6.1.3 Delayed outdoor temperature adaptation
The calculated outdoor temperature is used to determine the flow temperature set point. The
heat response is delayed when the outdoor temperature either increases or decreases.
If the outdoor temperature varies by, for example, 12 °C within a very short period of time,
the calculated outdoor temperature is adapted to the actual outdoor temperature in small
steps. Assuming a
Delay of 3 °C/h, the linear adaptation would take =
12
3
°
°
C
C /h
= 4 h.
Note:
The delayed outdoor temperature adaptation helps avoid unnecessary overloads of
central heating stations caused by either overheated buildings occurring, for example, due to
warm winds, or temporarily insufficient heating due to the outdoor sensor being exposed to
direct sunshine.
Functions
WE
Configuration
F04 – Delayed outdoor temperature
0
F04 - 1
Parameter
WE
Range of values
P16 – Delay time for outdoor temperature
3 °C/h
1 to 6 °C/h
6.2
Fixed set point control
The flow temperature is controlled to the fixed value in
Flow temperature set point. In re-
duced operation, the flow set point is used for the control reduced by the amount in
Flow
temperature set-back in reduced operation. A connected outdoor sensor does not have any
affect on the control.
Functions
WE
Configuration
F01 – Control mode
1
F01 - 0
Parameters
WE
Range of values
P01 – Flow temperature set point
70 °C
0 to 150 °C
P02 – Flow temp. set-back in reduced operation
15 K
0 to 50 K
Note:
The return flow limitation and the potentiometer override are still active when config-
ured correspondingly.
20
EB 5757-7 EN
Functions