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Siemens Building Technologies Basic Documentation RVA63.242, RVA53.242 CE1P2373E
Landis & Staefa Division Description of OEM settings 26.03.2001
5.37 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 Unit Factory setting
0 / 1 Increment 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.
Benefit
Description
Setting
Effect
Note
Legionella
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