Terminal Unit

Control (TUC)

TUC Sequence of Operation

Cooling and Heating Operation

Setpoint Control

·Occupied

·Unoccupied

·Tracer® with supply fan control

Occupied

In the occupied mode, the factory configures the TUC for continuous occupied fan cycle. With the fan control set to auto, the fan operates at the required speed to meet the cooling or heating capacity.

However, the fan will run at one set speed continuously if set in the high, medium, or low position.

Unoccupied

In the unoccupied mode, the TUC cycles the fan between off and high speed to satisfy the unoccupied setpoint. However, if the occupied preheat damper position is closed and the room setpoint is 3° F above (cool down) or 3° F below (warm-up) setpoint, the fan runs at high speed when exiting the unoccupied mode to occupied mode. Also, if the occupied preheat damper position is configured as closed, the fan will run in high speed any time the room temperature falls 3° F or below room setpoint in occupied heating mode.

Tracer® with supply fan control

If the unit is communicating with Tracer® and the supply fan control programming point is configured for Tracer® (the factory configures as local), then Tracer® will control the fan regardless of the fan mode switch position.

All TUC lockouts (latching diagnostics) are manually reset whenever the fan mode switch is set to the off position or when power is restored to the unit. The last diagnostic to occur is retained until the unit power is disconnected. Refer to Trane publication, EMTX-IOP-1TUC Installation Operation and Programming Guide, for specific instructions regarding the procedure for running the TUC.

Adjust the cooling setpoint by using either the setpoint adjustment knob, resetting the TUC default values, or Tracer® downloaded values. The factory configures the occupied heat or cool setpoint source for local mode. The local mode allows the local setpoint knob to deter- mine the cooling setpoint If using Tracer® to define the heat or cool setpoint source, the TUC uses the Tracer® setpoints. If Tracer® is not communicating, the TUC will attempt to obtain the heating and cooling setpoint from a local source. If there is no input from a local source, the TUC will resort to its default values.

The TUC limits the parameters of the cooling setpoint input (adjust- able from either the setpoint knob or Tracer® ) to prevent excessively

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Trane LO manual TUC Sequence of Operation, Cooling and Heating Operation, Setpoint Control, Tracer with supply fan control

LO specifications

Trane LO is a cutting-edge solution in the HVAC sector, designed with advanced engineering and smart technologies to meet diverse climate control needs. Renowned for its reliability and efficiency, Trane LO offers a wide array of features that set it apart in the market.

One of the core characteristics of Trane LO is its energy efficiency. Equipped with variable speed compressors, the system can adjust its output according to the cooling or heating demand, ensuring optimal energy use. This feature not only reduces energy consumption but also lowers utility bills for users. Additionally, Trane LO units often come with a SEER (Seasonal Energy Efficiency Ratio) rating that ensures top performance during hotter months.

Incorporating state-of-the-art technology, Trane LO features Smart Technology integration. Through IoT (Internet of Things) capabilities, users can monitor and control their HVAC systems remotely via smartphones or smart home devices. This feature promotes convenience and ensures that energy use can be optimized from anywhere, giving users greater control over their indoor climate.

Another standout technology in Trane LO is its use of environmentally friendly refrigerants. The system is designed to utilize low-GWP (Global Warming Potential) refrigerants, making it compliant with modern environmental standards and contributing to a greener planet.

The Trane LO also emphasizes durability. Constructed with high-quality materials, including weather-resistant finishes, these units are built to withstand various environmental conditions, ensuring they maintain peak performance over the years.

Noise reduction is another critical aspect of the Trane LO line. With features such as sound blankets and vibration dampening technology, the units operate quietly, ensuring that the comfort of users is not compromised by disruptive noise levels.

Maintenance is simplified with the Trane LO, as several units are engineered for easy access to essential components, promoting hassle-free servicing. This is vital for prolonging the lifespan of the system and reducing maintenance costs.

In summary, Trane LO represents a fusion of energy efficiency, advanced technology, environmental responsibility, durability, and user-friendly features. Whether for residential or commercial applications, Trane LO systems stand as a reliable choice for effective climate control.