Viessmann Vitocal 300-G Installation And Service Instructions Manual page 64

Installation sequence
Overview of power connections
PCB 1 (cross connect circuit board LP1)
The terminals of PCB 1 (message and
safety components) are designated
as follows:
Example: Terminal 1X1.?
1 PCB 1 (LP1)
X1. Terminal strip 1
? Any earth terminal
64
(cont.)
Example: Terminal 1X2.N
1 PCB 1 (LP1)
X2. Terminal strip 2
N Any neutral conductor terminal
Example: Terminal 1X3.5
1 PCB 1 (LP1)
X3. Terminal strip 3
5 Terminal 5