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.
Various UNT models were offered, and they were applied to a wide range of applications. To replace a UNT controller in an application where only a few of its inputs are being used, we recommend using the FX-PCG1611controller. To replace a UNT controller in an application where most or all of its inputs are being used, we recommend using the FX-PCG2611controller. If the FX-PCG controller does not have enough onboard I/O to meet the replacement application requirements, then add FX-PCX Expansion I/O Modules. Make note of any special application controllers such as for use in low or extended temperature applications. Contact your Johnson Controls representative or technical support group for recommendations.