Ground source heat pump GSHP 12 MR 7612330

Power and Performance in a Single Module

A ground-source heat pump with a capacity of 12.66 kW (under conditions A0/W35) is a solution dedicated to single-family homes and smaller commercial buildings that require a stable heat source while optimizing operating costs. The device, designated as model GSHP 12 MR, features single-phase power supply (230 V), which significantly simplifies electrical connection in existing installations where three-phase power is not always available. Despite the lower supply voltage, the scroll compressor ensures a high efficiency coefficient COP of 4.09, translating into real energy savings compared to traditional heating boilers.

The device comes standard with passive or active cooling functionality (depending on the configuration of the lower source), allowing the heat pump to be used during summer months for indoor cooling. This means the investment in the heating system also covers air conditioning needs, eliminating the necessity to purchase additional equipment. The operating temperature limits for the lower source range from -15°C to +35°C, providing great flexibility in designing ground heat exchangers – both horizontal collectors and vertical probes.

Comprehensive Construction and Ready-to-Mount Design

The pump module has been designed to minimize installation time and the number of external components requiring separate purchase. Inside the housing, a complete hydraulic and refrigeration circuit is integrated. The heart of the device is a high-performance hermetic scroll compressor, characterized by high reliability and quiet operation; its resistance to short current spikes is ensured by a built-in soft starter (electronic start-up relief). Heat exchange is achieved through plate heat exchangers – condenser and evaporator – made of corrosion-resistant materials.

A key element enabling the reversal of the refrigerant flow direction for cooling mode is a 4-way reversing valve. The system is protected by high and low-pressure pressure switches and a filter drier, which safeguard the installation against damage resulting from improper operation or refrigerant contamination. For the 12 kW model, the manufacturer has also provided a 10-liter expansion vessel on the primary side (source) and a second vessel on the secondary side (heating). This is a significant convenience for the installer, who does not need to purchase and mount these components externally. Additionally, the system is equipped with a flow meter on the heating side and a flow sensor on the lower source side, allowing the controller to precisely monitor system operation and respond to any flow failures.

Intelligent Control and User Comfort

Control over the entire system is managed by an advanced DE DIETRICH controller from the iSystem series. Its interface allows not only setting the heat pump operating parameters but also managing complex heating installations. The controller supports up to three independent heating circuits as well as the domestic hot water circulation pump. For installers, this means easy integration with existing underfloor or radiator systems without the need for additional control modules.

It is worth noting that the device features sound-insulating insulation, which reduces noise generated by the compressor and circulation pumps – crucial when installing the heat pump inside a building or near bedrooms. If necessary to increase heating capacity (e.g., during severe frosts), it is possible to connect a supplementary electric heater kit (available as an option). The entire system is covered by a 5-year manufacturer warranty from DE DIETRICH, providing solid investment protection for the end customer.

Application and Compatibility of Lower Sources

The device is universal regarding the lower heat source. It can operate as a glycol/water type heat pump (utilizing ground energy via horizontal collectors or vertical probes) and as a water/water type heat pump (extracting heat directly from deep wells). For versions operating with groundwater, an additional intermediate heat exchanger (available as an option) may be required to protect the evaporator against corrosion and deposition of impurities characteristic of groundwater. The maximum heating water temperature is +80°C in heating mode and +25°C in cooling mode, given appropriate lower source parameters. This system is ideally suited