This scheme represents a solution for centralized systems in buildings with high demand for domestic hot water (DHW) and high contemporaneity of use. The configuration involves the use of multiple storage kettles, installed in series or in parallel, with the aim of dividing volumes, optimising temperature management and ensuring continuity of service even during any maintenance operations.
The sanitary loading and unloading of the kettles is managed flexibly, thanks to the presence of shut-off valves, which allow the exclusion of individual tanks in case of need. On the primary side, the temperature in the kettles is regulated by dedicated control valves, which modulate the heat transfer according to the instantaneous requests.
The system requires an accurate design of the hydraulic circuit, with particular attention to:
● to the correct position of the check valves to avoid reverse flows,
● balancing the circuits both on the primary side (heating) and on the sanitary side (DHW),
● the adoption of autonomous flow adjustment devices, such as AUTOFLOW® valves, to maintain the balance between the kettles.
This solution is particularly suitable for medium and large residential and commercial buildings, as well as accommodation facilities, where continuous availability of DHW is a critical requirement.
In terms of performance, the system offers high efficiency during peak consumption, thanks to the modularity of the storage. It is also effective from a hygienic point of view, as it allows the thermal control of Legionella and facilitates routine maintenance operations, being able to isolate and clean individual kettles without interrupting the overall service.
