KAL-FIRE Fera series Installation And Operating Instructions Manual - page 5
9
1.2.2
Roofduct
•
It is not necessary
to use both ceiling
support and roof
bracket. This is
just an example.
•
The Rain cap
(storm collar,
KF2CRR100) is
only necessary
when the roof duct
is extended.
KF2CDD100KLTV
KF2CRR100
KF2CDP1000530
Roofplate 5°-30°
KF2CLS100010
Roofplate 0°-10°
KF2CLS1002045
Roofflashing 20°-45°
KF2CLS1004560
Roofflashing 45°-60°
KF2CBO1000045
KF2CSC100300
Adjustable pipe
KF2CVO100
Ceiling support
KF2CEL1001000
KF2CDB100
Roof bracket
KF2CEL100500
10
1.2.3
Roofduct for existing flue.
You can convert your existing flue to a balanced flue system by using
two connectors. On top of the chimney you can use the Ventilation
plate with pull-on hood (
KF2CAFDkap100LTV
)
.
A flexible flue can be installed in the chimney.
The flexible flue is for the outlet fumes and
the rest of the chimney is for the inlet of the
combustion air. Always check the existing
chimney on leakage otherwise the balanced
flue system won’t work. If the existing
chimney is in a bad condition we prefer to
use two flexible flues. The outer flue is for the
inlet air and the inner flue is for the outlet
fumes.
At the bottom of the chimney you have to
use an other connector (
KF2CSAFPL1050
) to
create a good fit with the Kal-Fire concentric
flue.
1.3
System calculation
The following rules of thumb can be used for calculating the flue.
These calculation principles apply to both wall and roof ducts. Any
failure to adhere to these calculation principles will invalidate the
Fera’s warranty. If a large number of bends are used, and too much of
the flue is mounted horizontally, then considerable resistance is
created in the flue. This makes it difficult for the combustion air to
reach the appliance, which has a considerable effect on the flames. In
order to create a good draught in the duct, it is always necessary to
begin by:
•
fitting a 0,7-1 m pipe vertically to the appliance.