ZoneFirst MZA2 Zone Adder 30067439-890 Rinse thoroughly and allow it

Rinse thoroughly and allow it to drip dry completely before re-installation to avoid electrical shorts

This item typically includes the main wall mounting bracket

featuring a calibrated 190°F open temperature to interrupt the burner circuit during over-temperature conditions and a 160°F close temperature for system re-engagement

This prevents short-cycling of equipment while maintaining tight temperature tolerances without the need for manual calibration

Robust Construction: Forged from high-grade brass to withstand high-pressure environments up to 700 PSI

ZoneFirst MZA2 Zone Adder 30067439-890 Rinse thoroughly and allow itThe ZoneFirst MZA2 is a critical expansion component designed specifically for the MZS4 Zone Control Panel, allowing for the seamless integration of two additional HVAC zones. Operating on 24VAC, this zone adder utilizes plug and play connectivity to bridge additional dampers and thermostats into the existing master control logic. For contractors managing larger residential or light commercial zoning projects, the MZA2 eliminates the need for