Copeland XM679K Controllers for Multiplexed Cabinets

Key Features and Applications

The XM679K is a microprocessor-based controller suitable for medium and low-temperature applications. It supports LAN connectivity for up to eight sections, allowing for flexible system configurations. The controller features multiple relay outputs for managing solenoid valves, defrost cycles (electrical or hot gas), evaporator fans, lighting, and alarm functions. It also includes an output for driving pulsed electronic expansion valves and multiple probe inputs for precise temperature and superheat control.

Installation and User Interface

Installation guidelines are provided, including recommended mounting for the CX660 or CH660 keyboard displays. The document outlines the operating temperature range and environmental considerations for optimal performance. The user interface section details the icons and keyboard commands for easy navigation and parameter adjustment.

Programming and Operation

Learn how to program parameters, including accessing PR1 and PR2 levels, and modifying settings for temperature regulation and superheat control. The guide explains different operating modes, such as manual and self-adaptive superheat control, and details functions like synchronized defrost, on-demand defrost, and fan control.

Technical Specifications and Connectivity

The document includes a comprehensive parameter list, digital input configurations, and technical data. It also covers connectivity options, including Hotkey programming and RS485 serial output for MODBUS-RTU communication, enabling integration with systems like XWEB.

For more information, visit the Copeland website.