41
PA
RT
2 CONCENTRIC 80/125
INSTALLATION OF THE HORIZONTAL AIR/FLUE DUCT AND TERMINAL
ACCESSORY (80/125)
Fitting extensions
• Install the flue extensions by
working from the installed air/flue
and terminal accessory back
towards the boiler.
• The joints between the flue duct
sections are made by pushing the
flue duct spigot into the socket of
the flue duct extension by 30 mm.
This is achieved when the gap
between the air duct sections is
10 mm.
• All sockets should point towards
the flue terminal.
• The joints between the air duct
sections should be clamped using
the air duct clamps.
• Ensure that the air duct clamps
are positioned centrally.
• Drill two 3 mm diameter holes
through the air duct (ensure that
the drill does not pierce the inner
flue duct). Fix the duct using the
screws provided.
• Ensure that the flue assembly is
adequately supported along its
entire length.
• Cut any air/flue ducts to the
required length as detailed on
page 45.
Connect the flue
assembly to the adaptor
• Slide the 125 mm dia x 88 mm
long air duct clamp over the air
duct.
• Fit the 87° elbow to the last flue
extension.
• Line up the elbow with the
adaptor and insert the spigot of
the elbow in to the adaptor.
• Locate the air duct clamps
ensuring they are positioned
centrally.
• Drill two holes 3mm Ø through
the air duct through both the air
duct clamps at the most
convienient holes on the air duct
clamps. (Ensure that the drill does
not penetrate the inner flue duct).
Screw the clamps to the air ducts
of the flue assembly, the elbow
and boiler using the sheet metal
screws supplied.
• Slide the internal trim ring back to
the wall, securing in position with
a small amount of sealant if
required.
