31
PA
R
T 2 CONCENTRIC 80/125
IMPORTANT:
The flue hole should be cut with a
slight rise to outside of 3° ± 1°
(equivalent to 50 mm ± 20 mm rise
per metre length).
Side flue installations
• For installations where the air/flue
duct is to be installed to the side,
the position of the flue exit hole
can be determined as follows:
• Identify the correct measurement
as shown in fig. 3.2, carefully
measure the distance from the
bottom centre of the boiler
hanging bracket (centreline of the
two lower hanging bracket fixing
holes). This gives the position of
the centreline of the 127 mm flue
elbow and adaptor when
installed.
• The position of the flue exit hole
can be determined by carefully
levelling across the wall from this
mark.
• The position of the flue exit hole
should allow the flue to be
installed with an upwards slope
towards the terminal of
approximately 3° ± 1°, equivalent
to 50 mm ± 20 mm rise per metre
of flue length. Calculate the
required rise according to the flue
length and mark the position of
the flue exithole.
Note: Due to the long lengths of flue
possible and the slope required, it
may be necessary to adjust the
location of the boiler installation
template. Please check that both the
boiler installation site and flue
termination are in accordance with
these instructions prior to drilling any
holes for the boiler hanging bracket.
• Once the position of the flue exit
hole has been determined, the
hole should be cut through the
wall using a core drill of 127 mm
diameter. The flue exit hole should
be cut with a rise towards outside
of 3°.
• Measure the distance from the
outside face of the wall to the
centre of the fan outlet on the
boiler (fig. 4.5).
This is dimension A.
• For installations where the
measured distance dimension A
(fig. 6) is greater than 960 mm,
an air/flue extension accessory
will be required. The number of
air/flue duct extensions which can
be used depends on the boiler.
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.
• Fix the paper template, supplied
with the boiler, to the wall
ensuring that the centreline of the
template is vertical using a
plumbline or spirit level.
1
2
*
* = 190 mm
Fig. 4.3
LAS Euro B/S 077/1
253
Fig. 4.4
LAS Euro B/S 083/1
INSTALLATION OF THE HORIZONTAL AIR/FLUE DUCT Ø 80/125 WITH
EXTENSIONS
*
= 190 mm ecoMAX combination and system boilers
*
= 176 mm ecoMAX pro
*
*
= 253 mm ecoMAX
combination and system boilers
*
= 210 mm ecoMAX pro
(from top holes on bracket)
