Bedienungsanleitung Sorel MHCC 24V (Seite 20 von 28) (Englisch)

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The diagram shows the influence of the selected characteristic curve steepness

(standard curve) on the calculated reference flow

temperature of the heating unit. The correct characteristic curve is determined

by defining the intersection point of the maximal calculated flow temperature

(=design temperature) at minimal outdoor temperature.

Example: The design temperature of the heater 60 °C flow at lowest outdoor

temperature according to calculation of heat requirement

-12 °C. The intersection point renders a slope of 1.2 as the setting.

Day Correction

Parallel characteristic translation

The day correction causes a parallel shift of the heating curve during daytime operating hours, because with certain outdoor tem-

peratures the building might not be optimally heated with the set heating curve. With a non-optimised heating curve, the following situ-

ations frequently occur: hot weather = room too cold/cold weather = room too hot. In this case, the slope of the curve should be reduced

stepwise by 0.2 points and increases the day correction

by 2 ... 4 °C each.

Night Correction

Parallel characteristic translation

The night correction produces a parallel translation of the heating characteristic during the nighttime operating hours. If a negative value

is set for the night correction, the reference flow temperature is lowered accordingly during the nighttime operating hours. In this manner,

primarily at night, but also during the day when no-one is at home, the room temperature is lowered, thus saving energy. Example: A

day correction of +5 °C and a night correction of -2 °C produces a reference flow temperature in nighttime operation that is 7 °C lower.

Comfort Temperature Boost

Parallel characteristic translation

The comfort temperature boost is added to the set day correction. In this manner it is possible to carry out quick heating and/or raise the

temperature of living spaces at a certain time each day.

Min. Flow

The minimum flow temperature is the lower limit of the heating curve, and by this, the reference flow temperature of the heating circuit. In

addition to that, the minimal flow temperature is the reference flow temperature for the frost protection function.

Max. Flow

This value is the upper limit of the reference flow temperature of the heating circuit If however, the temperature of the heating circuit

exceeds the set value, the heat circuit shuts down until the temperature falls below this value. After 55 seconds, rinse for 5 seconds.

The customer must provide an additional limiting thermostat which is connected to the pumps in series (eg underfloor heat-

ing) for safety.

Heating circuit off

If you use a room controller, the heating circuit can also be switched off on the base of the room controller in addition to the switch-off

according to outside temperature.

Summer: Heating circuit turns off when the summer/winter time changeover (outside temperature) is exceeded.

Summer + Room: Heating circuit is turned off as soon as the summer/winter time changeover (outside temperature) or the room set-

point temperatures are exceeded.

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