ZoneFirst MSS Damper Actuator

MSS is the direct replacement for MCS-3, MCSR, MSR

ZoneFirst MSS Damper Actuator – 24VAC Power Closed / Spring Return Open, Field Reversible, Silent Operation

Upgrade your HVAC damper control with the ZoneFirst MSS Damper Actuator, a reliable and quiet 24VAC replacement motor designed for precise damper positioning. This 2-wire actuator powers the damper to the closed position and uses a spring return mechanism to open the damper, ensuring fail-safe operation in case of power loss.

The field-reversible design allows easy configuration for either power-to-close or power-to-open applications using the same motor, providing maximum flexibility for various damper types. The MSS actuator is compatible with ZDS, ZDB, RDS, and RTS dampers, making it an ideal replacement for older models including the MSR, RDM, and RDMH motors.

Key Features:

• Brand: ZoneFirst

• Model: MSS

• Voltage: 24VAC

• Operation: Power Closed / Spring Return Open (Fail-Safe)

• Wiring: 2-wire design for easy installation

• Field Reversible: Can be configured in the field to reverse damper action

• Noise Level: Silent operation for quiet environments

• Compatibility: Replacement for MSR, RDM, RDMH motors; fits ZDS, ZDB, RDS, RTS dampers

• Application: HVAC damper control for air flow regulation and zone control systems

Ensure dependable and silent damper operation with the ZoneFirst MSS Damper Actuator, engineered for durability, flexibility, and fail-safe performance in commercial and residential HVAC systems.