Vertical balanced flue assembly
(kit 2360)
Before starting, ensure the placement of each pipe
section has been identified (
fig 23
), and that all 'o'-rings
(
item 5
) are in position and are well lubricated. Any
white pipe exposed to the elements should be protected
with a suitable material. Place all weld seams to the
rear.
It may be useful to fully assemble the flue on the
ground before fitting to the boiler. Before assembly,
determine the length of flue required and if necessary
discard the midsections (
item 7
,
fig 23
). See
fig 25
for
flue dimensions; see adjacent for details of different
available flue lengths.
Having decided the position of the boiler, mark the
position of the terminal and cut a circular hole
175mm diameter in the ceiling and roof. Ensure the
flue will have a minimum clearance of 25mm from
any combustible material.
Remove the boiler top casing and the four nuts that
hold the flue socket and gasket to the top of the
heat exchanger. Remove the flue socket, but leave
the gasket in place.
Referring to
fig 23
, secure
items 1
,
2
,
3
&
4
in
order on to the top of the heat exchanger, using the
nuts previously removed.
Fit the lower flue section (
6
) to the spigot (
3
)
—now
situated on top of the heat exchanger
—and ensure
the hose connection is directed to the front.
Fit the first flue mid-section (
7
) to the lower flue
section, pushing firmly down until the outer
sections meet (but do not overlap). Use the
clamping strap (
11
) to secure the outer sections
together.
Fit the second flue mid-section (
7
) and the third
flue section (
8
) to the previous sections in the
same manner.
Note:
Both instances of
item 7
can be discarded if
they are not required. Of the main flue lengths, only
6
&
8
are mandatory.
Fit the terminal extension (
9
) over the preceding
flue section. This section does not make use of a
clamping strap to allow greater flue length
variation, the fit is telescopic. When the position
has been set, drill through the
outer pipes only
and secure with self-tapping screws.
If necessary, fit the terminal (
10
) to the terminal
extension before it is attached to the third flue
section (
8
). Push firmly down until the outer
sections meet and secure with the stainless steel
clamping strap (
12
).
Fit the ceiling plate’s (
13
) centrally over the hole in
the ceiling. Pack the space around the flue with a
suitable insulation.
Secure the flue in the roof space and fit waterproof
flashing (not supplied) around the flue at the
roofline.
Use the jubilee clip provided to secure the air hose
from the burner to the hose connection on the
lower flue section.
Remove the tabs from the cutout in the boiler top
casing and fit the casing in position around the flue.
Perform a final check of the flue. Ensure clamping
straps are located over all relevant flue joints.
Should the height of the flue (
fig 24
) not meet your
requirements, alternative heights can be achieved by
discarding and adding different lengths. The midsection
(
7
) can be discarded, or additional sections of pipe can
be purchased to meet more specific requirements.
Additional 45° elbows can be purchased to offset the
vertical flue run. See
page 26
for details.
For outputs 15
–26 kW, the total flue run must not
exceed 6000mm. For outputs 29
–36 kW, the total flue
run must not exceed 4000mm. Any 45° elbows
contribute 500mm each to the calculation.