Viessmann FB2B Installation And Service Instructions Manual page 21

Electrical connections
Routing the connecting cables
!
Please note
Connecting cables will be damaged if they touch hot parts.
When routing and securing power cables on site, ensure that the maximum
permissible temperatures for these cables are not exceeded.
A Low voltage connections
B 230 V connections
C Internal extension
D Main PCB
Remove the existing cable grommet
when using larger cross-sections (up to
7 14 mm). Secure the cable with cable
grommet F (black) integrated into the
casing base.
(cont.)
E Communication module (accesso-
ries)
F Cable grommet for power cable
Installation sequence
21