The Trane THT2409 is a high-performance multi-voltage thermostat designed for 24V or 277V line voltage applications, commonly found in commercial fan coil units and PTAC systems. This horizontal mount thermostat features an automatic changeover (Auto C/O) function, allowing seamless switching between heating and cooling modes based on ambient temperature sensors. Engineered for precision control, it supports 4-speed fan operation, providing contractors with a reliable interface for managing airflow in high-occupancy environments. The Trane THT2409 24/277V replaces several legacy 7-wire configurations, ensuring backward compatibility with existing infrastructure while maintaining strict setpoint accuracy. Its rugged housing is built to withstand commercial wear, and the simplified wiring terminal layout reduces installation time on the job site. For technicians servicing multi-tenant buildings or hospitality HVAC loops, this digital fan coil thermostat offers the exact voltage versatility and fan speed control necessary for optimal thermal management.

Notes

Item is Non Cancelable / Non Returnable

• Universal Voltage Compatibility: Operates on both 24V and 277V circuits, eliminating the need for separate inventory for different line voltage requirements.
• Advanced Fan Speed Logic: Integrated 4-speed fan control allows for granular airflow adjustment to meet specific zone CFM requirements.
• Automatic Changeover: The Auto C/O feature senses thermal demand to switch modes without manual intervention, reducing service calls.
• Contractor-Grade Durability: Designed for heavy-duty commercial use with a responsive interface and clear display for maintenance diagnostics.

How do I wire the Trane THT2409 for 277V vs 24V applications?
The terminal block is rated for both voltages; however, technicians must verify the common and load wires match the specific transformer or line voltage output of the air handler or fan coil unit. Always refer to the wiring diagram on the interior casing to ensure the multi-voltage thermostat is phased correctly.

Can this thermostat control a 3-speed fan if the unit does not have a 4th speed?
Yes, the Trane THT2409 can be configured for fewer speeds by terminating the specific speed leads required by the blower motor. Ensure any unused speed taps are properly capped to prevent electrical shorts within the junction box.

Does the THT2409 support remote sensing?
This model typically utilizes an onboard thermistor for local temperature sensing. If your application requires a remote bulb or duct sensor, verify the specific sub-base configuration, as standard horizontal mount thermostats in this series are optimized for wall-mounted ambient detection.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.