8" round motorized damper - normally open

Jackson Systems "D" Series round, 2-position motorized dampers are ideal for zone control, make up air, air intake, exhaust air vents, and solar applications. These dampers are shipped to operate as powered closed/spring return open.

FEATURES

• 90º butterfly design
• Heavy duty spiral shell with rolled-in stiffening beads for superior rigidity. Shell has one crimped and one straight end, with side mounted motor control box.
• Damper motors have been tested to 250,000 cycles.
• Motor drive end pivots are made of machined steel for maximum durability and long life.
• Special windings and heavy-duty steel gearing provide for long motor life and easy spring close operation.
• Cross pin drive on the motor shaft provides positive direct drive to damper blade without coupling or set screw, allowing for quick and easy motor change.
• Designed to work with low-pressure systems less than 1" WC
• Driven by a synchronous type, 2-wire, 10VA, 24 volt motor
• Minimum position adjustable.

OPERATION
The powered closed/spring return open version is 2-position, 15 seconds close with power on, and 5 seconds spring open with power off.