Viessmann VITOTRONIC 100 Installation And Service Instructions Manual page 12

Type gc1 digital boiler control unit
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Heating system designs
System version 2
Required coding
02 : 2
Modulating burner operation
03 : 1
Oil fired operation (irreversible)
The temperature sensor on plug aJA controls the mixers of
0d : 1
downstream heating circuits
Automatic changeover
00 : 2
With DHW cylinder
Connecting temperature sensor T1 to plug aJA
4A: 1
Connecting temperature sensor T2 to plug aJB
4b : 1
*1
If required.
12
(cont.)
*1
*1

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