For New Refrigerants Phase-In, ZONEFIRST has a Portfolio of A2L Compatible Solutions
ZONEFIRST
10/21/2024
Company’s A2L-compatible products include return damper systems, open-closed damper system and zone panels, among other solutions.
ZONEFIRST, a leading manufacturer of HVAC zone dampers and zoning systems, announces the launch of a new range of products designed to meet the stringent A2L refrigerant regulations. As the HVAC industry transitions towards more environmentally friendly refrigerants, ZONEFIRST’s innovative solutions ensure safe and efficient performance for residential and commercial systems.
The introduction of A2L refrigerants marks a significant shift for the HVAC industry. Classified as mildly flammable, A2L refrigerants have a lower Global Warming Potential (GWP) than traditional options like R-410A. While they support environmental goals and efficiency, their unique properties require enhanced safety measures, such as improved leak detection and ventilation protocols.
With the implementation of A2L refrigerants, HVAC systems must now incorporate built-in leak detection mechanisms. In the event of a leak, the system is programmed to immediately shut down heating and cooling functions while activating the fan to enhance ventilation. For zoned systems, it is crucial that all dampers remain open to facilitate effective air circulation and prevent refrigerant build-up, which could pose safety risks.
HVAC units are also equipped with auxiliary contacts to control external devices, such as zone damper systems, ensuring they respond appropriately to any leak detection alerts.
ZONEFIRST’s new A2L-compliant product are engineered to ensure full compliance with this code while maintaining superior system performance:
- 24V Spring Return Damper Systems: For systems using 24V power-closed, spring-open dampers with H32, MMZ3, or MZS4 panels, the power is routed through the HVAC unit’s leak detection contact. If a leak is detected, the circuit breaks, causing dampers to spring open and the fan to activate.
- Plug-In and 3-Wire Power Open-Closed Damper Systems: For Plug-In and 24V3-Wire dampers, a 4PDR relay disconnects the R wire from each zone thermostat to the panel, stopping all zone calls and opening all dampers. If a leak is detected, the unit’s auxiliary leak detection circuit triggers this relay, deactivating heating/cooling and activating the fan. The panel will need to be in test mode, either with a dip switch or jumper, to eliminate the timing delays and open the dampers immediately.The A2LR is backwards compatible to work with all of our panels and takes less than10-minutes to install.
- Z3 Zone Panels: The new multi-function Z3 and Z3P zone panels simplify A2L integration. Installation is simple - connect the unit's A2L contacts to the panel's sensor terminals, and use the app-based setup for easy configuration via QR code.
“As the HVAC industry continues to evolve towards more sustainable solutions, it’s crucial that we provide products that not only meet regulatory requirements but also enhance system performance and safety. Our new line of A2L-compliant products is a testament to our commitment to innovation and customer safety.”
James Foster
ZONEFIRST Marketing Manager