Installation; Boiler Room; Connecting Up System - Sime AQUA Serie Manual Del Usuario

2

INSTALLATION

2.1

BOILER ROOM

The boilers with a rating of more
than 35 kW must be equipped with a
technical room whose dimensions and
requirements correspond to the cur-
rent standards and regulations.
The minimum distance between the
walls of the room and the boiler must
not be less than 0.60 m., while the
minimum height between the top of
the boiler and the ceiling must be at
least 1 m. which can be reduced to
0.50 m. for boilers with incorporated
heaters (however the minimum height
of the boiler room must not be less
than 2,5 m). The boilers with a rating
of less than 35 kW can be installed
only in perfectly air-vented rooms.
To circulate air in the room, air vents
must be made on the outside walls
which satisfy the following require-
ments:
– Have a total surface area of at least
2
6 cm for each installed Kw of ther-
mal capacity and however not less
2
than 100 cm .
– To be situated as close as possi-
ble to the floor, unobstructable and
protected by a grate which does not
reduce the air passage area.
2.2

CONNECTING UP SYSTEM

Before proceeding to connect up the
boiler, you are recommended to make
the water circulate in the piping in
order to eliminate any foreign bodies
that might be detrimental to the oper-
ating efficiency of the appliance.
For connecting up the pipes, make
sure to follow the indications illus-
trated in fig. 1.
The connections should be easy to
disconnect using pipe unions with ori-
entable connections.
The shutoff valve must be connected
to a suitable flow system and return
pipes.
2.2.1 System filling (fig. 4)
The boiler and the relative system
must be filled operating on the bearing
tap and the pressure of cold charging
the system must be included between
1 - 1.2 bar. During filling the main
switch should be left open.
Filling must be done slowly so as to
allow any air bubbles to be bled off
through the provided air vents.
This operation can be made easy by
positioning horizontally the incision of
the block screw of the shutoff valve.
Upon completing the filling, put the
screw back to its original position. At
the end of the operation make sure
that the tap is closed (fig. 4).
2.2.2 D.H.W. production
In order that the boiler be capable of
supplying treated water, all the air in
the boiler's serpentine must be bled
off at the first ignition.
This operation is made easy by posi-
tioning horizontally the incision of the
block screw of the shutoff valve (5 fig.
2-2/a). After all the air has been bled
off, put the screw back to its original
position.
2.2.3 Characteristics of feedwater
To prevent lime scale and damage to
the tap water exchanger, the water
supplied should have a hardness of no
more than 20°F.
In all cases the water used should be
tested and adequate treatment devi-
ces should be installed.
To prevent lime scale or deposits on
the primary exchanger, the water
used to supply the heating circuit
should must be treated in accordan-
ce with UNI-CTI 8065 standards. It is
absolutely essential that the water is
to be treated in the following cases:
– Very extensive systems (with high
contents of feedwater).
– Frequent addition of makeup water
into the system.
– In case it is necessary to empty the
system either partially or totally.
OPEN
2.3 SMOKE EXHAUST
2.3.1 Connecting up flue (
type B)
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 conse-
quent formation of soot, condensation
and encrustation.
A flue therefore must satisfy the fol-
lowing requirements:
– be constructed with waterproof
materials and resistant to smoke
temperature and condensate;
– be of adequate mechanical resil-
ience and of low heat conductivity;
– be perfectly sealed to prevent cool-
ing of the flue itself:
– be as vertical as possible; the ter-
minal section of the flue must be
fitted with a static exhaust device
that ensures constant and efficient
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 high-
er 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% great-
er than that of the boiler union;
– the useful section of the flue must
conform to the following formula:
Fig. 4
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