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2. If L is within the range 127mm to 350mm then the flue can
be telescopically adjusted to the correct length (
L+184mm for
side flues or
L+181mm for rear flues). The ducts are then fixed
by drilling a pilot hole through the hole in the air duct and screwing
the self tapping screw provided into the two ducts (See Fig. 16).
3. If L is within any of the following ranges it will not be
necessary to cut the extension ducts:
0.88m to 1.10m, 1.63m to 1.85m or 2.38m to 2.50m.
Each extension must be connected to the first section of flue or
the previous extension by firstly fitting the inner flue ducts
together and pilot drilling and fixing. (See Fig. 17). Then the outer
air ducts can be similarly fixed using the pair of screws provided.
The flue terminal section can then be telescopically adjusted and
fixed as before (See Fig. 16) ensuring the correct length
(
L+184mm for side flues or L+181mm for rear flues).
4. In the event of L not falling within any of the above ranges
it will be necessary to cut the FIRST extension length. The air
and flue duct lengths should both be reduced to the same
length: L – 240mm where one extension is used; L – 990mm with
two extensions and
L – 1,740mm with three. (See Fig. 17). The flue
can then be assembled ensuring that the cut extension is fitted to
the turret duct assembly first and that the flue is adjusted to the
correct length of (
L+184mm for side flues or
L+181mm for rear flues) (See Fig. 16).
5. Finishing the flue
Apply the plastic tape provided to the last section of flue where it
will be sealed to the external brickwork.
From inside, push the assembly through the wall, align the flue
turret with the socket on the appliance, push the turret down to fully
engage it and clamp in place with the turret clamping ring. See Fig.
18.
Make good the internal and external brickwork or rendering.
Refit the fan and replace the inner casing cover.
13
Fig. 17. Extensions.
Fig. 18. Flue turret fixing.
Reset button
Flue Gas
Test Point
Flue turret
Turret clamping
ring
Rear flue L + 181mm
Side flue L + 184mm
Appliance casing
Fixing screws Fixing screw
Turret
assembly
Terminal
assembly
L = 450mm-2500mm
Extensions of equal length
Shorten first extension fitted
to the turret assembly
Fig. 16. Standard flue assembly.
Appliance casing
Fixing screw
Turret
assembly
Terminal
assembly
Rear flue
L + 181mm
Side flue L + 184mm
L