Set the Lower and Higher setpoint limits to maintain safe operating pressures.
The EWCM 900 S is a designed specifically for refrigeration and air conditioning applications. Unlike basic temperature controllers, it is a versatile instrument capable of managing compressors, fans, defrost cycles (electric or hot gas), solenoid valves, and alarm systems—all within a single, compact unit.
: Sets the number of available compressors and their power steps. Troubleshooting Error Codes: eliwell ewcm 900 s
The Eliwell EWCM 900 S is a high-performance controller designed specifically for managing medium to large compressor racks. It controls both compressors and condenser fans, ensuring that the cooling load exactly matches the system demand.
High-capacity relay outputs for direct control of compressors and condenser fans. Set the Lower and Higher setpoint limits to
Two 4…20 mA pressure transducers OR two NTC temperature probes
: It supports both pressure and temperature inputs. Suction and head pressure can be monitored via 4–20 mA transducers or NTC probes , depending on the model. : Sets the number of available compressors and
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 provides precise temperature control, data logging, and alarm functions to ensure the safe and efficient operation of refrigeration systems. The EWCM 900 S is part of Eliwell's extensive range of refrigeration controllers, which are renowned for their reliability, accuracy, and ease of use.
Eliwell EWCM 900/S a specialized series of controllers designed to manage the machine rooms of refrigeration systems . It acts as a comprehensive manager for both compressors (single units, multi-stage, or varying capacities) and condenser fans Eliwell France Key Features and Capabilities Comprehensive Load Management : Features up to 11 relay outputs that can be configured to control compressors and fans. Sensor Versatility : Supports both NTC temperature probes 4…20 mA pressure transducers for monitoring suction and condensing sections. Operational Efficiency Rotating Logic
The user interface and connectivity of the 900 S also reflect the shift toward the "Internet of Things" (IoT) in industrial settings. Equipped with RS485 ports, the device integrates seamlessly into monitoring systems like Eliwell’s Televis or standard Modbus protocols. This connectivity allows technicians to monitor the health of a refrigeration plant remotely. Instead of waiting for a manual alarm to be triggered by melting ice cream, a remote operator can see a pressure deviation in real-time and dispatch maintenance before the temperature even begins to rise. This proactive capability transforms maintenance from a reactive "firefighting" task into a controlled, predictive process.