Manual Ravelli EVA VISION (page 17 of 76) (English, German, Danish, French, Italian, Spanish)

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The manufacturer declines all direct civil or criminal responsibility due to:

•

poor maintenance

•

failure to observe the instructions in the manual

•

use not compliant with the safety instructions

• installation that is not compliant with the regulations in force in the country.

•

installation by personnel who are not qualified or authorized

•

modifications and repairs that are not authorized by the manufacturer

•

use of spare parts that are not original

•

exceptional events

3.2 Spare parts

Use original spare parts only. Do not wait for the components to be worn

before replacing them. Replace a worn component before it is completely

broken to prevent any accidents caused by the sudden breakage of

components, perform the periodic maintenance checks as described in

the dedicated chapter.

3.3. Majolica finishes

The cast majolica stoves with a special hand finish may cause

surface imperfections such as shadowing and details that make every

majolica one of its kind. As it is a delicate material, please handle with

care whilst cleaning and avoid blows as sudden breakage may occur.

Please also take care when loading the hopper (Ed.’s note; tank containing

the pellets) with the sack of pellets: do not place it on the stove!

3.4. What are the wood pellets

The wood pellets are made from sawdust and wood shavings produced in

joiners’ shops. The material used cannot contain any foreign substance

such as glue, varnish or synthetic substances.

Subjecting it to high pressure, the wood is pressed through a plate with

holes and due to the high pressure the sawdust is heated activating the

natural binders of the wood. Thus, the pellets keep their shape even

without the addition of bonding substances. The density of the wood pellet

varies according to the type of wood and can be 1.5 – twice greater than

that of natural wood. The diameter of the cylindrical rods is 6-10 mm and

their length can vary between 10 and 50 mm.

Their weight is equal to about 650 kg/m. Due to the low content of water

(8-10%) they have a high energy content.

The standards DIN 51731 define the quality of the pellets:

Length:

10-30 mm approx.

Residual humidity: 6-12% approx.

Diameter:

6 – 10 mm approx.

Ashes: <1.5%

Real weight:

650 kg/m

approx.

Specific weight: >1.0 kg/d

Calorific power:

4.9 kWh/kg approx.

Do not put the bag of pellets on the ceramic

parts during the loading operations.

The pellets must be transported and stored in a dry place. They swell on

contact with damp, and cannot be used, They must always be protected

from the damp both during transport and in storage.

Ravelli recommends using a pellet with a diameter of 6 mm for the

stove. Otherwise it will be necessary to ask the assistance centre for

the appropriate regulations.

3.5. The components of the stove

This drawing shows the internal parts of a pellet stove.

By filling the tank (7), the pellets are loaded into the fire pot (3) through

the loading screw (1).

Ignition is by means of the resistance (2), which overheats the air from

the special entrance (5) which on contact with the pellets will allow the

development of the flame. At this point the exhaust smoke is deviated to-

wards the stainless steel exchanger (6) and through the smoke extraction

tube (4) it is released into the flue, through the connection with the smoke

exhaust pipe. (9).

3.6. The combustion

The combustion is simply a chemical reaction between combustible and

carburant. The result of this reaction is the heat.

The three elements that are required for the combustion are:

•

Combustible (pellet)

•

Carburant (oxygen available in the air)

•

Ignition (electrical resistance for ignition)

To get the combustion, the combustible and the carburant must be avail-

able in a correct proportion.

The reaction between combustible and carburant is made by an external

starter. The start can be made by the hot reaction or by a sparkle.

The combustion is NOT CORRECT, the flame is too tight with too much

incandescent pellet in the firepot. Adjust the Set pellet/air reducing the air

percentage (from 0 up to -5); in the vent this is not enough to get a proper

flame, increase the loading quantity of the pellet (from 0 up to +5) to reach

the flame condition shown in picture 3.

The combustion is NOT CORRECT, the flame is

weak and a lot of unburned pellet wood into the

firepot. Check first that the ash pan is properly

closed. Then adjust set pellet/air increasing the air

percentage (from 0 up to +5); in the event this is

not enough, increase the loading quantity of the

pellet (from 0 up to -5) to reach the flame condition

shown in picture 3. If with the adjustments done,

the flame is not reaching the condition shown in

picture 3, contact After Sales Service.

Fig. 1

The combustion is NOT CORRECT,

the flame

is weak and a lot of unburned pellet wood into the

firepot. Check first that the ash pan is properly

closed. Then adjust set pellet/air increasing the air

percentage (from 0 up to +5); in the event this is

not enough, increase the loading quantity of the

pellet (from 0 up to -5) to reach the flame condi-

tion shown in picture 3. If with the adjustments

done, the flame is not reaching the condition

shown in picture 3, contact After Sales Service.

Fig. 2

The combustion IS CORRECT,

full flame yel-

low/white and minimum quantity of pellet in the

firepot.

The combustion if fine and no ad.

The picture 3 show a flame done with a stove

working at power P5.

Fig. 3

4. SAFETY DEVICES

The oven is fitted with sophisticated safety systems so that, in the case of

breakage of one of the individual parts or defects in the flue, no damage

will be caused to the stove and the room in which it is installed. In any

case, when a problem arises, the pellets stop falling immediately and the

switch off phase is activated.

The corresponding alarm will be shown on the display. The details can be

seen in the chapter on the alarms.

5. TECHNICAL FEATURES

All Ravelli products are manufactured according to the following direc-

tives:

• 89/106 EEC

construction materials

• 73/23 EEC

electrical safety

• 2006/42/EEC

machines

• 2004/108 EEC

electromagnetic compatibility

And according to the following standards:

• EN 14785

• EN 60335-1 EN 50165

• EN 292 EN 294 EN 349

• EN 55014.1 EN 61000-3-2 EN 61000-3-3

• EN 55014.2

1. pellet loading screw

2. resistance unit for ignition

3. combustion ﬁ re pot

4. tube for passage of smoke

5. air intake tube

6. stainless steel exchanger

7. pellet hopper

8. ﬂ ame trap

9. smoke exhaust tube

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Ravelli EVA VISION Manual

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