Product Overview

PRODUCT DATA
Legacy ZD Series Dampers
APPLICATION
The ZD is a power close, and spring open damper. It has a
24-volt, spring-return, power-closed damper motor used
to control circulating air in heating, cooling and
ventilating systems. It is used when a normally-open
damper is required. The ZD is typically used with the
TotalZone® Systems and other electronic mini-zone
damper systems.
FEATURES
• Reliable spring-return motor.
• Fail-safe, normally-open operation.
• Strong 24-volt spring-return motor.
• Quiet operation with fewer blades.
• Simple, easy-to-wire, two-wire operation.
• Parallel blade design for low leakage performance.
• Easy slip-in design.
• Solid construction using extruded aluminum frame
and blades.
• Can be mounted on the side or bottom of the duct, as
the application requires.
SPECIFICATIONS
IMPORTANT
The specifications given in this publication do not
include normal manufacturing tolerances.
Therefore, this unit may not exactly match the
listed specifications. Also, this product is tested
and calibrated under closely controlled conditions,
and some minor differences in performance can
be expected if those conditions are changed.
Available Damper Sizes: Even sizes from 6 in. x 6 in. up to
36 in. x 36 in.
Damper Dimensions: All ZD dampers are actually sized
5/32 in. smaller than the listed size to ensure correct fit.
Motor Electrical Rating: 24 Vac, 60 Hz, 0.32 A.
Motor Electrical Connection: 4 in. leadwire.
Motor Nominal Angular Rotation: 90°.
Motor Torque: Minimum 71 in.-oz. (500 milli-newton
meters) output torque available when motor is
energized and device is at the spring return initial start
position.
Nominal Motor Timing at 77 °F (25 °C) Ambient:
Energized at rated load: 30 seconds.
De-energized (spring return): 10 seconds.
Motor Ambient Temperature Rating:
40 to 140 °F (5 to 60 °C).
Motor Finish: Zinc-plated steel, anodized aluminum.
Motor Shaft Rotation Direction: Clockwise, when
energized and viewed from the base or shaft end.
Motor Mounting Means: Direct connection to damper
shaft.
Motor Mounting Position: Multi-poise.
Motor Dimensions: See Fig. 5.
NOTE: The motor specifications on pages 5-8 are for the
original M847D1004 or M847D1012 actuators
rather than the current M847D-ZONE actuators.
ZD Side Mount
ZD Bottom Mount