Connecting The Chimney; Some Standards - hergom SAJA 7 Instruction Book

They may be round, square, etc. What matters is their size.
For brickwork chimneys for the HERGÓM SAJA mod. cooker, the measurements
indicated in the chapter titled TECHNICAL DATA must be respected.
The advantages of metal chimneys are:
a) Easy installation.
b) Slight changes in chimney direction can be made, leading to greater
flexibility in the choice of location for the range cooker.
c) Due to there being curved elbow joint, sharp edges that make draught
difficult are removed.

4.- Connecting the chimney

When connecting the cooker to the chimney, elbow joints and long horizontal
sections must be avoided as they make the draught difficult and favour the formation of
creosote and soot.
Ensure that the connection is made at an upwards slant.
The chimney must be connected with a metal tube of ∅150 or ∅175 mm.,
according to whether it is connected to the cast iron attachment ring on the inside or on
the outside.
It is extremely important to seal the attachment ring – tube connection using
plaster, refractory filler or any other suitable material to prevent air from entering the area.
The joints of the tubes forming the chimney, in the event of using simple metal
tubes, must be sealed using refractory filler.
Each tube must fit into the next to prevent any creosote from reaching the outside.
This rule must be following whenever wood or coal fuel is used.

5.- Some standards

Below are other standards that must be respected when building the chimney:
a) Use resistant and non-combustible materials. Do not fit cement
asbestos tubes on the first 2-3 metres.
b)
Choose a route that is as vertical as possible. Do not connect various
appliances to the same chimney.
Fig.-2
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