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TRUEZONE ARD, EARD, AND ZD SERIES DAMPERS
WIRING
CAUTION
Personal Electrical Shock Hazard. Can cause
electrical shock or equipment damage.
Disconnect power before beginning installation.
The damper motor has a 24 Vac, 50/60 cycle, 8 VA rating. The
spring-return ARD and ZD damper requires 24 Vac to the two
motor leads to power the damper closed. The damper then
returns to its normal open position once power is removed.
EARD damper requires 24 Vac to the two motor leads to
power the damper open. The damper then returns to its
normal closed position once power is removed.
NOTE: Multiple dampers can be wired in parallel.
Wiring a Motor
See Fig. 3 and 7 for motor wiring hookups for ARD and ZD
Dampers
Changing Motor on ARD, EARD and
ZD Dampers
1. Disconnect the motor wiring.
2. Loosen the socket head cap set screw located between
the faceplate and the motor coupling.
3. Remove the motor.
4. Ensure damper blade is in the open position with the set
screw pointing toward the open position on the label.
5. Attach new motor to the coupling; be sure the standoff
on motor is positioned in the grommet on the faceplate
and the set screw is aligned with the motor shaft hole.
6. Tighten the set screw.
33-00040—01
Wiring a Single ARD (Power Closed)
to a Control Panel
M6
M4
M1
Fig. 3. ARD configured as power closed.
Checkout
CAUTION
Possible Equipment Damage
Do not manually open or close the damper as this can
damage the actuator.
To check out the ARD:
1. With 24 Vac applied to the motor leads, observe the
motor powering the damper to the closed position.
2. When energized, verify that the actuator connection
coupling rotates in a clockwise direction (as viewed from
the operator base end) and that the damper shaft turns
with the coupling.
3. With power removed, observe the damper returning to
the normally-open position.
NOTE: To remove power, disconnect one wire from the
motor.
4. If the motor does not operate smoothly and without hes-
itation throughout the complete opening and closing
stroke, examine the damper and the shaft for free rota-
tion within the duct.
4
CLOSED
OPEN
COMMON
ARD CONFIGURED
AS POWER CLOSED
M14843
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