Wiring – Johnson Controls M9220-GGX-3 User Manual

Page 6

M9220-GGx-3 Proportional Electric Spring Return Actuators Installation Instructions

Rotate the damper blades to the desired position if
the power is lost. To ensure a tight seal, insert the
manual override crank and turn it in the direction
indicated by the arrow on the label five turns; the
position indicator should be near the 0° position on
the scale. Quickly rotate the manual override crank
a half turn in the opposite direction to temporarily
lock the actuator hub in place.

Evenly hand tighten each clamp nut onto the
U-bolt, keeping the actuator flat. Secure the U-bolt
to the damper shaft and tighten to a torque of 100
to 125 lb·in (11 to 14 N·m).

To release the spring, turn the manual override
crank in the direction indicated on the label; the
actuator spring returns to its starting position. If this
step is omitted, the spring releases automatically
when power is applied to the actuator.

Remove the manual override crank and store it in
an unused mounting hole.

10. Apply power long enough for the actuator to travel

a full stroke, and verify that the actuator rotates
freely throughout the range.

Note: If electric power is not available, complete
this verification by reinserting the manual override
crank and turning it in the direction indicated to
rotate the coupler to the fully open position.

Rotation Range Using Optional
M9220-603 Adjustable Stop Kit

The actuator is factory set for 90° rotation, and its
rotation range is limited in 5° increments to a minimum
of 30°. Stroke limiting stops are attached in the field to
the shaft coupler side of the actuator to reduce the
rotation range. Attaching a stroke limiting stop in the
furthest mounting position reduces the rotation range of
the actuator by 5°. Each progressive mounting position
reduces the rotation range an additional 5°.

Check that the damper blade is accessible or that
its position is permanently marked on the end of
the damper shaft as illustrated in Figure 7.

Determine the desired rotation range. If a 65 to
90° rotation range is desired, add one stroke
limiting stop. If a 35 to 60° rotation range is desired,
add two stroke limiting stops.

Note: If two stroke limiting stops are applied, use
the manual override crank to position and lock the
actuator in a mid-stroke position to gain access to
both stroke limiting stop mounting positions.

Mount the stroke limiting stops in the desired
position using the two M4 x 10 mm self-tapping
screws provided. Tighten the screws to a torque of
35 lb·in (4 N·m).

Manually reposition the coupler so that the coupler
set screw aligns with the nodule guide that
corresponds to the value determined in Step 2.

Example:

For a rotation range of 65°, mount one stroke
limiting stop in the minimum stroke position as
illustrated in Figure 8.

Wiring

The M9220-GGx-3 Proportional Electric Spring Return
Actuator provides reliable, integrated damper control.
An AC 24 V at 50/60 Hz or DC 24 V input signal
between the black and red wires, and a
DC 0(2) to 10 V input control signal, causes the output
hub to rotate from -5 to 90° (unless an external
mechanical limit is reached).

Once the actuator reaches the commanded position, it
holds that position until power is removed. If power is
removed, the actuator spring returns to its
-5° position (unless an external mechanical limit is
reached). A stall condition while driving between
-5 to 90° causes the output hub to stop motion and
hold its position until power is removed. Rotation is
mechanically limited to the -5 and 90° positions by
integral end-stops. Optional end-stops are available to
limit the output hub travel. An anti-rotation bracket
prevents rotational movement of the actuator body.

Figure 7: Damper Position Icons

pos

Figure 8: One Stroke Limiting Stop

Mounted in the Minimum Stroke Position for a

Rotation Range of 65°

-5

Sweep Angle
Indicated in 5
Increments

Shaft Position
Pointer

Adjustment Holes
(Qty Two Groups
of Eight)

Lock Screw
(Qty Two)

:ra

nge

Stroke Limiting
Stop (Qty Two)