Basic Documentation

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Siemens Modular Heating Controller RMH760B CE1P3133en
Building Technologies 10 DHW heating 2017-09-29
Priority
Size
Explanation
Forced charging Using button "Forced charging" (DHW push),
recharging to the normal setpoint
can be triggered
in any of the operating modes. Forced charging can
also be performed during holiday periods
DHW operating mode
contact
Using the DHW operating mode contact, a fixed
operating mode can be preselected. This operating
mode overrides DHW operation selector
in the
controller
DHW operation
selector
Using the DHW operation selector, it is possible to
switch from operating mode Auto
to a continuous
operating mode with the respective setpoint.
In operating mode Auto
, the setpoint is
determined by the calendar and the time switch
Special day contact
The current 24-hour program will be overridden by
the special day contact. The associated special day
program is to be set on the DHW time switch
Holiday contact
The current 24-hour program can be overridden by
the holiday contact with a fixed setpoint
Calendar
Holidays/special days
If a special day is active, the associated 24-hour
program of the DHW time switch will be activated.
Holidays, if entered, will be overridden.
If holiday mode is active, a preselected fixed
setpoint can be maintained.
When using holiday operating mode Auto
, DHW
heating during the holiday period will not be
affected
Time switch
In the time switch, the associated 24-hour program
will be activated in accordance with the current
weekday
The control priorities with DHW plant type DHW 6 are analogous to those with
DHW 0…DHW 5. Exceptions:
• Forced charging
• Electric immersion heater
10.3.5 DHW setpoints
The setpoints for the operating modes (Normal / Reduced / Protection) can be
preselected by the plant user via operation. The setting values limit each other.
In addition, on the service level, the setpoints for the legionella program can be set. The
normal setpoint limits the setting range downward.
Main menu > DHW > Setpoints…
Operating line
Range
Factory setting
Legionella setpoint
55…140 °C
70 °C
Normal setpoint
40…70 °C
55 °C
Reduced setpoint
5…55 °C
40 °C
Frost protection setpoint
5…40 °C
5 °C
The setpoints preselected for storage tank charging or direct DHW consumption must
be matched to the setpoints of (optional) consumer control; in other words, the settings
selected here should at any point in time lie above the setpoints of consumer control. It
may be necessary to give consideration to the different time programs.
Plant type DHW 6
(direct
DHW heating)
Setpoints (setting)
Note on consumer control