Siemens LMS14 User Manual

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Building Technologies Division User Manual LMS14… CC1U7471en
6 The settings in detail 28.01.2015
Line no. Operating line
4133 Comparative temp
DHW sensor B3
DHW sensor B31
Buffer sensor B4
Buffer sensor B41
Flow temp setpoint
Setpoint min
The comparative temperature for generating the temperature differential to sensor B22
can be selected via parameter:
 DHW storage tank (sensor B3 or B31)
 Buffer storage tank (sensor B4 or B41)
 Flow temperature setpoint (common)
 Minimum setpoint (fixed value)
The selection of the comparative temperature also defines the way the solid fuel boiler
is integrated into the hydraulic system and the available choice of functions.
Note!
If sensor B3, B31, B4, B41 or the flow temperature setpoint is used for the
comparative temperature, it is also possible to parameterize the minimum setpoint for
the pump’s switch-on criterion.
DHW storage tank
If sensor B3 or B31 is selected for the comparative temperature, this is the equivalent of
integrating the solid fuel boiler directly into the DHW storage tank. Setpoint min (4110)
is taken into account.
With this kind of integration, DHW charging pump Q3 is only used for DHW heating with
a heat source that has open-loop control and is not influenced by the temperature of the
wood-fired boiler.
B22
Q10
B3
B31
Q3
B2
Q1
K4
T
7471d34/1009
T
T
T
Figure 67: Boiler/burner control – DHW storage tank
Note!
Functions Excess heat discharge (forced signal to consumers) and Locks other heat
sources are active and must be deactivated, if necessary (Locks other heat sources
(4102), Excess heat discharge (4141)).
Comparative temp

Siemens LMS14 Specifications

General

Brand	Siemens
Model	LMS14
Category	Control Unit
Language	English