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6.2 Flue Installation
WARNING
The gas removal ducts must not be in contact with
●
or near flammable materials and they must not pass
through any structures or walls of buildings made of
such materials.
If you replace the boiler, the old gas removal system
●
must be replaced by a new one.
For horizontal flue terminal through the wall must be
●
installed horizontal and level. The flue pipe inside the
terminal is fitted in a 3° to ensure the condensation water
can run back to the boiler.
For longer horizontal flue extensions, those flue sections
●
must always be fitted on an incline (52 mm/m = 3°)
sloping down towards the boiler so that no condensation
water is able to accumulate in the outlet system.
The Navien flue system used is a push fit flue system,
●
which does not require screws to be fitted at each flue
joint.
The flue system must be adequately supported at regular
●
intervals between brackets of no more than 1 m for
horizontal sections and no more than 2 m for vertical
sections.
The fume extraction connection depends on the type of
installation. Carefully follow the instructions given below:
Coaxial System
For coaxial flue adapter, fit the components as shown in the
figure:
50
Flue System
Adapter
When Installing the wall terminal horizontally through the wall,
see the following as shown in the figure:
1. A flue terminal weather seal (black) can be fitted on the
external flue terminal end.
2. Cut the hole for the flue ensuring the hole is horizontal and
level.
The horizontal flue length must be installer level as the flue
pipe inside the terminal is fitted in a 3° fall back to the boiler.
ø105 mm for terminal ø60/100 mm
ø130 mm for terminal ø80/120 mm
3. Install the flue horizontally through the wall.
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