The system consists of a primary and secondary circuit.

The primary circuit includes:

·       Split heat pump

·       Water treatment devices (dirt separator and deaerator) for protecting generators and, more generally, all system components

·       Diverter valve for priority domestic hot water (DHW) production

·       Inertial hydraulic separator for separating the primary and secondary circuits and guaranteeing a minimum volume of water remains available for heat pump operation

·       System charging unit with pressure reducing valve and backflow preventer

The secondary circuit comprises:

·       Distribution manifold

·       Booster units with and without mixing valve

·       Heating & cooling and air treatment system

The solution is suitable for systems in which the heat pump circulator is not capable of directly supplying the heating and cooling system, or where there are specific requirements which necessitate the creation of a primary circuit and a secondary circuit. Possible operating modes are as follows:

·       Priority domestic hot water (DHW) production

·       Independent heating and cooling with different capacities and defrost cycle

The application of the inertial hydraulic separator allows booster units to serve the section of the system dedicated to them without reciprocal interference; it is also essential in ensuring the minimum volume of water required by the heat pump in partial secondary circuit load conditions; finally, it acts as a heat reserve for machine defrost cycles.

Domestic hot water production circuit with solar integration

The solar circuit consists of a solar circulation unit and a regulating controller for managing domestic hot water production in the storage tank, including heat pump integration, through control of the three-way priority valve. The domestic hot water distribution system is designed without recirculation and is equipped with a thermostatic mixing valve with strainers and check valves built into in the hot and cold water inlets. 

Note: The control, expansion and safety equipment must be sized according to the heating capacity and specific characteristics of the system, in compliance with current legislation. The electrical connections must be checked by the relevant organisations to guarantee observance of operational and regulatory requirements.