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At the moment you want to exploit this logic, the zones must be programmed accordingly: it does not make sense to have all the zones always in Comfort, but it makes sense to have them mainly or always in Economy (with set point that are in any case reasonable).

DHW Subsystem Surplus

Allo stesso modo si può dare una priorità al Sottosistema ACS (Nessuna, Bassa, Media o Alta):

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La logica prevede sempre che si passi da Economy (se il relativo set point è già soddisfatto) a Comfort.

Tra l’ACS e le zone non c'è priorità, quindi a parità di priorità vengono promosse contemporaneamente, senza dare la precedenza al sanitario.

Ad esempio si ipotizzi che le zone e l’ACS siano in Economy con relativo set point soddisfatto e che le priorità assegnate siano:

  • zona 1 → Alta

  • zona 2 → Alta

  • zona 3 → Bassa

  • zona 4 → Media

  • zona 5 → nessuna

  • ACS → Media

Ora ipotizziamo che il contatto del Surplus si chiuda, l’ordine di passaggio a Comfort è il seguente:

  • Zona 1 e Zona 2 → Comfort, una volta che entrambe soddisfano il set point Comfort

  • ACS e Zona 4 → Comfort, una volta che entrambe soddisfano il set point Comfort

  • Zona 3 → Comfort

la Zona 5 resterà in Economy o in Comfort in base alla programmazione in quanto non è interessata da questa logica.

Nel caso in cui arrivati ad aver promosso le zone con priorità Media in Comfort, la temperatura ambiente di una delle zone con priorità Alta non soddisfi più il set point Comfort, le zone con priorità Media verranno rimesse in Economy e il sistema cercherà di ri-soddisfare il set point Comfort delle zone a priorità Alta non più raggiuntiIn a similar way it is possible to give priority to the DHW Subsystem (None, Low, Medium, or High):

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The logic is always to switch from Economy (if the economy set point is already satisfied) to Comfort.

There is no priority between DHW and the zones, therefore with equal priority they are promoted at the same time, without giving priority to the domestic hot water.

For example, assume that the zone and the DHW are in Economy with relative set point satisfied, and the priorities assigned are:

  • Zone 1 → High

  • Zone 2 → High

  • Zone 3 → Low

  • Zone 4 → Medium

  • Zone 5 → None

  • DHW → Medium

Now let’s assume that the Surplus contact closes, the order of switching to Comfort is as follow:

  • Zone 1 and Zone 2 → Comfort, once they both meet the Comfort set point

  • DHW and Zone 4 → Comfort, once they both meet the Comfort set point

  • Zone 3 → Comfort

Zone 5 will remain in Economy or in Comfort according to the programming as it is not affected by this logic.

In the event that, once the zones with Medium priority have been promoted to Comfort, and the room temperature of one of the zones with High priority no longer meet the Comfort set point, the zones with Medium priority will be put back into Economy and the system will attempt to meet again the Comfort set point of the High priority zones no longer reached.