The Worcester Bosch Three Phase Electric Back-Up Heater is a component designed for use with Worcester Bosch heat pump systems, primarily as a supplementary or backup heating solution. It serves to provide additional heating when the heat pump alone cannot meet the required demand, such as during extremely cold weather or periods of high heating demand.

Here are some key features and functions of this type of back-up heater:

• Three-Phase Power Supply: The unit operates on a three-phase electrical supply, which is typical for larger or more industrial applications. This ensures that it can handle higher electrical loads, providing reliable heating performance.
• Electric Heating: It uses electric resistance heating elements to generate heat, which can be quickly activated when the heat pump’s capacity is exceeded.
• Integration with Heat Pump Systems: The back-up heater is usually integrated with a Worcester Bosch air-source or ground-source heat pump, providing additional heating capacity when needed. It kicks in automatically when the heat pump can no longer efficiently supply enough heat, ensuring a consistent indoor temperature.
• Energy Efficiency: The three-phase electric heater is designed to be energy-efficient, helping to minimize energy consumption while still providing sufficient heating. However, it is generally used as a supplementary source of heat and is not the primary heating element.
• Size and Capacity: These units come in various sizes to suit different applications, from residential homes to commercial or larger-scale installations. The three-phase setup is more common in larger properties or businesses.
• Reliability: Worcester Bosch is known for providing high-quality, reliable heating solutions, and their back-up heaters are designed to maintain system efficiency and reliability, even during colder months.

In summary, the Worcester Bosch Three Phase Electric Back-Up Heater is a supplementary electric heating unit designed to work in tandem with a heat pump system to ensure consistent and reliable heating, especially during high-demand conditions or very low temperatures.