Function Overview; Heating Circuit - flamco meibes MeiTronic LFC Montage- Und Bedienungsanleitung

Function overview

Heating Circuit

Operating mode
Auto= Temperature as target flow temperature. Since the operating mode "Auto" is controlled by the outdoor temperature, it is
mandatory to connect a temperature sensor at S4. In auto-mode, the points 5.1.4, 5.1.5, 5.1.6 and 5.1.14 have an influence.
Reference Value = Fixed flow temperature regardless of the outdoor temperature. The desired flow temperature S1 must be set
in Menu 5.1.3.
Screed program = For the next 14 days, different fixed flow temperatures can be set under menu 4. After 14 days, the reference
temperature of the 14th day is used continuously until the operating mode is changed. Different temperature values can be set in
menu 5.4. for every individual day.
Room controllers, which have been set, have no influence on the setpoint program!
Curve
Type and slope of the heating characteristic curve.
The characteristic curve is used to control the heat dissipation of the heating circuit relative to the outdoor temperature. The
demand for heat differs due to factors such as the type of building, heating, insulation and outdoor temperature. For this reason,
the controller can operate with a normal straight curve (setting 'simple') or a split curve (setting 'split').
If 'simple' is selected, the curve is adjusted using the graphic diagram. While setting the slope, the controller also shows the slope
value and the calculated target flow temperature at -12 °C as a reference point.
If 'split' is selected, the curve is set according to the following steps:
1. Outdoor temperature for slope change
2. Slope above outdoor temperature for change
3. Slope below outdoor temperature for change
While setting the slope, the controller also shows the slope value and the calculated target flow temperature at -12 °C as a ref-
erence point. In case of repeated adjustment of the split curve, the settings appear in reverse order.
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 selected heating curve. With a non-optimised heating curve, the fol-
lowing situations 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 the day correction should be by 2 ... 4 °C each.
Night Correction
Parallel characteristic translation
The night correction produces a parallel translation of the heating characteristic during the night time operating hours. If a neg-
ative value is set for the night correction, the reference flow temperature will be decreased accordingly during the night time oper-
ating hours. In this manner, primarily at night, but also during the day when no-one is at home, the room temperature is
decreased, thus saving energy. Example: A day correction of +5 °C and a night correction of -2 °C produces a reference flow tem-
perature in nighttime operation that is 7 °C lower.
20
The diagram shows the influence of the slope of the selected char-
acteristic curve (standard curve) on the calculated reference flow
temperature of the heating unit. The correct characteristic curve is determ-
ined by defining the intersection point of the maximal calculated flow tem-
perature (=design temperature) at minimal outdoor temperature.
Example: The design temperature of the heater is 60 °C flow at lowest
outdoor temperature -12 °C according to calculation of heat requirement.
The intersection point in the example results in a slope of 1.2 as the set-
ting.