The latest addition to KE2 Therm’s refrigeration controls suite, the KE2 Compressor Sequencer is tailored for small to mid-sized rack applications. It eliminates the need to use overly complicated controls that are designed for larger systems.
The KE2 Compressor Sequencer replaces aging rack controllers or can retrofit racks with existing mechanical controls. The controller supports up to five stages of loading through its onboard relays. Each relay can be configured as the rack’s: Fixed Speed Compressor, Compressor Unloader, Digital Scroll Compressor, Master Liquid Line Solenoid, or Hot Gas Defrost Relay.
When applied to racks with compressors all of equal horsepower, the controller will automatically distribute the runtime equally among the compressors.
Compressors can also be of various HP. When more than one HP is selected, the controller will use the stage with the smallest capacity, to maintain consistent suction pressure.
The KE2 Compressor Sequencer includes KE2 Therm’s Master View web pages, allowing technicians to quickly and easily assess the system’s operation, and review historical performance through onboard data logging.
The compressor sequencer works as a stand-alone rack controller, or in conjunction with KE2 Evaporator for Rack Efficiency controllers. When applied with the KE2 Evaporator Efficiency controllers the KE2 Compressor Sequencer can limit the amount of defrost load, as dictated by the site’s electrical requirements.