Adapting the heating characteristic
A properly adapted heating characteristic results in a constant
room temperature even with varying outdoor temperatures. The
factory settings of the controller heating characteristic are de-
signed for an average building with radiator heating. If no room-
temperature sensor is available or if the reference room is not
typical for the entire building, the heating characteristic can be
adapted manually (see below for automatic correction). If the
set normal temperature (user adjustment value PAR no. 1) is not
reached after a couple days, corrections can be entered as fol-
lows (example for heating circuit 1):
Correct: PAR no. 1 in steps of 0.5 ° C max. and PAR no. 3 in
steps of 0.05 max. until the desired normal temperature is
reached. If possible, introduce only one change per day in order
to give the building time to adjust to the new condition.
If there is a second heating circuit, the same applies with the ap-
propriate parameters:
PAR 7 =
normal temperature of heating circuit 2
PAR 9 =
curve slope of heating circuit 2
and for the corresponding SERV adjustment values.
If a room-temperature sensor is available in a typical room
(reference room) of the building, an automatic adaptation of the
heating characteristic can be triggered via setting value
SERV 88.
It is essential for this mode that any thermostat valves installed
in this room remain in their fully open position.
By means of the measured deviations of the room temperature
from the corresponding setpoint and the average outdoor tem-
perature calculated for the measuring period, the system will
either.
•
adjust the slope of the heating characteristic (PAR 3);
or
•
adjust the curvature factor of the heating characteristic
(SERV 66);
or
•
shift the base point of the heating characteristic
(= external heat supply) horizontally.
The number of adaption steps executed is shown under
SERV 88
The automatic adaption of the heating characteristic parameters
is executed with high weighting factors for the first adaption steps
(if a deviation has been detected) and with reduced weighting
for the subsequent adaption steps.
Observation
Action
Normal temperature
too high
during warm
and cold
weather
Reduce normal temperature PAR no. 1
during warm
weather only
Reduce normal temperature (PAR no. 1) and increase slope
of heating characteristic (PAR no. 3)
during cold
weather only
Reduce slope of heating characteristic (PAR no. 3)
Normal temperature
too low
during warm
and cold
weather
Increase normal temperature (PAR no. 1)
during warm
weather only
Increase normal temperature (PAR no. 1) and reduce slope of
heating characteristic (PAR no. 3)
during cold
weather only
Increase slope of heating characteristic (PAR no. 3)
B01093
B01096
B01098
B01099
B01100
B01101
R
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13
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7 000458 003
