Properly dimensioned and built chimney is the main condition for safe and economical functioning
of the boiler
. The thermal insulation of the chimney has to be done properly
, it has to be
absolutely gas-proof and smooth. On its lower part there has to be built in the opening for cleaning
with the door. An brick-layed chimney has to have three layers with an insulation of 30 mm in the
middle, if the chimney is built inside the house (i.e. inside the heated area), or an insulation of 50
mm if it is built outside the house (i.e. outside the heated area). The flue gas temperature has to be
at least 30°C higher then the temprerature of their consdensation point. The choice and the
construction of the chimney has to be performed by the authorized person. Inside dimensions of
the chimney intersection selected in accordance with diagram for chimney selection, they depend
of its height and of the capacity of the boiler and existing of cyclone with fan. The
flue gas tube for
connecting the boiler and the chimney has
to have a thermal insulation made out of 30-50 mm
thick stone wool. Flue gas tube must be installed under angle +0° to 45°. In order to unable
condensate to enter the boiler, the flue gas tube has to be situated 10 mm deaper inside the
chimney. If for any reason the boiler has to be connected to the chimney dimensioned for higher
capacity boilers, the possibility of condensation inside the chimney shall be highly inreased. The
boiler's function shall not be affected, but the damper on the flue exhaust has to be positioned
according to the chimney underpressure (see technical data regarding the chimney pressure for
each type of the boiler).
Diagram for chimney selection (for boiler without cyclone and fan)
5
10
15
20
25
230
500
550
140
180
320
430
6
270
50
45
40
35
30
Useful chimney height (m)
Boiler nominal output (kW)
- BOILER HEAT OUTPUT - 180 kW
- FUEL - WOOD PELLET
- REQUIRED USABLE CHIMNEY HEIGHT - H = 10 m
(or more if that laws require)
- REQUIRED CHIMNEY LIGHT DIAMETER - 30 cm
- Usable chimney height
- chimney height from connection spot of smoke pipe to
the chimney top.
- Light chimney diameter
- chimney inner diameter.
An example of selection of a chimney:
(for boiler without cyclone and fan)
CHIMNEY SELECTION FOR BOILER WITH CYCLONE AND FAN
CHIMNEY SELECTION FOR BOILER WITHOUT CYCLONE AND FAN
Required max. distance between boiler and chimney is 700 mm and minimal is 300 mm. Flue gas
tube must have inner diameter fi 300 mm for boiler power 140-320 kW and fi 350 mm for power
430 kW with max. two elbows.
Required max. distance between boiler and chimney is 5 m and minimal is 300 mm with max. four
elbows.
Boiler
140-230
280-320
430
499
560
Inner flue gas tube diameter
250 mm
300 mm
300 mm
300 mm
300 mm
Inner chimney diameter
300 mm
300 mm
350 mm
400 mm
400 mm
Usable chimney height
4,5 - 40 m
4,5 - 40 m
4,5 - 40 m
4,5 - 40 m
4,5 - 40 m
For existing chimneys with not offered dimensions or out of standard is necessary to make chimney
calculation by real conditions and determine correct dimensions of flue gas connection and
chimney.
6.0. CONNECTION TO THE CHIMNEY
2
Technical instructions
PelTec-Compact
18
Technical instructions
EKO-CKS P UNIT
