Valoriani for private use

With good professional insulation, Valoriani furnaces lose about 10°C per hour. This means that if the furnace is closed in the evening, for example, it still has an effective residual heat that can be used the next day.

The dome parts are only filled on the outside and a normal fireclay mortar can be used, the dome parts are only dry assembled and filled on the outside.

The smoke pipe should be at least 2- 3 meters high to get a good draft. For the diameter the ideal dimension is 180-200mm, for lengths over 4m a pipe in 150mm should be sufficient, depending on weather, wood and other factors. A single wall pipe is sufficient, double wall pipes are only relevant for close combustibles or roof penetrations.

First of all, we would like to say that the heat loss is very equal with good insulation, and the door is used only when baking bread, that is, after removing the embers. Otherwise, the oven is always up and the door is hardly needed. Model "FVR" is available only with pre-set door and model "TOP" is available only with fixed ceramic door. It is not possible to change them, because they are two different models and it does not fit dimensionally. The model "Indirect" is also available only in one version.

When the door is closed, fresh air does not enter the oven, nor can exhaust gases escape. We recommend closing the door only for baking bread, e.g. without embers, only because of the residual or radiant heat. For traditional pizza baking, the oven is not closed.

The gaps on the dome furnaces may become somewhat larger or wider over time, but they are harmless. Due to the applied insulation of the dome, the escape of the temperature and also the escape of the flue gases is not possible. The material expands at high temperatures and then contracts. It may be that the dome was not held 100% on the outside of the sides and the gap was caused by this. However, I assume that this will not increase in size in the next few years. Further spackling in the dome (inside) is not necessary and would also loosen over time. You can continue to use the furnace as before without any worries.

The special feature of this model is that you can start baking directly. However, the first 2-3 baking activities should be fired slowly to ensure that any residual moisture can escape and no cracks appear on the oven. We recommend using only 2-3 logs at first and preheating to a maximum of 150°-200°C. The baking time for the pizza is then about 10 minutes. After that, it is ideal to heat the oven for at least 1 to 1.5 hours to approx. 280° - 300°C (according to the thermometer). If you want to bake directly on the fireclay, the embers should be pushed back to the last third after firing, so that the bottom temperature does not become too extremely hot. If you are baking on trays this is not necessary as they will take some of the temperature away. Every 15-20 minutes, 1 or 2 small pieces of wood should be added so that the oven settles at about 250°C. After inserting the pizza, the baking chamber should be closed again so that there is no high heat loss. Thin pizzas and not so much topping are ideal, then you have directly on the bottom a baking time of about 3-5 min. If you want to bake bread in the 2nd cycle, please remove the embers completely and leave the oven open for 10 minutes so that some heat escapes. Then insert bread and close the baking chamber for about 30-40 min.

The following connection is on the furnace to use a normal pressure reducer:

• ½ inch female thread x ¼ inch male thread (left).
• To connect a ½ inch male thread to a standard propane gas hose (¼ inch union nut), e.g. outdoor gas stove, camping stove, etc.
• for indoor and outdoor appliances.
• material: brass.
• with gasket.

Yes, you can paint the spots. First, please sand the place a little and then cover with heat-resistant stove paint (varnish or spray). The paint is available at the hardware store.

It can be assumed that the fireclay bricks have drawn moisture if the furnace has not been in operation for a long time and it has also rained frequently. In this case, we recommend heating the furnace at least 2 more times for at least 3 hours to achieve drying of the fireclay bricks. Then everything should work as usual.

It is important that the floor is insulated so that the heat is lost as slowly as possible, so that no stresses are created and as much heat as possible is used for baking. We recommend a 10 cm thick calcium silicate or refractory gas concrete layer as a base. These can be glued to a concrete slab with tile adhesive or laid floating in a border.

The radius of the bottom is always about 2 cm smaller than the outer dimensions of the dome, so that the bottom can be changed (if necessary) and the bricks have a chance to expand. The fireclay has a higher expansion than the dome parts and should not press against the dome. Normally, this gap remains open and becomes clogged with ash etc. over time. Purely visually, it can be grouted with mortar in the front area or optionally filled with sand.

When the oven is insulated, it can be put into operation slowly and should be fired slowly for 2-3 days at a time with only 2-3 sheaths of wood, so that the moisture can escape. After the fire is out, close the baking chamber with the flap. After that the oven is ready for use!

After the ceramic fiber is applied to dome optics metal mesh / rabbit wire or similar and plastered with lime-cement plaster. The fireclay mortar (10 kg) is used only for filling the joints on the outside, the smoke connection or leveling the floor tiles and is therefore sufficient.

The FVR series is also available in 80/100/120 cm diameter as an already assembled version with a round dome shape. They are delivered free to the curb. The transport to the place of installation is to be to be organized on site. Please make sure that the outer dimension of the stoves is about 40cm larger than the inner dimension. The ovens because of between 500 to 700 kg. The Hobby series has a substructure under the floor insulation and it is sufficient if this sits on the right/left and back, so it is self-supporting to a certain extent metal substructure is also available as an accessory.

If you only want to plaster the stove, we recommend 2 rolls of ceramic fiber (about 3/4 layers) for a size of 120 cm or more in diameter. If it is going to be walled, usually one roll of ceramic fiber plus the associated vermiculite, which provides a very high second insulation.

No, let the ceramic fiber dry and then you can process it accordingly.

Use a lime-cement plaster and apply it 4-5 cm thick. Thus, cracking can be used. Due to the ceramic fiber furnace is already excellent insulation.