If forced charging is stopped because the heat pump had to be switched off, it will be
resumed as soon as the buffer storage tank temperature has dropped by 5 °C (heating)
or risen by 5 °C (cooling). At this point in time, forced charging must still be released,
and the number of permissible charging abortions must not be exceeded (2893).
Otherwise, the controller waits until forced charging is regularly triggered the next time.
In summer operation, or w
hen all heating circuits are in protective mode, forced
charging is locked.
Forced charging of the buffer storage tank is completed when the "Forced charging
setp cooling" (4708) is reached. When using setting "---", forced charging cooling is
deactivated. For forced charging to start, the storage tank temperature at the bottom
must lie at least 2 K above the adjusted setpoint. If there is no sensor at the bottom, the
storage tank sensor at the top is used.
Forced charging setp
cooling
The slave pointer used as setpoint with forced charging heating can be limited upwards
and downwards.
Forced charg setp heat
min / Forced charg setp
heat max
The slave poi
nter collects the maximum values of the temperature requests from the
heating circuit and saves them. Every midnight, the slave pointer setpoint is reduced by
10 %.
2392Z09
°C
t
*
4710
*
*
*
*
*
*
*
*
*
*
24:00 24:00
24:00 24:00 24:00 24:00 24:00
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
4709
* = individual temperature requests
4709 Forced charg setp heat min
4710 Forced charg setp heat max
Forced charging is started every day at the point in time set here (00:00 – 24:00). With
"- - -", forced charging is deactivated.
Forced charging time
Forced charging is aborted when the required setpoint has not beeen reached on
completion of the period of time set here.
Forced charg duration
max
Forced charging can also b
e triggered via input Ex using the "Low-tariff" setting.
Automatic locks
It is NOT forwarded to generation if the buffer storage tank is able to cover the heat
request placed on it (request is invalid).
Line no. Operating line
4720 Auto generation lock
None
With B4
With B4 and B41 / B42
4722 Temp diff buffer/HC
157/258
Siemens Switzerland Ltd User manual RVS61.843, RVS41.813 CE1U2355en_02
HVAC Products 6 The settings in detail 28. September 2009
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