Gradient Characteristic - Samson TROVIS 5575 Mounting And Operating Instructions

TROVIS 5575-000x and TROVIS 5575-001x:
The outdoor temperature is alternatively received over the device bus when the following
configurations are made:
CO7 -> F01- 1 and CO7 -> F07 - 1
An outdoor temperature input independent from AF1 can be sent over the device bus for a
second heating circuit following configurations are made:
CO2 -> F02 - 1 and CO7 -> F09 -> 1
A second outdoor sensor cannot be connected.
TROVIS 5575-002x:
Version without device bus: The outdoor temperature can be only be measured directly over
the outdoor sensor AF.

5.1.1 Gradient characteristic

Basically, the following rule applies: a decrease in the outdoor temperature causes the flow
temperature to increase. By varying the parameters Gradient and Level , you can adapt the
characteristic to your individual requirements. Increasing Gradient results in a higher flow
temperature, decreasing Gradient in a lower flow temperature. The parameter Level per-
forms a parallel transport of the heating characteristic in upward or downward direction.
Outside the times-of-use, reduced set points are used for control:
The reduced flow set point is calculated as the difference between the adjusted values for
Day set point (rated room temperature) and Night set point (reduced room temperature).
The parameters Max. flow temperature and Min. flow temperature mark the upper and lower
limits of the flow temperature. A separate gradient characteristic can be selected for the limi-
tation of the return flow temperature.
Examples for adjusting the characteristic:
4
Old building, radiator design 90/70:
4
New building, radiator design 70/55:
4
New building, radiator design 55/45:
4
Underfloor heating depending on arrangement: Gradient smaller 0.5
Note!
Particularly for control operation without room sensor, the adjusted room temperatures for
day (Day set point) and night (Night set point) only become effective satisfactorily when the
heating characteristic has been adapted to the building/heating surface layout.
Functions of the heating circuit
Gradient approx. 1.8
Gradient approx. 1.4
Gradient approx. 1.0
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EB 5575 EN