Note that boiler operation is affected also with connection of boiler exhaust breeching with the flue
liner– for reference connection consult Figure No. 21. Connection must ensure tightness and
prevent accumulation or flow of condensate down to the boiler. Chimney connection length shall
not be over 3m, with minimum 10º gradient towards the boiler, whereas optimal gradient is 30º ÷
45º. Non-flammable thermal insulation min. 25mm thick is recommended along the whole
connection. Before operation firstly the chimney shall undergo drying and heating.
Chimney draft during operation of Smart Fire SF11, SF15 and SF22 boiler shall never be
over 10Pa! In case of Smart Fire SF31 and SF41 boiler chimney draft shall not be over 20Pa!
To ensure proper chimney draft the connection must be provided with flue damper and the flue liner
with the draft controller installed below the connection of chimney and flue liner.
Chimney connected to the boiler shall comply with all applicable standards– in particular PN
-EN 13384-1, safety requirements and good building practice! If required the chimney shall
undergo inspection acceptance performed by competent authorities!
Model
SF 11
SF 15 / SF 22
SF31 / SF 41
Min, chimney draft
1 Pa / 0.01 mbar
1 Pa / 0.01 mbar
5 Pa / 0.05 mbar
Max. chimney draft
8 Pa / 0.08 mbar
8 Pa / 0.08 mbar
15 Pa / 0.15 mbar
Recommended
chimney dia.
Ø100 mm ÷ Ø110 mm
Ø120 mm ÷ Ø130 mm
Ø160 mm
Chimney max. Dia.
Ø200 mm
Ø200 mm
Ø200 mm
Table No. 11 Guidelines regarding chimney flue system
Figure No. 21 Smart Fire boiler chimney flue connection
SMART FIRE BOILER User Manual
Page 42/55
Draft
controller
Flue
damper
Thermal
insulation
Exhaust
breeching
T-connector
Washout
hole
Bottom
with outlet