Siemens LMS14 User Manual

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Building Technologies Division User Manual LMS14… CC1U7471en
6 The settings in detail 28.01.2015
6.20.2.2. Recharging the stratification storage tank
When recharging the stratification storage tank, only the upper section of the tank is
charged to the current DHW setpoint.
Recharging is started when the temperature acquired by sensor B3 at the top lies by at
least the parameterized Switching diff (5024) below the current DHW setpoint:
ON
DHW temp 1 (8830) < DHW temp setpoint (8831) – Switching diff (5024)
Recharging is ended when the temperature acquired by sensor B3 at the top exceeds
the DHW setpoint:
OFF
DHW temp 1 (8830) > DHW temp setpoint (8831)
The setpoint for the DHW charging temp (8836) at sensor B36 is calculated from the
DHW setpoint plus the parameterized Intermediate circuit boost (5140):
Temperature charging setpoint = DHW temp setpoint (8831) + Intermediate circuit boost (5140)
The Boiler setpoint (8311) is calculated via setpoint compensation. The mode of
operation of setpoint compensation is identical to that with full charging.
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 temp (8310) 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 recharging is active, the enable criterion for full charging does not
apply anymore, the DHW request is ended according to the criteria for full charging.
Line no. Operating line
8310
Boiler temp
8311
Boiler setpoint
8830
DHW temp 1
8831
DHW temp setpoint
8836
DHW charging temp
Line no. Operating line
2444
Fan speed DHW max
2460
Switching diff on DHW
2461
Switching diff off min DHW
2462
Switching diff off max DHW
5024
Switching diff
5140
Intermediate circuit boost
9525
Required speed LF min
9530
Required speed HF max
Info/diagnostics
A
dditional parameters

Siemens LMS14 Specifications

General

Brand	Siemens
Model	LMS14
Category	Control Unit
Language	English