Viessmann VITODENS 242-F Installation And Service Instructions Manual page 24

Installation sequence
Installing the boiler
Connections on the solar side
A
B
A
Shown with connection sets for finished walls (accessories)
A Solar return R¾ or Ø 22 mm,
smooth pipe
Note
■ The following components are instal-
led inside the appliance at the factory:
■ Circulation pump for the solar circuit.
■ Expansion vessel in the solar return.
■ Safety valve on the solar side.
Install the pressure gauge for the solar
circuit on site.
24
(cont.)
B Solar flow R¾ or Ø 22 mm, smooth
B
A
B
pipe