Operation manual for M RS 420 ESTYMA control unit
15
HEATING CURVE SELECTION
In the weather-compensated mode, it is very important to properly select the
heating curve so that it matches the building’s heat loses. If the heating curve is
selected correctly, the room temperature is virtually constant and almost identical
with the value set by the user, regardless of the outdoor temperature.
In many cases, the correct heating curve can only be determined as a result of
numerous adjustments over a considerable period of time.
In the first try, you should select a curve from ranges A, B or C. The descriptions
of the ranges are included in Table No. 2.
Precise curve adjustment should be made in line with the adjustment guidelines
included in Table No. 1.
Adjustment guidelines:
PROBLEM
ADJUSTMENT
Room temperature is too low within the
whole range of outdoor temperatures
Increase the curve offset.
Room temperature is too high within the
whole range of outdoor temperatures
Decrease the curve offset.
Room temperature is OK in the
transition period but it is too cold when
outdoor temperatures are low.
Increase the curve slope.
Room temperature is OK in the
transition period but it is too hot when
outdoor temperatures are low.
Decrease the curve slope.
Room temperature is OK when outdoor
temperatures are low but it is too cold in
the transition period.
Decrease the curve slope, increase the
curve offset.
Room temperature is OK when outdoor
temperatures are low but it is too hot in
the transition period.
Increase the curve slope,
decrease the curve offset.
Table 1: Heating curve selection.
