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VCCX2 Controller Technical Guide
Supply Fan VFD Signal or Bypass
Damper Actuator
The Supply Fan VFD signal is a user-adjustable signal with a
range of 0-10 VDC from AO1 on the VCCX2 Controller. This
signal output can be connected to the Supply Fan Variable
Frequency Drive to modulate the supply fan speed or in a VVT
Zoning application to a bypass damper.
See Figure 20, this page for detailed wiring.
CAUTION: Variable Frequency Drive units can cause
large transient noise spikes which can cause
interference to be propagated on other
electronic equipment. Use shielded wire
wherever possible and route all sensor and
controller wiring away from the Variable
Frequency Drive and the HVAC Unit electrical
wiring.
Figure 20: Supply Fan VFD Wiring
WIRING
Supply Fan VFD or Bypass Damper Actuator
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