Siemens LMS14 User Manual

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Building Technologies Division User Manual LMS14… CC1U7471en
6 The settings in detail 28.01.2015
6.11.30 Deaeration function
Using the automatic deaerator installed in the boiler, the function removes air from
the space heating and DHW system. For that purpose, the pumps in the system
are activated and deactivated according to a certain sequence.
The Deaeration function is performed in up to 4 preselectable phases. The phases
are termed heating circuit deaeration, DHW circuit deaeration, cycled pump control,
and static pump control for the entire phase. During these phases, a 3-port valve is
driven to a certain position.
When the preselected phases of the Deaeration function have elapsed, the
function is automatically ended. The Deaeration function can also be manually
aborted (for more detailed information, refer to chapter Central functions).
To ensure protection from scalding, the Deaeration function in the DLH diagrams is
aborted without delivering any message, if the boiler temperature at sensor B2
exceeds the maximum Nominal setpoint of the DHW temperature (OEM).
When this function is started, the burner control changes to
Standby, which means
that it is Off during the whole time the Deaeration function is performed.
Boiler pump
Heating circuit pump
Diverting valve
DHW pump
Wartezeit )
2
DHW, continuous operation (phase 3)
BZ 2663
Waiting time )
2
DHW, cycled (phase 4)
Number of repetitions
Cycle
T_ON T_OFF
Boiler pump
Heating circuit pump
Diverting valve
DHW pump
Heating circuit, continuous operation (phase 1)
BZ 2662
Heating circuit, cycled (phase 2)
Waiting time
1
)
Number of repetitions
Cycle
T_ON T_OFF
Continuation
Continuation
7471d60e/0111
Deaeration period, heating circuit
Deaeration period, DHW
Figure 50: Deaeration phases
Legend
1) Time required for opening the heating circuit mixing valve/3-port valve
2) Time required for opening the 3-port valve after DHW
(when parameterized Diverting valve present)
Line no. Meaning
2655 T-ON On time of the boiler/heating circuit pumps
2656 T-OFF Off time of the boiler/heating circuit pumps
2657 Number of repetitions
2662 Deaeration time heat circuit Duration of deaeration with continuous control of the
boiler/heating circuit pumps
2663 Deaeration time DHW Duration of deaeration with continuous control of the
boiler/DHW pumps

Siemens LMS14 Specifications

General

Brand	Siemens
Model	LMS14
Category	Control Unit
Language	English