Viessmann VITOCAL 300-G PRO Installation And Service Instructions Manual page 47

Hydraulically connecting the primary/secondary...
Use of the Victaulic 2½" or 3" flange adaptor set (accessory)
220
D C
300
A Victaulic 2½" (secondary circuit) or
3" (primary circuit) couplings
B Adapter nipple with flange DN80/
PN10, without anti-vibration ele-
ments
B A
Installation sequence
C Anti-vibration compensators, on
site
D Hydraulic line fixings
(cont.)
47