Viessmann Vitocal 300-G Installation And Service Instructions For Contractors page 22

Preparing for installation
Primary circuit, type BW + BWS (two-stage)
Electrical installation scheme
Overview of electrical connections and
details regarding the PCBs, see from
page 67 and the separate service
instructions, Vitotronic 200 heat pump
control unit.
sYYA
X1.
?
X2.N
X3.9
X1.
?
X3.8
22
2
.
sXVS .
P
12
[G
X
13
[G
X
(cont.)
200 W
M
UP
1~
230 V; 0.15 A wQ
Pt 500
Pt 500
qT
qZ
qU