Chapter 2: Functional Description

2-1 Models Covered in This Manual

This manual provides operation, installation, and maintenance instructions for 2-Pump, 20- Station Conveying Controllers. Model numbers are listed on the serial tag. Make sure you know the model and serial number of your equipment before contacting the manufacturer for parts or service.

The 2-Pump, 20-Station Conveying Controller is a programmable logic controller, with 24 VDC or 115 VAC control circuit, easy-to-use touchscreen operator interface terminal and optional audible/visual alarm.

2-2 General Description

Our material conveying systems create vacuum for the automatic conveying of most free- flowing, dry, pelletized, or granular materials. Material characteristics determine the type of equipment needed to convey the material.

A typical use for our equipment is an in-plant distribution system for plastic processing plants.

Our central vacuum systems are as varied as the applications they service. The tubing and equipment furnished in our system is designed to convey the material(s) specified at the time of purchase at specific rates and distances.

We can advise you on your system capabilities based on system makeup, distance, material, and conveying rates you want.

System capacity is directly affected by the pressure drop in the overall system, such as number of material line bends, pipe length, Y-tubes, T-tubes, etc.

Use the minimum effective amount of vinyl flex hose to maximize material line efficiency. Keep material lines as straight as possible. Refer to the Mechanical Components Product manual (Part No. A0536580) for installation recommendations.

2-3 Standard Features

Mechanical Features

Time-fill Capability. The time a station’s vacuum valve remains open to allow material to be drawn into its receiver.

Volume-fill Capability. The vacuum valve will close when material covers the station’s volume-fill proximity sensor or the time entered elapses, whichever comes first.

Pump Blowback Filter Cleaning Outputs. When this feature is enabled, the controller periodically sends air backward through the pump’s air filter to dislodge accumulated dust and debris.

Electrical Features

115/1/60 supply voltage

24 V DC control voltage or 115V AC control voltage.

Single-point power and ground connection

2 –Pump 20-Station Controllers

Functional Description

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Sterling Plumbing scc2 Functional Description, Models Covered in This Manual, General Description, Standard Features