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Commissioning and adjustment
Setting parameters
Display
Function 7: Differential temp ctrl (multi boil-
er system)
24
(cont.)
Value
03:7
Explanations
Temperature sensors used for function 6:
Boiler water temperature sensor at plug
■
Vitotronic control unit
or
Boiler water temperature sensor at plug 3A/3B of
the burner control unit
If the target temperature needs to be controlled dif-
■
ferently, e.g. through the flow temperature in the
boiler circuit, an additional temperature sensor can
be connected to plug S3 of the pump module. In
this case, parameter "2B:1" should be set.
Buffer temperature sensor at plug
■
Vitotronic control unit
Alternatively, an additional buffer temperature sen-
■
sor can be connected to pump module plug S4. In
this case, set parameter "2C:1".
Note
For further setting options for function 6, see parame-
ters "07", "08", "09", "0D", "0E" and "0F".
Function 7:
For multi boiler systems with low loss header only
A
Oil/gas boiler
A
Common boiler flow temperature sensor S1
B
C
Temperature sensor, low loss header
Heating circuit
D
Low loss header
E
Common boiler return temperature sensor S2
F
Feed pump
G
of the
§
)
of the
D
C
M
B
E
G
F
)
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