The ZD series are extruded aluminum parallel blade dampers compete with 24V Power Open/ Power Close Motor. These dampers are shipped complete and ready for installation. The lightweight ZD can be installed in any position in any properly sized duct. These dampers and motor combination are rated for duct pressure up to 2.0” W.C.

Dampers are available in all even sizes from 8”x8” to 36”x24”. All dampers are 1/4” undersized from their listed size. Dampers are ordered as ZDSM for side mount, width by height, as the motor and end plate will be on the smaller dimension, for typical insertion into the side/shorter dimension of the duct. The ZDBM denotes bottom mount and is ordered height by width. The motor and end plate are on the longer dimension for typical insertion into either the bottom or top of the duct. Dampers are ordered as ZDSMwwhh or ZDBMhhww, using 2 digits for each dimension. All ZD dampers are shipped in the Open position ready for installation.

The ZDSM & ZDBM can be used for zone control, fresh air intake, ventilation or as the motorized damper for by-pass air when controlled by the Static Pressure Switch (SPS) or Static Pressure Control (SPC). It is also designed to also handle high velocity air conditioning systems up to 2.0”W.C.

The simple 3 wire motor has two light emitting diodes (LED’s) to indicate the damper position. The RED LED is lit when the damper is closed and the Green is lit when the damper is open. The MDM also has adjustable minimum position stop located under the motor cover. This motor’s energy saving design uses end switches to break power to the motor once the motor reaches the end travel position. This lengthens the motor life and conserves energy. The MDM has been factory tested to over 250,000 cycles.