Chimney Cap ; Hot Air Ducting - Anselmo Cola AFRODITE Manual De Instalación, Uso Y Mantenimiento

- it must be at a suitable distance from flammable materials with insulation or air gap;
- it must preferably have a constant, free and independent round internal section;
- it is advisable for the flue to have an inspectionable chamber for the collection of solid materials
- and any condensate, placed under the beginning of the fume duct.
FLUE CONNECTION or DUCT: duct or connection element between the unit and flue for evacuation of fumes.
DUCT technical requirements: - it must not cross rooms in which the installation of combustion units is not allowed;
- flexible metal tubes or fibre cement pipes are prohibited;
- the use of counter-sloping elements is prohibited;
- horizontal sections must have an upward slope of at least 3°;
- the length of the horizontal section must be minimal and not more than 3 m;
- there must not be more than 3 changes of direction, without the T union;
- with change of direction > 90° a max. of 2 bends can be used with length in horizontal projection not exceeding 2 m.
- the fume duct must have a constant section and allow the recovery of soot.
CHIMNEY CAP : a device placed on the top of the flue to facilitate the dispersion of fumes into the atmosphere.
CHIMNEY CAP technical requirements : it must have a section equivalent to that of the flue;
- it must have a useful section not less than double the internal section of the flue;
- it must prevent the entry of rain and foreign bodies and ensure the discharge of fumes in any
atmospheric condition;
- it must ensure an adequate dilution of fumes and be positioned outside the backflow area;
- it must be without mechanical means of suction.
The direct discharge of fumes must take place on the roof and not towards closed spaces
( even open air ).
2.5 Brazier and baffle position check
Before lighting the stove make sure the brazier is in the correct position, i.e. fitted in the special slots. Also make
sure the top smoke baffle is properly fitted. A wrongly positioned baffle can result in malfunctioning and excessive
blackening of the glass.
At every stove lighting, check the correct position of the brazier on the brazier holder.

2.6 Hot air ducting

The ductable SPRINT model has a top connection of external diam. 80 mm for ducting the flow of hot air generated
by the centrifugal fan inside the stove in heat exchange with the combustion chamber walls; this connection can be
turned 90° or 180° to direct the flow on the upper or lower part of the rear wall as required.
To create the ducting system:
- use pipes with a minimum internal diam. of 80 mm able to resist temperatures of at least 150°C;
- use pipes that are smooth inside, insulated or isolated;
- reduce, as far as possible, the ducting path and the single pipe section must not be longer than 7 m;
- avoid constrictions or section reductions, tight bends and downsloping sections.
The diagrams below have been obtained at the manufacturer's lab through real tests under following conditions:
room temperature 20°C;
stove at operating speed 5, fans at 5;
ventilation ducts wit 2 curves + linear sections isolated and non isolated.
A – hot air flow from front grille in room;
B – system hot air flow from top grille in room;
C – ducted hot air flow;
a – ducting external thermostat C;
b – stove external room thermostat;
39 AFRODITE