Installation Manual

16
5350 485 GB 08/2007
Flue system
Flue gas temperature protection
The flue pipes are approved for flue
gas temperatures up to 120 ºC. The interior
design of Viessmann condensing boilers
ensures that the maximum permissible flue
gas temperature will not be exceeded.
Concentric Horizontal Flue System
Standard horizontal flue kit: The appliance
can be supplied complete with a standard
concentric horizontal balanced flue kit and
factory fitted flue terminal assembly,
suitable for flue lengths of up to 620mm
from the centre of the flue outlet, which
equates to wall thicknesses of up to
480mm for rear flues and 463mm for side
flues including minimum clearances.
Extension flue ducts can be used to
increase the straight flue length up to 6m
and include one 87º elbow.
Installation notes
• Keep the flue gas path as short as
possible and with the smallest possible
number of bends.
• Check the seating of the gaskets in all
couplings.
• Only use the special gaskets supplied.
• Only use the components supplied with
the PP flue gas system.
• Slide the pipes into each other whilst
turning them slightly.
• An extra 87° elbow can be used but this
reduces the maximum permissible
length by 1m . An extra 45° elbow can
be used but this reduces the maximum
permissible length by 0.5m .
Combined length of flue pipe max 6m
A
Flue pipe (can be shortened as necessary)
B
Vitoden 200-W installation 4/9/07 7:27 pm Page 16