The ZD is a power close and spring open damper. It has a 24-volt motor used to control circulating air in HVAC systems and used when a normally-open damper is required. The ZD is typically used with the TrueZONE and other electronic zoning systems.
Mechanical visual position indicator for damper status|Solid construction using extruded aluminum frame and blades|Parallel blade design for low leakage performance|Simple, easy-to wire, two wire installation with a third wire option M4 for LED open only light|Reliable, strong, 24 V spring return motor|Fail-safe, normally open operation|Ordering Instructions: Order ZD (dimensions 1) x (dimensions 2), (motor is always mounted on dimensions 2 side) for example, ZD10x8 is a 10 in x 8 in damper with the motor on the 8 in side, but a ZD8x10 is an 8 in x 10 in damper that has the motor on the 10 in side|Damper can be installed in any orientation (mounting side can be on either the bottom or the side of the duct)|Motor or actuators mounting - side or top|30 sec power closed/10 sec spring return
Honeywell Home TrueZONE Residential Damper, Series: ZD Series, 10 in H x 20 in W Size, Rectangle Shape, 24 VAC, 0.32 A, 90 deg Rotation, 30 s Timing, Parallel Blade Action, Power Open/Spring Closed Motor, M1-Power/M6-Common/M4-LED Indication Terminal Electrical Connections, 32 to 120 deg F, Aluminum, Import