Samson Trovis 5100 - Manual (Page 40)

If just one outdoor sensor should be connected, connect it to AF1. This outdoor temperature is
then used also for HK2 and HK3.
5.2.1 Gradient characteristic
Basically, the following rule applies: a decrease in the outdoor temperature causes the flow tem-
perature to increase. By varying the
Gradient and Level parameters, you can adapt the charac-
teristic to your individual requirements. Increasing Gradient results in a higher flow tempera-
ture, decreasing Gradient in a lower flow temperature. The parameter Level performs a parallel
transport of the heating characteristic in an upward or downward direction.
Outside the times-of-use, reduced set points are used for control:
Reduced flow set point =
Flow set point – Set-back difference.
The Max. flow temperature and Min. flow temperature parameters mark the upper and lower lim-
its of the flow temperature. A separate gradient characteristic can be selected for the limitation
of the return flow temperature.
Examples for adjusting the characteristic:
4
Old building, radiator design 90/70: Gradient approx. 1.8
4
New building, radiator design 70/55: Gradient approx. 1.4
4
New building, radiator design 55/45: Gradient approx. 1.0
4
Underfloor heating depending on arrangement: Gradient smaller 0.5
Functions WE Configuration
4-point characteristic OFF Co1, 2, 3 -> Fb10 = OFF
4-point characteristic OFF Co5 -> Fb03 = OFF (Anl 3, 5, 8 and 10)
Parameters WE Parameter level / Range of values
Gradient, flow 1.8 PA1, 2, 3 / 0.4 to 3.2
Level, flow 0 °C PA1, 2, 3 / –30 to 30 °C
Set-back difference 20 °C PA1, 2, 3 / 0 to 50 °C
Min. flow temperature 90 °C PA1, 2, 3 / 20 to 130 °C
Max. flow temperature 20 °C PA1, 2, 3 / 20 to 130 °C
5.2.2 4-point characteristic
The 4-point characteristic allows you to define your own heating characteristic.
It is defined by 4 points for the
Outdoor temperature, the Flow temperature and the Return flow
temperature. The Set-back difference at points 2 and 3 indicates how much the flow temperature
is reduced outside the times-of-use.
40
EB 5179 EN
Functions of the heating circuit