Siemens LMS14 User Manual page 290

Additional parameters
Recooling via heat
source/cooling source/
space heating
Additional parameters
Key
290/617
Building Technologies Division
Note!
The switching differential for recooling (SdRü) corresponds to the value of the switch-
on differential (SdEin) of the charging controller, but is limited for recooling to a
minimum of 3 °C.
The function is performed with sensor B3/B4 if sensor B31/B41 at the bottom is not
connected. The function is not available if there are no storage tank sensors.
Line no. Operating line
Menu: DHW storage tank
5024 Switching diff (DHW storage tank)
5055 Recooling temp (DHW storage tank)
5057 Recooling collector (DHW storage tank)
Menu: Buffer storage tank
4755 Recooling temp (buffer storage tank)
4757 Recooling collector (buffer storage tank)
Surplus energy in the storage tank can be released to the environment via the heat
source/cooling source and space heating. With this function, the heat in the storage
tank is delivered to the heat source by means of charging pump Q3/source pump, the
heating circuit pump is activated and the mixing valve opened.
Caution!
To enable forced switching on of the heating circuits, the Recooling storage
tank function must be activated (can be set for each heating circuit).
Heating circuits that are already in operation draw more heat.
If there is no sensor B3/B4, the function is not performed.
If the upper storage tank temperature at sensor B3/B4 lies 2 K above the recooling
temperature and if the heat source temperature lies at least SdRü below the storage
tank temperature, the DHW charging pump/source pump is activated (storage tank
temperature > recooling temperature and storage tank temperature > heat source
temperature + SdRü).
If the storage tank temperature only lies by the switching differential above the heat
source temperature, the DHW charging pump/source pump is deactivated (storage tank
temperature > heat source temperature + switching differential).
If the storage tank temperature falls below the recooling temperature, the function is
ended (storage tank temperature < recooling temperature).
Line no. Operating line
Menu: DHW storage tank
5024 Switching diff (DHW storage tank)
Recooling temp (DHW storage tank)
5055
5056 Recooling heat gen/HCs (DHW storage tank)
Menu: Buffer storage tank
Recooling temp (buffer storage tank)
4755
4756 Recooling DHW/HCs (buffer storage tank)
Line no. Meaning
SdRü
User Manual LMS14...
6 The settings in detail
Switching differential for recooling
CC1U7471en
28.01.2015