Orion System VCC-X Controller - Manual (Page 33)

VCC-X Controller Technical Guide
VCC-X CONTROLLER WIRING
33
Static Pressure Transducer Wiring
Figure 19: OE271 Static Pressure Transducer Wiring Diagram
Static Pressure Transducer
The OE271 Static Pressure Transducer plugs directly into the VCC-X
Controller’s Static Pressure port. The Duct Static Pressure Sensor
reading is used to determine current Duct Static Pressure. This Static
Pressure reading is used to control the output signal supplied to the
Supply Fan VFD or Zoning Bypass Damper Actuator. If you have
confi gured the HVAC unit for Constant Volume operation, this Sensor
is optional. If it is installed on a Constant Volume unit, it will not
affect operation, but rather will be used as a status-only reading. See
Figure 19 below for detailed wiring.
CAUTION: It is strongly recommended that you use pneumatic
tubing instead of relocating the sensor. Extending the wires
could cause voltage drop problems.
Connect FRP Tubing To High Pressure
Port (Bottom Tube) and Route To Static
Pressure Pickup Probe Located In Unit
Discharge. Leave Port Marked “Lo” Open
To Atmosphere.
OE271
Static Pressure
Transducer
Splice If Required
(Not Recommended.
See Note)
CAUTION: It Is Strongly Recommended
That You Use Pneumatic Tubing Instead Of
Relocating The Sensor. Extending The Wires
Could Cause Voltage Drop Problems.
VCC-X Controller