Immergas Flue Systems - Immergas Caesar 14 4 ERP Instruction And Recomendation Booklet

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 in-
stalled together with an original Immergas air
intake and flue gas exhaust system, in compli-
ance 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.
• Resistance factors and equivalent lengths. Each
flue component has a Resistance Factor based
on experimental tests and specified in the table
below. The resistance factor for individual com-
ponents is independent from the type of water
heater on which it is installed or the actual
dimensions. It is however, conditioned by the
temperature of the fluids that pass through the
pipe and therefore, varies according to applica-
tions for air intake or flue exhaust. Each single
component has a resistance corresponding to
a certain length in metres of pipe of the same
diameter; the so-called equivalent length, can
be obtained from the ratio between the relative
Resistance Factors. All water heaters have an
experimentally obtainable maximum Resistance
Factor equal to 100. The maximum Resistance
Factor allowed corresponds to the resistance
encountered with the maximum allowed pipe
length for each type of Terminal Kit. This
information allows calculations to be made to
verify the possibility of setting up various flue
configurations.
• Positioning of double lip seals. For correct
positioning of lip seals on elbows and exten-
sions, follow the direction of assembly given
in figure (Fig. 1-4).
• Coupling extension pipes and concentric
elbows. To install push-fitting extensions with
other elements of the flue, proceed as follows:
Install the concentric pipe or elbow with the
male side (smooth) on the female side (with lip
seal) to the end stop on the previously installed
element in order to ensure sealing efficiency of
the coupling.
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 mini-
mum inclination towards the water either of 3%
must be maintained and a section clip with pin
must be installed every 3 metres.
• Diaphragm installation. For correct function-
ing of the water heater, a Ø 45 diaphragm must
be installed on the outlet of the sealed chamber
and before the intake and exhaust pipe for the
"Caesar 14 4 ErP" model and a diaphragm of Ø
46 for the "Super Caesar 17 4 ErP" model (Fig.
1-5).
N.B.: the diaphragm is supplied as per standard
with the water heater.
Caesar 14 4 ErP discharge diaphragm.
Extension in meters
Diaphragm
Ø 60/100 horizontal pipe
Ø 45 From 0 to 1
NONE Exceeding 1
Pipe extension in metres Ø
Diaphragm
60/100 vertical
Ø 45 From 0 to 2.7
NONE Exceeding 2.7
*Extension in metres
vertical pipe Ø 80
Diaphragm
without bends
Ø 45 From 0 to 25
NONE Exceeding 25
*Extension in metres of the
Ø 80 horizontal pipe with
Diaphragm
two bends
Ø 45 From 0 to 20
NONE Exceeding 20
* The values for maximum length are considered
with 1 metre of exhaust pipe and the remaining
on intake.
8
Super Caesar 17 4 ErP discharge diaphragm.
Extension in meters
Diaphragm
Ø 60/100 horizontal pipe
Ø 46 From 0 to 1
NONE Exceeding 1
Pipe extension in metres Ø
Diaphragm
60/100 vertical
Ø 46 From 0 to 2.2
NONE Exceeding 2.2
*Extension in metres
vertical pipe Ø 80
Diaphragm
without bends
Ø 46 From 0 to 22
NONE Exceeding 22
*Extension in metres
horizontal pipe Ø 80 with
Diaphragm
two bends
Ø 46 From 0 to 17
NONE Exceeding 17
* The values for maximum length are considered
with 1 metre of exhaust pipe and the remaining
on intake.
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