13
220683B
4.3 Flue Preparation
All flue assemblies are designed for initial installation,
given that there is sufficient clearance opposite to the
flue for the installation of the flue.
If there is insufficient clearance the flue can be installed
externally from outside.
For a wall thickness up to 300mm provided there is
sufficient space available, the flue can be fully installed
from the inside.
For a wall thickness of over 300mm the external flue
hole will need to be made good from the outside.
4.4 Rear and Side Flue Application
Select the boiler location and flue application, with due
regard to the terminal position.
Take the template from the boiler pack and temporarily
position it on the wall, making sure that the minimum
clearances are maintained, see diagram 1.2.
For a rear flue mark the position of the flue as
diagram 4.4.
For a side flue, extend the centre line horizontally left or
right to the corner adjacent surface where the flue is
required to exit to outside. Mark the position of the
centre of the flue and boiler, see diagram 4.4.
4.5 Flue Hole Cutting
Having marked out the flue centre cut a hole for the flue
using, preferably, a 115mm minimum core drill.
4.6 Wall Sleeve
If the wall thickness “Q” is less than 300mm cut the wall
sleeve to the required length, see diagram 4.5.
Fit the wall sleeve.
Make good around the wall sleeve at both internal and
external wall faces, through the wall sleeve if internal
access only is available.
If the wall thickness “Q” is greater than 300mm the wall
sleeve must be fitted flush with the INSIDE wall face.
If the inner end of the sleeve sticks out into the cavity
then, if desired, the wall sleeve can be trimmed back to
the depth of the inner skin of brickwork. Make good at
the internal wall face but leave the external wall face
until the flue has been fitted.
Diagram 4.4
SIDE FLUE
REAR FLUE
75mm
115mm
MINIMUM
HOLE
0098M
BOILER
CENTRE LINE
FLUE
CENTRE LINE
14mm
300mm
MAX LENGTH
Q
Q
Diagram 4.5
4443
4 F l u e a n d A p p l i a n c e P r e p a r a t i o n
WALL
SLEEVE
