Siemens LMS14 User Manual page 280

Charging temp min buffer
Key
280/617
Building Technologies Division
Line no. Operating line
3815 Charging temp min buffer
This function is used to activate the collector pump only when the collector temperature
reaches a certain minimum level. In addition, the required temperature differential to the
storage tank must be reached.
Note!
If the function is deactivated, the collector pump is switched on whenever the
required temperature differential to the storage tank is reached.
If the collector temperature lies below the minimum charging temperature, charging is
aborted (even if the temperature differential still exists):
Collector temperature < minimum collector temperature.
If the collector temperature exceeds the minimum charging temperature by the
switching differential (switch-on threshold – switch-off threshold) and the required
temperature differential exists, charging can take place:
Collector temperature > minimum collector temperature + (switch-on threshold – switch-
off threshold).
T
TSpMin
Q5 on
Figure 56: Charging controller – charging temperature minimum buffer
Meaning
T Temperature
B6 Collector sensor
TSpMin Minimum storage tank temperature
SDon Switching differential On
SDoff Switching differential Off
Q5 Collector pump (On/Off)
t Time
User Manual LMS14...
6 The settings in detail
B6
SDon - SDoff
off on
7471d20/1009
t
CC1U7471en
28.01.2015