Fresh Air Supply; Connecting To A Steel Chimney - Morso 5400 Instructions For Installation And Use Manual

1.8 Connecting to a steel chimney

If your installation involves routing the chimney straight up through the ceiling, it must com-
ply with national and local regulations concerning the distance of the chimney from flamma-
ble ceiling material. The chimney must be sealed at the smoke outlet using the glass tape pro-
vided. It is important to install the chimney with a roof support so that the stove does not bear
the weight of the chimney. (See the chimney manufacturer's instructions). Heavy weights on
the stove's top plate may cause it to crack. The Morsø warranty does not cover the top plate if
the chimney is installed without a roof support.
If a chimney fire should occur as a result of incorrect operation of the stove or prolonged use
of wet fuel, close the vents completely and contact the fire brigade.
Be aware of the following:
Discuss the cleaning options with your chimney sweep.
If there is insufficient draught in the chimney, it may be a good idea to install the
flue pipe straight up so as to minimise smoke migration in the actual combustion
chamber.
Avoid having more bends than necessary, and limit the length of the flue pipe so as
not to reduce the draught.

Fresh air supply

A wood-burning stove requires air for combustion. As a result, firing a
wood-burning stove will help create a healthy climate in your house. If the house is
very tightly sealed, and particularly if there is a cooker hood or ventilation system
in the house, it may be necessary to install an air grate in the room in which the
wood-burning stove is installed. Otherwise there may not be enough draught in the
chimney, which may result in the stove not being able to burn properly, and smoke
may come out of the stove when the fire door is opened.
If it is necessary to install air grates, they must be positioned so that they cannot be
obstructed.
1.9 Draught
If smoke comes out of the stove when the fire door is opened, it will be due to the poor draught
in the chimney. This type of stove requires at least 12 PA of chimney draught to achieve satis-
factory combustion and to prevent smoke from escaping. Smoke may, however, escape in any
event if the stove door is opened during vigorous firing, so this should be avoided.
The flue gas temperature at the rated output is 249°C relative to 20°C.
If in doubt, you may want to get your chimney sweep to measure the draught in the chimney.
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