Hergom ARANDA Instrucciones Para La Instalación, Uso Y Mantenimiento página 57

f) It is very important for the tube joints to be well sealed
to cover possible cracks that allow air to enter..
To check the chimney is airtight, proceed as follows:
- Block the hole on the roof.
- Introduce damp paper and straw into the chimney and light it.
- Check for possible cracks where the smoke escapes and seal
them.
Fig.-4
Fig.-5
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