Product Overview

68-0247—03 4
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. 2 for typical motor wiring hookup.
a. For 2 wire usage, wire M1 and M6 (Fig. 2).
b. For 3 wire usage, break the plastic tab to access
M4. See Fig. 3.
Changing a Motor
NOTE: All ZD-series dampers (legacy and current
models) can be used with the M847D-ZONE
actuator.
1. Disconnect the motor wiring.
2. Loosen the large Allen set screw located between the
faceplate and the motor coupling.
3. Remove the motor.
4. Ensure damper blades are 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 that the
standoff on the motor is positioned in the grommet
on the faceplate and that the set screw is aligned
with the motor shaft hole.
6. Tighten the set screw.
Setting a Range Stop
Set the range stop to the desired position.
Position 0 means fully closed.
NOTE: Range stops prevent full closure.
Approximate ZD Bleed Rate.
Fig. 4. TrueZONE Actuator range stop positions.
CHECKOUT
To check out the ZD:
1. With 24 Vac applied to the M1 and M6 terminals,
observe the motor powering the damper to the
closed position.
2. When energized, verify that the indicator in the
window rotates from Open to Closed and the LED for
Closed is lit.
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
hesitation throughout the complete opening and
closing stroke, examine the damper and the shaft for
free rotation within the duct.
5. If the opening and closing is not achieved, check
that the range-stop setting is correct.
Position Bleed Rate
0Closed
116%
230%
350%
M35187A
RANGE STOP
LOCATIONS