Dhw Storage Tank; Types Of Heat Request; Dhw Charging With One Sensor - Siemens LMS14 User Manual

Key
Additional parameters
314/617
Building Technologies Division

6.18 DHW storage tank

6.18.1 Types of heat request

When a DHW charging request to the boiler, the electric immersion heater is made, a
sensor or thermostat must be connected to terminal B3.
Available sensors
B3 B31
--

Sensor --
Sensor Sensor
Thermostat

-- No sensor connected
With or without sensor

SD Switching differential

6.18.2 DHW charging with one sensor

In the case of DHW heating with one sensor (B3), the charging request is made via a 2-
position controller.
If the DHW temperature is lower than the current setpoint minus the set switching
differential, DHW charging is started.
DHW charging is ended when the temperature reaches the current setpoint.
When DHW heating is released for the first time in the morning, forced charging takes
place, which means that DHW charging is also started when the DHW temperature lies
within the switching differential. But if the temperature lies less than 1 K below the
setpoint, charging will not take place.
Note!
If a sensor is connected to terminal B31, it can be used for solar integration.
Line no. Operating line
5012 Dhw forced charging
5022 Type of charging
5024 Switching diff
User Manual LMS14...
6 The settings in detail
Type of heat request to the boiler/electric immersion
heater
No DHW request
B3/SD
B3/SD or B3 start/B31 stop
Contact start/stop
CC1U7471en
28.01.2015