Viessmann VITOCAL 300-G Installation And Service Instructions Manual page 35

Primary circuit, type WW + WWS (two-stage...
Connecting the sensors and limiters
2
X3.3
X1.
?
X3.4
X3.8
X1.
?
X3.9
[G
X
[G
X
With a common primary pump
Note
If types WW and WWS are installed with
different rated outputs, the different flow
rates mean that two primary pumps must
be used (see page 31).
230 V; 2 mA
´
230 V; 0.15 A wQ
P
230 V; 0.15 A qO
Pt 500
12
Pt 500
13
Preparing for installation
(cont.)
wE
qZ
qU
35