Hergom HERITAGE Libro De Instrucciones Para Instalación, Mantenimiento Y Uso página 34

It must be well fitted and separated from the chimney by at least its diameter.
Draught valve
 It is not generally necessary to fit a draught valve in a correct installation.
 Some installations, however, can benefit from a draught valve, such as tall chimneys that
can create stronger draught than normal.
 In any case, a draught valve may help to regulate the draught. A solid fuel appliance
requires a draught of between 1.5 and 2.5 mm.c.a. (see manufacturer specifications) (see
technical data, page 28)
 If the chimney draught is higher than this, it is best to install a draught valve.
 Draught valves must never completely shut of the smoke movement. A passage of at least
20 % must always remain free.
Linings, protectors, ...
 Respect the distances between stove fuel surfaces and the chimney conduct recommended
by the manufacturer.
 If this were not possible, defend these materials with suitable protectors.
 There are special protectors for installing in fuel walls when they pass close by or the
chimney manifold passes through them. Their mission is to protect the wall against fire.
 A wall protector must be installed when a chimney manifold is installed through a fuel wall or
near one and is likely to be damaged
 Wall passages protect the inside of the combustion wall. This piece must be used when the
chimney is connected through walls or ceilings.
Chimney Conduct
Chimneys for solid fuel appliancees must be built in bricks or prefabricated with materials that
withstand high temperatures.
Therefore, if you are going to build a chimney for your heating appliance, you have two alternatives:
a) Brick chimneys
b) Metal chimneys
There is not much difference concerning the output of the draught between masonry and metal.
Wherever possible, locate the chimney in the house for a better draught, to accumulate
less creosote and give it a longer life.
Do not install the appliance without making sure that the chimney is suitable for its use.
Before installing the appliance, examine the chimney for cracks, bad connections, rust, missing
cement or other signs of damage and obstruction.
Make sure the chimney is the right size for your appliance. Consult the dimensions
recommended by the manufacturer.
The use of a chimney that is too small or too large may prevent the heating appliance
from working properly, and thus contribute to the formation of creosote.
BRICK CHIMNEYS:
The advantages of these chimneys are as follow:
 The mass of bricks and/or slabs reduce the cooling of the smoke in the chimney.
 The bricks' heat - accumulating characteristic enables the house to be kept warm longer
once the fire has gone out.
 It may be built to a particular taste.
 If it is well built it is more heat resistant than the metal chimneys.
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