Honeywell CVL4022ASVAV1 Engineering Manual page 10

DAMPER SHAFT
ROTATES
CLOCKWISE
TO OPEN
Fig. 4. Damper with 90 degree CW rotation to open.
Before Mounting Actuator onto
Damper Shaft (CVL4022AS-VAV1
only)
Tools required:
• Phillips #2 screwdriver - end-limit set screw adjustment
• 8 mm wrench - centering clamp
Before mounting the actuator onto the VAV box damper shaft,
determine the following:
1. Determine the damper shaft diameter. It must be between
3/8 in. to 1/2 in. (10 to 13 mm).
2. Determine the length of the damper shaft. If the length of
the VAV box damper shaft is less than 1-9/16 in. (40 mm), the
actuator cannot be used.
3. Determine the direction the damper shaft rotates to open
the damper (CW or CCW) (see Fig. 5). Typically, there is an
etched line on the end of the damper shaft that indicates the
position of the damper. In Fig. 4, the indicator shows the
damper open in a CW direction.
4. Determine the damper full opening angle (45, 60, or 90
degrees). In Fig. 4, the damper is open to its full open position
of 90 degrees.
31-00083—02
DAMPER
Fig. 5. Determining the rotation direction (CW or CCW) for
M23569A
Mounting Actuator onto Damper
Shaft (CVL4022AS-VAV1 only)
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 clockwise).
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 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 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:
10
TYPE A DAMPER
AIR
FLOW
CW TO OPEN, CCW TO CLOSE
TYPE B DAMPER
AIR
FLOW
CCW TO OPEN, CW TO CLOSE
damper opening.
M2067C