9
kg. If this condition is fulfilled the dry stove manufactured by DEFRO
can be installed without needing to reinforce the floor slab.
Nonetheless, if you are not sure about design of floor slab, where
the stove is to be installed, you should absolutely contact with building
designer to reinforce the floor slab or execute special structure distrib-
uting the weight on larger area.
Flooring in the room, where the dry stove is to be in-
stalled, should be properly dimensioned, to maintain
the load.
To ensure correct operation of dry stove you should ensure suita-
ble inflow of air required for combustion (it is appropriate to ensure ap-
prox. 40 m
3
/h) in accordance with the installation standards and stand-
ards applicable in the given country. Volume of the surrounding envi-
ronment should not be less than 30 m
3
. You should assume that com-
bustion of 1 kg of pellet requires ~8 m
3
of air.
Air should be supplied through fixed openings of minimum 100 cm
2
cross section made in the walls (near the stove) and directed to outside.
These openings should be made in a way ensuring that they cannot be
plugged.
Active area of the grille should be selected correspondingly to
power of the stove. It is assumed that is should equal to 40 - 60 cm
2
per 1 kW of power of the dry stove. Recommended active surfaces:
equipment power to 10 kW - grille cross-section min. 500
cm
2
,
equipment power to 15 kW - grille cross-section min. 700
cm
2
,
equipment power over 15 kW - grille cross-section min. 800-
1200 cm
2
and more.
Air can be supplied from adjacent rooms, provided that they are
equipped with external air supply and they are not intended for a bed-
room and bathroom, and where fire hazard is not present, for example:
garages, woodsheds, inflammable materials storage. You should ab-
solutely observe recommendations of the applicable standards.
It is forbidden to install dry stove in bedrooms, bath-
rooms and other rooms where other heating equipment
without independent air inflow are installed (fireplace,
stove, etc.).
It is also forbidden to set dry stove in explosive atmos-
pheres.
It is forbidden to cover circulation openings in housing
of the dry stove.
5.3.
CONNECTION TO EXTERNAL AIR INTAKE
Room, where the dry stove is installed, should be equipped with
inflow of air in minimum amount required for correct combustion pro-
cess and for room ventilation. This can be done by executing fixed
vents in wall directed to the outside or through independent or common
ventilation ducts.
External wall near the stove should have through opening with free
cross-section 100 cm
2
(opening with 12 cm in diameter or square 10 x
10 cm), protected with grille on internal and external side, for this pur-
pose. Furthermore, the air intake should be:
directly connected with the room, where the stove 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).
Closed combustion chamber allows installation of the OMNIPELL
stove in rooms equipped with heat recovery. In such case the stove
should be supplied only with air supplied to air intake directly from out-
side (picture 5). Inlet pipe should have an elbow at its end directed
downwards or protected against the wind. Grilles with small mesh
should not be installed in such case.
Picture 5 Connection of the dry stove OMNIPELL to external air intake.
For connection to external inlet of air and longer break in opera-
tion (over 2 weeks) it is necessary to empty the bin and pellet feeder.
5.4.
INSTALLATION TO FLUE
Dry stove should be connected to individual flue. Chimney draught
for the OMNIPELL stove should be from 10 to 14 Pa.
During execution of opening for flue gas discharge pipe you should
consider possible occurrence of inflammable materials. If the opening
will pass through the wooden wall or wall made of material sensitive to
heat then you should obligatory maintain minimum distance from flam-
mable 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 insulated industrial
pipe, which can be also used outdoors, to avoid occurrence of conden-
sate.
For correct operation connector between the dry stove and flue or
smoke duct should be executed acc. to the below recommendations:
horizontal sections should have minimum slope 3%,
length of horizontal section should be minimum and should
not exceed 2/3 metre,
number of changes of directions, inclusive of use of the “T”
component, should not exceed 4.
Picture 6 Example of connection of OMNIPELL stove to flue without
condensate discharge.
Air inlet
condensate collector
rosette
non-flammable
material
flue
mortar
diameter of
connection with flue
cleaning opening
