Siemens LMS14 User Manual

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Building Technologies Division User Manual LMS14... CC1U7471en
6 The settings in detail 07.05.2014
Line no. Operating line
HC1 HC2 HC3
732 1032 1332 24-hour heating limit
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.
The 24-hour heating limit function switches the heating system off when the current
outside temperature or the composite outside temperature rises to a level of one
adjusted differential below the current operating level.
The heating switches back on when the current outside temperature and the composite
outside temperature drop below the set difference minus 1 K again.
Note!
In Comfort mode, the function is always deactivated.
The required ECO temperature differential can be parameterized. The function can be
activated/deactivated.
T
t
0
1
8700
8704
H
1 K
732
1032
1332
TRw
7471d16/1014
Figure 20: Eco function – 24-hour heating limit
Key
Line no. Meaning
HC1 HC2 HC3
8700 TA Outside temperature
8704 TAgem Composite outside temperature
732 1032 1332 THG 24-hour heating limit
H Heating (1 = On, 0 = Off)
t Time
T Temperature
TRw Room temperature setpoint
Example:
Operating line E.g.
Room temperature setpoint 22 °C
24-hour heating limit (THG) -3 °C
Changeover temperature (room temperature setpoint – setpoint of 24-
hour heating limit), heating Off
= 19 °C
Switching differential (fixed) -1 K
Changeover temperature, heating On = 18 °C
24-hour heating limit

Siemens LMS14 Specifications

General

Brand	Siemens
Model	LMS14
Category	Control Unit
Language	English