Installation Sheet

TRUEZONE ARD, EARD, AND ZD SERIES DAMPERS
7 33-00040—03
CHECKOUT
To check out the ARD or ZD:
1. With 24 Vac applied to M1 and M6, observe the
motor powering the damper to the closed position.
2. With power removed, observe the damper returning
to the normally-open position.
NOTE: To remove power, disconnect one wire from
the motor.
3. If the motor does not operate smoothly and without
hesitation throughout the complete opening and
closing stroke, examine the damper and the shaft for
free rotation within the duct.
To check out the EARD:
1. With 24 Vac applied to the motor, observe the
indicator window shows the damper opening.
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-closed position.
NOTE: To remove power, disconnect one wire from
the motor.
4. If the motor does not operate smoothly and without
hesitation throughout the complete opening and
closing stroke, examine the damper and the shaft for
free rotation within the duct.
Wiring ARD or ZD Damper
CAUTION
Personal Electrical Shock Hazard.
Can cause electrical shock or equipment damage.
Disconnect power before beginning installation.
The ARD and ZD has a 24 Vac, 50/60 cycle, .32A motor.
The ARD and ZD is wired to terminals M1 and M6 for
power closed/spring return open, with an option for M4
wire to power LED light only. The ARD and ZD is a spring
return damper that requires 24V to M1 and M6 to power
the damper closed. When power is removed from the
motor, the damper springs back to its normally-open
position.
Fig. 6. Power closed spring return open
ARD or ZD wiring.
Wiring Multiple Dampers
When the same zone controls two or more dampers, wire
the dampers in parallel to terminals M1 and M6 on the
zone control panel.
Wiring a Motor
See Fig. 6 for typical motor wiring hookup.
CLOSED M6
M37925
OPEN M4
COM M1
NOTE: WHEN INSTALLING ON OLDER MASTERTROL
BOARDS SUCH AS THE MARK V, JUMPER
M2-M5 ON THE PANEL.