IT
ENG
41
INSTALLATION
1.2
BOILER ROOM
1.2.1
Check that the room has the requirements and
features in accordance to the rules in force.
Furthermore, the room should be aired, in
order to have a regular combustion. Therefore
it is necessary to practice some openings in
the walls of the room, which correspond to the
following requirements:
– They should have a free section of at least
6 cm
2
for each 1,163 kW (1000 kcal/h).
The minimum opening section shouldn’t
be smaller than 100 cm
2
. The section can
also be calculated, using the following
ratio:
Q
S =
100
where “S” is expressed in cm
2
.
“Q” is expressed in kcal/h
– The opening should be situated on the
lower part of an outer wall, preferably on
the opposite of the one for the combustion
gas discharge.
CONNECTION TO THE FLUE
1.2.2
A flue should correspond to the following
requirements:
– It should be of waterproof material and
resistant to temperature of smokes and
related condensations.
– It should be of a sufficient mechanical
resistance and a weak thermal conductivity.
– It should be perfectly hermetic in order to
avoid cooling of the flue.
– It should have the most possible verti-
cal process and the terminal part should
have a static aspirator, which assures an
efficient and constant discharge of the
combustion product.
– In order to avoid the wind creating a very
high pressure around the chimneypot, so
that it prevails on the ascensional force of
the combustion gas, it is necessary that the
discharge orifice hangs over at least 0,4
meters of whatever structure adjacent the
chimney itself (including the roof ridge)
of at least 8 meters.
– The flue shouldn’t have a diameter infe-
rior to the boiler connection; for flues with
square or rectangular sections, the internal
section should be higher than 10% com-
pared to the boiler connection one.
– The net section of the flue can be obtained
from the following ratio:
P
S = K
√
H
S section resulting in cm
2
K reduction
coefficient:
– 0,045 for wood
– 0,030 for carbon
P boiler capacity in kcal/h
H height of the chimney in meters
measured from the flame axis at the
exhaust of the chimney in the atmos-
phere. For the dimensioning of the
flue you should consider the effec-
tive height of the chimney in meters,
measured from the flame axis at the
top, diminished with:
– 0,50 m for each direction chang-
ing of the connection tube between
boiler and flue;
– 1,00 m for each horizontal devel-
opment meter of the connection
itself.
CONNECTION OF THE PLANT
1.2.3
The connections should be easily discon-
nected by means of pipelines with revolving
joints. It is always advisable to assemble
suitable interception shutters on the piping of
the heating installation.
CAUTION: It is obligatory to assemble
safety valves on the system not included
in supply.
Plant filling
Before starting with the connection of the
boiler it is advisable to let the water circulate
in the piping, in order to eliminate possible
foreign bodies, which could compromise the
correct operation of the appliance.
The filling should be carried out slowly in
order to make the air bubbles go out through
the proper outlets, placed on the heating
installation.
The cold loading pressure of the plant and the
pre-blowing pressure of the expansion tank,
should correspond or however shouldn’t be
inferior to the height of the static column
of the plant in case of closed circuit heating
installations (for example, for a static column
of 5 meters, the pre-loading pressure of the
tank and the loading pressure of the plant
should correspond at least to a minimum
value of 0,5 bar).
Features of the feed water
THE TREATMENT OF THE WATER USED
FOR THE HEATING INSTALLATION
IS ABSOLUTELY NECESSARY IN THE
FOLLOWING CASES:
– Very vast plants (with high water con-
tents).
– Frequent replenishment water inlets in the
plant.
– If the partial or total emptying of the plant
should be necessary.
BRAZIER GRID ASSEMBLY
1.2.4
(OPTIONAL)
In order to carry out the assembly proceed in
the following way (fig. 3):
– Punch the card of the outer part, between
the front head and the intermediate ele-
ment, using a bit of 10 ø as indicated in the
detail (B).
– Place the back grid (12) in the combustion
chamber.
– Place the front grid (10) and block it to the
hub (9) with the screws (8) and the nuts
(7); block the front grid from the right side
of the boiler body with the screws (5).
– Hook the tie rod (6) to the seats extracted
from the front and rear grid.
– Place the intermediate grids (11).
– Introduce the ring (4) and the lever (3) on
LEGEND
1
Screw TE M8 x 10
2 Grower washer
3 Grid lever
4 Ring for lever
5 Screw TE M8 x 35
6 Tie rod
7 Nut M 10
8 Screw TE M10 x 50
9 Hub
10 Front grid
11 Intermediate grid
12 Rear grid
Fig. 3
