10
EN
G
LISH
Existing chimneys: Existing masonry chimneys should be lined with flexible stainless steel liner and the liner should be
insulated. All connections must be appropriately sealed.
Existing chimneys must be inspected, be clear of obstruction and have been swept clean immediately before installation
of the lining system.
No shared chimneys: Each appliance must connect to its own flue. No other appliance must connect to the same flue or
chimney. No other pipes or conduits must pass through the chimney or flue.
Sealed joins and connections: The appliance works with the combustion chamber in negative pressure and the flue pipe
under positive pressure; it is essential that all joints and flue and chimney connections are sealed. Single skin and twin
wall flue pipe should incorporate silicone seals at each joint. Other connections should be sealed with a suitable sealant
(for example high temperature silicone). All seals must be able to withstand 250ºC or more.
Suitable materials: Flue and chimney products used, including fixings and components, must be made of suitable, non-
combustible materials conforming to the applicable regulations.
Aluminium and fibre cement pipes are forbidden.
Orientation and initial vertical rise: The flue system should run as vertically as possible as any deviations off the vertical
can adversely affect the draw. 45º is the maximum off-vertical angle than may be used. Non-vertical sections should
make up no more than ¼ of the effective height of the flue or chimney (measured from the appliance outlet to the top of
the chimney), and must not be longer than 2,000 mm.
There should be no more than 4 bends in the system, with a tee counting as 2 bends.
Securely fix and support the system to avoid vibration and movement.
90º bends should not be used. When using the rear outlet on the appliance a 90º tee should be used with sweeping
access and debris collection space.
When using the rear outlet any horizontal run should not exceed 150mm, including the arm of the tee.
An initial vertical run of 600mm from the appliance is recommended before any change in direction.
Cleaning Access: The system must provide access so that the entire system can be swept and cleaned.
Flue pipes must not pass through rooms in which the installation of combustion devices is prohibited.
IT IS STRICTLY FORBIDDEN TO INSTALL FLUE DAMPERS/BUTTERFLY VALVES.
Heat shielding: If combustible materials are present then minimum separation distances will need to be adhered or heat
shielding will be required. Please refer to Building Regulations Approved Document J, and also these installation
instructions.
Summary of Contents for DEA ECO 12
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