Description
The ZoneFirst MDM-Z is a professional-grade damper actuator engineered for reliable, precise airflow control in HVAC zoning applications. Designed to operate on a 24Vac power supply with a floating control signal, this power open/power closed motor ensures positive damper positioning in both directions — delivering consistent performance even in demanding commercial and residential zoning systems.
Key Features
- 24Vac operating voltage for compatibility with standard HVAC control systems
- Floating signal control for accurate, proportional damper positioning
- Power open and power close operation for positive, reliable damper actuation in both directions
- Built-in end switches for automatic limit detection and system feedback
- Adjustable minimum damper position to maintain required minimum airflow and prevent over-restriction
- Compact, durable motor design suited for zone damper applications
Benefits
- Positive two-way actuation eliminates reliance on spring-return mechanisms, improving long-term reliability
- Built-in end switches simplify wiring and reduce the need for external limit controls
- Adjustable minimum position setting ensures code-compliant minimum airflow in occupied zones
- Compatible with ZoneFirst zone control boards and a wide range of third-party HVAC zoning panels
- Ideal for use with round, rectangular, and parallel blade zone dampers
Application
The MDM-Z is the ideal replacement or new-installation actuator for residential and light commercial HVAC zoning systems. Its floating signal input makes it compatible with virtually all modern zone control boards, while the adjustable minimum position feature supports ASHRAE ventilation requirements and helps protect equipment from low-airflow conditions.
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