Replacing UNT Unitary Controllers - Metasys - LIT-12012005 - Field Device - N2 Controller - 13.0

Modernization Guide for N2 Controllers - Metasys

Product name
N2 Controller
Document type
User Guide
Document number
Revision date

UNT Unitary Controllers were used extensively for controlling packaged rooftop and heat pump units, small air handling units, unit ventilators, fan coils, and other terminal units serving a single zone or room. They were also frequently used as I/O devices for generic monitoring and control.

To replace a UNT controller in an application where you only use a few of its inputs, you can use the FEC1611 or CGM04060-0 controller. To replace a UNT controller in an application where most or all of its inputs are being used, you can use the FEC2611 or CGM09090-0 controller. If the FEC or CGM09090-0 controller does not have enough onboard I/O to meet the replacement application requirements, then add IOM or XPM series Expansion I/O Modules. Make note of any special application controllers, for example, for use in low or extended temperature applications. Contact your Johnson Controls representative or technical support group for best practices.