Eliwell Ewcm 900 S |link| Jun 2026

is a specialized electronic controller designed for managing compressor and fan sections in industrial refrigeration machine rooms. It supports complex configurations, including homogeneous and non-homogeneous reciprocating compressor units with multiple power stages.

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Supports NTC or 4...20 mA pressure transducers for suction and head pressure Pre-configured for R22, R134A, R502, R404A, R407, and R507 Power Supply Typically 230V AC or 220V AC depending on model Display eliwell ewcm 900 s

Reliability is the key metric. The EWCM 900 s is built to handle the electrical noise and harsh environments often found in commercial kitchens and industrial settings. Its precise temperature control minimizes food safety risks.

: 72x144 mm (front panel), with a 120 mm depth. Mounting : Flush panel mount requiring a 67x137 mm cutout. is a specialized electronic controller designed for managing

Based on technical knowledge:

Supports PWM (Pulse Width Modulation) or 4-20mA/0-10V analog outputs to control variable-speed EC fans or inverter-driven fan motors. Energy Saving Algorithms This link or copies made by others cannot be deleted

Whether you are configuring an older system or maintaining an existing enterprise install, understanding the architecture, parameter maps, and wiring of the EWCM 900 S is vital for modern HVAC/R technicians. Key Technical Specifications

Using the front keypad, technicians can split parameters into "User" (setpoint, differential) and "Programming" (defrost type, probe calibration, output configuration) levels, secured by a password.

Compressor safety loop monitoring (oil level, thermal protection).