Johnson Controls AS-UNT120-1 — Unitary Controller

Part number	AS-UNT120-1
Brand	Johnson Controls
Category	Controller
Description	Unitary Controller
Manufacturer	Johnson Controls
Product Type	Unitary Controller
Product Line	Metasys AS
Part Number	AS-UNT120-1
Weight	1.13 lbs (0.51 kg)
Sub-Category	Control/Interface Board
Analog Inputs	6
Binary Inputs	4
Zone Bus Communication	Included
N2 Bus Communication	Included
Power Supply	Included
Primary Control Strategies	Room/zone control
Economizer Changeover Strategies	Dry bulb Outside air enthalpy Differential outside/return air temperature Outside air and return air enthalpy comparison Binary input from external economizer Supervisory network command
Mixed Air Control Strategies	Proportional output to outdoor air/room air damper actuator Binary output to economizer actuator Zone bus output to OA/RA damper actuator
Heating Configuration	Modulated single coil Staged electric heat (3-stage maximum) Modulated common heating/cooling coil Reversing valve logic for heat pumps Incremental
Cooling Configuration	Modulated single coil Staged direct expansion (2-stage maximum) Modulated common heating/cooling coil Reversing valve logic for heat pumps Incremental
Fan Start/Stop	Continuous operation Cycled with call for heating/cooling

The Johnson Controls AS-UNT120-1 is a Unitary Controller with a heater designed for low-temperature applications. It operates on a system power of 24 VAC, 50/60 Hz at 40 VA. The power draw ranges from 10 VA (400 mA) for UNT with sensors/transmitters to 25 VA for UNT120/121 due to the heater. Its dimensions vary from 165 x 163 x 56 mm (6.5 x 6.4 x 2.2 in.) without enclosure to 173 x 185 x 119...

Compatibility data for this part number is being verified. Send an RFQ with your equipment model and serial — our suppliers confirm fitment before quoting.

Data compiled from 1 verified source. Last reviewed 2026-08-16.