Connecting Up Flue; Boiler Body - Sime 1R Série Mode D'emploi

2.3. 1 Filling the water system
Before connecting the boiler, thorou-
ghly flush the system to eliminate
scale which could damage the applian-
ce. Filling must be done slowly so as to
allow any air bubbles to be bled off
through the air valves. In closed-circuit
heating systems, the cold water filling
pressure and the pre-charging pressu-
re of the expansion vessel should be no
less than or equal to the height of the
water head of the installation (e.g. for
water head of 5 metres, the vessel pre-
charging pressure and installation filling
pressure should be at least 0.5 bar).
2.3.2 Water system characteristics
THE WATER USED FOR THE CENTRAL
HEATING SYSTEM SHOULD BE TREA-
TED IN THE FOLLOWING CASES:
– for extensive systems (with high
contents of water);
– frequent addition of water into the
system;
– should it be necessary to empty the
system either partially or totally.
2.4

CONNECTING UP FLUE

The flue is of fundamental importance
for the proper operation of the boiler; if
not installed in compliance with the
standards, starting the boiler will be dif-
ficult and there will be a consequent for-
mation of soot, condensate and encru-
station. The flue used to expel combu-
stion products into the atmosphere
must meet the following requirements:
– be constructed with waterproof
materials, and resistant to smoke
temperature and condensate;
– be of adequate mechanical resilien-
ce and of low heat conductivity;
– be perfectly sealed to prevent coo-
ling of the flue itself;
– be as vertical as possible; the termi-
nal section of the flue must be fitted
with a static exhaust device that
ensures cons t ant and ef ficient
extraction of products generated by
combustion;
– to prevent the wind from creating
pressure zones around the chimney
top greater than the uplift force of
combustion gases, the exhaust outlet
should be at least 0.4 m higher than
structures adjacent to the stack
(including the roof top) within 8 m;
– have a diameter that is not inferior
to that of the boiler union: square or
rectangular-section flues should
have an internal section 10% grea-
ter than that of the boiler union;
– the useful section of the flue must
conform to the following formula:
P
S = K
√H
S resulting section in cm
K reduction coefficient for liquid
fuels:
– 0.045 for firewood
– 0.030 for coal
– 0.024 for light oil
– 0.016 for gas
P boiler input in kcal/h
H height of flue in metres, measu-
red from the flame axis to the
top of the flue reduced by:
– 0.50 m for each change of
direction of the connection
union between boiler and flue;
– 1.00 m for each metre of
union itself.
2.5

BOILER BODY

The boiler body comes supplied assem-
bled. Where there is difficulty in gaining
access to the boiler room, the body
can be supplied in separate sections.
For assembly, proceed as follows:
– Prepare the sections, cleaning the
seats of the tapered nipples with
solvent.
– Insert the bead of putty (fig. 5) in the
groove provided for fume tightness,
pressing lightly.
– Prepare one of the two intermedia-
te sections. After lubricating them
with boiled linseed oil, insert the
tapered nipples (fig. 5/a).
– Prepare the head, proceeding as
above, and bring it up to the inter-
mediate section. Add only one sec-
tion at a time.
– Assemble the sections, using the
tools provided consisting of a pair of
staybolts for assembly with the cor-
r esponding accessor ies (code
6050900 - fig. 6), exerting pressu-
re simultaneously on the top hub
and on the bottom hub. If, during
this operation, the sections were to
slot together in such a way as not to
be even and parallel, slide a chisel in
the tighter side and, by applying a lit-
tle f or ce, br ing t he two pieces
together so that they are parallel.
The sections can be considered pro-
perly joined together when their
outer edges come into contact;
– Insert the bead of putty in the groo-
ve of the section that has just been
2
assembled, and then proceed to joi-
ning up the other sections until the
body is completed.
NOTE: before proceeding to connect
the system, test the boiler block with
a water pressure of 7.5 bar.
KEY
1 Pin
2 Flange ø 35/87
3 Biconical nipples
4 Staybolt L. 900 + staybolt L. 980
5 Flange ø 50/87
6 Stub
7 Thrust bearing
8 Nut
9 Tightening wrench
Fig. 5
Fig. 5/a
Fig. 6
9