027 04299 003 York Damper Actuator (NMB24-MFT)

Overview

The York 027 04299 003 (Belimo NMB24-MFT) is a non-spring return damper actuator designed for proportional modulation in commercial HVAC systems. Utilizing Multi-Function Technology (MFT), this actuator provides a minimum of 90 in-lb of torque to control damper surfaces up to 22 square feet. Its direct-coupled design and programmable nature make it a versatile solution for precise air flow management in building automation environments.

Features

• Multi-Function Technology (MFT) allows for field customization of control signals, feedback, and running time
• Brushless DC motor provides reliable, maintenance-free operation and a long service life
• Electronic overload protection throughout the 0 to 95 degree rotation prevents damage without the need for mechanical limit switches
• Manual override via an external push button allows for easy manual positioning and system testing
• Universal shaft clamp supports direct mounting to a variety of damper shaft sizes from 1/2 inch to 1.05 inches
• Visual position indicator provides clear status of the actuator’s rotation angle

Specifications

• Torque: 90 in-lb (10 Nm)
• Power Supply: AC 24 V, 50/60 Hz; DC 24 V
• Power Consumption: 3.5 W (Running), 1.3 W (Holding)
• Transformer Sizing: 6 VA
• Control Signal: Programmable (Default 2-10 VDC; 4-20 mA with resistor; PWM; Floating Point)
• Feedback Signal: 2-10 VDC (Default)
• Running Time: Default 150 seconds (Adjustable from 45 to 170 seconds)
• Angle of Rotation: Max 95 degrees, adjustable with mechanical stops
• Enclosure Rating: NEMA 2, IP54
• Ambient Temperature Range: -22 to 122 F (-30 to 50 C)

Applications

• Proportional modulation of dampers in typical commercial HVAC air handling systems
• Control of large damper surfaces up to 22 square feet in building automation systems
• Retrofit projects requiring integration with varied control signals like PWM or floating point
• Variable air volume (VAV) terminal units and classroom unit ventilators