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2
INSTALLATION
The boiler must be installed in a fixed loca-
tion and only by specialized and qualified
firms in compliance with all instructions
contained in this manual.
Furthermore, the installation must be in
accordance with current standards and
regulations.
2. 1
INSTALLATION
– Boilers can be installed in all domestic
environments without any whatsoever
limit in terms of location and comburent
air supply.
– These boilers can also be installed in par-
tially covered areas, as per EN 297, with
a maximum ambient temperature of
60°C and a minimum ambient temperatu-
re of -5°C. It is generally advisable to install
the boilers below weathered roofs, on the
balcony or in a protected niche, to protect
them from exposure to weathering agents
(rain, hail and snow). All boilers provide a
standard antifreeze function.
2. 1 . 1
Anti-freeze function
The boilers are equipped with anti-freeze
function which activates the pumps and the
burner when the temperature of the water
contained inside the appliance drops to
below value PAR 10.
The anti-freeze function is ensured, howe-
ver, only if:
- the boiler is correctly connected to the
gas and electricity supply circuits;
- the boiler is constantly fed;
- the boiler ignition is not blocked;
- the essential components of the boiler
are all in working order.
In these conditions the boiler is protected
against frost down to an environmental
temperature of -5°C.
ATTENTION: In the case of installation in a
place where the temperature drops below
0°C, the connection pipes must be pro-
tected.
2.3
COMPLEMENTARY ACCESSORIES
To simplify connections to the hydraulic and
gas supplies, it is also possible to use the
following accessories:
– Mounting plate, code 8075427
– Kit with bends, code 8075418
– Kit with faucets, code 8091806
– Kit with faucets ver. T, code 8091820
– Kit for the replacement of wall-mounting
assemblies of other manufacturers,
code 8093900
– Solar kit for the instantaneous, code
8105101
– Kit pr o t ection connection, code
8095421.
For detailed information on the assembly of
fittings, see the instructions contained in
the box.
2.5
CONNECTING UP SYSTEM
To protect the heat system from damaging
corrosion, incrustation or deposits, before
installation it is extremely important to
clean the system using suitable products
such as, for example, Sentinel X300 (new
systems), X400 and X800 (old systems)
or Fernox Cleaner F3. Complete instruc-
tions are provided with the products but,
for further information, you may directly
contact SENTINEL PERFORMANCE SOLU-
TIONS LTD or FERNOX COOKSON ELECTRO-
NICS. For long-term protection agains cor-
rosion and deposits, the use of inhibitors
such as Sentinel X100 or Fernox Protec-
tor F1 is recommended after cleaning the
system. It is important to check the con-
centration of the inhibitor af ter each
system modification and during maintenan-
ce following the manufacturer's instruc-
tions (specific tests are available at your
dealer).
The safety valve drain must be connected
to a collection funnel to collect any dischar-
ge during interventions. If the heating
system is on a higher floor than the boiler,
install the on/off taps supplied in kit optio-
nal on the heating system delivery/return
pipes.
WARNING: Failure to clean the heat
system or add an adequate inhibitor inva-
lidates the device's warranty.
Gas connections must be made in accor-
dance with current standards and regula-
tions. When dimensioning gas pipes from
the meter to the module, both capacity
volume (consumption) in m
3
/h and gas
density must be taken into account.
The sections of the piping making up the
system must be such as to guarantee a
supply of gas sufficient to cover the maxi-
BRAVA DGT HE 25-30-35
1
7
9
2
3
BRAVA DGT HE 12 T
7
mum demand, limiting pressure 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 sticked inside the
front panel; it contains all the technical data
identifying the boiler and the type of gas for
which the boiler is arranged.
2.5. 1
Connection of condensation
water trap
The drip board and its water trap must be
connected to a civil drain through a pipe
with a slope of at least 5 mm per metre to
ensure drainage of condensation water.
The plastic pipes normally used for civil
drains are the only type of pipe which is
appropriate for conveying condensation
to the building's sewer pipes.
2.5.2
Filter on the gas pipe
The gas valve is supplied ex factory with an
inlet filter, which, however, is not adequate
to entrap all the impurities in the gas or in
gas main pipes.
To prevent malfunctioning of the valve, or in
certain cases even to cut out the safety
device with which the valve is equipped,
install an adequate filter on the gas pipe.
2.6
SYSTEM FILLING (fig. 6)
Filling of the boiler and the system is done by
the system filling (3 fig. 6).
8
KEY
1 D.H.W. flow meter (white)
2 Sensor effect HALL (blue)
3 System filling (blue)
4 3 BAR safety valve
5 Boiler discharge
6 Automatic by-pass (blue)
4
5
6
7 Water pressure valve
8 Diverter valve
9 Heating water filter (blue)
8
NOTE: They are evidenced in
blue/white the members for
which are previewed the verifi-
cation and the control.
4
5
6
IT
ES
PT
ENG
Fig. 6
95
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