Description
The EWC Controls MA-RSD is a 24Vac two-position, spring return damper actuator engineered for dependable performance in residential and light commercial HVAC zoning applications. Designed to work seamlessly within EWC Controls zoning systems, this actuator provides precise, on/off damper control to regulate conditioned airflow to individual zones — improving comfort and energy efficiency throughout the building.
Key Features
- 24Vac operating voltage for compatibility with standard HVAC control systems
- Two-position (open/closed) operation for straightforward zone damper control
- Spring return mechanism ensures fail-safe damper positioning upon power loss
- Compact, low-profile design for easy installation in tight duct spaces
- Compatible with EWC Controls zone control panels and damper systems
- Durable construction built for long-term, reliable operation
Why Spring Return?
The spring return design is a critical safety feature — if power is interrupted, the actuator automatically returns the damper to its default (fail-safe) position without any additional control signal. This protects equipment and maintains system integrity during power outages or control failures.
Applications
- Residential and light commercial HVAC zoning systems
- Forced air duct damper control
- Zone-by-zone airflow management
- Replacement actuator for EWC Controls zoning installations
Specifications
- Brand: EWC Controls
- Model: MA-RSD
- Operating Voltage: 24Vac
- Control Type: Two Position (On/Off)
- Return Type: Spring Return (Fail-Safe)







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