When it comes to installing a heat pump, the water circuit is one of the most critical components for ensuring optimal performance and longevity. Whether you’re using the heat pump for domestic hot water, space heating, or cooling, understanding how to correctly install and maintain the water circuit can make all the difference in energy efficiency, safety, and the lifespan of your system.
Today, we’re showcasing the best practices for water piping and water circuit connection in Tongyi Heat Humps. Let’s take a closer look at some key aspects that technicians should keep in mind when installing the water circuit in heat pump systems.
1. Closed Water System: Why It Matters
Tongyi Heat Pumps are designed to work only in closed water systems, where the water circulates in a sealed environment. This is crucial to prevent the pipes from corroding due to exposure to air and contaminants. Open water systems are highly susceptible to corrosion, especially in the presence of oxygen, which can quickly degrade the quality and integrity of your pipes. Closed systems not only preserve the longevity of the components but also enhance the heat pump’s efficiency.
A closed system ensures that no external elements enter the water circuit, helping to maintain the cleanliness of the water and reduce the likelihood of damage to the heat exchanger and pumps.
2. Pressure Management for Long-Term Efficiency
Managing water pressure in the system is essential for smooth operation. While the maximum water pressure of the system can reach 3 bar, the optimal range is between 1 and 2 bar. This pressure range matches the pre-pressure of the expansion vessel, which is generally set to 1 bar at default. The expansion vessel itself holds 5 liters of water and is designed to absorb pressure changes within the system.
If the water pressure is outside the recommended range, it can lead to operational inefficiencies, including reduced heating or cooling capacity, which could ultimately cause damage to the heat exchanger or pumps. It’s essential to adjust the pre-pressure of the expansion vessel carefully, and this should only be done by a licensed installer using dry nitrogen to avoid system malfunction.
3. Installing Shut-off Valves for Easy Maintenance
Another important factor to consider when setting up the water circuit is the placement of shut-off valves at the water inlet and outlet of the heat pump. These valves allow for easy isolation of the indoor unit during maintenance or repair, ensuring the system can be drained or worked on without impacting other components.
In addition to shut-off valves, drain taps should be installed at the lowest points of the system. This will allow for complete drainage during maintenance, making the entire process easier and less prone to accidental flooding or leaks.
4. Air Venting and Automatic Air Purge
Air in the water circuit can be a significant issue for heat pumps. When air gets trapped, it can block water flow and affect the efficiency of the system. To counteract this, ensure that air vents are installed at the highest points in the system. These air vents should be easily accessible for future servicing, allowing for straightforward air purging when necessary.
Tongyi Heat Pumps come equipped with an automatic air purge, which helps release air trapped within the unit. However, it’s essential to check that this air purge is not overtightened, as this could prevent it from functioning correctly. A system with proper air venting ensures smooth operation and minimizes the risk of costly breakdowns.
Proper installation of the water circuit in your Tongyi heat pump system is essential for maintaining optimal performance and preventing unnecessary damage or wear. By adhering to these guidelines—such as using closed water systems, managing water pressure, and ensuring the correct materials are used—you can significantly enhance the longevity and efficiency of your heat pump. Always rely on licensed professionals for installation and maintenance, and your system will deliver high-performance heating and cooling for years to come.
