EWC Controls 20X10 ND 20" L X 10" H Motorized Damper Spring Return - Normally Open

Model ND-RSD is a rectangular parallel blade damper constructed from heavy duty extruded aluminum with nylon bearings for quiet operation. The Motor Actuator is a 24vac ( Synchronous motor. It is typically a Power Close / Spring Open construction. The damper can be ordered as Power Open / Spring Close. The Model ND-RSD cannot be field-reversed. The motor can get very warm when energized/stalled for extended time periods. To avoid overheating, do not insulate or encapsulate the motor housing. Doing so will damage the actuator assembly and void the warranty. 6watt / 8va) Synchronous See reverse side for wiring solutions.

• ConstructionHeavy Duty extruded aluminum.
• Nylon Bearings for quiet operation.
• Overlapping parallel blades for low leakage.
• Power open/Power closed.
• Designed to operate at static pressures up to 1.5” w/ less than 5% Leakage.
• UL Listed Motor Actuator is a 24vac 3 wire power open/ power close type rated at 18”lbs. of torque.
• NEMA1 Rated Housing.
• End-Stops for Min/Max Travel Adjustments.
• LED’s Indicate damper position.