Zonefirst ZDB-12X12 12HX12W Parallel 24V 2-Pos S/R R-410A while the high-side range operates

while the high-side range operates between 100 psi and 425 psi with a fixed 65 psi differential

the internal electromagnet in the valve may be faulty

6-ton capacity OEM component engineered to manage refrigerant flow in high-demand heat pump systems

eliminating mounting headaches

Zonefirst ZDB-12X12 12HX12W Parallel 24V 2-Pos S/R R-410A while the high-side range operatesThe Zonefirst ZDB 12X12 is a professional grade 12x12 zone damper engineered for robust airflow management in residential and light commercial HVACR systems. Built with a heavy duty extruded aluminum frame and 3 inch parallel blades, this bottom mount zone damper features a 24V spring return motor that ensures fail safe operation by defaulting to the open position during power loss. The low voltage HVAC actuator utilizes a synchronous hysteresis