Balanced Flue Connection - Viessmann VITODENS 111-W Installation And Service Instructions Manual

Installation sequence
Mounting the boiler and making connections
Fig. 9

Balanced flue connection

Fig. 10
Connect the balanced flue pipe.
During installation and positioning of the flue system,
observe Building Regulations Part L and BS 5440.
Flue system installation instructions
Connecting several Vitodens 111-W to a shared
flue system
Adjust the burner settings of each connected boiler to
match the flue system:
■ For shared connection, see page 26.
Note
The back draught safety device available as an acces-
sory must be installed on every boiler.
14
(cont.)
Pour at least 0.3 l of water into the flue gas connection.
!
Please note
Water in the ventilation air supply can be detri-
mental to the combustion quality.
Never pour water into the external ventilation air
aperture.
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.
■ Inspection port covers checked for secure and tight
seating.
Apertures for ensuring sufficient combustion air sup-
■
ply are open and cannot be closed off.
Applicable regulations on installing and commission-
■
ing flue systems have been followed.
Danger
Leaking or blocked flue systems or an insuffi-
cient supply of combustion air cause life threat-
ening poisoning due to carbon monoxide in the
flue gas.
Ensure the flue system functions correctly. Aper-
tures for combustion air supply must not be able
to be closed off.
Prevent condensate drainage via a wind protec-
tor.