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Siemens Switzerland Ltd User manual RVS61.843 CE1U2355en_02
HVAC Products 6 The settings in detail 23. November 2007
• Periodically
The legionella function is repeated according to the interval set (1641). If the legionella
setpoint is attained via solar plant, independent of the time set, the period of time will be
started again.
• Fixed weekday
The legionella function can be activated on a fixed weekday (1642). When using this
setting, heating up to the legionella setpoint takes place on the selected weekday,
independent of previous storage tank temperatures.
During the period of time the legionella function is performed, the DHW circulating
pump can be activated.
During the period of time the legionella function is carried out, there is a risk of scalding
when opening the taps.
Circulating pump
Line no. Operating line
1660 Circulating pump release
Time program 3 / HCP
DHW release
Time program 4 / DHW
1661 Circulating pump cycling
1663 Circulation setpoint
When using setting “Release DHW“, the circulating pump runs when DHW heating is
released.
When the function is activated, the circulating pump is switched on for a fixed time of 10
minutes within the release time and then switched off again for 20 minutes.
The circulating pump is defined via the relevant setting of a relay output 1 - 4 (5891 -
5894).
If a sensor is installed in the DHW distribution pipe, the controller monitors its actual
value during the period of time the legionella function is performed. The adjusted
setpoint must be maintained at the sensor during the adjusted “Dwelling time“.
6.9 Hx pumps
Summary
Q15/18/19
Prerequisite for using the Hx pumps is an appropriately defined
Hx input (5950, 5960 or 6046). The input must be defined as
heat request, heat request 10 V, release swimming pool,
refrigeration request, or refrigeration request 10 V.
The Hx pumps (Q15 / Q18 / Q19) are put into operation when
there is a heat or refrigeration request at the respective input, or
when excess heat draw is called for.
The pumps are to be connected to the appropriately defined
multifunctional relay outputs Qx.. (6030 - 6032).
Legionella function
Legionella funct circ pump
Circulating pump release
Circulating pump cycling
Circulation setpoint
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