Basic Documentation

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Siemens Modular Heating Controller RMH760B CE1P3133en
Building Technologies 10 DHW heating 2017-09-29
10.3.4 Control priorities in DHW heating mode
The following diagram shows the priorities of the different choices of intervention via
digital inputs and via operation on the controller.
Lower numbers indicate higher priorities.
9
5
Off, Auto
On, Off
7
On, Off
8
On, Off
Cmf, Pcf, Eco, Prt
10
1
On, Off
3
4
6
2
On, Off
On, Off
On, Off
11
DHW charging
control
DHW operating
mode contact
Resulting operating mode
Legionella, Normal, Reduced, Protection
Pump,
mixing valve etc.
Calendar
Switching program
Resulting operating mode
Normal, Reduced, Protection
Forced charging
with push button
Settings legionella
function
Time switch
Auto, Normal,
Reduced, Protection
Legionella
on, off
Electric immersion heater
Holiday contact
Specual day contact
Interventions
via
digital inputs
Operating on the controller,
or via bus
Settings calendar
Special day, holidays
Time switch
Settings 24-hour program,
holiday/special day program
DHW plant operation selector
Wiring test
DHW mode selector
Priority
Size
Explanation
Wiring test During the wiring test (highest priority), the plant
components can be directly controlled, independent
of all other settings
The controller-internal safety functions will
be overridden!
Plant operation selector
The plant operation selector has
the second highest
priority and can only be overridden by the
controller-internal frost protection functions
Electric immersion
heater
When the heat source changes to summer
operation
, DHW heating, if installed, will switch over
to the electric immersion heater.
The controller-internal frost protection functions
continue to be ensured. By contrast, the legionella
program will be overridden
Legionella protection
The legionella program can be started in any of the
operating modes, with the exception of preselected
operating mode "Protection"
Plant types
DHW 0…DHW 5