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Building Technologies Modular Heating Controller RMH760B CE1P3133en
HVAC Products 10 DHW heating 05.02.2007
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
3133D07
SDDhw
TStTaSetp
t
Without forced charging
Norm
Red
OFF
ON
3133D08
SDDhw
TStTaSetp
t
With forced charging
SDDhw Switching differential DHW heating Red DHW operating mode “Reduced”
Norm DHW operating mode “Normal” t Time
Push DHW push, forced charging triggered TstTa Temperature at the storage tank sensor
Settings
Storage tank tempera-
ture setpoint
Summary:
Starting forced charging
Ending forced charging
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