Viessmann VITOCAL 300-G PRO Installation And Service Instructions Manual page 21

Siting
(cont.)
Requirements for on-site connections
Dimensions type BW 301.A090 to BW 302.A250:
Type BW 301.A090, BW 301.A120, BW 302.A090, BW 302.A120
G F E
A
B
C
D
163
406
A Primary circuit brine inlet:
Victaulic 3"
B Secondary circuit flow:
Victaulic 2½"
C Primary circuit brine outlet:
Victaulic 3"
343
Preparing for installation
1343
D Secondary circuit return:
Victaulic 2½"
E Power supply 400 V/50 Hz
F Power supply 230 V/50 Hz
G Low voltage < 42 V
21