Viessmann VITOCAL 300-G Installation And Service Instructions Manual page 101

Electrical connections
2
A
aVG
1
X3.10
X3.11
L
223.1
223.2
223.1
223.2
223.1
223.2
N L1
A Heat pump 1 (lead appliance)
B KM BUS
C External extension H1
D Zero volt contact "External
demand"
(cont.)
C
3
2
B
1
aVG
N
D
230V
?
L
sA
L
?
N
E
fÖ
N
F
230V
?
L
sK
G
N
H
230V
?
L
sÖ
K
E Lag heat pump 1
F Zero volt contact "External
Installation sequence
L1
?
N
Connection at the contact for "Exter-
nal demand"
demand"
101