Basic Documentation

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Siemens Modular Heating Controller RMH760B CE1P3133en
Building Technologies 8 Main controller and primary controller 2017-09-29
8 Main controller and primary controller
8.1 Overview of function block
Y Q
a
d d
d
Q
d d
B
d
B
V
Q
1)
DC 0...10 V
a
0...10 V
Y
a
2)
3P
Heating
Heat demand
Heat requis.
Frost
Flow
Return
close
open
Main
pump
Main controller
a d d d
Q
d d
B
d
B
V
Q
1)
DC 0...10 V
a
0...10 V
Y
a
2)
3P
Flow
Return
Heating
Frost
Primary controller
Heat requis.
System
pump
close
open
In terms of control principle, both function blocks are primary controllers. For this
reason, the term "primary controller" is used for both function blocks in the following
descriptions, unless specific reference to function block "primary controller" is made.
T
T
TRt
TFl
3133S74
VlvMn/PrCtr
Mn/SyPu
Mn/SyPu B
Mn/SyPuEr
Mn/SyPuEr B
Mn/SyPuErFlow
3133S74
T
T
TRt
TFl
VlvMn/PrCtr
Mn/SyPu
Mn/SyPu B
Mn/SyPuEr
Mn/SyPuEr B
Mn/SyPuErFlow
Primary controller
(use of mixing valve)
M
ain controller (use of heat exchanger)
Mn/SyPu
Main / system pump
Mn/SyPu B
Main / system pump B
Mn/SyPuEr
Fault input main pump / system pump
Mn/SyPuEr B
Fault input main pump / system pump B
Mn/SyPuErFlow
Flow supervision main pump / system pump
TFl
Flow temperature sensor
TRt
Return temperature sensor
VlvMn/PrCtr
Mixing valve / 2-port valve
8.2 Configuration
With plant types H1-x, the main controller comes activated per default. In that case, it is
always the valve, the flow and return temperature sensor that are preconfigured.
With plant types H2-x, the primary controller comes activated per default. In that case, it
is always the mixing valve, a pump and the flow temperature sensor that are
preconfigured.
For more detailed information, refer to section 3.2 "Basic configuration".
With all the other plant types, the function blocks can be activated via "Extra
configuration". A function block is activated by assigning an output to a terminal.
Controller diagrams
Basic configuration
Extra configuration