Ewc Controls END-MA15S-12X8 Nd Motorized Damper 24V

Product Description

The EWC CONTROLS END-MA15S-12X8 is a normally closed (ND) motorized zone damper designed for rectangular duct applications in forced-air HVAC systems. Operating at 24 volts, this damper features a 15-second motor for controlled airflow modulation and includes an LED status indicator for quick visual confirmation during installation and service. The motor is bottom-mounted and uses a 3-wire connection to the actuator. Measuring 12 inches by 8 inches, it fits standard rectangular duct openings in residential and light commercial zoning setups. Licensed HVAC technicians handle installation as part of zone control or air quality system work.

This damper is intended for air quality and zone control applications within forced-air duct systems. Its rectangular form factor makes it suitable for trunk lines and branch runs where directional airflow control is required. The 15-second motor cycle time allows for smooth, measured blade travel, reducing pressure spikes in the duct system. It is compatible with standard 24-volt zone control boards and thermostats used in residential and light commercial zoning systems.

Key Features

• 24-volt operation compatible with standard zone control boards and low-voltage thermostats
• 15-second motor cycle for smooth, controlled blade actuation
• LED status indicator for visual confirmation during commissioning and service
• Bottom-mounted motor for accessible installation in typical duct configurations
• 3-wire motor connection for straightforward wiring to zone panels
• Rectangular shape sized at 12 inches by 8 inches for standard duct fitment

Compatibility

Designed as an OEM-style replacement or new-install motorized damper for 24-volt zone control systems using rectangular duct openings in residential and light commercial forced-air applications.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with low-voltage zoning systems. Power down the zone control panel before wiring the damper to avoid damage to the actuator or control board. Verify duct dimensions match the damper opening before securing to prevent air bypass. Follow local mechanical codes and the zone system manufacturer wiring diagram when connecting the 3-wire actuator leads.

Technical Specifications

• Product Type: ND Motorized Damper
• Size: 12 inches x 8 inches
• Shape: Rectangular
• Voltage: 24 volts
• Motor Speed: 15-second cycle
• Wires to Motor: 3
• Motor Mount: Bottom
• LED Indicator: Yes
• Application: Air Quality / Zone Control

Standard Information

• Brand: EWC CONTROLS
• Manufacturer Part Number: END-MA15S-12X8