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Siemens Basic Documentation RVP340, RVP350, RVP351 CE1P2545en
Building Technologies 16 Function block: Legionella function 15.03.2011
16 Function block: Legionella function
When using d.h.w. heating systems with storage tanks, the legionella function pre-
vents excessive concentrations of legionella viruses. 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
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 function
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 set-
point on a weekly basis. Setting 1 raises the d.h.w. temperature every Monday,
setting 2 every Tuesday, etc.
16.1.3 Starting point
The time of day 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.
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