Terminal Unit

Control (TUC)

Table 46—Continued. Valves Closed

Probable Cause

Explanation

Unit Configuration

The TUC cannot control any valve outputs if the unit is configured

 

for no valves. Also, if the valve type is incorrectly configured (on/off,

 

modulating analog, or 3-wire floating point), the valve(s) may not

 

operate properly.

No Power to the TUC Wiring

The TUC requires a 24 VAC power for the unit to operate properly.

The wiring between the controller outputs and the valve(s) must be present and correct for normal valve operation. Refer to the typical unit wiring diagrams on pages 105-106.

Table 47. Valves Open

Probable Cause

Explanation

Normal Operation

The valves open and close to meet unit capacity requirements.

Override Present

The valves may be overridden to the open position by either the

 

Tracer® system or by Everyware™ software. Whenever any

 

override is active, the TUC drives the valves closed unless they are

 

concurrently overridden open.

Autocycle Test

The controller includes an autocycle test sequence that verifies

 

analog and binary output operation and associated output wiring.

 

However, based on the current stage in the test sequence, the

 

valve(s) may be open. Refer to the “Autocycle Test” section on

 

page 71.

Unit Configuration

The TUC cannot control any valve outputs if the unit is configured

 

for no valves. Also, if the valve type is incorrectly configured (on/off,

 

modulating analog, or 3-wire floating point), the valve(s) may not

 

operate properly.

Freeze Avoidance

When freeze avoidance is enabled (active only during stop modes)

 

the TUC controls the valve(s) open whenever the fresh air tempera-

 

ture is less than the freeze avoidance setpoint (configurable). If the

 

freeze avoidance setpoint is zero, this feature is disabled.

Wiring

The wiring between the controller outputs and the valve(s) must be

 

present and correct for normal valve operation. Refer to the typical

 

unit wiring diagrams on pages 105-106.

UNT-IOM-6

111

Page 110 Page 112
Page 111
Image 111
Trane LO manual Valves Open Probable Cause Explanation
Page 110 Page 112

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.
Top Page Image Contents