supply. The burrowing action of the probe
provides a steady flow of material.
• To vary the convey rate, cover or open the vent holes on the pickup probe as needed
with the inlet tube.
• If your material bridges frequently and triggers No-Convey alarm conditions, you
should consider using a gaylord tilter or tilter/jogger to supply a steady stream of
material to your conveying system.
• Container tilters are recommended for complete cleanout of gaylords.