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Siemens
User Manual
CE1U2357en
Building Technologies
6 The settings in detail
2014-07-30
ECO functions
Line no.
Operating line
HC1
HC2
HCP
730
1030
1330
Summer/winter heating limit
732
1032
1332
24-hour heating limit
The summer / winter heating limit is used to switch the heating on and off in the course
of the year, depending on the temperature conditions. In “Automatic“ mode, switching
on / off takes place automatically, so there is no need for the user to do this manually.
By changing the setting, the respective periods of time will be shortened or extended.
Increase:
Winter operation will start
earlier
Summer operation will start
later
Decrease: Winter operation will start
later
Summer operation will start
earlier
·
The function is not active in operating mode ”Continuously Comfort temperature“
·
The display will show ECO
·
To give consideration to the building’s thermal dynamics, the outside temperature will
be attenuated
Example:
SWHG Summer/winter heating limit
TAged Attenuated outside temperature
t
Temperature
t
Days
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
intermediate seasons (spring and autumn), enabling the system to respond to short-
time temperature variations.
Example:
Setting line
E.g.
Comfort setpoint (TRw)
22°C
24-hour heating limit (THG)
-3°C
Changeover temperature (TRw-THG) heating off
= 19°C
Switching differential (fixed)
-1°C
Changeover temperature heating on
= 18°C
Summer/winter heating
limit
24-hour heating limit
ON
17
T
SWHG
TAged
°C
OFF
t
2
3
5
8
Z
0
8
SWHG +1 °C
SWHG -1 °C
16
18
19
20
5
0
10
15
