Viessmann VITODENS 100-W Installation And Service Instructions Manual page 14

Installation sequence
Fitting the boiler and making connections
Filling the siphon with water
Balanced flue connection
14
(cont.)
Fill a minimum of 0.3 l of water into the
flue outlet.
!
Please note
At commissioning, flue gas may
be emitted from the condensate
drain.
Fill the siphon with water before
commissioning.
Connect the balanced flue.
During installation and positioning of the
flue system, observe Part L and
BS 5440 building regulations.
Flue system installation instruc-
tions.