Viessmann Vitocal 300-G Installation And Service Instructions Manual page 23

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Primary circuit, type BW 301.A + BWS 301.A...
211.1
X1.
X2.N
X3.9
X1.
X3.8
2
224.2
F2
F3
Preparing for installation
(cont.)
200 W
M
UP
1~
230 V; 0.15 A
12
PT500
13
PT500
15
21
16
17
23

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