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Smart heat pump technology offers much more than remote access and energy monitoring. Tongyi’s R290 heat pump smart features also support larger heating systems, periods away from home, auxiliary heat sources and radiant floor installations.

In Part II, we explore four additional functions: cascade system control, holiday mode, Additional Heating Source support and the floor-drying programme.

Cascade Control for Larger Heating Systems

Properties with higher heating demands may require more than one heat pump. Tongyi’s R290 system supports the connection of up to eight units in a cascade configuration, managed through a single smart controller.

Cascade control allows multiple heat pumps to work together efficiently. The system can distribute the heating and domestic hot water load between the available units according to demand.

Different tasks can also be assigned to individual heat pumps. For example, one unit can provide space heating while another produces domestic hot water. This flexibility makes cascade systems suitable for larger homes and properties with more complex heating requirements.

Holiday Mode for Energy-Efficient Protection

Holiday mode helps reduce energy consumption when a property is unoccupied for an extended period.

When activated, the function lowers the heat pump’s output while maintaining the minimum level of heating required by the system settings. During colder periods, it can also help protect the system and property against freezing.

Homeowners can activate holiday mode through the smart controller. This provides greater convenience, lowers unnecessary energy use and offers peace of mind while they are away.

Additional Heating Source Support

In particularly cold conditions or applications with higher heating demands, an additional heat source may be required.

Tongyi’s R290 heat pump supports integration with auxiliary equipment such as:

  • An electric booster heater
  • A backup boiler
  • A solar thermal system
  • A water tank heating element

The heat pump can activate the configured auxiliary source when additional heating capacity is needed. This helps maintain stable indoor temperatures and a reliable domestic hot water supply during periods of high demand.

A three-way valve also enables the system to switch between space heating and domestic hot water production. This provides greater flexibility for different household requirements.

Floor-Drying Function for Radiant Heating Systems

For newly installed radiant floor heating systems, Tongyi’s R290 heat pump includes a controlled floor-drying programme.

The function gradually adjusts the water temperature according to a defined heating cycle. This helps the floor screed dry correctly before the heating system begins normal operation.

A controlled drying process supports system commissioning and reduces the risk of damage caused by heating a new floor structure too quickly. A qualified installer should configure and supervise the programme according to the requirements of the flooring and screed manufacturer.

Smart and Flexible R290 Heating

Tongyi’s R290 air-to-water heat pump combines intelligent control with flexible system integration. Cascade support makes it possible to meet higher heating demands, while holiday mode reduces unnecessary energy consumption when a property is unoccupied.

Additional Heating Source support provides extra reliability during demanding conditions, and the floor-drying programme assists with the commissioning of radiant heating systems.

Together with the energy monitoring, double-zone control and climate curve functions covered in Part I, these features create a flexible heating solution for modern homes and larger properties.

Discover how Tongyi’s R290 air-to-water heat pump can provide smarter control, greater comfort and more efficient heating throughout the year.