Sterling 6017 series installation manual Electrical Panel and System Components, Air Purge

Electrical Panel and System Components

The pump motor and immersion heater operate on three-phase, 50/60 cycle, nominal voltage with the control circuit at 115 V single phase. The control circuit voltage is provided by a single phase machine tool transformer with primary fuse protection and a grounded secondary. A main power disconnect is included as for ease of service. The electrical panel is UL listed and complies with NEC provisions.

All components are IEC rated for long life and reduced maintenance. The heater elements are branch fused, and protected from contactor welding by a separate primary voltage contactor. The pump motor is controlled by a full voltage magnetic reversing starter, with fused branch circuit overcurrent and thermal overload protection. Many additional features are available as options.

A NEMA 12 enclosure is standard, with NEMA 4 available as an option.

Air Purge

Upon initial start-up and mold/process change-out, you’ll need to purge all air and water from the system. The 6017 unit has appropriate valving to ensure complete purging. Procedures are covered in Chapter 3.

!WARNING

Failure to purge the system of air before heating may result in serious injury or critical system and equipment damage.

Make sure you properly purge the system of air before starting the heater cycle.

6017 Series Hot Oil Large Temperature Control Units Page 13