Siemens LMS14 User Manual page 189

Legionella funct circ pump
Building Technologies Division
Line no. Operating line
1647 Legionella funct circ pump
Off
On
During the time the Legionella function is performed, the DHW circulating pump can be
activated.
Off
Function is deactivated.
On
Function is activated.
When the function is activated, the circulating pump is switched on while the Legionella
function is performed as soon as the storage tank temperature (in the case of 2 sensors
the temperature acquired by the colder sensor) lies above the Legionella funct setpoint
minus 1 K. The pump runs during the set dwelling time. If the storage tank temperature
falls below the required Legionella funct setpoint by more than the DHW switching
differential plus 2 K, the circulating pump is deactivated.
Note!
Periodic Legionella function:
If the Legionella funct setpoint is reached via a non-controllable heat source (solar or
wood-fired boiler), the circulating pump is activated for the demanded dwelling time.
The Legionella function is performed a maximum of 3 days before the calculated day
for fighting legionella. When the Legionella function is completed (parameterized
dwelling time reached), the set Legionella funct duration commences again.
Warning!
During the time the Legionella function is effected, there is a risk of scalding
when opening the taps.
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07.05.2014