50
Radijator Inženjering DOO, 36000 Kraljevo, Živojina Lazića Solunca br.6, Srbija
tel. +381 36 399 140, fax. +381 36 399 150,
, e-mail: [email protected]
On the smoke pipe, approximately 100mm from the flue outlet from boiler, a hole should be
drilled and a temperature gauge should be mounted for flue gas temperature measurings.
Without information about the temperature of flue gases there isn’t the automatic mode of the
boiler.
The chimney itself should be made of ceramic pipes, and around them there should be the
insulation of 3- 5cm thickness and the outer layer is of the bricks or special elements. If the
chimney is not from ceramic pipes but of bricks, the light opening area of such chimney shall
be 30 % higher than the surface of this ceramic pipes chimeny.
The chimney must have a door for cleaning and it must be well sealed. Chimney outlet on the
roof must be according to certain regulations. There are two cases: if the angle of the roof is
less than 12° and if the roof angle is bigger than 12 °. For angle less than 12 ° the height of the
chimney above the roof is 1 m and for the larger than 12 ° , then look at the sketch.
If you think that the chimney is too strong and too much cold air passes through the boiler, at
the exit of the boiler there is a valve which can reduce the flow of exhaust gases. The chimney
should be cleaned regularly or at least once a year
.
If the chimney is not of proper height, cross section, or if it is not enough clean as
possible, then the complications in the work of boiler are possible. First, of all it is
not possible to achieve the high temperature regime of work, i.e. there is not the
maximum operation power, and the consequence of that is the occurrence of
condensation which affects the life of the boiler.
Weak/poor chimney is the main reason when during the ignition of the boiler or
during the operation there is the appearance of smoke on the upper or lower door,
especially at higher fan speeds.
Figure 12.