Connection To External Air Intake; Installation To Flue; Usage And Operation; Introductory Remarks - Defro Home INTRA Series Operating Manual

Installation of the DGP system should be entrusted to a
specialized company, which will check heat demand for
the given area and will correctly design connection sys-
tem and arrangement of the individual parts.

5.4. CONNECTION TO EXTERNAL AIR INTAKE

Room, where the fireplace insert is installed, should be equipped
with an inflow of air in the minimum amount required for correct com-
bustion process and for room ventilation. This can be done by execut-
ing fixed vents in the wall directed to the outside or through independ-
ent or common ventilation ducts.
Picture 29. Connection of fireplace insert to external air intake.
The external wall near the stove should have through the opening,
protected with grille on the internal and external side, for this purpose.
Furthermore, the air intake should be:

directly connected with the room, where the fireplace insert
is to be installed,

protected with grille, metal net or suitable cover not restrict-
ing minimum cross-section,

located in a way preventing plugging it,

located with consideration of proper distances preventing
swirling of air (e.g. with respect to the windows).

5.5. INSTALLATION TO FLUE

Fireplace insert should be connected to the individual flue. Size of
chimney draught should equal:

minimum draught

medium, recommended draught − 12 ± 2 Pa,

maximum draught
During execution of opening for flue gas discharge pipe you should
consider the possible occurrence of inflammable materials. If the open-
ing will pass through the wooden wall or wall made of material sensitive
to heat then you should obligatory maintain minimum distance from
flammable material (value given on the certification label of the pipe),
with possible additional insulation using proper materials (thickness 1.3
- 5 cm, heat conductivity min. 0.07 W/m °K).
As an alternative is it is recommended to use an insulated indus-
trial pipe, which can be also used outdoors, to avoid the occurrence of
condensate.
For correct operation connector between the fireplace insert and
flue or smoke duct should be executed acc. to the below recommenda-
tions:

horizontal sections should have a minimum slope of 3% to-
wards the top,

length of the horizontal section should be minimum and
should not exceed 2/3 metre,

a number of changes of directions, inclusive of use of the
"T" component, should not exceed 4.
Chimney or individual smoke duct should meet the following require-
ments:

be resistant to combustion products, water-proof and suitably
insulated, in compliance with conditions of use,
16
− 6 ± 1 Pa,
− 15 ± 2 Pa.

be made of materials resistant to normal mechanical
stresses, heat, the action of combustion products and possi-
ble condensate,

be vertical with a change of axis direction not exceeding 45°,

be adequately separated with void space or suitable insula-
tion from combusted and inflammable materials,

have preferably circular internal cross-section: square or rec-
tangular cross-section should have rounded corners with a
radius not smaller than 20 mm,

internal cross-section should be constant, free and independ-
ent,

have a rectangular cross-section with the maximum ratio be-
tween two sides equal to 1.5.
cleaning hole
Picture 30. Connection of fireplace insert to flue.
It is forbidden to use mechanical exhaust ventilation.
The fireplace insert should not be used if the chimney
draught is too low.

6. USAGE AND OPERATION

6.1. INTRODUCTORY REMARKS

Prior to installation of the fireplace insert you should make several
test fire ups. During test firing up you should check the operation of the
chimney damper and the other mechanical systems of the equipment.
During the initial period after installation the fireplace insert should
be operated with power equal to approx. 30% of rated power and in-
crease temperature gradually. It allows gradual removal of internal
stresses preventing the occurrence of thermal shocks. Furthermore,
such a method of operation improves the durability of the insert.
The fireplace insert is subject to expansion and shrinkage during
warming and cooling down stage what may cause slight squeaks. This
is an absolutely normal phenomenon because a structure of the fire-
place is made rolled steel and this phenomenon shall not be considered
as a defect.
Do not stay near the stove during several first fire ups. It is also
required to vent the room. Smoke, the odour of paint, silicone and other
materials used for execution of the installation will disappear after sev-
eral fire ups. However, we remind that they are not harmful to health.
It is good practice to ensure efficient ventilation during
first firing-up because a small amount of smoke and
odour or paint and other materials will be emitted from
the fireplace insert.
No to use non-installed fireplace insert. Test firing up is
an exception.
flue
non-flammable
material
mortar
rosette
diameter
of connection
with flue