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1.7 IMMERGAS FLUE SYSTEMS.
Immergas supplies various solutions separately
from the water heaters regarding the installation of
air intake terminals and flue extraction, which are
fundamental for water heater operation.
Attention: The water heater must only be installed
together with an original Immergas air intake and
flue gas exhaust system, in compliance with the
standards in force. This system can be identified
by an identification mark and special distinctive
marking bearing the note " not for condensing
boilers".
The flue exhaust pipes must not be in contact with
or be near to flammable materials. Moreover, they
must not pass through buildings or walls made of
flammable material.
• Positioning of double lip seals. For correct posi-
tioning of lip seals on elbows and extensions, follow
the assembly direction (Fig. 5).
• Coupling extension pipes and concentric
elbows. To install snap-fit extensions with
other elements of the flue extraction elements
assembly, follows:
duct length [m]
excluding the 90° outlet
type of exhaust
bend from the appliance.
Ref. fig. 7
up to 5
B22
from 5 to 10
from 10 to 23
up to 1
Type C
d.60/100
from 1 to 2.7
horizontal
from 2.7 to 5.7
up to 2
Type C
d.60/100
from 2 to 3.7
vertical
from 3.7 to 6.7
4+4
Type C
from 4+4 to 8+8
d.80
from 8+8 to 16+16
duct length [m]
excluding the 90° outlet
type of exhaust
bend from the appliance.
Ref. fig. 7
up to 4
B22
from 4 to 10
from 10 to 20
up to 1
Type C
d.60/100
from 1 to 1.9
horizontal
from 1.9 to 3.7
up to 2
Type C
d.60/100
from 2 to 2.9
vertical
from 2.9 to 4.7
4+4
Type C
from 4+4 to 8+8
d.80
from 8+8 to 14+14
Attention: if installation requires significant flue exhaust sections, it is necessary to consider the formation of condensate and thus use the "blue series"
insulated type of flue.
Fit the concentric pipe or elbow with the male
side (smooth) on the female section (with lip
seal) to the end stop on the previously installed
element. This will ensure sealing and joining of
the elements correctly.
Attention: if the exhaust terminal and/or
concentric extension pipe needs shortening,
consider that the internal duct must always
protrude by 5 mm with respect to the external
duct.
• N.B.: for safety purposes, do not obstruct the
water heater intake-exhaust terminal, even
temporarily.
• N.B.: when installing horizontal pipes, a min-
imum inclination towards the water either of
3% must be maintained and a section clamp
with plug must be installed every 3 metres.
• Diaphragm installation. For proper water
heater operation, a diaphragm must be installed
on the outlet of the sealed chamber and before
the exhaust pipe (Fig. 6).
N.B.: the diaphragm is supplied as per standard
with the water heater.
Caesar Eco 11
head loss of
flue gas
every additional
without diaphragm -
diaphragm
bend
[d. mm]
45°
90°
43
45
1.3 m 1.8 m
none
43
45
1 m
1.4 m
none
43
45
1 m
1.4 m
none
43
45
1.3 m 1.8 m
none
Caesar Eco 14
head loss of
flue gas
every additional
without diaphragm -
diaphragm
bend
[d. mm]
45°
90°
45
47
1.3 m 1.8 m
none
45
47
1 m
1.4 m
none
45
47
1 m
1.4 m
none
45
47
1.3 m 1.8 m
none
The head loss of the
90° bend coming
out from the appli-
ance must NOT be
calculated
With separate ducts having different lengths
with a 45 diam. diaphragm -
Air intake pipe length (m)
With separate ducts having different lengths
with a 45 diam. diaphragm -
Air intake pipe length (m)
8
5
6
7
Duct length/metres
Maximum completed length
with a 43 diam. diaphragm
with a 43 diam. diaphragm
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