Eliwell Ewcm 900 S

The Eliwell EWCM 900 S is a microprocessor-based controller designed for use in commercial refrigeration applications, including walk-in coolers, freezers, and display cases. The controller features a user-friendly interface and provides precise temperature control, defrost management, and alarm functions. The EWCM 900 S is designed to be easy to install, program, and maintain, making it an ideal choice for refrigeration professionals.

The EWCM 900 S can manage several compressors and condenser fans simultaneously. It supports various control configurations:

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Manages the cycling, staging, and modulation of compressors based on suction pressure or temperature.

The is a highly specialized, microprocessor-based controller designed for the centralized management of machine rooms in commercial and industrial refrigeration systems. Developed by Eliwell, a market leader now integrated into the Schneider Electric group, this controller serves as the operational brain for managing compressor racks and condenser fans. It optimizes thermodynamic performance, maintains precise pressure parameters, and protects mechanical hardware from premature wear. eliwell ewcm 900 s

mitigates this through Proportional-Integral-Derivative (PID) control. This mathematical approach allows the controller to predict temperature trends and make micro-adjustments before the system drifts too far from the setpoint. Furthermore, the inclusion of "Floating Condensing Pressure" control allows the system to adjust its setpoints based on ambient outdoor temperatures. On cooler days, the system reduces the work required by the compressors, leading to a drastic reduction in electrical consumption—a necessity in an era of rising energy costs and carbon footprint regulations.

: It can control single units, multi-stage systems, or compressors of varying capacities. High Output Capacity : The unit features 11 relay outputs that can be configured for both compressors and fans. Intelligent Safety Systems Emergency Backup

uses 11 configurable relay outputs to manage these resources effectively.

Dedicated high/low pressure switch inputs, compressor safety trips, and external alarm triggers. The Eliwell EWCM 900 S is a microprocessor-based

Designed for flush panel mounting (cutout 67x137 mm).

The Eliwell EWCM 900 S remains a benchmark in the refrigeration control industry. Its robust construction, versatile I/O, and sophisticated defrost/alarm logic make it a cost-effective solution for anyone needing more than a basic thermostat.

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: Features a clock function that allows users to toggle between "normal" and "economy" setpoints for energy saving during specific time periods. The EWCM 900 S can manage several compressors

Set the High Pressure alarm limit ( AHP ) and Low Pressure alarm limit ( ALP ).

The unit uses password protection (parameter Pso ) to prevent unauthorized changes to configuration.

Usually 12Vac/dc, 24Vac/dc, or 230Vac (depending on sub-model variant) Panel mounting (standard cut-out) or DIN-rail options Analog Inputs

: Supports "Normal" and "Economy" setpoints to optimize energy consumption during off-peak hours. Fail-Safe Redundancy : Includes a Safety Relay

: Supports NTC temperature probes or 4…20 mA pressure transducers for both suction and head pressure monitoring.