- Combines proportional plus integral modulating control with on/off control for commercial HVAC temperature applications.
- Supports selectable internal sensing or a remote PT1000 sensor with adjustable control parameters.
- Provides heat/cool changeover, sequenced heating and cooling, emergency interlocking, and temperature-limit alarming.
T2798I-1000 is a Honeywell standalone LCD temperature controller designed for commercial HVAC and air-handling equipment.
Its selectable modulating output controls compatible valve or damper actuators, while the on/off output supports switching, staging, or temperature-limit functions.
Before installation or replacement, verify the applicable hardware series, compatibility, wiring, configuration, and installed-system requirements.
Availability, condition, price, and shipping time for T2798I-1000 are confirmed during quotation.
Honeywell T2798I-1000 Standalone LCD Temperature Controller Manuals, Product Family, Links
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Output 1 supports manual heating or cooling changeover for two-pipe AHU, zoning, and hydronic-heating applications.
- Heating and cooling sequence control uses an adjustable zero-energy band centered on the temperature setpoint.
- Output 2 can provide high- or low-temperature limitation using a separately configured limit setpoint.
- The main sensor is selectable between the internal sensor and a remote PT1000 sensor with a maximum 15 m cable run.
- The dry-contact input supports emergency interlocking and requires the documented terminal jumper when the interlock is unused.
- The analog output supports direct or reverse 2–10 VDC or 4–20 mA operation, accompanied by a 24 VAC on/off output.
- Mount the controller on a flat surface using a standard electrical box; internal sensing installations should be approximately 1.5 m above the floor.
- Select a location with representative temperature and good airflow, away from drafts, duct discharge, radiant heat, concealed pipes, and chimneys.
- Use the documented eight-terminal allocation and plug-in screw terminals suitable for conductors up to 1.5 mm².
- Commercial air-handling unit temperature control
- Hydronic heating temperature control
- Heat-exchanger temperature control