Installation; Boiler Room; Boiler Room Dimensions; Connecting Up System - Sime RONDO 3 OF Instrucciones De Instalación Y Mantenimiento

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INSTALLATION

2.1 BOILER ROOM
The boiler room should feature all the char-
acteristics required by standards governing
liquid fuel heating systems.
2.2 BOILER ROOM DIMENSIONS
Position the boiler body on the foundation
bed, which should be at least 10 cm high.
The body should rest on a surface allowing
shifting, possibly by means of sheet metal.
Leave a clearance between the boiler and
the wall of at least 0.60 m, and between the
top of the casing and the ceiling of 1 m (0.50
m in the case of boilers with incorporated
D.H.W. tank). The ceiling height of the boiler
room should not be less than 2.5 m.
2.3 CONNECTING UP SYSTEM
When connecting up the water supply to the
boiler, make sure that the specifications
given in fig. 1 are observed. All connecting
unions should be easy to disconnect by
means of tightening rings. A closed expan-
sion tank system must be used.
2.3.1 Filling the water system
Before connecting the boiler, thoroughly
flush the system to eliminate scale which
could damage the appliance.
Filling must be done slowly 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
pressure 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 meters, the vessel pre-charging
pressure and installation filling pressure
should be at least 0.5 bar).
2.3.2 Characteristics of feedwater
Water supplying the heating circuit must
be treated in accordance with UNI-CTI 8065
standards.
It is absolutely essential to treat water in the
heating system in the following cases:
– For extensive systems (with high con-
tents of water).
– Frequent addition of water into the sys-
tem.
– Should it be necessary to empty the sys-
tem either partially or totally.
2.3.3 D.H.W. storage tank
The RONDÒ -ESTELLE boilers may be
matched with the separate boiler units.
Fit a safety valve calibrated to 6 bar on the
tubing of the cold water supply to the boiler
unit (12 fig. 2). In case the system pressure
is excessive fit an appropriate pressure
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reducer. If the safety valve calibrated to 6
bar frequently intercepts, fit an expansion
vessel with a capacity of 8 litres and a maxi-
mum pressure of 8 bar (11 fig. 2). The tank
should be of the membrane type, made of
natural rubber "caoutchouc", which is suit-
able for foods.
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 difficult and there
will be a consequent formation of soot, con-
densate and encrustation. The flue used to
expel combustion products into the atmos-
phere must meet the following require-
ments:
– be constructed with waterproof materi-
als, and resistant to smoke temperature
and condensate;
– be of adequate mechanical resilience and
of low heat conductivity;
– be perfectly sealed to prevent cooling of
the flue itself;
– be as vertical as possible; the terminal
section of the flue must be fitted with a
static exhaust device that ensures con-
stant and efficient extraction of products
generated by combustion;
– to prevent the wind from creating pres-
sure zones around the chimney top
greater than the uplift force of combus-
tion 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;
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7
2
– have a diameter that is not inferior to that
of the boiler union: square or rectangu-
lar-section flues should have an internal
section 10% greater than that of the
boiler union;
– the useful section of the flue must con-
form 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 meters, measured
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 FITTING THE CASING "RONDÒ"
The casing and the control panel are sup-
plied in separate cardboard packages.
The housing package also contains the boil-
er documents and the glass wool for insu-
lating the cast iron body. To fit the casing,
proceed as follows (fig. 5):
– fit the lower front (1) and back (2) brackets
to the heads with the four TE screws sup-
plied;
12
5
11
1
1
9
3
2
4
9
8
Fig. 5