Honeywell T6373A1108 Temperature Controller for FCU Systems

Honeywell T6373A1108 is a mechanical temperature controller for 2-pipe FCU systems, featuring 3-speed fan control, high reliability, and stable HVAC operation.

Overview of Honeywell T6373A1108 Temperature Controller

Honeywell T6373A1108 is a wall-mounted mechanical room thermostat designed specifically for Fan Coil Unit (FCU) applications in HVAC systems. As part of the Honeywell T6373 series, this controller is well known for its robust mechanical design, operational stability, and long service life, making it suitable for commercial and light industrial buildings.

The device is intended for 2-pipe FCU systems, allowing room temperature control through a rotary setpoint knob and a manual fan speed selector. With its non-digital structure, Honeywell T6373A1108 is ideal for projects that prioritize reliability, ease of maintenance, and cost-effective operation.

The product is imported and officially distributed by DLK – DLK TRADING SERVICE COMPANY LIMITED, ensuring genuine Honeywell origin, full documentation, and technical support for HVAC projects in Vietnam.

Operating Principle of Honeywell T6373A1108

Honeywell T6373A1108 operates on a mechanical on/off control principle using an internal temperature sensing element. When the ambient temperature deviates from the setpoint, the mechanical diaphragm mechanism actuates the internal switch, controlling the FCU fan and water valve accordingly.

The thermostat is equipped with an SPDT switch contact rated at 4(2) A at 220 VAC, suitable for direct control of fan motors, valves, or control relays. Users can manually select three fan speeds and switch between heating and cooling modes via a slide switch.

This mechanical operating principle eliminates the need for software configuration and ensures stable operation in environments where simplicity and durability are required.

Practical Applications Across Industries

Commercial buildings and office spaces

In office buildings and commercial complexes, FCU systems are commonly used for zone-based climate control. Honeywell T6373A1108 for FCU applications enables independent room temperature control, improving occupant comfort while maintaining system simplicity.

Hotels and hospitality facilities

Hotel rooms require stable temperature control with minimal operational issues. The mechanical structure of Honeywell T6373A1108 reduces failure risks, supports easy replacement, and ensures consistent comfort for guests throughout long-term operation.

Manufacturing plants and light industrial facilities

In production areas where precise temperature accuracy is not critical but stability is essential, Honeywell T6373A1108 provides reliable room temperature regulation, supporting both personnel comfort and equipment operation.

Hospitals and healthcare buildings

For waiting areas, administrative rooms, and general hospital spaces, mechanical thermostats offer long-term reliability and resistance to electrical noise, making Honeywell T6373A1108 a practical solution for FCU-based HVAC systems.

Key Benefits of Using Honeywell T6373A1108

Choosing Honeywell T6373A1108 provides several technical and operational advantages.
Its mechanical design ensures high reliability and long lifespan, especially in continuous operation environments. Installation and commissioning are straightforward, requiring no programming or digital configuration. The three-speed fan control allows flexible airflow adjustment based on actual room demand. Overall, the device delivers dependable temperature control without unnecessary complexity.

Key Technical Specifications Summary

How to Select the Right Model for Your Application

Honeywell T6373A1108 is recommended for HVAC systems using 2-pipe FCUs where basic room temperature control is required without integration into BMS or digital networks. For projects requiring higher accuracy, automatic changeover, or analog/digital communication, electronic Honeywell thermostats should be considered.

Selecting the correct thermostat model helps reduce installation costs, simplify maintenance, and ensure stable system performance over the lifecycle of the HVAC installation.

Why Purchase Honeywell T6373A1108 from DLK

DLK – DLK TRADING SERVICE COMPANY LIMITED is an official distributor of Honeywell products, specializing in HVAC and control equipment. Purchasing Honeywell T6373A1108 temperature controller from DLK guarantees genuine products, full CO/CQ documentation, and professional technical support.

DLK also provides consultation services to help engineers and contractors select the most suitable thermostat for each FCU application. Using Honeywell T6373A1108 for fan coil systems through an authorized distributor ensures long-term reliability, compliance, and project efficiency.