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Siemens Basic Documentation RVP360 CE1P2546en
Building Technologies 16 Function block: Legionella function 2017-07-24
16 Function block: Legionella function
The legionella function prevents excessive concentrations of legionella viruses in
d.h.w. heating systems. The function ensures periodic heating up of the d.h.w. to a
sufficiently high temperature level for a certain dwelling time.
16.1 Operating lines
Line Function, parameter Factory setting
(range)
Unit Heating
circuit
147
Periodicity of legionella function
1 (0…7) - –
148
Starting point legionella function
05:00 (00:00…23:50) hh:mm –
149 Dwelling time at legionella setpoint 30 (0…360) min –
150 Circulating pump operates during the legionella func-
tion 1 (0 / 1) - –
16.1.1 Setpoint/switching on/off
"Setpoint legionella function" is to be adjusted via function block "D.h.w." on operat-
ing line 130. Setting --- deactivates the legionella function.
16.1.2 Periodicity of legionella function
Operating line 147 can be used to select the periodicity of the legionella function:
When using setting 0, the d.h.w. temperature is raised to the legionella setpoint
on a daily basis
When using setting 1 to 7, the d.h.w. temperature is raised to the legionella
setpoint on a weekly basis. Setting 1 raises the d.h.w. temperature every Mon-
day, setting 2 every Tuesday, etc.
16.1.3 Starting point
The time the legionella function shall be started can be set on operating line 148.
16.1.4 Dwelling time at legionella setpoint
Operating line 149 is used to define for what period of time the actual value of the
d.h.w. temperature must lie above the legionella setpoint (operating line130) for the
function to be considered fulfilled.