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Figure 34
Installation of flue
set pieces
Figure 35
Hermetic combi
boiler concentric flue wall
output.
Figure 36
Condensing combi boiler flue training
During installation of horizontal pipes, the pipe
slope should be kept at 3% upwards as minimum
and at every 3 meter holder clamps should be
used with dowels.
A
3
o
A
Total length of hermetic flue set should not exceed 10
m with single elbow horizontally. Also, this total length
reduces by 1 m with every 90° elbows or two 45° elbows.
Maximum 3 pieces of 90° elbow can be used.
a- Standard Flue Set Elbow (90°)
b- Flue Extension Pipe
c- Additional 90° Elbow
d- Standard Flue Set Pipe
Figure 38
II. Two 90° elbow sample flue installations
d
a
b
c
a + b + c + d < 9 m.
Figure 37
I. Single 90° bended sample flue installation
(Ø60/100 mm) Lmax = 10 m
a
d
b
Figure 39
III. Single 90° and two 45° elbow sample flue
installations
d
f
e
b c
a
a + b + c + d + e + f < 9 m.
a- Standard Flue Set Elbow (90°)
b- Flue Extension Pipe (L1)
c- Additional 45° Elbow
d- Standard Flue Set Pipe (L2)
e- Additional 45° Elbow
f- Standard Flue Set Pipe (L3)
When it is required to shorten the discharge flue
and/or extension, consider that internal pipe
should protrude 5 mm when compared with the
external pipe.
For security purposes, combi boiler suction /
discharge flue should not blocked even
temporarily.
