Table of Contents
Advertisement
Additional parameters
Building Technologies Division
6.18.3 DHW charging with 2 sensors
In the case of DHW heating with 2 sensors (B3 and B31), the charging request is also
made via a 2-position controller.
If both DHW temperatures are lower than the current setpoint minus the set switching
differential, DHW charging is started.
DHW charging is ended when both temperatures reach the current setpoint.
When DHW heating is released for the first time in the morning, forced charging takes
place, which means that DHW charging will also be started when only one of the DHW
temperatures lies below the current setpoint. But if the temperature lies less than 1 K
below the setpoint, charging will not take place.
Note!
In the case of charging with 2 sensors, the switching differential can be set to 0 K.
Line no.
Operating line
5012
Dhw forced charging
5022
Type of charging
5024
Switching diff
6.18.4 DHW charging with thermostat
In place of a temperature sensor, it is also possible to use a thermostat.
With this application, DHW heating is only dependent on the thermostat's contact
position and the release of DHW heating.
DHW charging is started when the thermostat's contact indicates cold (contact closed)
and the current DHW setpoint is the Nominal setpoint.
DHW charging is ended when the thermostat's contact opens. If the current DHW
setpoint changes to Reduced or the Frost protection level, DHW charging is aborted.
The adjusted setpoints are of no importance since temperatures cannot be acquired.
The thermostat must be connected to terminal B3. A sensor connected to terminal B31
can only be used for solar integration.
When using DHW heating with a thermostat, the Legionella function is never activated
because there is no sensor.
If DHW heating is switching off, even the cold thermostat triggers no request. This
means that when DHW heating is switched off, frost protection cannot be ensured
either.
User Manual LMS14...
6 The settings in detail
315/617
CC1U7471en
28.01.2015
Advertisement
Table of Contents
