Atmos Energy HE26 - Manual (Page 24)

Note regarding internal air-flue systems.
It is recommended that the boiler is sited on or next to an external wall so as to
negate the need to use a void or enclosure as a route for the flue system. Where
this is not possible the following applies:
CORGI have issued a Guidance Document on the safe installation of flue
systems within a dwelling. This is a Technical Bulletin reference TB200, and can
be downloaded from the internet. In brief this requires the air-flue system to be
*accessible for visual inspection* by a service engineer. Particular concern
focuses on the joints, supports, material and correct slope of the flue installation,
which should all be in accord with the instructions given in this document and with
good practice. We recommend that the guidance given in this document is
adhered to, especially in the case of twin pipe flue systems.
5.5 Flue discharge and air supply
A number of different flue systems are available from Atmos for use with this
appliance:-
• 60/100mm concentric system, comprising a standard through the wall flue
kit or an extended system.
• 80/125mm concentric system.
• 80mm twin pipe system which enables separate air intake and flue pipes to
be fitted to the appliance.
• 80mm PPS and 50mm Mupvc plastic twin pipe system for special
applications.
Maximum lengths are specified in § 5.6.4 to 5.6.7, and must not be exceeded.
Other special flue arrangements covering Prefabricated Chimneys and Multi
Storey flue systems are included in § 5.7 to 5.9.
5.5.1 60/100mm Concentric Standard through the wall Horizontal
Terminal
IMPORTANT!
Using the concentric adapter set (see photo), the standard two-pipe
connection can be changed into a concentric connection.
1. Seal the open air supply connections in the appliance with the sealing
cap delivered with the set (item C in photo).
2. Remove the sealing ring around the flue discharge in the appliance, as
shown below.
3. In its place, fit the sealing ring ø 116 x 110 mm (item B in photo).
4. Fit the adapter (item A in photo) on the flue discharge.
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