Operation

Conventional thermostat signals represent direct calls for unit functions. In their simplest applications, thermostat contacts directly control contactors or other load switching devices. This function provides inputs for the thermostat signals and processing to enhance reliability and performance. Compressor protection and reliability enhancement functions (HPC, LPC, Minimum On/Off timers, etc.). All operate the same whether applied with zone sensors or a conventional thermostat.

Logic is also provided to cause appropriate unit functions when inappropriate thermostat signals are provided. Simultaneous calls for heating and cooling will be ignored, and the fan will be turned on with a call for heating or cooling even if the fan request is not detected.

If the thermostat is immediately changed from a heating to a cooling call, or vice versa, there will be a five minute delay before the new call will initiate.

Thermostat signals are as follows:

R 24VAC power to thermostat

Y1 Call for compressor 1 or first stage cooling

Y2 Call for compressor 2 or 2nd stage cooling

G Call for supply fan

W1 Call for heat 1

W2 Call for heat 2

Heat pump only:

X2 Call for emergency heat

O Switchover valve On = cooling, Off = heating

T Bias for heat anticipation for those mechanical thermostats that use this function

Table 44

Conventional thermostat Gas / Electric, Electric Heat

Input / connection

Function when energized

 

 

G (fan)

Fan runs continuously except during unoccupied mode (see next page)

 

 

 

Y1

(compressor 1 or economizer)

Compressor #1 runs or economizer operates

 

 

 

Y2

(compressor 2 or compressor 1 while economizing)

Compressor #2 also runs, or #1 compressor runs while economizing

 

 

W1 (gas / electric heat first stage)

1st stage heat

 

 

W2 (gas / electric heat 2nd stage)

2nd stage heat (if available)

 

 

 

Table 45

 

 

Conventional thermostat Heat pump

 

 

Input / connection

Function when energized

 

 

Cooling mode

 

 

 

G (fan)

Fan runs continuously except during unoccupied mode (see next page)

 

 

O (reversing valve during cooling)

Reversing valve in cool mode

 

 

 

Y1

+ O (first cooling stage)

Compressor #1 runs or economizer operates

 

 

 

Y1

+ Y2 + O (2nd cooling stage)

Compressor #2 also runs, or #1 compressor runs while economizing

 

 

Heating mode

 

 

 

G (fan)

Fan runs continuously except during unoccupied mode (see next page)

 

 

 

Y1

(both compressors 1st heating stage)

Both compressors run

 

 

 

Y2

(during heating nothing happens)

No change

 

 

W2 (electric heat 2nd stage)

2nd stage (electric) heat

 

 

X2 (electric heat only)

Electric heat only - no compressors

 

 

 

T (provides heat anticipation signal for those mechanical thermostats that use this feature.

If the thermostat used does not have a "T" terminal, disregard this terminal.)

RT-SVX20A-E4

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Trane TSD, TSH 060 manual Thermostat signals are as follows, Heat pump only, Conventional thermostat Heat pump, Heating mode

TSD, TSH 060 specifications

The Trane TSH 060 and TSD series represent cutting-edge advancements in commercial HVAC systems, designed for efficient performance and enhanced reliability. These units are engineered for a wide range of applications, making them a popular choice for various industrial and commercial settings.

One of the standout features of the Trane TSH 060 is its energy efficiency. Equipped with advanced variable-speed scroll compressors, this series can modulate its output to match the specific cooling or heating demands of a building. This not only ensures optimal comfort but also significantly reduces energy consumption and operational costs. The integrated economizer enhances outdoor air usage, providing free cooling whenever outside conditions are favorable.

The TSD series complements the TSH models with its impressive flexibility and modular design. These units can be configured to accommodate diverse load requirements, ensuring that businesses can scale their HVAC solutions as their needs evolve. The TSD also incorporates Trane's proprietary Trane Tracerâ„¢ SC+ building management system, which allows for advanced monitoring and control capabilities. This system provides real-time data analysis and helps facilitate proactive maintenance, thereby minimizing downtime and maintenance costs.

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In summary, the Trane TSH 060 and TSD series offer a combination of energy efficiency, advanced technology, durability, and sustainability. Their modular design and compatibility with innovative building management systems make them ideal for businesses looking to optimize their HVAC systems while maintaining a commitment to environmental responsibility. With these features, Trane continues to set the standard in commercial HVAC solutions.