Functions in connection with the function extension 0 – 10 V (accessory)
Functions
Vitotronic
100 200 300 300-K 200-H
0 – 10 V input aVF
Defaulting an additional set boiler water temperature
and
x x x x –
Boiler enable in multi-boiler systems x – – – –
Switching output aBJ (zero volt contact)
Night contact (to signal reduced mode and to switch the heating circuit
pump to a lower speed)
or
– x x x x
Switching a feed pump – – – – x
Function extension in single boiler systems
Defaulting an additional set value (0 - 10 V input
aVF
)
Boiler control unit Function
Vitotronic 200
or
Vitotronic 300
or
Vitotronic 100 (code "01:1")
Requirements arising from the controlled operation of the Vitotronic
0 – 10 V hook-up provides an additional set value
Function extension in multi-boiler systems
Defaulting an additional set value (0 - 10 V input
aVF
)
Boiler control unit Function
Vitotronic 100
and
Vitotronic 300-K
Connect the function extension to the Vitotronic 300-K
Requirements arising from the controlled operation of the Vitotronic
0 – 10 V hook-up provides an additional set value
Multi-boiler system with third party cascade
Vitotronic 100 (code "01:3")
with enable via a 0 - 10 V signal
Connect the function extension to the Vitotronic 100
Boiler circuit control via 0 – 10 V hook-up
0 to 1 V
– Boiler blocked
– Close butterfly valve
– Boiler circuit or shunt pump OFF
1 to 10 V
– Boiler water temperature default
– Boiler enabled; held at minimum temperature
– Butterfly valve open
– Boiler circuit or shunt pump enabled
Note
On the lead boiler, the voltage must be higher than 1 V.
Vitotronic 100
with 0 – 10 V signal and enable via a switching output
aVH
Connect the function extension to the Vitotronic 100
The boiler is enabled; the boiler is held at its minimum temperature
1 – 10 V additional temperature default
Note
This contact must always be closed on the lead boiler.
Cylinder temperature sensor
Part no. 7450 633
Control units
(cont.)
68
VIESMANN
OIL/GAS BOILERS
11
5822 426 GB
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