Honeywell Modulating Automatic Round Dampers (MARD) Are 24V AC, Floating-Control Type Modulating Motors For Bypass And Zone Damper Control.
Generally used in light commercial applications on systems larger than 5 tons that do not exceed 2" W.C. at the damper, but may be used in any residential system as well. When used as a bypass damper, it is controlled by the Static Pressure Control pressure switch. Single-blade. Modulating automatic round dampers are power open, power closed using an included ML6161 actuator.