Viessmann VITOCAL 300-G Installation And Service Instructions Manual page 28

Preparing for installation
Primary circuit, type BW + BWS (two-stage...
sYYA .
X1.
?
X2.N
X1.
?
X2.N
X3.9
X1.
?
X3.8
With a common primary pump
Note
If types BW and BWS are installed with
different rated outputs, the different flow
rates mean that two primary pumps must
be used (see page 27).
28
2
sXVS .
[G
X
[G
X
(cont.)
200 W
M
1~
200 W
M
1~
230 V; 0.15 A wQ
P
Pt 500
12
Pt 500
13
UP
qT
UP
wT
qZ
qU