Vaillant ecoTEC plus 612 Instructions For Installation And Servicing page 108

INSTALLATION OF THE VERTICAL AIR/FLUE DUCT
Observe the maximum flue
lengths as detailed in table on
page 42.
52
Supplied By www.heating spares.co Tel. 0161 620 6677
Fig. 5.1: Vertical roof duct
Vertical air/flue duct
Accy. No.: 303 200 (black)
Contents of the accessory:
• Vertical air/flue duct and terminal
assembly
• Adapter (air) for Ø 110/125
• 70 mm air duct clamp
• Fixing bracket
See page 41 et seq. for details of
air/flue duct elements.
The air/flue duct assembly may be
connected directly to the flue outlet
on top of the boiler.
In addition to the vertical air/flue
duct and terminal accessory, air/flue
duct extensions can be added to
increase the length of the flue.
Preparation
• Determine the installation site for
the boiler with reference to the
installation and servicing
instructions supplied with the
boiler.
• Ensure that all installation and
service clearances are available
and that the boiler flue can be
installed as detailed in these
instructions.
• Determine the point where the
vertical air/flue duct and terminal
assembly will penetrate the roof.
Please note: The vertical air/flue
duct and terminal accessory (Accy.
No. 303 200) may be shortened.
The outer 'white' duct should be
shortened first, then the inner flue
duct cut so that it protrudes 15 mm
out of the air duct. In case of
installation directly to the boiler
without elbows or bends, it is
essential that the roof tile/collar is
vertically aligned with the air/flue
duct of the boiler.