Viessmann Vitocal 300-G Installation And Service Instructions Manual page 67

Inserting cables/leads
A Entry for LV cables < 42 V~ (e.g.
KM BUS, sensors, remote control)
with onward routing to PCB 3.
B Cable entries for 230 V~ with
onward routing to PCB 1 and 2.
(cont.)
C Secure and bundle cables/leads
(separating LV <42 V~ and
230 V~), so that they cannot shift
in relation to each other.
D PCB 1 (cross connect circuit
board LP1)
E PCB 2 (main PCB LP2)
F PCB 3 (sensor PCB LP3)
Installation sequence
67