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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
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
H
eat
ing
Heat demand
Heat requis.
Fr
os
t
Fl
ow
R
etu
rn
cl
ose
op
en
Main
pump
Main controller
a d d d
Q
d d
B
d
B
V
Q
1)
D
C
0.
..10 V
a
0.
..1
0 V
Y
a
2)
3P
Flo
w
Re
tu
rn
He
at
in
g
Fr
os
t
Primary controller
Heat requis.
System
pump
cl
ose
op
en
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
31
3
3S
74
VlvMn/PrCtr
Mn/SyPu
Mn/SyPu B
Mn/SyPuEr
Mn/SyPuEr B
Mn/SyPuErFlow
31
3
3S
74
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
