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With the lower register, the passage of primary air in the lower part of the cooker is regulated through the ash drawer and the grill in the
direction of the fuel. The primary air is necessary for the combustion process. The ash drawer must be emptied regularly, so that the ash
cannot block the primary air intake for combustion. The primary air also keeps the flame alive.
The primary air register must be open a little during wood combustion, as otherwise the wood burns too quickly and the thermocooker may
overheat.
SECONDARY Air Register
(upper knob on the furnace door
pos.
B
).
This knob must be open (i.e. turned completely to the right), in particular for the combustion of wood (see paragraph
). The secondary
air, passing between the double glass of the fire door, heats up and triggers the dual combustion, keeping the glass clean at the same time
(register open).
AUTOMATIC Thermostat
(placed in the upper right-hand part of the back
pos.
C
)
The thermostat has the task of automatically increasing or decreasing combustion.
Dependent on the position chosen, the thermostat will act on the valve which regulates the intake of air into the furnace, placed on the
back of the cooker. Turn it in a clockwise direction from 0 to 5 to make up the fire and in an anti-clockwise direction to reduce combustion.
As this is an extremely precise device, it is advisable to turn it carefully and never force the knob.
FLUE GAS Register
Pos.
D
)
(Conversion from the cooker
HOTPLATE USE
–
OVEN USE
function to the cooker
HEATING
function)
In the central part of the instrument panel, there is the flue gas register, which can be recognised from its enamelled, labelled knob.
When the register is positioned to the
LEFT
(on the pan symbol), the combustion gases flow above and around the oven (oven function
–
HOTPLATE USE – OVEN USE
); when positioned to the
RIGHT
(on the water symbol), the gases flow near the boiler, increasing the
temperature evenly, favouring water heating inside it (cooker function
HEATING USE
).
IGNITION Register
(
pos.
E
).
On the front of the cooker, between the protective handrail and the flue gas register, there is the ignition register control lever, which can
be recognised by a chrome-plated knob.
This register must
only
be used to facilitate the ignition of fuel in the cooker. Pull the lever outwards from the cooker (register open).
IMPORTANT
: during normal cooker operation, the register lever must remain completely inserted (pushed inwards on the cooker). In this
way avoiding excessive fuel consumption and poor thermocooker output (register closed).
6. FLUE
Essential requirements for correct appliance operation:
• the internal section must preferably be circular;
• the appliance must be thermally insulated and impermeable and built with suitable materials which are resistant to heat, combustion
products and any condensation;
• there must be no narrowing and vertical passages with deviations must not be greater than 45°;
• if already used, it must be clean;
• the technical data from the instruction manual must be respected;
If the flues are of a square or rectangular section, the internal edges must be rounded with a radius of not less than 20 mm.
For the rectangular section, the maximum ratio between the sides must be ≤ 1.5.
A section which is too small causes a reduction in draught. A minimum height of 4 m is advisable.
The following materials are
FORBIDDEN
and compromise the good operation of the appliance: asbestos cement, galvanised steel, rough
and porous internal surfaces.
The minimum section must be 4 dm
2
(for example 20x20 cm) for appliances whose pipe dimensions are less than 200 mm, or 6.25
dm
2
(for example 25x25 cm) for appliances with a diameter of more than 200 mm
.
The draught created by your flue must be sufficient but not excessive.
A section of the flue which is too large can present a volume which is too large to heat and therefore cause operating difficulties for the
appliance; to avoid this, it is necessary to intubate the appliance for its entire height. A section which is too small causes a reduction in
draught.
The flue must be at a suitably distance from flammable or combustible material using suitable insulation or an air space.
It is FORBIDDEN to pass system piping or air ducts inside the flue. It is also forbidden to create moveable or fixed openings on the flue
itself, for the connection of further different appliances.
6.1. CHIMNEY POT
The flue draught depends on the suitability of the chimney pot.
It is therefore essential that, if built in a handcrafted way, the exit section is more than twice the internal section of the flue (
).
As it must always go past the ridge of the roof, the chimney pot must ensure exhaust even in the presence of wind(
).
The chimney pot must meet the following requirements:
• have an internal section equivalent to that of the chimney.
• have a useful exit section of double the internal section of the flue.
• be built so as to prevent rain, snow or any foreign body entering the flue.
• be easy to inspect, for any maintenance and cleaning operations.
6.2. CONNECTION TO THE CHIMNEY
Products with automatic door closing (type 1) must operate, for safety reasons, with the furnace door closed (except during the fuel loading
