Viessmann Vitodens 050-W Installation And Service Instructions Manual page 16

Installation sequence
Mounting the boiler and making connections
Filling the trap with water
Balanced flue connection
Do not carry out commissioning until
the following conditions are met:
■ Free passage through the flue gas
pipes.
■ Flue system with positive pressure is
gas-tight.
■ Apertures for ensuring sufficient com-
bustion air supply are open and cannot
be closed off.
■ Applicable regulations on installing
and commissioning flue systems have
been followed.
16
(cont.)
Pour at least 0.3 l of water into the flue
outlet.
!
Please note
During commissioning, flue gas
may escape from the condensate
drain.
Always fill the trap with water
before commissioning.
Connect the balanced flue.
Flue system installation instruc-
tions
Danger
Leaking or blocked flue systems
or an insufficient supply of com-
bustion air cause life threatening
poisoning due to carbon monox-
ide in the flue gas.
Ensure the flue system functions
correctly. Apertures for combus-
tion air supply must not be able to
be closed off.