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Introduction

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  1. The system calculates the Dew Point Temperature (Dew Point) for each zone equipped with a temperature+humidity sensor, that is the critical temperature below which condensation forms under the zone’s current conditions.

  2. The Dew Point Temperature, corrected by an offset that can be set differently from zone to zone (Dew Point Control parameter, indicated as Ctrl DP in the Configuration Zone/1 sub page), is compared with the Outlet temperature of the circuit serving the zone; if the water temperature is equal or below the calculated limit, there are the conditions for condensation formation.

  3. If the circuit serving the zone is equipped with a mixed valve controlled by the REG System, the Outlet temperature of the circuit is increased if the water temperature is too close to the Dew Point Temperature, otherwise the zone will be blocked.

Note

For zones used as “Integration” to the dehumidifiers in Cooling system, the Dew Point Control (Ctrl DP) value must be set very high (in the order of 20°C), because the associated user does not act directly on the radiant surface, but it is a “Support” to the action of the dehumidifier.

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  • Screed thickness

  • Materials used for floor construction

  • Radiant system pipes materials

Note

Within the Zone section (in the red frame), for each zone equipped with humidity and temperature sensor, the Dew Point (°C), indicated by the abbreviation DP in the green frame, is calculated:

PHOTO TBD

for the zones without humidity sensor, the DP is NC, not calculated.

The calculated DP must be compared with the floor surface temperature, which is the sum of the cold-water temperature and of a delta that take into consideration the type of covering. The parameter that allows the delta to be taken into account is the Dew Point Control (K, Kelvin degrees are used to indicate that the parameter is a temperature difference and not a temperature value), indicated by the abbreviation Ctrl DP in the green frame:

per le zona senza sensore di umidità il PdR è NC, non calcolato.

Il PdR calcolato deve essere confrontato con la temperatura superficiale del pavimento che è la somma della temperatura dell’acqua fredda e di un delta che tiene conto della tipologia di rivestimento. Il parametro che consente di tener conto del delta è il Controllo del Punto di Rugiada (K, si utilizzano i gradi Kelvin per indicare che il parametro è una differenza di temperatura e non un valore di temperatura) indicato dalla sigla Ctrl PdR nel riquadro verde:

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Quindi si consideri ad esempio la zona 6 per cui il punto di rugiada calcolato è 15°C e il controllo del Punto di Rugiada è pari a 3 K. Il punto di Rugiada calcolato (15°C) non verrà confrontato con il valore letto dalla sonda di mandata del collettore associato alla zona (C2), ma con il valore letto dalla sonda di C2 + 3 K. La zona 6 si bloccherà per prevenire la condensa se la temperatura dell’acqua di mandata del circuito C2 associato sarà inferiore a PHOTO TBD

Let us, for example, consider the zone 6, for which the calculated dew point is 15°C and the Dew Point control is equal to 3 K. The calculated dew point (15°C) will not be compared to the value read by the circuit water outlet temperature associated with the zone (C2), but with the value read by the probe of C2 + 3 K. The zone 6 will be blocked to prevent condensation if the water outlet temperature of the associated C2 circuit is less then 12°C (15°C - 3 K). Mentre la zona 7 si bloccherà se la temperatura dell’acqua di mandata sempre del circuito C2 associato scende sotto i While zone 7 will be blocked if the water outlet temperature of the associated C2 circuit drops below 10,3°C (13,3°C - 3 K).

A destra di Ctrl PdR c'è un’altra colonna con indicato 0. Questa colonna fa si che il calcolo della temperatura da confrontare con il PdR calcolato tenga conto non solo della temperatura dell’acqua, ma anche della temperatura ambiente. Il valore della casella può andare da 0 a 100 (adimensionale):

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Se è indicato 0, vuol dire che la temperatura ambiente non viene considerata nel calcolo e che semplicemente il PdR viene confrontato con la temperatura di mandata dell’acqua + il delta K della casella Ctrl PdR;

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Se è indicato 100 vuol dire che la temperatura dell’acqua non viene considerata nel calcolo e che il PdR viene confrontato con la temperatura ambiente della zona;

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To the right of Ctrl DP is another column marked 0. This column ensures that the calculation of the temperature to be compared with the calculated DP takes into account not only the water temperature, but also the room temperature. The value in the box can range from 0 to 100 (dimensionless):

  • If 0 is indicated, it means that the room temperature is not considered in the calculation and that simply the DP is compared with the water outlet temperature + delta K of the Ctrl DP box;

  • If 100 is indicated, it means that water temperature is not considered in the calculation and that the DP is compared with the room temperature of the zone;

  • If a value between 1 a 99 is indicated, then a weighted average of the two temperatures is calculated to find the reference temperature to compare with DP. For example: I use 50, this means that the temperature to be compared with DP is = [(room T * 50) + (Outlet T + delta K) * 50]/100

2. Controllo della Temperatura di Mandata

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