ARD SERIES
TRUEZONE ARD, EARD, AND ZD SERIES DAMPERS
M35186
4-1/16
(103)
4-41/64
(118)
3-61/64
(100)
4-31/32
(126)
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.
Motor Electrical Rating: 24 Vac, 60 Hz, 8VA.
Motor Electrical Connection: Push terminals. Solid (not
stranded) wire is recommend.
Motor Nominal Angular Rotation: 90°.
Motor Torque: Minimum 71 in.-oz. (500 millinewton 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).
Leakage: Less than 1% at 1/2 in. wc.
Pressure Drop: Maximum at full open: 0.0329 in. wc at 800
ft/min.
Maximum Static Pressure: 1 in. wc for all models except 0.3
in. wc for ARD20.
Motor Shaft Rotation Direction: Clockwise, when ener-
gized 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. 1.
Construction
ARD Dampers
Frame: Galvanized steel spiral duct, crimped on down-
stream side.
ARD Sizes: 5 in., 6 in., 7 in., 8 in., 9 in., 10 in., 12 in., 14 in.,
16 in., 18 in., and 20 in. diameters.
Gauge: ARD5-ARD12: 24 Gauge frame, and 22 Gauge
Blade: ARD14-ARD20: 22 Gauge frame, and 20 Gauge
Blade
EARD Dampers
Frame: Galvanized steel spiral duct
EARD Sizes: 5-, 6-. 7-, and 8-, inch diameter sizes
ZD Dampers
Frame: Solid construction using extruded aluminum frame
and blades
ZD Sizes: Even sizes from 6in. x 6in. 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.
Fig. 1. Motor and damper dimensions in in. (mm).
33-00040—01 2
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