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VCCX2 Controller Technical Guide
Building Pressure Control Output
The ASM01832 Building Pressure Control Output is a 0-10 VDC
or 2-10 VDC signal sent from the VCCX2 Controller. When
using the output for direct building Pressure control (output
signal rises on a rise in building pressure), the output signal
can be connected to either a Variable Frequency Drive (VFD)
controlling an exhaust fan or to a damper actuator controlling an
exhaust damper (both by others). When used in this manner, the
output signal must be congured for direct acting operation. See
Figure 23, this page for detailed wiring of the Building Pressure
Control Output Signal.
When using this output for Reverse Building Pressure Control
(output signal rises on a fall in building pressure), a damper
actuator controlling an OA damper or supply fan VFD would
be used.
When using the OA damper for Reverse Building Pressure
Control, the output signal must be congured for reverse acting
operation. A building pressure sensor connected to AI5 on the
VCCX2 Controller is used to sense and control the signal to the
building pressure output. The Building Static Pressure Sensor
must be connected in order for the building pressure output to
operate correctly.
CAUTION: VFD units can cause large transient noise spikes
that 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 VFD and
the HVAC unit electrical wiring.
Figure 23: Building Pressure Control Output Wiring Diagram
WIRING
Building Pressure Control Outputs
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