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INSTALLATION
Exhaust Ø 300 mm
Maximum
Pressure drop
Model
length
45° bend
90° bend
Ø 300 mm
270-2 P/V
30 m
2 m
405-3 P/V
30 m
2 m
540-4 P/V
30 m
2 m
The table with available residual discharge heads is shown be-
low.
Discharge head
Description
Max
Min
114-2 P/V
510
35
140-2 P/V
630
35
180-2 P/V
560
32
230-2 P/V
500
30
270-2 P/V
353
28
300-3 P/V
610
32
345-3 P/V
500
30
405-3 P/V
353
28
460-4 P/V
500
30
540-4 P/V
353
28
The residual discharge head values are shown in Pascal.
SC
i > 3°
To change direction, use a T section with an inspection cap to
permit easy access for cleaning inside the pipe. After cleaning,
always make sure that inspection caps are replaced tightly and
that their seals are undamaged and efficient.
2.9.1
Preparation for the condensate drain
The condensate coming out of the drainer must be collected for
dripping into a taped vessel connected to the sewer system, if
necessary by interposing a neutralizer (for more information see
4 m
paragraph "Neutralization of the condensate"), according to the
4 m
following procedure:
4 m
− Fit a drip tray near the condensate discharge outlet, add-
ing a condensate neutraliser if necessary
− Connect the drip collection receptacle to the local drain or
sewer system using a siphon.
The drip tray can be created by fitting a cup or simply a polypro-
pylene bend, suitable for collecting the condensate that comes
out of the appliance and any liquid leaking from the safety valve.
The maximum distance between the condensate drainage of
the appliance and the socket (or socket pipe) must not be less
than 10 mm.
The connection to the local drain or sewer system must be ex-
ecuted using a siphon in order to prevent unpleasant odours
from being released back into the room from the sewer.
We advise using plastic (PP) piping for building the condensate
drainage.
0
Never use copper pipes under any circumstances, as the
condensate itself will cause them to rapidly deteriorate.
9
Execute the condensate drain outlet so as to prevent com-
bustion gases leaking into the environment or the drain or
sewage system by sizing the siphon (height H) as described
in Paragraph "Discharge of combustion products".
9
Always maintain a slope angle "s" of over 3° and ensure
that the diameter of any condensate drain pipe is greater
than that of the connection fitted at the drain outlet
9
Connect the condensate drain hose to a domestic water
drain in accordance with national and local legislation and
standards.
9
Fill the siphon with water before activating on the thermal
module in order not to release any combustion products
into the environment when the thermal module is first
switched on.
9
It is recommended that condensate from the thermal mod-
ule and from the flue should be channelled to the same
drain pipe.
9
The connection pipes used must be as short and as straight
as possible. Any curves or sharp bends can lead to hoses
becoming clogged and, therefore, can prevent proper con-
densate discharge
9
Size the condensate drain outlet so as to ensure the proper
drainage of waste liquids without leaks
9
The condensate drain must be connected to the drain and
sewage network in such a ways so that the condensate may
not freeze under any circumstances
40
2.10 Neutralization of the condensate
To correctly eliminate the combustion condensate, check if the
condensate needs to be neutralized using a designated acces-
sory.
− For systems with a nominal heat input greater than 200
kW, the condensate always needs to be neutralized
− For systems with a nominal heat input greater than 35
kW but less than 200 kW, the selection and evaluation
criteria is provided in the figure below
Number of apartments
Number of occupants
10
100
9
90
8
80
7
70
Neutralization not
6
60
required
Example 2
5
50
Example 1
4
40
3
30
Neutralization
2
20
required
1
10
0
0
0
35
50
75
100
125
150
175
200
Generator power in kW
Example 1
For a residential building with 4 apartments, a 75 kW condens-
ing boiler needs to be installed. The 4 apartments / 75 kW inter-
section point is within the range "neutralization not required",
therefore the condensate does not need to be neutralized.
Example 2
For an office block with 45 users, a 160 kW condensing boiler
needs to be installed. The 45 users / 160 kW intersection point is
within the range "neutralization required", therefore the con-
densate needs to be neutralized.
In the case of residential applications, reference must be made
to the number of apartments served by the system, while in the
case of non-residential applications, reference must be made to
the number of users.
In the case of mixed applications, the number of apartments
must be converted into equivalent users, or conversely, accord-
ing to the alignment of the two vertical axes, therefore refer only
to one axis (for example, 2 apartments equate to 20 users).
9
The condensate drainage system must be sized and installed
to ensure correct elimination of the effluents produced by
the appliance and/or by the evacuation system of the com-
bustion products in any and all operating conditions.
INSTALLATION
2.10.1
Water quality requirements
It is ABSOLUTELY NECESSARY to treat the water system in order for
the heat generator to work properly and to guarantee its service
life, as well as that of all its components. This not only applies
to jobs carried out on existing installations but also on new in-
stallations.
Sludge, lime-scale and pollutants contained in the water can
cause permanent damage to the heat generator, also within a
short time and notwithstanding the quality standards of the
materials used.
Contact the Technical Assistance Service for any further informa-
tion on type and use of additives.
The heat transfer fluid (water) for the central heating circuit must
conform to the quality parameters given in the following table:
Parameters
Value
Unit
General
Colourless, without
characteristic
sediment
PH value
Min. 6.5; Max. 8
PH
Dissolved oxygen
< 0,05
mg/l
Total iron (Fe)
< 0,3
mg/l
Total copper (Cu)
< 0,1
mg/l
Na2SO3
< 10
mg/l
N2H4
< 3
mg/l
PO4
< 15
mg/l
CaCO3
Min. 50 ; Max.150
ppm
Trisodium
None
ppm
phosphate
Chlorine
< 100
ppm
Electrical
<200
microsiemens/cm
conductivity
Pressure
Min. 0.6; Max. 6
bar
Max. 40% (only
Glycol
%
propylene glycol)
9
All data in the table refer to water contained in the system
after 8 weeks' operation.
9
Do not use excessively softened water. Excessive water sof-
tening (total hardness < 5° f) results in corrosion due to con-
tact with metal elements (pipes or thermal module com-
ponents)
9
Immediately repair any leaks or drips that could result in air
entering the system
9
Excessive pressure fluctuations can cause stress and fatigue
to the heat exchanger. Keep the operating pressure con-
stant.
9
Water used to fill a system for the first time and water used
to top it up must always be filtered (using synthetic or metal
mesh filters with a filtration rating of no less than 50 mi-
crons) to prevent sludge from forming and triggering de-
posit corrosion.
9
If oxygen enters a circuit continuously or even intermittently
(e.g. in under-floor heating systems whose pipes are not
protected by impermeable synthetic sheaths, in circuits with
open expansion vessels, or in circuits that require frequent
top-ups) always separate the boiler's water circuit from the
central heating circuit.
To sum up, in order to eliminate contact between air and water
(and to prevent the latter from becoming oxidized), it is neces-
sary:
− that the expansion system be a closed vessel, correctly
sized and with the correct pre-loading pressure (to be
regularly checked);
41
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