Terminal Unit

Control (TUC)

the outside air temperature falls to 10° F or more below the zone temperature. The TUC will control the damper to a position to produce optimal cooling during economizing. If power is interrupted or the TUC is turned off, the damper will spring back to the closed position.

If the occupied preheat damper position is configured as closed (the factory configures as open), the fresh air damper remains closed during the transition from unoccupied mode to occupied mode until the zone temperature is within 2° F of the heating setpoint (warm-up sequence), or cooling setpoint (cool-down sequence). During the warm-up sequence, the damper fully closes, the fan operates on high speed, and the heating valve drives fully open to until the zone temperature approaches the occupied heating setpoint. If the zone temperature falls 3° F or more below the heating setpoint during the occupied mode, the TUC reinitiates the warm-up sequence until the zone temperature is within 2° F of the heating setpoint.

If during the occupied heating mode, the TUC determines that no heating capacity is present and the zone temperature drops 3° F below the heating setpoint, the TUC closes the fresh air damper regardless of the occupied preheat damper position. The cool-down sequence has a maximum duration of one hour and cannot be reinitiated once the unit is in occupied mode.

All units ship from the factory with the damper in the closed position.

Note: The open position of the damper does not correspond to the amount of fresh air provided to the unit. It is the installer’s responsi- bility to ensure that the building’s minimum fresh air requirements are met while taking the necessary freeze conditon precautions to protect the unit.

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Trane LO manual Terminal Unit Control TUC
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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.
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