Circuit management subsystems (sometimes referred to as “manifolds”) allow you to control the pumps and, when required, the mixing valves of the systems. The system can manage up to 8 Circuits, which can be activated by:
Zones
DHW
Dehumidifiers
Other Circuits (so called “child”, see FATHER CIRCUIT AND INTERLOCKED CIRCUIT)
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When a circuit is activated, three things may happen:
A pump (single or twin) is activated – see WATER PUMPS AND MIXING VALVES SETTINGS
A mixing valve is controlled in order to obtain a certain water outlet temperature
One or more sources are activated (see SOURCES SETTING IN THE CIRCUIT PAGEIRCUITO)
These three actions do not necessarily take place for each circuits; for example, a pump will be managed in the case of a direct circuit (not mixed), but the mixing valve will not be managed.
Note that here the definition of “pump” is rather generic, and refers to the device that puts water into circulation in the circuit; in some systems, this device can be a diverting valve (“zone valve”).
The “circuit” also performs another important function, closely linked to the management of the mixing valve; it calculated the desired water outlet temperature by applying various algorithms.
Circuit Working Mode
A circuit can, as a Zone, works in 4 different mode:
Comfort
Economy
Antifreeze
OFF
A circuit working mode is determined by the subsystems that activated it:
If activated by a Zone, or by the DHW subsystem, it assumes the working mode of the zone
If activated ONLY by a Dehumidifier, it assumes the ECONOMY working mode
If activated by a child circuit, it assumes the circuit child mode
When several subsystems require the circuit to be activated at the same time, the circuit assumes the “major” working mode, among those required, where “major” means that:
Comfort > Economy > Antifreeze
Some example will be illustrated below:
The Zone 1, working in Economy mode, is linked to Circuit 1. In this case, the Circuit starts working in Economy mode, as required by the zone.
Two Zones are connected to Circuit 1, one with Comfort operation and one with Economy operation. In this case, the Circuit will also be set to Comfort mode for, of the two zones, the one with highest priority is Comfort.
To Circuit 1 is connected a Dehumidifier which is currently active and Zone 1, set to Antifreeze mode. In this case, the Circuit assumes the Economy operating mode as it has priority over the Antifreeze mode.
Circuit 1 is activated by the “child” Circuit 2, operating in Comfort mode and Zone 1, operating in Economy. In this case the Circuit will also be set in Comfort mode for, of the two working mode, the one with highest priority is Comfort.
Sensors Setting
To each circuit it is possible to assign one description (see DESCRIPTIONS) and one water outlet and inlet sensor (see ANALOG AND DIGITAL INPUT MULTIPLEXER). The water inlet sensor is not used in the calculations.
Correction is also available for the water outlet sensor.
The measured outlet and inlet temperature can be visualized in the “Circuit/Manifolds Status” section, as well as the current Working Mode of the circuit:
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Set Point Setting
Each circuit has both the Winter (Comfort or Economy or Antifreeze) and Summer (Comfort or Economy) Regulation, an offset that can be negative or positive and different for summer and winter, and a fixed Antifreeze Set only for winter:
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In particular for summer and winter, it is possible to choose from the following options:
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Direct Set Point: to be used if there is no outdoor probe or if you want to keep fixed the water outlet of a circuit.
Climatic curve: to be used if there is the outdoor probe, the reference outdoor temperatures are in winter -10°C, 0°C, 10°C, and 20°C; in summer they are 10°C, 20°C, 30°C, and 40°C.
KD: unlike the above climatic curve where at intermediate temperatures (5°C or 25°C) the outlet temperature is calculated by linear interpolation, KD uses characteristic curves as in the example graph below. Kd is the slope of the curve. If you have a radiant system, Kd will be low (between 0,2 and 0,8), while with radiators it can rise below 1:
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It is possible to limit the outlet temperature between tMin and tMax and decide to which outdoor temperature (tOff) the system should switch off.
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KDM: it is like KD, but tMin and tMax values are acquired from boilers of a specific manufacturer (do not use)
From Zone x: TBD
From Source x: TBD
From outlet probe: TBD
From inlet probe: to be used when installing the REG-010AD product (see REG-010AD manual)
From DHW Set Point: the set point used comes from the one set and actual in the DHW subsystem (see DHW SET POINT)
Warning
The set point may be changed if AMBIENT COMPENSATIONis used.