Viessmann FB2B Installation And Service Instructions Manual page 13

Installing the boiler
Connections on the solar side
A
B
A
Shown with connection sets for finished walls (accessories)
A Solar return R ¾ or Ø22 mm smooth
tube
Note
The solar circuit pump is integrated into
the boiler.
The expansion vessel, available as an
accessory, is installed in the solar
return.
Separate installation instructions
(cont.)
B
B Solar flow R ¾ or Ø22 mm smooth
tube
The solar safety valve can be fitted in the
boiler. Set the pressure gauge for the
solar circuit on site.
Note
Route the blow-off pipe for the safety
valve on the solar side into a suitable and
adequately sized drip container. A drip
container (2.5 litres) to be fitted in the
boiler is available as an accessory.
Installation sequence
A
B
13