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Benefit
Description
Setting
Effect
Note
Legionella
Siemens Building Technologies
Landis & Staefa Division
3.27
Legionella function
Potential legionella viruses will be killed.
The legionella function ensures that the d.h.w. in the storage tank will periodically be
raised to a higher temperature, thus making certain that potential legionella viruses are
killed.
Setting range
0 / 1
The setting activates or deactivates the legionella function.
Entry:
0
OFF: Function not active.
1
ON: The function will be activated every Monday morning when d.h.w. is heated
up for the first time and lasts a maximum of 2.5 hours. The d.h.w. is heated up to
the adjusted legionella setpoint. Also refer to "setpoint of legionella function" in
Index (line 37
).
OEM
• This function is possible only when d.h.w. heating is released by the d.h.w. heating
program.
• If the legionella function is aborted during the usual time (on Mondays), it will be
repeated the next time the d.h.w. setpoint is changed.
Legionellas are viruses that can occur in hot water installations which can cause
pneumonia (legionnaires' disease). To minimize the risk, it is important to maintain hot
water temperatures at or periodically raise them to a predetermined level.
The risk of spreading exists especially in central hot water installations with extensive
piping and in air conditioning plants with air humidifiers. To minimize the risk of
infection, it is very important to properly install and maintain such plant.
In large plants, it must be ensured that the water outlet temperature is not lower than 60
°C and that the temperature in the piping system does not drop by more than 5 °C.
Basic Dokumentation RVA63.280, RVA53.280
Unit
Increment
Factory setting
1
157/184
CE1P2374E
19.04.2001
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