Belimo Refrigerant Monitoring System: A Complete Solution for Safety and Compliance

Refrigerant safety has never been more important. With global regulations tightening and building codes enforcing strict standards, facility managers and engineers must ensure that their HVACR systems meet the highest levels of protection. Belimo’s new refrigerant monitoring system provides a comprehensive solution for leak detection, alarming, and integration, helping buildings comply with ASHRAE Standard 15 and Canada’s CSA B52 code requirements.

At the heart of the system is the new 22G21-5C Refrigerant Gas Monitor, a factory-calibrated device designed to detect a wide range of A1 and A2L refrigerants. It can be configured for a single user-selected refrigerant, with 21 available options such as R134a, R404A, R410A, R454B, and others. This flexibility ensures that the monitor is ready to meet the needs of both current and future refrigeration applications.

The system goes beyond detection by offering a complete package of components required for compliance. Belimo supplies audible and visual alarms, a remote display, and a relay unit for direct control of fans and other external equipment. Together, these devices form a turnkey solution to meet the strict demands of ASHRAE 15 and CSA B52, providing peace of mind that safety requirements are covered from end to end.

One of the standout advantages of Belimo’s refrigerant monitoring system is its ability to operate as either a standalone system or integrate seamlessly into a Building Management System (BMS). The 22G21-5C monitor uses CAN bus communication to network up to 32 devices, and optional communication modules extend compatibility to BACnet MS/TP. This means that facility teams can choose the setup that best fits their infrastructure, whether they need a simple standalone system or a fully integrated solution.

Installation and expansion are also simplified through daisy-chain wiring, reducing complexity and saving valuable labor time. For large-scale facilities or future system growth, this design makes scaling straightforward.

The 22G21-5C refrigerant gas monitor includes its own built-in audible and visual alarms to provide immediate local warning when a leak is detected. To meet full machinery room requirements, the system’s communication modules and relay unit extend this capability by activating the optional external audible and visual alarms and enabling direct control of equipment such as exhaust fans. This ensures both on-the-spot alerts and building-wide protective responses, reducing risks to occupants, equipment, and the environment.

With factory calibration, a broad refrigerant selection, and a 5-year warranty, the Belimo refrigerant monitoring system delivers the accuracy and reliability needed for long-term compliance and safety.

ASHRAE 15 and CSA B52 set strict requirements for refrigerant safety in machinery rooms, and meeting those standards is a critical responsibility for building owners and operators. Belimo’s refrigerant monitoring system provides a complete, reliable, and scalable solution, ensuring compliance without piecing together products from multiple vendors.

By delivering detection, alarms, displays, relays, and integration under one brand, Belimo makes refrigerant safety simple, effective, and future-ready.