Siemens LMS14 User Manual

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Building Technologies Division User Manual LMS14... CC1U7471en
6 The settings in detail 07.05.2014
6.7.8 Pump overrun
On completion of DHW charging, the charging pump continues to operate for the
parameterized DHW overrun time. If none of the other consumers draws significant
amounts of heat, the heat source can generate a forced Overrun signal for the boiler
pump during that period of time. The overrun time can be set via the heat source
parameters.
On applications with diverting valve, the boiler pump overruns. The diverting valve
maintains the DHW charging position during the overrun time.
Pump overrun can be aborted by Discharging protection after DHW charging.
6.7.9 Legionella function
Line no. Operating line
1640 Legionella function
Off
Periodically
Fixed weekday
When the Legionella function is activated, the DHW storage tank temperature is
periodically raised to the Legionella funct setpoint. The Legionella funct setpoint can be
maintained during the set dwelling time.
Off
Function is deactivated.
Periodically
The Legionella function is repeated according to the period (Legionella funct
periodically 1641)). If the Legionella setpoint is attained via solar heating – independent
of the selected interval – the time period is started again.
This means that the heat source is switched on only if the solar plant was not able to
ensure the required Legionella funct setpoint within the set period of time.
Fixed weekday
(The Legionella function can be activated on a fixed Legionella funct weekday (1642)).
When using this setting, heating up to the Legionella setpoint takes place on the
selected weekday, independent of previous storage tank temperatures.
This setting is intended primarily for plant without solar integration.
Note!
Delayed start of Legionella function:
In connection with DHW storage tanks, the Legionella function is started 1 hour after
power ON at the earliest.
Warning!
During the time the Legionella function is performed, there is a risk of scalding
when opening the taps.
Legionella function

Siemens LMS14 Specifications

General

Brand	Siemens
Model	LMS14
Category	Control Unit
Language	English