Samson 5179 Thermostat User Manual


 
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