INSTALLATION INSTRUCTIONS
33-00040-01
TrueZONE ARD, EARD, and ZD
Series Dampers
APPLICATION
ARD Series Damper
The ARD is a round damper with a 24 Vac, spring-Open return
damper motor used to control circulating air in heating,
cooling, and ventilating systems.
EARD Series Damper
The EARD is a round damper with a 24 Vac powered-open/
spring-closed motor. It is used for fresh air intake for
Ventilation or for combustion makeup air.
ZD Series Damper
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.
FEATURES
• Taping Flange and non-interfering set screw
• High Temperature outer plastic for hot environments
• Redesigned all Metal Drive Train Gears
• Front facing display with LED Indication light for Open
and Close.
• Adjustable damper position range stops
• Quiet operation.
ARD Features
• Adjustable close position range stops
• Shipped as power closed/spring return open damper.
• Available in 5 to 10” inch, 12, 14, 16, 18, and 20 inch
diameter sizes.
• Male (crimped) and female (uncrimped) ends to connect to
any rigid or flexible round duct.
• Rated to operate up to 1 in. wc
• Blade closes off tightly against gasket for minimal leakage.
• Fail-safe, normally open operation
• Simple, easy-to-wire, two-wire installation with a third wire
option M4 for LED open only light
EARD Features
• Adjustable open position range stops
• Shipped as power open/spring return closed damper.
• Blade closes off tightly against gasket for minimal leakage.
• Galvanized steel
• Rated to operate up to 1 in. wc
• Simple, easy-to-wire, two-wire installation
• Male (crimped) and female (uncrimped) ends to connect to
any rigid or flexible round duct.
ZD Features
• Adjustable closed position range stops
• Rated to operate up to 1 in. wc
• 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 light
• Fail-safe, normally open operation
• Ordering Instructions: Order ZD (dimension 1) x
(dimension 2). (Motor is always mounted on dimension 2
side.) For example, ZD10x8TZ is a 10 in. x 8 in. damper
with the motor on the 8 in. side; but a ZD8x10TZ is a 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).