ABB CBV-2U4-3T User Manual page 10

Accommodating Dampers with Less than a 90° Actuator Stroke
Use the following procedure to set the actuator to accommodate dampers with less than a 90° stroke.
1. If the angle of the damper opening is either 45° or 60°, close the actuator by pushing in the Damper
Manual Override button on the front of the actuator.
2. While holding the Damper Manual Override button in, rotate the hub until the damper is fully open.
3. Loosen the range stop screw and set range stop to appropriate position.
4. Tighten range stop screw so that the actuator will no longer be able to rotate beyond the point where
range stop was set.
Wiring the CBV-2U4-3T(-N)
Once the box type has been determined, users can then wire the
sensors, and the elements of the VAV box (fan, heating coils, valve, and so forth). This section will go over
the various wiring considerations for the CBV-2U4-3T(-N).
Connecting Power to the CBV-2U4-3T(-N)
The CBV-2U4-3T(-N)
Triac loads) maximum supplied from an externally mounted power transformer. One conductor of the 24-volt
side of transformer must be grounded to avoid damage to the controller. This conductor will be wired to the
CMN (common) of the controller. The wiring diagram is shown below:
CBV-2U4-3T
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requires 24 V AC +/- 15% at 55 VA (up to 12 VA internal power plus up to 43 VA supplied to
Installation Overview
CBV-2U4-3T(-N) |
CBV-2U4-3T(-N)
CBV-2U4-3T-N
for the network, the room
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