Basic Documentation

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Siemens Modular Heating Controller RMH760B CE1P3133en
Building Technologies 10 DHW heating 2017-09-29
Charging is started when the 2 following conditions are satisfied:
Temperature at the top sensor = 50 °C and
Temperature at the bottom sensor = 47 °C
Charging is ended when the 2 following conditions are satisfied:
Temperature at the top sensor = >55 °C and
Temperature at the bottom sensor = >52 °C
Charging would be ended with a stratification of 3 K and a storage tank outlet
temperature of 55°C.
Main menu > Settings > DHW > DHW
Operating line
Range
Factory setting
Switching differential
1…20 K
5 K
Setback DHW setpoint bottom
0…20 K
5 K
In operating modes "Normal " and "Reduced ", the storage tank temperature setpoint
corresponds to the adjusted setpoint.
In Protection mode
, the storage tank temperature shall not fall below the adjusted
setpoint. For this reason, the storage tank temperature setpoint will be raised by the
amount of the switching differential.
When the legionella program is active, it must be made certain that the storage tank will
be charged up to the legionella protection setpoint. To ensure this, the storage tank
temperature setpoint will be increased by the amount of the adjusted reduction of the
DHW setpoint at the bottom.
Operating state
Assigned setpoint
Normal
DHW setpoint = normal setpoint
Reduced
DHW setpoint = reduced setpoint
Protection
DHW setpoint = frost protection setpoint + switching differential
Legionella DHW setpoint = legionella protection setpoint + reduction of
DHW setpoint at the bottom
10.4.2 Forced charging
Normally, storage tank charging is started only when the storage tank temperature has
fallen below the switch-on point (storage tank temperature setpoint minus switching
differential). Forced charging can enforce charging even if this switch-on criterion is not
satisfied.
If forced charging is activated and the storage tank temperature lies at least 1 K below
the normal setpoint
, forced charging will be started.
Charging will be ended via the storage tank temperature.
Norm
Red
OFF
ON
3133 D07
SDDhw
TStTaSetp
t
Without forced charging
Starting charging
Ending charging
Settings
Storage tank
temperature setpoint
Summary:
Starting forced charging
Ending forced charging