Danfoss simplifies superheat control in industrial refrigeration

The industrial refrigeration sector, including cold storage, food processing, and HVAC applications, requires precise superheat control to ensure system efficiency, compressor protection, and stable operation. In this context, Danfoss has introduced a new superheat controller designed to simplify installation, improve control accuracy, and support modern refrigerants.

The controller operates with a single 24 V AC/DC power supply and integrates directly with electronic expansion valves, enabling faster deployment and reduced wiring complexity in both new installations and retrofits.

Simplified installation and commissioning
The controller is designed to reduce setup time through a guided commissioning process. An integrated configuration wizard supports parameter setup, allowing technicians to bring systems online with fewer manual adjustments.

Simplified electrical connections using a single low-voltage supply reduce installation complexity and make the system easier to integrate into existing refrigeration architectures. This approach is particularly relevant for multi-unit installations where consistency and speed of deployment are critical.

Precise control and system integration
The system provides 4–20 mA analog input and output for accurate signal handling, enabling precise superheat regulation across varying load conditions. Communication is handled via Modbus RTU over RS-485, allowing integration into centralized control systems and enabling real-time monitoring and control.

This ensures compatibility with industrial automation environments where reliable data exchange and system coordination are required.

Advanced control algorithms for performance optimization
The controller incorporates multiple control algorithms designed to improve system stability and efficiency. These include modulation-based temperature control, minimum stable superheat regulation, load-based adjustment, and suction pressure optimization.

Together, these functions help maintain stable evaporator performance, reduce the risk of liquid refrigerant returning to the compressor, and improve overall energy efficiency under fluctuating operating conditions.

Compatibility with low-GWP refrigerants
The controller supports a range of refrigerants with low global warming potential (GWP), including ammonia (NH₃), carbon dioxide (CO₂), hydrocarbons, and HFOs. This ensures compatibility with current environmental regulations and supports the transition toward more sustainable refrigeration systems.

Centralized configuration and scalability
A dedicated PC-based configuration tool enables replication of settings across multiple units, simplifying system commissioning and ensuring consistency in large-scale installations. This is particularly useful in industrial environments where multiple evaporators or refrigeration circuits must operate under uniform control parameters.

Applications in industrial refrigeration
The controller is suited to:

By combining simplified installation, precise control, and compatibility with modern refrigerants, the controller supports more efficient and reliable operation in industrial refrigeration environments.

Edited by Natania Lyngdoh, Induportals Editor — Adapted by AI.

www.danfoss.com