Unical NOVAIREX Series, Инструкция по установке и обслуживанию

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11
Tec
hnical f
eatures
2.4 - MAIN COMPONENTS
2.5 - GENERAL
1. Panel board
2. Top cover
3. 2 side panels
4. Anti-smoke door
5. Wood storage door with refractory material and gasket
6. Primary and secondary air adjustment unit
7. Fan
8. Combustion chamber door with
refractory material, gasket, flame sight glass
9. Thick steel combustion chamber
10. Heat exchange fin
11. Boiler drain
12. Safety heat exchanger
13. Boiler body insulation in mineral wool
14. Steel boiler body
15. Burner built with refractory material with bars and grate
16. Smoke chamber
17. By pass
M Heating system flow
R Heating system return
N.B.: The fire bars and the refractory steel grate are subject to wear; it is therefore
advisable to carry out an annual inspection to prevent faulty boiler operation.
A BRIEF SUMMARY OF INVERTED
FLAME COMBUSTION
Everybody knows that to make a match last it must be held with
its head upwards. This is because in its convective motion, the
flame must not meet fuel other than that which has generated it.
As in residential heating the fuel is usually in the form of wood
logs which are loaded from the top, the flame has to go in the
opposite direction, i.e. downwards.
Natural draught is a source of negative pressure which varies
greatly depending on the type of chimney, on weather conditions,
on the type of fuel, etc.
Therefore it is necessary to integrate it with a forced ventilation
unit to stabilise its effects.
By fitting a fan it is possible to considerably reduce the section
of the gas ducts on the grate and furthermore there are no
problems with cold starts.
The small grate permits more controlled passage of combustion
air, contrarily to what happens with large traditional grates.
The air can be perfectly adjusted because the grate, covered
with burning wood, has the same crossing resistance and thus
combustion will always be optimal.
Unical has already used this principal for many years with the
Gasogen boiler.