period five

Accessories

notes

When the compressor is shut off, the evaporator contains a large quantity of liquid refrigerant. This can present a problem if some of the refrigerant drains into the suction line and slugs the compressor when it starts up again. To prevent this from occurring, many systems pump the refrigerant out of the evaporator and suction line before shutting the compressor off. This is called a pump-down cycle. Instead of shutting the compressor off right away, the solenoid valve is closed to stop the flow of liquid refrigerant into the evaporator, and the compressor is allowed to run for a short period of time. The compressor pumps the refrigerant from the low-pressure side of the system (evaporator and suction line) to the high-pressure side of the system (discharge line, condenser, and liquid line.)

As the low-pressure side of the system is pumped free of refrigerant, the pressure in that part of the system drops. To end the pump-down cycle, a pressure sensor is used to shut the compressor off when this pressure reaches a predetermined set point. Prior to starting the compressor again, the solenoid valve is opened, allowing the pressure on the low-pressure side of the system to increase again.

The solenoid valve should be installed as close to the expansion valve as possible. This will minimize the pump-down time and allow the liquid line to be used for storing refrigerant when the system is off.

Liquid-Line Filter Drier

liquid line

 

liquid-line

expansion

filter drier

valve

 

solenoid

 

valve

 

evaporator

Figure 53

Liquid-Line Filter Drier

The next accessory to be discussed, the liquid-line filter drier, is installed upstream of the solenoid valve and the expansion valve. It prevents moisture (water) and foreign matter, introduced during the installation process, from entering the expansion valve and the solenoid valve. Realize, however, that there is no substitute for cleanliness during system installation.

Moisture and foreign matter can cause problems in any refrigeration system. When water is mixed with refrigerant and oil, and heat is added by the compressor, acids are formed that can damage the valves or compressor. Additionally, certain foreign materials such as copper and brass particles can

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TRG-TRC005-EN

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Trane trg-trc005-en manual Liquid-Line Filter Drier
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trg-trc005-en specifications

The Trane TRG-TRC005-EN is a sophisticated and versatile HVAC control system designed for modern commercial buildings. As part of Trane's innovative lineup, this device offers advanced functionalities to enhance energy efficiency, comfort, and operational ease. The TRG-TRC005-EN is equipped with cutting-edge technologies that make it an essential tool for facility managers and HVAC professionals.

One of the main features of the TRG-TRC005-EN is its comprehensive control capabilities. This system allows for precise monitoring and management of heating, ventilation, and air conditioning systems, ensuring optimal indoor air quality and thermal comfort. With its intuitive interface, users can easily navigate through various settings, enabling them to customize the environment per their specific needs.

The TRG-TRC005-EN integrates seamlessly with Trane’s building management systems, offering enhanced connectivity for efficient control. This connectivity allows for real-time data analytics, ensuring users can make informed decisions based on the system’s performance. Furthermore, the device supports both wired and wireless communication protocols, enhancing its flexibility for different building setups.

Energy efficiency is a hallmark of the TRG-TRC005-EN. It features advanced algorithms that actively optimize energy usage, resulting in reduced operational costs. The system can assess external weather conditions and adjust HVAC settings accordingly, promoting energy conservation without compromising comfort.

Additionally, the TRG-TRC005-EN includes built-in diagnostics to monitor system performance continuously. This feature helps in early detection of potential issues, allowing for timely maintenance and minimizing downtime. The diagnostic capabilities extend to monitoring energy consumption, providing valuable insights for energy management strategies.

Another significant characteristic of the TRG-TRC005-EN is its user-centered design. The system offers customizable user roles, allowing different levels of access depending on the user’s needs. This aspect not only streamlines operation but also enhances security within the facility.

In summary, the Trane TRG-TRC005-EN is a powerful HVAC control solution that combines advanced technologies with user-friendly features. Its ability to optimize energy efficiency, enhance comfort, and provide real-time monitoring makes it an invaluable asset for managing modern commercial buildings efficiently. With the TRG-TRC005-EN, users can be assured of a reliable, effective, and intelligent system that meets the demands of today’s interconnected world.
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