Viessmann Vitocal 222-G User Manual page 221

Vitocal 300-A/350-A
L1
L2
L3
N
ID: 4605058_1304_05
On-site wiring for external heat source demand plus DHW heating using the Vitotronic boiler control unit as an example. Match the
hook-up according to the installed boiler control unit.
2
222.3
X3.1
222.4
X1.
X2.N
51
ON
TR/ON
TR
150
STB
N
STB
N
21
L1
N
28
L1
3
5 2
1
3
1 2
1
ID: 4605058_1304_05
7
Insert jumper from 1X3.1 to 222.3
VIESMANN
226
(cont.)
16 A
L1
16 A
L2
16 A
L3
400 V, 50 Hz
N
55
STB
K1
13
A1
A2 14
56
M
UPSB
1~
M
ZP
1~
STS
ATS
K2
13
A1
A2
14
57
52
37
32
58
System examples