Viessmann Vitocal 300-G Installation And Service Instructions Manual page 71

Electrical connections
Connecting electrical connecting cables from the heat pump
stage 2 (type BWS 301.A) to heat pump stage 1 (type BW 301.A)
aVG
aJ B
A
D
4.
[G
X
(cont.)
B
C
1.
B C
< 42 V
230 V~
aVG
[H
X
aVG
BC
3.
Installation sequence
2.
BC
< 42 V
230 V~
5.
aBH
[C-Ö
X
71