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Honeywell MN6105VAV Installation Instructions Manual page 3

5 nm vav actuator
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Installing the New Actuator
1. Install new actuator by inserting the anti-rotation
end below the foam block in the bottom of the hous-
ing, then push the output end of the actuator into
the locking mechanism. It should distinctly snap
into place.
NOTE: The actuator must be flat against the bot-
tom of the enclosure. If not, check that the
slot of the actuator is below the plastic anti-
rotation feature in the bottom of the enclo-
sure.
2. Replace the wiring connector, with the cables point-
ing down and away from the circuit board.
3. Replace the cover that was previously set aside by
latching the tabs on the top of the housing, and
pushing down on the bottom of the cover until the
bottom tabs engage.
NOTE: The actuator declutch button may need to
be pushed down while rotating the cover
down to engage the bottom tabs.
4. Follow the steps in "Mounting Actuator Onto
Damper Shaft" below to re-install the actuator onto
the VAV box.
Mounting Actuator Onto Damper Shaft
Tools required:
— Phillips #2 screwdriver - end-limit set screw
adjustment
— 8 mm wrench - shaft adapter nuts
The unit is shipped with the actuator set to rotate open in
the clockwise (CW) direction to a full 95 degrees. The extra
5 degrees ensures a full opening range for a 90 degree
damper. The installation procedure varies depending on
the damper opening direction and angle:
1. If the damper rotates clockwise (CW) to open, and
the angle of the damper open-to-closed is 90
degrees:
a. Manually open the damper fully (rotate clock-
wise).
b. Using the declutch button, rotate the universal
shaft adapter fully clockwise.
c. Mount the actuator to the VAV damper box and
shaft.
d. Tighten the two bolts on the centering clamp
(8 mm wrench; 70.8–88.5 lb-in. [8–10 Nm]
torque). When the actuator closes, the damper
rotates CCW 90 degrees to fully close.
2. If the damper rotates clockwise (CW) to open, and
the angle of the damper open-to-closed is 45 or 60
degrees:
a. Manually open the damper fully (rotate clock-
wise).
b. The actuator is shipped with the mechanical
end-limits set at 95 degrees. Adjust the two
mechanical end-limit set screws to provide the
desired amount of rotation. Adjust the two set
screws closer together to reduce the rotation
travel.
c. Tighten the two mechanical end-limit screws
(Phillips #2 screwdriver; (26.5–31 lb-in. [3.0–3.5
Nm] torque).
d. Using the declutch button, rotate the universal
shaft adapter fully clockwise.
e. Mount the actuator to the VAV damper box and
shaft.
f.
Tighten the two bolts on the centering clamp
(8 mm wrench; 70.8–88.5 lb-in. [8–10 Nm]
torque).
g. When the actuator closes, the damper rotates
CCW either 45 or 60 degrees to fully close.
3. If the damper rotates counterclockwise (CCW) to open,
and the angle of the damper open-to-closed is
90 degrees:
a. Manually open the damper fully (rotate counter-
clockwise).
b. Using the declutch button, rotate the universal
shaft adapter fully counterclockwise.
c. Mount the actuator to the damper box and shaft.
d. Tighten the two bolts on the centering clamp (8
mm wrench; 70.8–88.5 lb-in. [8–10 Nm] torque).
When the actuator closes, the damper rotates
CW 90 degrees to fully close.
4. If the damper rotates counterclockwise to open, and
the angle of the damper open-to-closed is 45 or
60 degrees:
a. Manually open the damper fully (rotate counter-
clockwise).
b. The actuator is shipped with the mechanical
end-limits set at 95 degrees. Adjust the two
mechanical end-limit set screws to provide the
desired amount of rotation. Adjust the two set
screws closer together to reduce the rotation
travel.
c. Tighten the two mechanical end-limit screws
(Phillips #2 screwdriver; 26.5–31 lb-in. [3.0–3.5
Nm] torque).
d. Using the declutch button, rotate the universal
shaft adapter fully counter-clockwise.
e. Mount the actuator to the VAV damper box and
shaft.
f.
Tighten the two bolts on the centering clamp
(8 mm wrench; 70.8–88.5 lb-in. [8–10 Nm]
torque).
g. When the actuator closes, the damper rotates
CW either 45 or 60 degrees to fully close.
IMPORTANT
Special precautions must be taken for dampers
that open in a CCW direction. The actuator is
shipped with its rotation direction set to CW to
Open, which applies to the damper direction in
steps 1 and 2 above. If the damper shaft rotates in
the CCW direction to open, the controller software
must be programmed to change the rotation to
"Reverse to Open," which applies to the damper
direction in steps 3 and 4 above.
3
MN6105VAV 5 NM VAV ACTUATOR
31-00150EF—03

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