Siemens LMS14 User Manual page 345

Setpoint compensation has a control range from -100% to +50% and is applied to the
parameterized Flow setpoint boost (5020).
This means that setpoint compensation can readjust the Boiler setpoint (8311)
downward to the DHW temp setpoint (8831) and upward to the DHW temp setpoint
(8831) plus 1.5 times the Flow setpoint boost (5020).
Ending the DHW request:
If sensor B36 is parameterized for detecting the end of full charging (Full charging with
B36 = Yes), full charging is ended when the temperature at sensor B36 exceeds the
charging setpoint by the value of Excess interm circ temp max (5141), and the
temperature acquired by the storage tank sensor at the top reaches the DHW setpoint:
OFF
DHW temp 1 (8830) > DHW temp setpoint (8831)
and
DHW charging temp (8836) > Temperature charging setpoint + Excess interm circ temp max (514
If sensor B31 at the bottom is installed and sensor B36 is not parameterized for
detecting the end of full charging (Full charging with B36 = No), full charging is ended
when the temperature at both storage tank sensors reaches the DHW setpoint:
OFF
DHW temp 1 (8830) > DHW temp setpoint (8831)
and
DHW temp 2 (8832) > DHW temp setpoint (8831)
The burner is switched on when the Boiler temp (8310) lies by at least the
parameterized Switching diff on DHW (2460) below the Boiler setpoint (8311). It is
switched off when the boiler temperature lies by at least the parameterized Switching
diff off min DHW (2461)/Switching diff off max DHW (2462) above the Boiler setpoint
(8311).
The output request to the burner is controlled between the parameterized Required
speed LF min (9525) and the maximum output in DHW mode Fan speed DHW max
(2444). If no maximum output for DHW mode is parameterized (OSV), the burner's
maximum output, Required speed HF max (9530), will be available.
If, during the time full charging is active, the enable criterion for full charging does not
apply anymore, the DHW request is ended according to the criteria for recharging.
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Building Technologies Division User Manual LMS14... CC1U7471en
6 The settings in detail 28.01.2015