26
Fitting extensions
• Measure and note the length of
the air duct extension required for
the installation.
Use this measurement to calculate the
length to cut the air and flue ducts:
Length of Air duct
• Cut the length of the air duct as
follows:
Length of air duct as shown in Fig.
6.1
Note: Minimum length of air duct is
100 mm.
Length of Flue duct
• Cut the length of the flue duct as
follows:
Length of flue duct =
Length of air duct + 40 mm
• Cut the air and flue ducts square
and and remove any burrs. Care
should be taken not to scratch the
white surface on the air duct.
• After cutting the tubes to size,
insert the flue duct into the air duct
and secure the air duct to the
spacing bracket through the three
pre-drilled holes.
• Lubricate the seals and install the
flue extension.
• Ensure that the air duct clamps are
centrally positioned over the
10 mm gap between the air duct
sections.
• Drill two holes 3 mm Ø through
each air duct (at either end of
each clamp) at the most
convienient holes in the air duct
clamps and secure with screws
provided. (Ensure that the drill
does not penetrate the inner flue
duct).
• Screw the clamp to the air ducts of
the flue assembly and the boiler
using the sheet metal screws
supplied.
10 mm
Length of air duct
10 mm
Fig. 6.1
LAS Euro B/S 081/0
FITTING AIR/DUCT EXTENSIONS
