Orion System VCM-X Modular E-BUS - Manual (Page 29)

VCM-X Modular E-BUS Controller Technical Guide
INSTALLATION & WIRING
29
Building Pressure Sensor
The OE258-01 Building Pressure Sensor must be wired as shown in the
illustration below for proper operation. There are 3 terminal connections
on the Building Pressure Sensor. Connect the power side of the 24 VAC
power source to the terminal labeled “+ EXC.” Connect the GND side
of the 24 VAC power source to the terminal labeled “- COM.” Connect
the remaining terminal labeled “OUT” to AI4 on the VCM-X Expansion
Module terminal block. See Figure 26 below for detailed wiring. The
AI4 Jumper on the expansion module must be set for 0-5VDC operation
for the Building Pressure Sensor to operate correctly.
Warning: It is very important to be certain that all wiring is
correct as shown in the wiring diagram below. Failure to observe the
correct polarity will result in damage to the HVAC Unit Controller,
Building Pressure Sensor, and the VCM-X Expansion Module.
Figure 26: OE258-01 — Building Pressure Sensor Wiring
Building Pressure Sensor Wiring