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Preparation
Before installing the ML7284 on the damper shaft, determine
the opening direction of the damper shaft (see Fig. 2) to
correctly connect the wiring.
Installation
Installing Actuator and Mounting Bracket
(Single Point Mounting)
Place the ML7284 Non-Spring Return Direct Coupled
Damper Actuator over the damper shaft.
Position the actuator for best access to the actuator
damper shaft locking screw.
Install the mounting bracket (see Fig. 2) and adjust it so
the tab is midway in the actuator slot. Mark the screw
holes for installing the mounting bracket on the damper
housing.
Remove the mounting bracket and actuator.
Drill or center punch the starting holes for the mounting
bracket screws (or use no. 10 self-tapping sheet metal
screws, not provided).
Place the actuator and mounting bracket back into
position over the damper shaft and install the mounting
bracket screws.
Move damper shaft either fully cw
Fully depress and hold disengage button while moving
actuator hub either fully cw
match damper shaft. Release disengage button.
ML7284 NON-SPRING RETURN DIRECT COUPLED DAMPER ACTUATOR
or ccw
.
or fully ccw
to
6 0
3 0
9 0
6 0
3 0
0
DISENGAGE
BUTTON
Fig. 3. Mounting hub to back of actuator.
5
Tighten the two 8 mm by 12 mm long set screws firmly
against the damper shaft (80-100 lb-in.).
ACTUATOR
SLOT
Fig. 2. Installing mounting bracket on ML7284
Non-Spring Return Direct Coupled Damper Actuator.
NOTE: Install mounting bracket so mounting bracket tab
is centered in actuator slot.
RETAINING
RING
DETENT
INSERT
POSITION
INDICATOR
INDICATOR
DETENTS
HUB
SLEEVE
HUB
INSERTS
M7620C
M7619B
63-2504—2
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