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2
INSTALLATION
IT
GB
Installation must be secure and has to
be exclusively undertaken by a qualified
specialist who will comply with all the
FR
instructions contained in this manual.
Moreover installation must be in com-
BE
pliance with all the current regulations.
DE
2. 1
BOILER ROOM
ES
AND VENTILATION
The 'EKO 3/4 OF – 3/4 OF PVA' boi-
lers, as they do not exceed the limit of
35 kW, can be installed in domestic set-
tings a mere replacement or other
appropriate technical premises.
The rooms in which the gas app ratus is
installed must be ventilated accordingly.
There has to be a sufficient flow of air
equal to the quantity of the gas consu-
med by the apparatus during a regular
combustion.
It is necessary to operate openings in
the external walls, in order for sufficient
air circulation. These openings must
meet the following requirements:
- Leave an open division of at least 6
2
cm
but never more than 100 cm
for each kW of the installed thermal
capacity.
- Such openings have to be as close as
possible t o gr ound level, without
obstruction and protected with a gra-
ting which does not reduce the effecti-
veness of the air circulation.
On the contrary the 'EKO 5/12 OF' boi-
lers which have a superior rate of 35
kW have to be installed in a technical
room with dimensions and requisites
which comply with the current stan-
dards.
The height of the boiler room must also
comply with the one indicated in fig. 3.
Furthermore with reference to air circu-
lation within the room, it is necessary to
install air vents on the external walls; the
surface of which must never be less
2
than 3000 cm
, and 5000 cm
gas with a density greater than 0,8.
2.2
CONNECTING THE SYSTEM
Before connecting the system you are
recommended to circulate the water
through the piping in order to eliminate
any foreign bodies that might be detri-
mental to the operating efficiency of the
appliance. It is always recommended to
install proper gate valves of interception
within the system flow and return pipes.
In order to achieve a good water distribu-
tion inside the cast iron body of the 'EKO
7/12 OF' boiler, the system flow and
26
return pipes should be connected to the
same side of the boiler.
CAUTION: '7/12' boilers are supplied
with the attachments on the right-hand
side, which can also be transferred to
the left-hand side. It is important in this
case, that the water distributor located
on the return header and the thermo-
stat bulbs located in the sheath are
moved to the same side.
2
The thermal jump between the system
flow and return pipes should not exceed
20°C. For this reason it is advisable to
install a mixer valve.
CAUTION: The system circulation pump
or pumps must go into action at the
time of boiler ignition. For this reason,
you are recommended to use an auto-
matic system of precedence.
The gas connection must be made using
seamless steel pipe (Mannesmann type),
which is galvanized and has threaded
joints provided with gaskets, excluding
three-piece connections,
except for initial and end connections.
Where the piping has to pass through
walls, a suitable insulating sleeve must be
provided.
When sizing gas piping, from the meter
2
to the boiler, take into account both the
for
volume flow rates (consumption) in m
and the relative density of the gas in que-
stion.
The sections of the piping which make up
the system must be as such to guaran-
tee a sufficient supply of gas to cover
the maximum demand, which limits pres-
sure loss between the gas meter and
any apparatus being used to not greater
than:
– 1.0 mbar for family II gases (natural
gas);
– 2.0 mbar for family III gases (butane
or propane).
An adhesive data plate is stuck inside
H on the basis of the total
thermal capacity:
– for no more than 116 kW:
2.00 m
– for more than 116 up to 350 kW:
2.30 m
– for more than 350 up to 580 kW:
2.60 m
– for more than 580 kW:
2.90 m
the front panel; this contains all the tech-
nical
data identifying the boiler and the type of
gas for which the boiler is arranged.
2.2. 1 Gas pipe filter
The gas valve is supplied ex factory with
an inlet filter, which, however, is not ade-
quate to entrap all the impurities in the
gas or in gas main pipes. To prevent mal-
functioning of the valve or, perhaps in
certain cases, even to cut out the safety
device with which the valve is equipped,
install an adequate filter on the gas pipe.
2.3
CHARACTERISTICS
OF FEEDWATER
Water supplied in the central heating
should be treated in compliance with the
Norm UNI-CTI 8065. It should be added
that, because of their low thermal con-
ductivity, even small incrustation of only a
few millimetres thick can cause a nota-
ble overheating of the boiler's walls and
consequently have serious drawbacks.
It is absolutely essential that the water
used for the central heating system
should be treated in the following cases:
3
/h
– Very extensive systems (with high con-
tents of feedwater).
– Frequent addition of makeup water
into the system.
- If it is necessary to empty the system
either partially or totally.
2.4
FILLING THE HEATING SYSTEM
Fill the heating system slowly to permit
air bubbles to come out through the spe-
cial outlets located in the heating system.
The pressure at which the heating
system is filled with cold water and the
pre-inflation pressure of the expansion
Fig. 3
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