Input Wiring - Johnson Controls NXA-FCU-01 Installation Manual

INPUT WIRING

Inputs allow a user to connect thermistors and dry contacts to the FCU-01
controller. There are 6 inputs on the FCU-01 controller and the inputs must
be jumpered to allow for thermistors or dry contacts. The Inputs are shown in
Figure 6 below and must be wired as follows:
• UI1 must be wired to Discharge Air Temperature
• UI2 must be wired to Mixed Air Temperature
• UI3 must be wired to Space/Return Air Temperature
• UI4 must be wired to Outside Air/Supply Water Temperature
• UI5 must be wired to Fan Status
• UI6 must be wired to Emergency Shutdown
Figure 6. Inputs.
FCU Controller
I6 GND I5 I4 GND
UI4
OutsideAir/
Supply
Water Temp
UI5
Fan Status
UI6
Emergency
Shutdwon
I3 I2 GND I1 VOUT
UI1
Disharge Air
Temp
UI2
Mixed Air
Temp
UI3
Space/Return
Air Temp
Installation Guide
J2
13