Cadel ATENA3 PLUS 12 User guide

INSTALLER MANUAL
Pellet Stove
EN
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ATENA3PLUS 12/14  DUKE 12/14 AIRTIGHT SABA 12/14
MITHOS3PLUS 12/14

ATENA3 PLUS 12/14 - DUKE 12/14 AIRTIGHT - SABA 12/14 - MITHOS3 PLUS 12/14
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SUMMARY
1 MANUAL SIMBOLOGY....................................3
2 PACKAGING AND HANDLING..........................3
2.1 PACKAGING .............................................................3
2.2 REMOVING THE STOVE FROM THE PALLET ..............3
2.3 STOVE HANDLING....................................................4
3 CHIMNEY FLUE .............................................4
3.1 INTRODUCTION.......................................................4
3.2 CHIMNEY FLUE........................................................4
3.3 TECHNICAL FEATURES.............................................5
3.4 HEIGHTDEPRESSION..............................................6
3.5 MAINTENANCE........................................................6
3.6 CHIMNEY POT..........................................................6
3.7 CHIMNEY COMPONENTS.........................................7
3.8 CHIMNEY FLUE CONNECTION..................................7
3.9 EXAMPLES OF CORRECT INSTALLATION..................8
4 COMBUSTION AIR.......................................10
4.1 EXTERNAL AIR INLET.............................................10
4.2 COMBUSTIBLE AIR INLET FOR SEALEDCHAMBER
INSTALLATION .................................................................11
4.3 COMBUSTIBLE AIR INLET FOR SEALEDCHAMBER
INSTALLATION .................................................................11
5 INSTALLATION............................................12
5.1 INTRODUCTION.....................................................12
5.2 OVERALL DIMENSIONS .........................................12
5.3 GENERAL INSTALLATION.......................................14
5.4 STOVE DOOR REMOVAL/INSTALLATION................14
5.5 REMOVAL OF CAST IRON COVER AND CAPS ATENA3
PLUS 12/14  DUKE 12/14 AIRTIGHT ..............................15
5.6 REMOVAL/ASSEMBLY OF SIDE PANELS DUKE 12/14
AIRTIGHT  SABA 12/14..................................................16
5.7 REMOVAL/ASSEMBLY OF BACK PANELS ATENA3PLUS
12/14..............................................................................17
5.8 REMOVAL/ASSEMBLY OF METAL PROFILES ATENA3
PLUS 12/14.....................................................................17
5.9 TILES ASSEMBLY ATENA3PLUS 12/14.................18
5.10 REMOVAL/ASSEMBLY OF TILE PROFILES ATENA3
PLUS 12/14.....................................................................18
5.11 FRAME ASSEMBLY MITHOS3 PLUS 12/14...........19
5.12
REMOVAL OF SIDE PANELS MITHOS3 PLUS 12/14 ....20
5.14 REAR OR UPPER FUME EXHAUST ATENA3PLUS 12/14
 DUKE 12/14 AIRTIGHT  SABA 12/14 ...........................20
5.15 CONCENTRIC PIPEKIT ASSEMBLY ATENA3PLUS
12/14  DUKE 12/14 AIRTIGHT  SABA 12/14 .................21
5.16 HOT AIR DUCTING SYSTEM ATENA3PLUS 12/14 
DUKE 12/14 AIRTIGHT  SABA 12/14..............................22
5.17 HOT AIR DUCTING MITHOS3 PLUS 12/14 ...........25
5.18 USING THE STOVE WITHOUT DUCTING ATENA3PLUS
12/14  DUKE 12/14 AIRTIGHT  SABA 12/14 .................28
5.19 CONNECTION TO THE EXTERNAL THERMOSTAT.....28
5.20 ELECTRIC CONNECTION.........................................28
5.21 STOVE CALIBRATION AND DEPRESSION
MEASUREMENT ...............................................................29
6 SPECIAL MAINTENANCE ..............................30
6.1 INTRODUCTION.....................................................30
6.2 FUME CHAMBER CLEANING..................................30
6.3 FUME PASSAGE CLEANING....................................31
6.4 FUME FAN CLEANING............................................32
6.5 ROOM FAN CLEANING ...........................................32
7 IN CASE OF ANOMALY..................................33
7.1 PROBLEM SOLVING ...............................................33
8 TECHNICAL DATAS ......................................36
8.1 REPAIR INFORMATION ..........................................36
9 FEATURES ..................................................37

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ATENA3 PLUS 12/14 - DUKE 12/14 AIRTIGHT - SABA 12/14 - MITHOS3 PLUS 12/14
1 MANUAL SIMBOLOGY
USER
AUTHORISED TECHNICIAN
(ONLY to interpret or the Stove-manufacturer or the Authorized Techni-
cian of Technical Assistance Service approved by the Stove-manufacturer)
SPECIALIZED STOVE-REPAIRER
CAUTION:
READ CAREFULLY THE NOTE
CAUTION:
DANGER OR IRREVERSIBLE DAMAGE POSSIBILITY
• The icons with the stylized figures indicates whom the subject dealt in the paragraph is addressed to (between the User and/
or the AuthorizedTechnician and/or the Specialized Stove-repairer).
• WARNING symbols indicates an important note.
2 PACKAGING AND HANDLING
2.1 PACKAGING
• The packaging is made up of recyclable cardboard boxes according to RESY standards, recyclable expanded polystyrene inserts
and wooden pallets.
• All packaging materials can be re-used for a similar use or eventually discharged as waste assimilable to the municipal solid
ones, in accordance with current regulations.
• After having removed the packaging please assure you about the integrity of the product.
2.2 REMOVING THE STOVE FROM THE PALLET
Proceed as follows:
Fig. 1 - Bracket removal
• Remove the brackets which secure the feet of the stove (see Fig. 1). Then remove the stove from the pallet.

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2.3 STOVE HANDLING
Both whether the stove is packed or not it is necessary to observe the following instructions for handling and transporting the
stove from its sale point to its installation point and for any future movements:
• The stove must be handled with idoneous means paying attention to the existing safety regulations;
• do not turn the stove upside down and/or upset it on one side, but keep it in vertical position or as accorded with the construc-
tor instructions;
• if the stove is made up of ceramic, stone, glass or any particularly fragile material components, all must be moved with the
utmost care.
3 CHIMNEY FLUE
3.1 INTRODUCTION
This chapter about the Chimney Flue has been drawn up in cooperation with Assocosma (www.assocosma.org) and is based on
European Standards (EN 15287 - EN 13384 - EN 1856 - EN 1443) and UNI 10683:2012.
It provides instructions for a good and correct execution of the chimney flue but it does not absolutely replace the current stan-
dards which the qualified manufacturer/installer should comply with.
3.2 CHIMNEY FLUE
Fig. 2 - Chimney Flues
LEGEND Fig. 2
1Chimney flue with insulated stainless-steel pipes
2Chimney flue on the existing chimney
3Inspection plug
4Inspection door
5≥ 3,5 mt
• The chimney flue or chimney is of great importance for the correct running of the heating appliance.
• It is fundamental that the chimney flue is perfectly built and always maintained with a perfect efficiency.
• The chimney flue must be sole (see Fig. 2) with insulated stainless-steel pipes (1) or installed on the existing chimney flue (2).
• Both this solutions must be endowed with an inspection plug (3) and/or an inspection door (4).

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3.3 TECHNICAL FEATURES
Fig. 3 - Inclined roof
LEGEND Fig. 3
1Height over the ridge of the roof = 0,5 mt
2Roof inclination ≥ 10°
390°
4Measured distance at 90° from the roof surface = 1,3 mt
• The chimney flue must be sealed from fumes.
• It must have a vertical run without narrowing. It must be realized with fume and condensation resistant materials with ther-
mal insulation and able to last against usual mechanical stresses.
It must be insulated to avoid condensation and to reduce fume cooling effects.
• The stove must be spaced out from fuels or flammable materials with an air gap or with insulating materials. Check the distan-
ce with the chimney manufacturer.
• The chimney entrance must be placed in the same room where the appliance is installed or otherwise in the adjacent room
and it must be provided with a solid and condensation collection chamber under the entrance, accessible through the sealed
metal gate.
• Auxiliary exhaust fans cannot be installed neither along the chimney nor on the chimney pot.
• The inner section of the chimney flue can be round (the best one) or square and the jointed sides must have a minimum radius
of 20 mm.
• The section dimension must be:
•minimun Ø100 mm
•recommended max Ø180 mm
• Made the efficiency of the chimney flue overhauled by an expert stove-repairer and if necessary cover the chimney flue with
materials in compliance with current regulations.
• The flue system must be placed on the roof.
• The chimney flue must be provided CE in accordance with EN 1443 regulation. Please find attached an example of label:

ATENA3 PLUS 12/14 - DUKE 12/14 AIRTIGHT - SABA 12/14 - MITHOS3 PLUS 12/14
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Fig. 4 - Example of label
3.4 HEIGHTDEPRESSION
The depression (draught) of a chimney flue depends also on its height. Check the depression with the values provided at FEATU-
RES a pag. 37. Minimum height 3,5 meters.
3.5 MAINTENANCE
• The fumes extraction pipes (fumes conduit + chimney flue + chimney pot) must always be cleaned, scrubbed and checked
by an expert stove-repairer, in compliance with current regulations, with the instructions of the stove-manufacturer and the
directives of your insurance company.
• In case of doubts, please follow the most restrictive regulations.
• Have your chimney flue and chimney pot checked and cleaned by an expert chimney sweep at least once a week. The chimney
sweep has to release a written declaration about the security of the system.
• Not cleaning compromise safety.
3.6 CHIMNEY POT
Fig. 5 - Anti-wind chimney pots
The chimney pot is important for the correct running of the heating appliance:
• We recommend using an anti-wind chimney pot, see Fig. 5.
• The hole width for fumes exhaust must be the double of the chimney flue width and fitted in a way that the fume exhaust is
assured also in case of wind.
• It should prevent the infiltration of rain, snow and animals.
• The outlet height in the atmosphere must be away from the reflux area caused by the roof structure or by obstacles laying
nearby (see Fig. 3).

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3.7 CHIMNEY COMPONENTS
Fig. 6 - Chimney components
LEGEND Fig. 6
1Chimney pot
2Fume outlet
3Chimney flue
4Termal insulation
5External wall
6Chimney union
7Fume pipe
8Heat generator
9Inspection door
10 T-union with inspection plug
3.8 CHIMNEY FLUE CONNECTION
Your pellet stove works through a fume draught forced by a fan. It is obligatory to check that all pipes are realized in compliance
with the following regulation on material selection: EN 1856-1, EN 1856-2 e UNI/TS 11278. All must be effected by specialized
personnel or companies as provided by UNI 10683:2012.
• The connection between the appliance and the chimney flue should be short in order to favor the draught and to avoid con-
densation in the pipes.
• The fume conduit should be equivalent or longer than the outlet joint ones (Ø 80 mm).
• Some stove models are endowed with a lateral and/or back exhaust. Check that the unused exhaust is sealed with the plug
given with standard equipment.
SYSTEM TYPE Ø80 mm PIPE Ø100 mm PIPE
Minimum vertical length 1,5 mt 2 mt
Maximum length (with 1 union) 6,5 mt 10 mt
Maximum length (with 3 unions) 4,5 mt 8 mt
Maximum number of unions 3 3
Level section (minimum inclination 3%) 2 mt 2 mt
Installation at a height above 1200 m a.s.l. NO Obligatory

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• Use a plate pipe for stoves of Ø80 mm or Ø100 mm depending on the type of system and with silicone gaskets.
• It is forbidden to use metal, fibre cement or aluminium flexible pipes.
• For change of direction it is obligatory always to use a union (with angle > 90°) with inspection plug which enables an easy
periodic cleaning of the pipes.
• Please assure you that after the cleaning the inspection plugs are sealed with its efficient gasket.
• It is forbidden to exhaust flue gases directly from the wall towards the outside and closed spaces also at open top.
• The fume conduit must be placed at a distance of minimum 500 mm from flammable or heat-susceptible components.
• It is prohibited to connect more than one wood/pellet (*) or any other type of appliance (vent cowling...) to the same flue.
(*) unless there are national derogations (for instance in Germany), which under suitable conditions allow for the installation of
several appliances in the same fireplace. In any case, strictly follow the product/installation requirements of the relative regulations/
legislation in force in that country.
3.9 EXAMPLES OF CORRECT INSTALLATION
Fig. 7 - Example 1
LEGEND Fig. 7
1Insulating material
2Reduction from Ø100 to Ø80 mm
3Inspection plug
4Minimum safety distance = 0,5 mt
• Chimney flue installation Ø100/120 mm with an enlarged drilling for pipe transit.

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Fig. 8 - Example 2
LEGEND Fig. 8
1Insulating material
2Inspection plug
3Chimney inspection entrance
4Minimum safety distance = 0,5 mt
5Inclination ≥ 3°
6Level section ≤ 1 mt
• Old chimney flue with an inserted pipe of minimum Ø100/120 mm and with an external door which enables the chimney
cleaning.
Fig. 9 - Example 3
LEGEND Fig. 9
1Insulating material
2Inspection plug
3Minimum safety distance = 0,5 mt

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• External chimney flue entirely made up of insulated stainless steel pipes, i.e. with double wall of minimum Ø100/120 mm: all
must be firmly attached to the wall. For chimney against wind effects please (see Fig. 5).
• Ducting system through T-unions which enables an easy cleaning without disassembling the pipes.
We recommend to check with your chimney flue manufacturer the safety distances which must be respected
and the type of insulating material. The aforesaid regulations are valid also for holes made on the wall (EN
13501 - EN 13063 - EN 1856 - EN 1806 - EN 15827).
4 COMBUSTION AIR
4.1 EXTERNAL AIR INLET
Fig. 10 - Direct air inow
LEGEND Fig. 10
1Room to ventilate
2External air inlet
• The room must be endowed with an external air recycling for a good climate in your ambient.
• The air inflow from outside to the inner occurs directly, through an opening on the external wall of the room (see Fig. 10).
• Bedrooms, garages, and store of flammable materials are excluded.
• The air inlet should have a total net surface of 80 sqcm2: the aforesaid surface is to widen if inside the room there are other
activated appliances (for example: electric ventilators for foul air suction, cooker hoods, other stoves, etc...) which depress the
environment.
• At switched on appliance it is necessary to check that the pressure fall between the room and the outside does not exceed 4,0
Pa value: if necessary widen the air inlet (EN 13384).
• The air inlet must be realized at a height close to the floor with an external grid against birds. In such a way it cannot be ob-
structed by any object.
• In case of installation with sealed-chamber the air inlet is not necessary.

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4.2 COMBUSTIBLE AIR INLET FOR SEALEDCHAMBER INSTALLATION
Fig. 11 - Air inlet for sealed-chamber installation
LEGEND Fig. 11
1≥ 1,5 mt
2≥ 0,3 mt
3-3 Sectional view
4Shield grid
5Curve inlet to turn downwards
Check if the purchased stove has a sealed-chamber. If the stove is endowed with a sealed-chamber and you want also the whole
installation with sealed chamber, please read the following instructions:
• It is necessary to extract the air for combustion directly from outside.
• Use a tube with minimum Ø60 mm and maximum 2 meters lenght; to connect see the back of the stove.
• French standards require installation in double-walled flues (concentric system).The combustion air is drawn from the cavity.
• During installation step is necessary to verify the minimum distances required for the combustible air inlet as (for example)
an open door or window causes a vortex which could remove the combustible air necessary to the stove (see the underlying
scheme).
• On the external wall it is necessary to install a curve at 90° to protect the combustible air inflow from wind effects: turn the
curve inlet downwards, see Fig. 11.
• Endow the curve with an external shield grid against birds in such a way that it cannot be obstructed by any object.
Check with your local authorities if exists any restrictive regulation regarding the combustible air inlet: if pre-
sent, they must be applied
In some countries and/or regions the installation with sealed-chamber is obligatory: in case of doubt, please
follow the most restrictive regulations.
4.3 COMBUSTIBLE AIR INLET FOR SEALEDCHAMBER INSTALLATION
How to connect to the stove in the sealed chamber with concentric system:

ATENA3 PLUS 12/14 - DUKE 12/14 AIRTIGHT - SABA 12/14 - MITHOS3 PLUS 12/14
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Fig. 12 - Phase1
• Connect the air intake pipe to the combustion air pipe of the stove and tighten everything with a clamp (see [Fig. 12).
5 INSTALLATION
5.1 INTRODUCTION
• The assembly position must be chosen depending on environment, outlet, chimney flue.
• Check with local authorities if there are any restrictive regulations which regard the combustible air inlet, room ventilation,
fume exhaust system together with chimney flue and chimney pot.
• Check if there is the combustible air inlet.
• Check the probable presence of other stoves or appliances which could depress the room.
• Check at switched on stove if there is the presence of CO in the room.
• Check if the chimney has the necessary draught.
• Check if during the fume passage all has been executed in safety (probable fume losses and distances from flammable mate-
rials, etc.…).
• The installation of the appliance must enable an easy access for appliance, fume exhaust pipes and chimney flue cleaning.
• The installation must enable en easy access to the electric connection plug (see ELECTRIC CONNECTION a pag. 28).
• To install more appliances, the external air inlet must be correctly dimensioned (see FEATURES a pag. 37).
5.2 OVERALL DIMENSIONS
Fig. 13 - General dimensions: Atena3Plus 12/14
LEGEND Fig. 13
AExhaust fumes d.8 cm
BHole combustion air inlet d.6 cm
CDucting outlet d.8 cm

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Fig. 14 - General dimensions: Duke 12/14 Airtight
LEGEND Fig. 14
AExhaust fumes d.8 cm
BHole combustion air inlet d.6 cm
CDucting outlet d.8 cm
Fig. 15 - General dimensions: Saba 12/14
LEGEND Fig. 15
AExhaust fumes d.8 cm
BHole combustion air inlet d.6 cm
CDucting outlet d.8 cm

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Fig. 16 - General dimensions: Mithos3Plus 12/14
LEGEND Fig. 16
AExhaust fumes d.8 cm
BHole combustion air inlet d.6 cm
CDucting outlet d.8 cm
5.3 GENERAL INSTALLATION
Fig. 17 - General installation
LEGEND Fig. 17
1Stove
2Minimum lateral distance = 300 mm
3Minimum rear distance = 200 mm
4Minimum front distance = 1000 mm
It is obligatory to install the stove away from walls and/or pieces of furniture, with a minimum air flow of 300 mm on the sides and
200 mm on the back, to enable an eficient appliance cooling and a good distribution of heat in the room (see Fig. 17).
If the walls are made up of flammable materials, check the safety distances (see Fig. 17).
At maximum power check that the wall temperature does not ever exceed 80°C. If it would be necessary please install a fire re-
sistant plate on the concerned walls.
In some countries also masonring load-bearing walls are considered flammable.
5.4 STOVE DOOR REMOVAL/INSTALLATION
DOOR REMOVAL
For some operations (e.g.: side panel assembly and cleaning) you must remove the stove door.
To remove the door:
• Open the door.
• Use a screwdriver to rotate the lever in the direction of the arrow (vedi Fig. 18).
• Lift the door to allow the door pivots to slide out of the structure bracket (see Fig. 19).
• Keep the door in a safe place until next use.

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Fig. 18 - Remove screws Fig. 19 - Door removal
DOOR ASSEMBLY
To assemble the door you must centre the pivots fixed to the door, on the structure bracket.
After having mounted the door with the screwdriver, lift the lever so that the door is locked.
5.5 REMOVAL OF CAST IRON COVER AND CAPS ATENA3PLUS 12/14  DUKE 12/14 AIRTIGHT
ATTENTION: it takes 2 persons to lift the cover.
To remove the cast-iron cover, proceed as follows:
• Undo the 2 back screws (see ).
• Lift the cast iron cover (see ).
Fig. 20 - Remove the screws Fig. 21 - Remove the cover
To remove the cast-iron caps, proceed as follows:
• Push on one side of the cap and remove it (see Fig. 22).

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Fig. 22 - Remove cap
5.6 REMOVAL/ASSEMBLY OF SIDE PANELS DUKE 12/14 AIRTIGHT  SABA 12/14
To disassemble the side panels, proceed as follows:
• Undo the screws of the upper panel (see Fig. 23) and release the panel (see Fig. 24).
• Release the lower panel (see Fig. 25).
Fig. 23 - Remove the screws Fig. 24 - Release upper panel Fig. 25 - Release lower panel
• Undo the front screws of the side panel (see Fig. 26).
• Open the panel at the back (see Fig. 27).
• To assemble proceed in reverse order.
Fig. 26 - Remove screws Fig. 27 - Release side panel

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5.7 REMOVAL/ASSEMBLY OF BACK PANELS ATENA3PLUS 12/14
To disassemble the back panels, proceed as follows:
• Remove the cast iron cover (see dedicated chapter).
• Undo the front screws of the black panel (see Fig. 28).
• Open the panel and release the rear teeth (see Fig. 29).
• To assemble proceed in reverse order.
Fig. 28 - Remove the screws Fig. 29 - Remove the side panels
5.8 REMOVAL/ASSEMBLY OF METAL PROFILES ATENA3PLUS 12/14
To disassemble the front profiles, proceed as follows:
• Remove the cast iron cover (see dedicated chapter).
• Release both front panels (see Fig. 30).
• Undo the front screws of the profile (see Fig. 31 and Fig. 32).
Fig. 30 - Remove the front panels Fig. 31 - Remove the screws Fig. 32 - Remove the screws
• Open the side and release the panel (see Fig. 33).
• To assemble proceed in reverse order.

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Fig. 33 - Release the panel
5.9 TILES ASSEMBLY ATENA3PLUS 12/14
To disassemble the tiles, proceed as follows:
• Place the tiles on a worktop and set the tile support above it.
• Have the holes of the profile match those of the tiles and apply all the screws (see Fig. 34).
• For assembly on the stove, see the next chapter.
Fig. 34 - Tiles assembly
5.10 REMOVAL/ASSEMBLY OF TILE PROFILES ATENA3PLUS 12/14
To disassemble the front profiles, proceed as follows:
• Remove the cast iron cover (see dedicated chapter).
• Push the panel with the tiles upwards and release it from the stove (seeFig. 35).
• To assemble proceed in reverse order.
Fig. 35 - Release the panel

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5.11 FRAME ASSEMBLY MITHOS3 PLUS 12/14
To assemble the frame, proceed as follows:
• Fix the right and left panels with the screws (see Fig. 36 e Fig. 37).
• Take the upper panel and fold the two tabs downwards (see Fig. 38).
Fig. 36 - Fix side panels Fig. 37 - Fixed panels Fig. 38 - Fold the tabs
• Fit the external hooks into the provided slots, taking care to match the head of the central screw with the hole in the panel (see
Fig. 39 e Fig. 40).
• To lock the upper panel, fix the previously folded tabs to the side panels with a screw (see Fig. 41).
Fig. 39 - Upper panel 1 Fig. 40 - Upper panel 2 Fig. 41 - Fix upper panel
• Take the lower panel and fold the 2 tabs upwards (see Fig. 42).
• Fit the external hooks into the provided slots (see Fig. 43).
• To lock the lower panel, fix the previously folded tabs to the air outlets (see Fig. 44).
Fig. 42 - Fold the tabs Fig. 43 - Lower panel Fig. 44 - Fix lower panel

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5.12 REMOVAL OF SIDE PANELS MITHOS3 PLUS 12/14
5.13
To disassemble the side panels, proceed as follows:
• Remove the 2 screws of the side from the bottom of the panel (see Fig. 45).
• Unhook the side panel (see Fig. 46).
• To assemble, proceed in reverse order.
Fig. 45 - Screw removal Fig. 46 - Removing the side panel
5.14 REAR OR UPPER FUME EXHAUST ATENA3PLUS 12/14  DUKE 12/14 AIRTIGHT  SABA 12/14
The connection of the fume exhaust can be at the back or on top.
REAR EXHAUST
Fig. 47 - Connection of the fume exhaust
• Position the pipe as shown in Fig. 47.
UPPER EXHAUST
Fig. 48 - Remove the cap (Saba 14) Fig. 49 - Remove the cap (Atena3Plus 12/14 -
Duke At)
Fig. 50 - Connect the Tee tting