Viessmann Vitocal 300-G Installation And Service Instructions For Contractors page 25

Primary circuit, type WW + BWS (two-stage)
Well pump on-site connection 230 V
sYYA .
X1.
?
X2.N
X1.
?
X2.N
X3.1
X2.N
2
sXVS
.
Preparing for installation
(cont.)
L1 ? N
K1 K2
K3
200 W
M
UP
qT
1~
200 W
M
UP
wT
1~
M
1~
UP
wZ
25