SPYDER MODEL 7 VAV CONTROLLER  INSTALLATION INSTRUCTIONS
31-00475-01   10
NOTE:
Mount the actuator flush with damper housing or 
add a spacer between the actuator mounting sur-
face and damper box housing.
Fig. 8  Mounting Controller to VAV Box Damper 
Housing when Actuator is not Parallel to VAV Box 
Damper Housing
2. Determine the damper ‘full opening angle’ (45, 60, 
or 90 degrees). In Fig. 7 on page 7, the damper is 
open to its fully open position of 90 degrees.
Mounting Actuator onto Damper 
Shaft
The Spyder Model 7 VAV controllers can be mounted in 
any orientation. Mount them in a position that allows 
access to the service button and clearance for wiring, 
servicing, and removing BACnet wiring.
Fig. 9  Mounting Actuator on Damper Shaft
NOTE:
The controller is not position sensitive and can be 
mounted sideways or upside down. Use the drill-
ing template provided in the box.
The Spyder Model 7 VAV controller's integral actu-
ator does not float inside the housing therefore it 
should be installed with a floating mount to allow 
for non-concentric travel, which can occur with 
damper shafts that are out-of-round and / or 
have asymmetrical damper shaft mounts.
If the actuator does not allow any wobble, it is 
likely to bind. To prevent this, when installing the 
Spyder Model 7 VAV controllers, install it over the 
damper shaft and then slide the anti-rotation 
bracket underneath and into the mounting slot 
but not at the very end of the slot. 
Screw the anti-rotation bracket using screws on 
the controller. 
Tools Required
• Phillips #2 screwdriver for end-limit set screw 
adjustment
• 8 mm wrench for centering clamp
The actuator mounts directly onto the VAV box damper 
shaft and has up to 44 in-lb. (5 Nm) torque, 90-degree 
stroke, and 108 second timing at 50 Hz and 90 second 
timing at 60 Hz.
The actuator is shipped with two mechanical end limit 
set screws to control the amount of rotation from 12 ° to 
95 °. These set screws must be securely fastened in 
place. To ensure tight closing of the damper, the shaft 
adapter has a total rotation stroke of 95 °.
Fig. 10  Setting the Mechanical End Limits
NOTE:
The actuator is shipped with the mechanical end-
limit set screws set to 95 ° of rotation.
Adjust the two set screws closer together to 
reduce the rotation travel. Each “hash mark” indi-
VAV BOX 
DAMPER
VAV BOX 
DAMPER
HOUSING
SHAFT
ADD WASHER OR SPACER (OBTAINED 
LOCALLY) BETWEEN VAV BOX DAMPER 
HOUSING AND THE ACTUATOR TAB TO 
KEEP THEM PARALLEL.