TAC 2112, Manual Functional Description
7:6 (22), 0-004-7459-3 (GB) 1999-08-01, TAC AB
7.3.3 Reset curve for outdoor compensation
The correct amount of heating is supplied to the building throughout
the year by allowing the supply temperature to be changed as a
function of the damped outdoor temperature. This function is
described by the
reset curve
.
The reset curve is made of three adjustable curve points. The outer
points are firmly defined by the outdoor temperature, while the break
point in the middle of the curve is adjustable.
10
20
30
40
50
60
80
-10 0 5-5 10 15 20-15 25-20-25
P 19
P 21
P 20
P 18
70
-30
P 23
P 22
P 05
Parallel
shift ±°C
y0
y1
y2
x0 x1 x2
Damped
Reset curve for outdoor compensation of the supply temperature
The curve has a maximum and a minimum limit. The curve can also
be parallel-shifted up and down (does not apply if a reference sensor
is used).
Parameters
P No. Parameter Min. Max. Step Default Comments
P 05 Curve shift –40 °C 40 °C 0,5 °C 0 °C Without reference sensor only
P 06 Night setback –40 °C 40 °C 0,5 °C –10 °C Without reference sensor only
P 18 Curve point x1 –9 °C 19 °C 1 °C 5 °C
P 19 Curve point y0 P 20 120 °C 1 °C 60 °C
P 20 Curve point y1 P 21 P 19 1 °C 45 °C
P 21 Curve point y2 5 °C P 20 1 °C 18 °C
P 22 Min. supply temp. 0 °C P 23 0,5 °C 10 °C
P 23 Max. supply temp. P 22 120 °C 0,5 °C 80 °C
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