Hergom ARANDA Instrucciones Para La Instalación, Uso Y Mantenimiento página 54

The form of installing the oven will decisively influence its safety and correct working
order. It is very important for it to be well installed.
To ensure a correct installation, we recommend it be done by a professional.
A.- CHIMNEYS.
The working order of the ovendepends on:
a) The chimney.
b) The form of operating with it
c) The quality of the fuel used.
After years of use, you may change the type of fuel, although once the chimney is installed
in a particular spot, it is not easy to modify it or change its place.
Therefore, the following information will help you decide whether you can make use of the
existing chimney or not, or whether to decide to build a new one.
This information will help you make the correct decision.
1.- How chimneys work
Basic knowledge of how chimneys work will help you to make the most of your oven.
The function of the chimney is:
a) To evacuate the smoke and gases safely to the outside of the house.
b) To provide enough draught in the fireplace for the fire to remain lit.
What is draught?
The tendency of the hot air to rise creates draught.
When the range cooker is lit, the hot air rises up the chimney and goes outside. The chimney
flue heats up and keeps the draught. Until the range cooker and the chimney are hot, the
draught will not work properly.
The location, size and height of the chimney affect its draught.
The following must be taken into account:
- Chimneys located inside the home keep warm and, therefore, the draught is greater.
- The chimney size recommended by the manufacturer maintains a good draught.
- The height of the chimney affects the draught:
The chimney must stand out by at least one metre above the highest part of the roof.
Other factors affect the draught:
- Houses with extremely good indoor insulation, without air currents: with no air
entering the stove, the draught is affected. This is corrected by sending air from outside to
the range cooker.
- Trees and/or tall buildings close to the home hinder the draught.
- The wind speed. Generally, persistently strong winds increase the draught, although
stormy winds may decrease the draught.
- Outside temperature. The colder it is outdoors, the better the draught.
- Barometric pressure. On rainy, humid or stormy days, the draught is generally weak.
- Liveliness of the fire. The hotter the fire, the stronger the draught.
- Cracks in the chimney, badly sealed or dirty doors, air inlets through the tube joints,
other appliances connected to the chimney, etc. may produce unsuitable draughts.
II.- INSTALLATIÓN
greater height  better draught
54