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EXCEL 10 W7751H SMART VAV ACTUATOR
3 95-7553—04
Fig. 3. Cover removal and mounting tab/terminal block access.
Fig. 4. Mounting W7751H to VAV box damper housing
when actuator is not parallel to VAV box damper housing.
Before mounting the W7751H onto the VAV box damper shaft,
determine the following:
1. The damper shaft diameter, 3/8 to 1/2 in. (10 to 13 mm).
2. If the length of the VAV box damper shaft is less than
1-3/8 in. (35 mm), use the Short Shaft Adapter Kit (not
included), part no. 4074EVK.
3. The direction the damper shaft rotates to open the
damper (CW or CCW), see Fig. 5.
4. The damper opening angle (45, 60, or 90 degrees).
Fig. 5. Determining rotation direction (CW or CCW)
for damper opening.
If damper shaft diameter is 3/8 inch (10 mm) round or square,
use part 201391 Shaft Adapter (shipped with the W7751H
Smart VAV Actuator). Ensure it is placed opposite set screws.
See Fig. 6. The adapter centers a 3/8 in. (10 mm) shaft in the
hub. Failure to use the adapter on a 3/8 in. (10 mm) shaft
causes the mounting tab to loosen. A 1/2 in. (13 mm) shaft
does not require the use of the adapter.
M10000
CIRCUIT BOARD
TERMINAL BLOCKS
MOUNTING TAB
PULL TOP OF
COVER OUT,
THEN DOWN,
FOR REMOVAL
CCW
CCW
CW
CW
60
45
45
60
CCW
CCW
CW
CW
60
45
45
60
M20884
1MM
(1/32 IN.)
1MM (1/32 IN.)
A
IR
FLOW
A
IR
FLOW
CW TO OPEN, CCW TO CLOSE
CCW TO OPEN, CW TO CLOSE
M2067B
TYPE A DAMPER
TYPE B DAMPER