Siemens QAA73.210 User Manual page 23

24-hour heating limit
(ECO24)
Gain factor of room
influence (KORR)
Siemens
Building Technologies
T
°C
20
19
18
17
16
H
ON
OFF
0 5
The 24-hour heating limit is used to switch the heating on and off in the course of
the day, depending on the outside temperature. This function is used primarily
during spring and autumn to respond to short-term temperature variations.
Example:
Setting line
Comfort setpoint (TRw)
24-hour heating limit (THG)
Changeover temperature (TRw-THG) heating off
Switching differential (fixed)
Changeover temperature
By changing the value entered, the respective heating periods will be shortened or
extended.
Increase: Heating mode will start earlier,
changeover to ECO later.
Decrease: Heating mode will start later,
changeover to ECO earlier.
· The function is not active in operating mode "Continuously Comfort temperature"
· To give consideration to the building's thermal dynamics, the outside
temperature will be attenuated
Defines the influence of room temperature setpoint deviations on the controlled
system. The room influence can be activated and deactivated (operating line 75).
Changing this setting has the following impact:
Increase: Authority of room influence will increase
Decrease: Authority of room influence will decrease
Room Unit for Boiler Control
Description of room unit settings
TAged
SuWi +1 °C
SuWi
SuWi -1 °C
t
10 15
heating on
Legend
TAged Attenuated outside
temperature
SuWi Summer / winter
changeover
temperature
T Temperature
t Time in days
H Heating
e.g.
22 °C
-3 °C
= 19 °C
-1 °C
= 18 °C
CE1U2283en
2015-09-16
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