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CHECKOUT
To check out the EARD:
1. With 24 Vac applied to the motor leads, observe the
motor powering the damper to the open 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-closed 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.
ZD Damper WIRING
CAUTION
Personal Electrical Shock Hazard.
Can cause electrical shock or equipment damage.
Disconnect power before beginning installation.
The ZD has a 24 Vac, 50/60 cycle, .32A motor. The 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
ZD is a spring return damper that requires 24V to the two
motor leads to power the damper closed. When power is
removed from the motor, the damper springs back to its
normally-open position. When used with Honeywell
Networked Zoning, use closed and com terminals.
TRUEZONE ARD, EARD, AND ZD SERIES DAMPERS
CLOSED M6
OPEN M4
COM M1
NOTE:
WHEN INSTALLING ON OLDER MASTERTROL
BOARDS SUCH AS THE MARK V, JUMPER
M2-M5 ON THE PANEL.
Fig. 7. Power closed spring return open 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. 7 for typical motor wiring hookup.
CHECKOUT
To check out the ZD:
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.
7
TM
M14851A
33-00040—01
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