Viessmann Vitocal 300-G Installation And Service Instructions Manual page 47

System version 3 (type BW/WW)
Electrical connection
LP PCB (see page 63)
*1
For detailed information regarding the power supply, see from page 68.
(cont.)
*
1
A On-site contactor relay
B Place jumper from X3.1 (LP1) to
X7.1 (LP2)
Preparing for installation
47