Cola HELENA Installations-, Bedienungs- Und Wartungsanleitung Seite 27

The first connection section leaving the stove should be vertical, whereas the flue connection to the chimney (which
goes to the chimney cap) must only enter by a few cm, so as not to reduce the cross section of the flue.
If the flue is not perpendicular to the chimney it is advisable to make the connection with special steel fittings that
allow a maximum slope of 45°.
If the walls and ceiling are made of flammable materials, the parts in contact with the flue must be suitably
insulated. All connection joints must be carefully sealed, in particular where the connection enters the flue.
If there are several heating cook stoves in the same home, each must have its own flue.
It is inadvisable to make openings in the flue for connecting other appliances, as this could affect the draught.
According to Standard UNI 7429, the chimney cap must meet several requirements; above all, it must have a
useful outlet cross section at least double that of the flue. It is also advisable to install an "antiwind" cap that
guarantees fume exhaust even in the presence of strong crosswinds (figures
2.6 Emergency
Suitable fire-prevention devices should be arranged for any eventuality.
In case of a fire, proceed as follows:
- Immediately close the loading door and the ash pan.
- Close the combustion air controls.
- Extinguish the fire using suitable fire-extinguishers.
- Call the fire department immediately.
- Do not use jets of waters to extinguish the fire.
3 STOVE USE
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3.1 Introduction
Never leave children unsupervised in the vicinity of the stove; there is a very high risk of burns from the hot
surfaces.
Also:
- never use the stove with the fire door open;
- do not store firelighters or other easily combustible materials in the vicinity of the stove;
- do not try to move or lift the stove by the handles.
3.2 Startup
When lighting the stove the first time, bad odours may be created, therefore air the room thoroughly.
When lighting the stove the first time, allow it to burn with a low flame for several hours (air control on ash door
open 30%) and with very little fuel.
The heat can then be increased a little at a time, so that the stove expands slowly and the sealants and putties dry.
During the heating and cooling cycles, the combustion chamber in refractory cement undergoes heat stress and
expansion, which causes fine cracks to form. Such cracks do not affect stove efficiency or its service life.
3.3 Lighting and adding fuel
To light the stove, it is advisable to use kindling and newspaper, or commercially available firelighters (excluding all
inflammable liquids).
When lighting the stove, the air controls on the fire door must be fully open; after lighting, they are used to regulate
stove heat output. During this phase, it is also advisable to open the damper by moving the lever to position Z.
When the stove is hot, adjust the primary and secondary air and close the damper by moving the lever toposition A.
Never use petrol, alcohol or other flammable liquids to light the fire.
3.4 Adjusting the combustion air flow
Primary air:
the primary air is adjusted using the manual revolving controls located on the ash door, and feeds the fire through
the grate.
Secondary air:
the secondary air enters the stove through the holes in the back.
Optimum combustion conditions are obtained when, on loading wood, the air necessary for combustion enters
through the grate, whereas the secondary air ensures the completion of combustion in the upper part of the firebox.
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