ORTNER 1 User manual
Assembly instructions
and operating manual
ORTNER Wood-fired oven (HBO)
To avoid any errors, please first carefully read our assembly instructions!
CAUTION: The door must be provided as a covering door; the oven opening is smaller
than the door (see chapter “Plaster support surface”)
The assembly manual provided below should merely serve as a guide. The details can
be designed individually.
The respective national or local regulations and general provisions, stipulations and
codes of practice must be complied with.
ORTNER GmbH
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Contents
General information ................................................................................................................................................................. 3
Additional information in the event of the use of the wood-fired oven in the interior area ............................................... 4
Technical specifications ............................................................................................................................................................ 5
It is prohibited to use the following substances for combustion ........................................................................................... 5
Design examples ....................................................................................................................................................................... 6
Foundation preparation ........................................................................................................................................................... 7
Base frame, base, substructure of the wood-fired oven ...................................................................................................... 10
Assembly of the interior parts................................................................................................................................................ 12
Model 0............................................................................................................................................................................... 12
Model 1 & 2 ........................................................................................................................................................................ 13
Model 3 & 4 ........................................................................................................................................................................ 14
Further assembly (all models) ........................................................................................................................................... 16
Insulation of the jacket segments .......................................................................................................................................... 17
Plaster base surface ................................................................................................................................................................ 18
Information on the heating procedure.................................................................................................................................. 19
Tips for your customers .......................................................................................................................................................... 19
Dimensioned drawings ........................................................................................................................................................... 20
Model 0 (art. no. 1500000) ............................................................................................................................................... 20
Model 1 (art. no. 1500001) ............................................................................................................................................... 21
Model 2 (art. no. 1500002) ............................................................................................................................................... 22
Model 3 (art. no. 1500003) ............................................................................................................................................... 23
Model 4 (art. no. 1500004) ............................................................................................................................................... 24
Accessories for ORTNER wood-fired oven............................................................................................................................. 25
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General information
Before the commissioning of the firing installation, read this operating manual and assembly instructions and
observe the warnings and cautions. As soon as the commissioning of the oven has been performed, the
operating manual and assembly instructions including all usage regulations are considered as accepted without
exception, this also applies in the event that the operating manual and assembly instructions have not been
read.
Heat energy is released with the combustion of wood, which leads to a strong heating up of the surrounding
parts. Coming into contact with these components without the use of corresponding protection or aids (heat-
protection glove) must be prevented.
Ensure sufficient distance to combustible objects.
Instruct your children of this particular hazard and keep them out of reach of the oven during heating
operation.
It is prohibited to place objects that are not heat-resistant on the firing installation or to bring them into its
vicinity.
The handling of highly combustible or explosive substances is prohibited during the operation of the oven.
Operating errors can lead to deflagration and as a result to the damaging of the oven or cause severe injuries.
Only spare parts approved by the manufacturer may be installed.
The most important precondition for the proper and reliable function of your wood-fired oven is dry, untreated
hardwood (permissible types of wood: beech, birch, hornbeam) with a maximum residual moisture content of
20%. Wood will only achieve an optimal heating value when it has been stored dry and ventilated under a roof
for at least two years.
In addition to a greatly reduced heating value, wet wood generates an excess of shining soot deposits (pitch-
like deposit) on the ceramic components as well as the chimney (risk of a chimney fire in the event of indoor
installation).
In regard to the use of the processing materials, pay attention that these are suitable for the exterior area or
the respective area of application.
Additionally, it is recommended to protect the Ortner wood-fired oven against weather influences (e.g. driving
rain). This can for example be performed with a roof, a pergola or a protective tarpaulin (please note that the
wood-fired oven poses a possible source of flying sparks).
Please remember that all national laws/regulations (e.g. building regulations, safety distances, etc.) must be
complied with for the installation of the oven.
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Additional information in the event of the use of the wood-fired oven in the interior area
Please note that neither combustible nor explosive substances may be located in the installation space of the
oven.
The wood-fired oven may not be installed in spaces with insufficient combustion air supply. (CAUTION: Please
note that newly constructed or renovated buildings can be very airtight and as a result, a sufficient combustion
air supply may not be possible without additional equipment.)
The wood-fired oven may not be operated in installation spaces that are ventilated by means of fans in
ventilation or heating air systems with the exception that the safe operation of the oven can be ensured. This
means:
A simultaneous operation of an air extraction system and the firing installation must be prevented.
The negative pressure in the installation space must be prevented automatically and reliably by means of
corresponding safety equipment.
Overall, the negative pressure generated as a result of the combustion air flow of the oven and the volume
flows of the ventilation systems in the installation space and the rooms connected via the ventilation
system may not exceed a value of 2 Pa. This must also be ensured in the event of the adjustment or
removal of easily accessible control devices of the ventilation system.
The system may only circulate the air within a room.
The oven may not be installed in freely accessible spaces or on freely accessible areas (this also includes
stairwells in the event of multiple tenants). Installation/exhibition spaces are exempted from this; however,
the firing installation must be operated under expert supervision.
No combustible objects may be located at a distance of 80 cm to the adjustment door.
Attention must be paid that the installation of the wood-fired oven is only permitted on those locations in
which a sufficient load-bearing capacity of the installation area is ensured. Should this not be the case, then
additional measures must be taken to achieve this (e.g. incombustible board for the distribution of the load).
The regular cleaning of the chimney may only be performed by a licensed specialist.
This firing installation is NOT suitable for multiple connections of the chimney.
The firing installation must be connected in a gas-tight manner in the event of a vertical connection of the
chimney.
Consult your local chimney sweep on the suitable chimney connection.
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Technical specifications
Ortner wood-fired oven
Variant
Model 0
Model 1
Model 2
Model 3
Model 4
Max. fuel amount (per firing instance) [kg]
8
9
12
14
20
Total weight [kg]
235
370
370
435
510
Material thickness (combustion chamber parts)
[kg/m3]
1,900
1,900
1,900
1,900
1,900
Temperature resistance [°C]
1,200
1,200
1,200
1,200
1,200
Average CO2content [%]
6.2
6.9
6.9
7.1
7.2
Average exhaust temperature [°C]
160
205
213
210
227
Required discharge pressure [Pa]
4
4
4
4
4
Stack gas mass flow [g/s]
28.3
31.1
36.1
42.4
51.4
It is prohibited to use the following substances for combustion
Moist wood
Soft or resinous wood
Bark and chipboard waste
Painted and coated wood
Woodchips, wood pellets
Plastics, cardboard
Kitchen and household waste
Coal of any type
Combustible liquids
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Design examples
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Foundation preparation
2.
Perform the excavation. Depending on the
building regulation, excavate your area down
to the frost line in order to achieve a stable
and frost-resistant foundation.
1.
Choose the desired size of your foundation
length x width
Minimum requirement:
Model 1: 1.25 m x 1.25 m
Model 2: 1.4 m x 1.4 m;
Model 3: 1.5 m x 1.5 m;
Model 4: 1.65 m x 1.65 m
Depending on the model size or the floor
covering, you can design the measurements
yourself; however, the minimum dimensions
must be adhered to.
Model 1 (1.25 m x 1.25 m)
Size of the desired floor space
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4.
Compact the gravel base (by means of
pounding, plate vibrator, etc.).
Cast the concrete slab with a minimum
thickness of 10 cm (observe local building
regulations). Provide the base plate with a
reinforcement.
3.
Fill the pit with corresponding subsoil or
gravel material; at least 10 cm should remain
free for a concrete slab.
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6.
It is recommended to provide the floor area
of the HBO with building sealing to protect
the oven against rising moisture.
5.
Note: If you want to install a footpath made
of natural stone tile or a paving stone surface
fixed cast in concrete, then please pay
attention to the required height of the
structure for the respectively selected
installation material. If required, create
inclined concrete.
Seal against rising moisture
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Base frame, base, substructure of the wood-fired oven
8.
Cover your base frame and create a structural
weight-bearing foundation for the inner parts
(Ortner HBO) using suitable building
materials. (Lintel, bricks, cellular concrete,
concrete, metal board, etc. Caution:
Temperature load of up to 250 °C possible.)
Note 1: Pay attention to recesses such as for
the desired ash pan.
Note 2: Pay attention to the height of the
construction. The oven must be insulated
against the loss of heat below the interior
parts.
(2 x Isoboard sheet 6 cm)
7.
Now design the desired base frame shape of
your Ortner HBO using suitable building
materials (e.g. open-end blocks, bricks,
cellular concrete blocks, concrete, etc.).
Because the base frame is not subjected to a
thermal load, these building materials do not
have to be heat-resistant. However, attention
must be paid that sufficient structural loading
capacity is ensured. Frost-resistant materials
must be used in the exterior area.
Example 1
Example 2
Insulation made of Isoboard
Recess for the ash pan
Example
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10.
When the foundation has been completed,
you can begin with the construction of the
inner parts of the Ortner HBO.
9.
Adjust the difference of level of the
insulation. Cast your cover to the desired
shape in concrete.
Note: Ensure that possible surface water can
drain off.
Natural stone, bricks, tiles
Desired cover shape
Drip edge
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Assembly of the interior parts
Model 0
Important: The base plates are only
assembled dry and should not be bonded.
Slide the base plates together and secure
with clamps made of stove fitter’s wire in
order to safeguard additional stability.
For this, cuts and holes have already been
provided for the position of the clamps.
Scope of material for the construction of the
floor:
2 base plates
Stove fitter’s wire (clamps)
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Model 1 & 2
Slide the base plates together and secure
with clamps made of stove fitter’s wire in
order to safeguard additional stability.
For this, cuts and holes have already been
provided for the position of the clamps.
Caution:
On model 1 & 2, the base plates are
assembled flush (without metallic assembly
aids).
Scope of material for the construction of the
floor:
Stove fitter’s wire (clamps)
Important: The base plates are only assembled
dry and should not be bonded.
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Model 3 & 4
Then the same applies to the opposite side.
First slide the base plates flush together on
one side (left or right) and then secure with
the metal clamps.
Scope of material for the construction of the
floor:
2 or 4 base plates (depending on the
model)
Stove fitter’s wire (clamps)
Packing strip, Ø 10 mm
Metallic assembly aids (thickness =
6 mm)
Important: The base plates are only assembled
dry and should not be bonded.
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Now close the 6 mm gap that has been
created with the provided packing strip.
Finally, also clamp the parts of the right and
left-hand side. In the course of this, pay
attention that the base plates press against
the packing strip.
Now insert the assembly aids and slide the
parts of the left and right-hand side together
in a secured manner, creating a gap with a
width of 6 mm.
Subsequently, remove the assembly aids.
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Further assembly (all models)
Place the base plates on the insulation
→Creation of the base plate.
Do not bond!
Position the connection adapter with shut-off
damper (CAUTION: Tension is generated as a
result of the thermal load of the combustion
chamber shell bricks).
Assemble the jacket segments (tongue and
groove system) dry. Install the jacket segment
with the two grooves as the end stone.
Do not bond!
Changeable floor
Jacket segments
Base plate
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Insulation of the jacket segments
Cover the jacket segments with rock wool for
insulation (at least 10 cm) and Stauss fabric as
a plaster base.
CAUTION: The installation of the wood-fired
oven on a combustible wall is not permissible.
Ensure that the chimney is also insulated.
Keep in mind that a high chimney will cause a
high draught and as a result may limit the
heat storage capacity (the ideal chimney
height lies in the range of 0.75 to 1.25 m,
proof of functionality of the chimney is
required in accordance with EN 13384-1). In
the event of higher chimneys, a
corresponding reduction of the draught must
be ensured.
Plaster
Stauss fabric
Rock wool
insulation
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Plaster base surface
Create a plaster base surface on the mineral wool using suitable building materials (Stauss brick fabric, bricks, etc.).
Plaster or cover the oven individually for your customer using suitable materials. These should
be suitable for the exterior area, frost-resistant and matching the foundation (e.g. tiles, natural
stone, quarry stone, or similar).
During processing, pay attention to the various building regulations and the respective processing
regulations of the manufacturers or the selected building materials.
Door connection:
The Ortner adjustment door for the wood-
fired oven has not been designed as a slide-in
door, but as a covering door. The door is
larger than the oven opening.
Create an arch roof based on the door size
using bricks, chamotte or other suitable
building materials as a connection to the
combustion chamber and for insulation.
Fabrication of the cleaning opening to the ash
pan in the arch roof or the adjustment door
area.
Stop for the adjustment
door
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Information on the heating procedure
The ORTNER wood-fired oven can be used both as a cooking or bread baking oven as well as dehydration and pizza oven.
First a cross stack is created in the oven cavity with approx. 2/3 of the maximum wood stacking amount (approx. 33 cm
logs) and is ignited to a roaring fire using suitable fire-lighters. Set the adjustment door in the intended opening. Ensure
that the chimney damper is open and that the ventilation slots of the adjustment door are open. After approximately
half an hour the first goods to be baked can be inserted in the oven. Pay attention that it is covered with tinfoil.
Depending on the size of the logs, the remaining 1/3 of the logs can be piled on after approximately half an hour. In the
course of this, the walls of the baking oven and the floor absorb a large amount of heat energy and store this for several
hours. The heating material (hardwood) should be absolutely dry.
Tips for your customers
Tip 1:
In the event of baked goods (desserts, breads, etc.) the embers must be distributed along the entire area of the oven
cavity. Here, the ventilation dampers and the ventilation slots of the adjustment door should be closed. To ensure that
the heat distributes evenly throughout the oven cavity, the oven should now “rest” (approx. 1/2 hour). Following this,
clean the ash out of the baking oven. Due to the generation of dust, the chimney damper should remain open during
cleaning, but should be closed immediately after sweeping out. Now the oven is ready for baked goods.
The burnt wood and the hot stones provide the distinctive flavour for the baked and cooked goods.
Tip 2:
The ash should be removed completely from the oven cavity after each baking instance.
Otherwise, the wood-fired oven requires little or no servicing or maintenance.
Do not use cleaning tools in the event of soiling (brushes, chemical cleaning agents, etc.), this soiling will be burnt out
completely in the course of the next heating up.
This manual suits for next models
3
Table of contents
