A single blade round damper with a (2) two position, 24 volt motor. The motor is powered both ways - powered open and powered closed. The motor features LED's that indicate the position of the motor whether open or closed. The LED's are colored RED for closed and GREEN for open. These indictors are a failsafe measure meaning that they will not illuminate until the blade of the damper has gone to its full open or full closed position. The motor is a 3 wire hook-up with a common, a power open leg and a power closed leg.
EWC® Motorized Damper, Series: URD Series, 9 in Dia Size, 24 V, 50/60 Hz, 1 W, 1.5 VA Rating, Double Layered Blade, 24 ga, Steel, Galvanized, Power Closed/Power Open Motor, 2-3/4 in W Motor Specifications, Round Shape, 310 cfm, 35 s, 18 in-lb Torque, 1.5 in-WC, 12 in L x 12 in W x 12 in H
| CFM Rating | 310 cfm |
| Motor Type | Power Open, Power Closed |
| Pressure Rating | 1 in-WC Maximum |
| Series | URD Series |
| Temperature Rating | -20 to 160 deg F Ambient |
| Torque Rating | 18 in-lb |
| Material | Steel |
| Finish | Galvanized |
| Motor Specifications | 24 VAC at 50/60 Hz, 1.5 A |
| Shape | Round |
- A double layered blade design with an integrated poron sealing gasket
- The superior design ensures long life and zero maintenance
- Easy to install, easy to wire up
- The nylon bearings and ThermoTuff drive shafts ensure smooth, quiet operation and provide a thermal barrier to the motor
- The MA-ND5 motor features bright green and red LEDs which correspond to the open and closed position of the blade
- The motor also includes adjustable end stops for min/max blade position, that allows for field balancing of the full or minimum cu-ft/min flow, into a particular zone or area
- The position LEDs will illuminate regardless of the end stop positions
- Simple three wire hook-up


Specification Sheet