Eliwell Ewcm 900 S May 2026

Eliwell EWCM 900 S is a specialized controller designed to manage refrigeration machine rooms. It is primarily used for controlling compressor racks (including single, multi-stage, or different capacity units) and condenser fans. Eliwell France Key Specifications : Features 11 relay outputs that can be configured for either compressors or fans.

: Supports two 4–20 mA pressure transducers or two NTC temperature probes for suction and condensing inputs.

: Includes 11 opto-isolated digital alarm inputs linked to the outputs. Connectivity : Equipped with an RS-485 serial port for connection to the Televis monitoring system.

: Standard 72x144 mm flush panel mount housing with a depth of 120 mm. Refrigerants

: Compatible with common gases including R22, R134A, R404A, R407C, and R507. Eliwell France Programming & Operation The controller uses two levels of programming: Operating (oPr) : Accessible by pressing Configuration (CnF) : Accessible by pressing PRG (twice) + UP Eliwell France

The interface includes a double 3-digit display to show probe values and alarm codes, along with dedicated buttons for checking running hours ( ) and compressor maintenance status ( Eliwell France or specific parameter codes for your compressor configuration? EWCM 900/S rel. 5/2000 ing compressors and fans manager

The Eliwell EWCM 900 S represents a pinnacle in control technology for compressor racks. Designed specifically for the demanding environments of commercial refrigeration, this controller provides a sophisticated yet user-friendly interface for managing complex cooling systems. Whether you are an HVAC technician, a system designer, or a facility manager, understanding the capabilities of the EWCM 900 S is essential for optimizing system performance and energy efficiency.

The core strength of the EWCM 900 S lies in its versatility. It is engineered to manage multi-compressor racks with precision, supporting various types of compressors and fan arrangements. This flexibility allows it to be integrated into a wide range of applications, from small grocery store refrigeration units to large-scale industrial cold storage facilities. The controller’s ability to handle up to several stages of suction and discharge makes it a robust solution for diverse operational needs.

One of the standout features of the EWCM 900 S is its focus on energy management. In today’s economic and environmental climate, reducing energy consumption is a top priority. This controller utilizes advanced algorithms to ensure that compressors operate at their peak efficiency. By balancing the workload across multiple units and implementing smart start/stop sequences, the EWCM 900 S minimizes wear and tear while significantly lowering electricity costs. Its integrated floating head pressure control further enhances efficiency by adjusting the system based on ambient conditions.

Installation and configuration are often the most challenging aspects of implementing a new controller, but Eliwell has streamlined this process with the EWCM 900 S. The device features a clear, backlit display and an intuitive menu structure that simplifies the setup procedure. Technicians can easily navigate through parameters to calibrate sensors, set alarm thresholds, and define operational logic. Furthermore, the controller supports connectivity with supervisory systems, enabling remote monitoring and data logging for proactive maintenance and troubleshooting.

Safety and reliability are non-negotiable in refrigeration, and the EWCM 900 S is built to provide peace of mind. It includes a comprehensive suite of protection features, such as high and low-pressure alarms, oil level monitoring, and motor protection. In the event of a fault, the controller can initiate emergency protocols to prevent equipment damage and product loss. The internal memory stores a history of events and alarms, which is invaluable for diagnosing recurring issues and improving long-term system stability.

The EWCM 900 S is not just a controller; it is a comprehensive management system for the heart of a refrigeration plant. By combining precise control, energy-saving logic, and robust safety features, it ensures that compressor racks perform reliably under any load condition. For those looking to modernize their cooling infrastructure, the Eliwell EWCM 900 S stands as a proven, high-performance choice that delivers measurable results in both operational uptime and cost savings.

Eliwell EWCM 900 S: A Comprehensive Guide to the Advanced Refrigeration Controller

In the world of refrigeration, precision and control are paramount to ensuring the optimal storage and preservation of perishable goods. The Eliwell EWCM 900 S is a sophisticated refrigeration controller designed to provide advanced temperature control and monitoring capabilities for commercial refrigeration systems. In this article, we will explore the features, benefits, and applications of the Eliwell EWCM 900 S, as well as its technical specifications and installation requirements.

Introduction to 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 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.

Key Features of Eliwell EWCM 900 S

The Eliwell EWCM 900 S boasts an impressive array of features that make it an ideal choice for commercial refrigeration applications. Some of the key features include:

  1. Precise Temperature Control: The EWCM 900 S provides precise temperature control, with an accuracy of ±0.1°C, ensuring that stored products are maintained at the optimal temperature.
  2. Digital Display: The controller features a large, easy-to-read digital display that shows the current temperature, setpoint, and alarm status.
  3. Data Logging: The EWCM 900 S can log temperature data for up to 100 days, allowing users to monitor temperature trends and identify potential issues.
  4. Alarm Functions: The controller provides comprehensive alarm functions, including temperature alarms, sensor faults, and system errors, ensuring that users are notified of any issues promptly.
  5. Communication Capabilities: The EWCM 900 S features RS485 communication capabilities, enabling users to connect the controller to a network or a PC for remote monitoring and control.
  6. Configurable Inputs and Outputs: The controller has configurable inputs and outputs, allowing users to customize the controller to suit their specific application.

Benefits of Eliwell EWCM 900 S

The Eliwell EWCM 900 S offers numerous benefits to users, including:

  1. Improved Temperature Control: The controller's precise temperature control capabilities ensure that stored products are maintained at the optimal temperature, reducing the risk of spoilage and extending shelf life.
  2. Increased Energy Efficiency: The EWCM 900 S's advanced control algorithms and configurable inputs and outputs enable users to optimize their refrigeration system's performance, reducing energy consumption and costs.
  3. Enhanced Monitoring and Control: The controller's data logging and alarm functions provide users with real-time monitoring and control capabilities, enabling them to respond promptly to any issues.
  4. Reduced Maintenance: The EWCM 900 S's comprehensive alarm functions and data logging capabilities help identify potential issues before they become major problems, reducing maintenance costs and downtime.

Technical Specifications

The Eliwell EWCM 900 S has the following technical specifications:

  1. Power Supply: 230VAC, 50/60Hz
  2. Operating Temperature: -10°C to 50°C
  3. Storage Temperature: -20°C to 70°C
  4. Humidity: 20 to 80% RH
  5. Input Type: NTC, PTC, or 4-20mA
  6. Output Type: Relay or 4-20mA

Installation Requirements

The Eliwell EWCM 900 S is relatively easy to install, but it does require careful consideration of the following factors:

  1. Mounting: The controller should be mounted in a secure, easily accessible location, away from sources of heat or moisture.
  2. Wiring: The controller's wiring should be installed in accordance with local electrical regulations and codes.
  3. Sensor Installation: The temperature sensor should be installed in a location that provides accurate temperature readings, such as in the evaporator or in the refrigerated space.

Applications

The Eliwell EWCM 900 S is suitable for a wide range of commercial refrigeration applications, including:

  1. Walk-in Coolers and Freezers: The controller's precise temperature control and data logging capabilities make it an ideal choice for walk-in coolers and freezers.
  2. Display Cases: The EWCM 900 S's configurable inputs and outputs and comprehensive alarm functions make it suitable for display cases, including glass-door merchandisers and refrigerated display cabinets.
  3. Cold Storage Rooms: The controller's advanced control algorithms and communication capabilities make it suitable for cold storage rooms, where precise temperature control and monitoring are critical.

Conclusion

The Eliwell EWCM 900 S is a sophisticated refrigeration controller designed to provide advanced temperature control and monitoring capabilities for commercial refrigeration systems. Its precise temperature control, data logging, and alarm functions make it an ideal choice for a wide range of commercial refrigeration applications, including walk-in coolers and freezers, display cases, and cold storage rooms. By understanding the features, benefits, and technical specifications of the EWCM 900 S, users can optimize their refrigeration systems' performance, reduce energy consumption, and improve product safety and quality.

The Eliwell EWCM 900/S is a specialized series of controllers engineered specifically for managing machine rooms within complex refrigeration systems. Acting as a central "brain," this device coordinates both the compression and condensation phases, ensuring that multiple units—ranging from single-stage to multi-stage compressors of varying capacities—operate in harmony with condenser fans. Advanced Control and Flexibility eliwell ewcm 900 s

One of the defining characteristics of the EWCM 900/S is its high degree of configurability. It features up to 11 relay outputs that can be assigned to manage different resources based on the specific needs of the plant.

Compressor Management: The controller is capable of handling various compressor types, including reciprocating models with different power levels and stepped capacities (partialisations).

Adaptable Inputs: 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.

Operational Modes: It offers "normal" and "economy" setpoints, which can be toggled to optimize performance or energy use. System Reliability and Safety

Safety and uptime are critical in industrial refrigeration, and the EWCM 900/S Go to product viewer dialog for this item. includes several features to safeguard the machine room:

Integrated Alarm System: Each compressor is combined with its own alarm circuit, alongside global management for high and low pressurestat alarms.

Emergency Backup: A continuous diagnosis system monitors the controller itself. In the event of a malfunction, it can transfer control to a dedicated emergency system to maintain plant operations.

Maintenance Tools: Built-in functions allow technicians to reset running hours for individual compressors or modify the "available" status of units during servicing. Connectivity and Technical Specifications Designed for professional environments, the EWCM 900/S

is built into a black ABS plastic housing meant for flush panel mounting. It supports a wide range of common refrigerants, including R134A, R404A, and R507.

For modern facility management, the device includes an RS-485 serial port, enabling it to connect directly to Eliwell’s Televis supervision system for remote monitoring and data logging. This allows maintenance personnel to access system variables and adjust parameters without being physically present in the machine room. EWCM 900/S rel. 5/2000 ing compressors and fans manager

The Eliwell EWCM 900/S Go to product viewer dialog for this item.

is a specialized electronic controller designed for the comprehensive management of machine rooms within refrigeration systems. It primarily serves as a centralized hub for controlling compressors and condenser fans, ensuring efficient operation and system protection. Core Functionality and Design EWCM 900/S

is engineered to handle various compressor configurations, including single units, multi-stage systems, and units with different capacities or stepped powers. Its versatility allows it to manage homogeneous reciprocating units as well as more complex, non-homogeneous setups.

Output Capabilities: The device features 11 relay outputs that are fully configurable to control different system resources like fans and compressors.

Sensor Inputs: It supports inputs for pressure or temperature sensors, typically using NTC probes or 4…20 mA pressure transducers for both suction and head pressure monitoring.

Physical Build: It is housed in a black ABS plastic casing designed for flush panel mounting, with dimensions of approximately 72x144 mm and a depth of 120 mm. Advanced Features Beyond basic control, the EWCM 900/S

integrates several advanced features to enhance system reliability and performance:

Alarm Management: Each compressor is linked to a dedicated alarm circuit, and the controller provides high/low pressure protection.

Energy Optimization: It includes a clock for setting different operation setpoints during various time periods, such as "Normal" or "Economy" modes to reduce energy consumption.

Refrigerant Compatibility: The unit comes pre-loaded with conversion charts for common refrigerants like R22, R134A, R404A, R407, and R507.

Diagnostics: A continuous self-diagnosis system monitors the controller's health. In case of failure, a dedicated breakdown relay can transfer control to an emergency system. Programming and Interface

The controller uses a dual-level programming interface: an Operating ("oPr") menu for daily adjustments and a Configuration ("CnF") menu for deep system setup. Users can navigate these via the front keypad, which includes a double 3-digit display to show real-time data like compressor status and run times. For integration into broader monitoring networks, it features an RS-485 serial port for connection to the Eliwell Televis system. EWCM 900/S rel. 5/2000 ing compressors and fans manager

The query "eliwell ewcm 900 s" — make piece appears to be a fragmented or non-standard request.

Based on technical knowledge:

Since you didn’t ask a clear question, I can offer the most likely useful interpretation:

If you need documentation / wiring / parameters for the EWCM 900 S, here is the standard approach:

  1. Go to the official Eliwell support site (now under Schneider Electric’s “Eliwell” archives).
  2. Search for “EWCM 900 S user manual” or “installation guide.”
  3. The manual typically includes:
    • Physical dimensions and mounting
    • Wiring diagram
    • Parameter list (accessible via front keypad)
    • Input/output configurations (e.g., NTC/PTC/0-10V/4-20mA)
    • Relay ratings

If you mean you need a replacement part (e.g., “make piece” = make a replacement piece):

To give you an exact answer, please clarify: Eliwell EWCM 900 S is a specialized controller

Eliwell EWCM 900/S is a specialized controller designed for managing compressor racks and condenser fans in industrial refrigeration machine rooms. It is known for its versatility in handling various compressor configurations—from single-unit setups to multi-stage systems and compressors with varying capacities. Eliwell France 🛠️ Key Technical Specifications

: 11 configurable relay outputs (6A 250V AC) for compressors and fans. Suction & Discharge

: Programmable for 4–20 mA pressure transducers or NTC temperature probes.

: 11 optoisolated digital alarm inputs that match the supply voltage. Pressurestats : Dedicated inputs for high and low pressurestat alarms.

: Flush panel mount, 72x144 mm dimensions, with a double 3.5-digit display. Connectivity : Native RS-485 port for integration with the Eliwell Televis supervision system. Refrigerant Support : Compatible with R22, R134A, R502, R404A, R407, and R507. Eliwell France 🌟 Top Features & Functionality Adaptive Control

: Manages "homogeneous" compressors (same power) via rotation to balance wear, or "heterogeneous" setups based on specific capacity needs. Dual Operating Modes

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

that activates if the controller hardware fails, handing control to a basic emergency backup system. User Interface

: Real-time display of suction and condensing values, status LEDs for fans, and an alarm light for immediate diagnostic feedback. Eliwell France ⚖️ Performance Review High Flexibility

: The ability to mix compressor types and sizes within the same rack is a major advantage for custom-built systems. Comprehensive Diagnostics

: 11 dedicated alarm inputs allow for precise pinpointing of which component in a large rack has failed. Ease of Monitoring

: Direct Bar/PSI or °C/°F conversion on the display simplifies maintenance without needing external conversion charts. Eliwell France Sensor Sensitivity

: Some users have reported issues with NTC probe recognition, sometimes requiring specific PTC alternatives depending on the firmware version. Legacy Design

: While reliable, the 900/S is part of an older series. Modern "9000 PRO" models offer more advanced inverter-specific algorithms and CO2 transcritical support. Диалог специалистов АВОК 🏗️ Typical Applications Eliwell EWCM 900/S

The Eliwell EWCM 900 S is a microprocessor-based controller specifically engineered for managing the machine rooms of refrigeration systems, primarily focusing on compressor racks and condenser fans. Designed for industrial and commercial environments, this series provides a centralized solution for controlling complex refrigeration circuits, including single-unit or multi-stage systems. Key Technical Specifications The Eliwell EWCM 900 S

features a robust physical design and a wide range of I/O capabilities tailored for demanding refrigeration applications:

Physical Housing: Built in a black ABS plastic container measuring 72x144 mm with a depth of 120 mm.

Mounting: Designed for flush panel mounting using a 67x136 mm cut-out.

Power Supply: Typically operates on 230V AC (with 24V available upon request).

Relay Outputs: Equipped with 11 configurable relay outputs (6A 250V AC) used to manage various stages of compressors and fans.

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

Refrigerant Compatibility: Pre-configured with conversion charts for standard refrigerants including R22, R134A, R502, R404A, R407, and R507. Operational Features and Functionality

The EWCM 900/S manual highlights several advanced functions that enhance the efficiency and safety of a refrigeration plant:

Compressor Management: It can control multiple compressors of varying capacities, including reciprocating types with stepped-capacities (partializations).

Condenser Fan Control: Manages fans based on head pressure or temperature to ensure optimal condensing phases.

Dual Setpoints: Features a clock function that allows users to toggle between "normal" and "economy" setpoints for energy saving during specific time periods.

Diagnostic & Safety System: Includes a continuous self-diagnosis routine. In the event of a controller failure, a dedicated breakdown relay can transfer control to an emergency system to prevent plant downtime.

Monitoring: The front panel features a dual 3-digit display and LED indicators for compressor status, alarm conditions, and running hours. Connectivity and Integration Eliwell Ewcm 900 S Access Precise Temperature Control : The EWCM 900 S

The Eliwell EWCM 900 S is a type of controller used in refrigeration systems, particularly in commercial and industrial settings. Here's some general information about it:

The Eliwell EWCM 900 S is a microprocessor-based controller designed for managing refrigeration systems, including those with multiple compressors and fans. It's known for its flexibility, reliability, and user-friendly interface.

Some key features of the Eliwell EWCM 900 S include:

The Eliwell EWCM 900 S is often used in various applications, such as:

This controller is part of the Eliwell product line, which is a well-known brand in the refrigeration control systems market. Eliwell products are designed to provide efficient, reliable, and easy-to-use solutions for managing refrigeration systems.

If you're looking for more specific information or technical details about the Eliwell EWCM 900 S, I recommend consulting the official Eliwell documentation or contacting a refrigeration control systems expert.

The Eliwell EWCM 900/S Go to product viewer dialog for this item.

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. Technical Specifications

Physical Dimensions: 72x144 mm (front panel), with a 120 mm depth. Mounting: Flush panel mount requiring a 67x137 mm cutout.

Power Supply: Typically 230V AC (50/60 Hz), with some 24V variants available upon request. Inputs:

Sensors: Two 4–20 mA pressure transducers or NTC temperature probes for suction and condensing.

Digital: 11 optoisolated alarm inputs corresponding to the supply voltage.

Outputs: 11 configurable relay outputs (6(3)A 250V AC) for compressors and fans.

Communication: Integrated RS-485 port for connection to the Televis System.

Supported Refrigerants: R22, R134A, R502, R404A, R407, and R507. Core Features & Functionality

Dual Management: Controls both the compression and condensation phases by managing compressors and condenser fans simultaneously.

Advanced Control: Features dedicated algorithms for energy saving and inverter-control management.

Alarm System: Includes global alarm and safety relay outputs, plus specialized high/low pressurestat alarm management for both compressor and fan sections.

User Interface: Dual display (4-digit for suction, 3-digit for condensing) showing probe values and alarm codes.

Programming: Two levels of access—Operating ("oPr") and Configuration ("CnF")—secured by passwords. Market Availability & Pricing

This model is often available as a refurbished or used component for legacy system maintenance.

Classic Automation: Offers refurbished units in stock for approximately $790.00.

eBay (tech-automation): Lists used units for approximately $389.00 $369.55.

HOS BV: Provides used and new units with optional testing and refurbishing services. New Eliwell EWCM 900/S - HOS BV

Description for Eliwell EWCM 900/S New Eliwell EWCM 900/S controller. Power supply 50/60 Hz: 220 Vac. Alarm inputs: 220 Vac. Used Eliwell EWCM 900/S - HOS BV

* search. Select or advice. * Transparent estimate. * Test / Refurbish. * Test reporting. * Logistics and transport. EWCM 900/S rel. 5/2000 ing compressors and fans manager

5. Energy Efficiency

With rising energy costs, the controller’s efficiency features are vital. The unit supports "Eco" modes and Night & Day setpoints, allowing the system to relax temperature constraints during non-operational hours (like overnight) to save significant power.

4. Direct Access Parameters

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.

Product Spotlight: The Eliwell EWCM 900 s – Precision Cooling for Professional Applications

In the world of commercial refrigeration and HVAC, the controller is the brain of the system. A malfunctioning or imprecise controller can lead to spoiled inventory, energy waste, and system failure. Today, we are taking a close look at the Eliwell EWCM 900 s, a controller that has become a staple for technicians and business owners requiring reliability and versatility.