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9.15 Vertical fl ue
The vertical fl ue system is available as an option where the
boiler position does not permit the use of the top horizontal or
rear fl ue system.
The system is made up of accessories. The accessories include
terminal assembly, bends 45° and 90°, fl ue extensions, fi xing
bracket and appropriate weather collar, see diagram 9.17.
The maximum permitted straight fl ue length is 8 metres plus
the terminal. for each 90° or 2x45° bends fi tted, the maximum
length must be reduced by 1 metre, see diagram 9.22.
NOTE: 2x45º bends can replace 1x90° bend if necessary.
When using 90º bends any horizontal extension pipe should
be inclined by a minimum of 44mm/metre (2.5°) towards the
boiler to facilitate condense removal, see (a) in diagram 9.22.
Alternatively use 45º bends to avoid horizontal runs, see (b) in
diagram 9.22.
The terminal should be positioned at least 600mm from any
opening into the building, refer to diagram 3.2.
Measure the distance of fl ue length required for the installa-
tion.
The fl ue must be designed with a continuous fall towards the
boiler.
Remove the top fl ue outlet cover secured with four screws, see
diagram 9.2.
Refer to diagram 9.18. Secure the fl ue adapter in position on
top of the boiler with four torx headed screws supplied, mak-
ing sure the nib fi ts into the locating slot in the boiler casing to
ensure correct orientation.
The rubber ‘O’ rings of each section should be lubricated prior
to assembly.
NOTE: Do not use mineral oils or grease, silicon grease or
water is recommended.
Secure the fi rst extension pipe to the fl ue adapter with the se-
curing collar supplied by positioning the collar centrally over
the joint, then tighten the two screws on the securing collar,
see diagram 9.19.
Fit more extension pipes as required using the collar and
screws supplied with each extension pipe. To fi t position the
collar centrally over the joint, tighten the two screws on the
securing collar. Using the holes provided in the securing collar
drill and insert the two self tapping srews supplied, see dia-
gram 9.20.
The rubber ‘O’ rings of each section should be lubricated prior
to assembly.
NOTE: Do not use mineral oils or grease, silicon grease or
water is recommended.
When building the fl ue up it is recommended that it is sup-
ported every 2 metres and at every bend by a fi xing bracket.
Project the rise of the fl ue pipe to roof level and cut a 150mm
hole in the roof.
12969
Diagram 9.17
9 Flue Preparation and Installation
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