ZoneFirst MDM-Z Actuator 326058-757 Since this is a Normally

Since this is a Normally Closed (N/C) switch

you must verify the drive ratio or look for an adjustable variable pitch equivalent

preventing carbon tracking and high-resistance connections that often lead to premature terminal failure

Field Versatility: Features reversible rotation

you need direct OEM replacement parts that drop in without the need for field modifications

ZoneFirst MDM-Z Actuator 326058-757 Since this is a NormallyThe ZoneFirst MDM Z Actuator is a professional grade modulating damper motor engineered for high precision airflow regulation in both residential and light commercial HVAC zoning systems. This 24VAC actuator utilizes a floating control signal to provide seamless positioning, ensuring accurate temperature balancing across multiple zones. Designed for power open power closed operation, the MDM Z is a direct replacement motor for ZoneFirst ZDM, RDM, and