Viessmann VITODENS 343-F WS4A Installation And Service Instructions Manual page 13

Preparing the installation of the compact boiler
On-site connections at the connection panel (accessory)
A Solar flow
B Heating flow
C Cold water
D DHW circulation
E DHW
F Heating return
G Solar return
Connection panel installation
instructions.
Preparing for installation
(cont.)
Installation position, see page 8.
All connections R ¾"
p
13