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Building Technologies Modular Heating Controller RMH760B CE1P3133en
HVAC Products 8 Main controller and primary controller 05.02.2007
8 Main controller and primary controller
8.1 Overview of function block
YQ
a
dd
d
Q
d d
B
d
B
V
Q
1
)
DC 0...10 V
a
0...10 V
Y
a
2
)
3
P
Heating
Heat demand
Heat requis.
Frost
Flow
Return
close
open
Main
pump
Main controller
a ddd
Q
d d
B
d
B
V
Q
1
)
DC 0...10 V
a
0...10 V
Y
a
2
)
3
P
Flow
Return
Heating
Frost
Primary controller
H
e
a
t
r
e
q
u
i
s
.
System
pump
close
open
In terms of control principle, both function blocks are primary controllers. For this rea-
son, 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) Main 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 preconfig-
ured.
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 configura-
tion”. A function block is activated by assigning an output to a terminal.
Controller diagrams
Basic configuration
Extra configuration
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