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Diagram 9.7
12929
Diagram 9.8
12977
Diagram 9.9
14474
9 Telescopic Flue - Length, Preparation and Installation
9.5 Flue Fitting
With the air duct seams aligned and the flue set to the
required length ‘Y’, mark the securing hole position in the air
duct. Drill a 3mm diameter hole at this position, take care not
to pierce the inner flue duct. Secure with screw provided and
tape the joint, see diagram 9.7.
Fit the sealing collar onto the locating ring on the flue terminal,
see diagram 9.8.
With the flue elbow removed, push the flue assembly into
the wall, externally or internally, until the end of the assembly
protrudes a short way from the inside face of the wall. This
will enable the internal trim ring (if required) to be positioned
and allow the flue assembly to be drawn back up to the flue
elbow.
Secure the flue elbow in position on top of the boiler with the
four screws supplied.
Draw the flue assembly from wall and engage the flue duct
into the elbow and butt fit between the air duct and flue elbow.
Check the correct alignment of the flue.
Fit the securing collar in position, mark through two of the pre
drilled holes in the securing collar. Remove securing collar
and drill two 3mm diameter holes one in the elbow and one in
the air duct, take care not to pierce the inner flue duct. Fit the
securing collar and secure with screws provided, see diagram
9.9.
Slide the internal trim ring back against the wall, securing in
place with a small amount of sealant if required.
The cut ducts must be de-burred and all filings and debris
removed.
Insert the flue duct into the air duct terminal assembly,
remembering to engage the catch within the terminal.
NOTE
: If the seals require lubricant to ease installation, do not
use mineral oils or grease, water is recommended.