Ariston CLAS B 28 FF, Installation And Service Instructions Manual

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34
installation
Gas connection
The boiler was designed to use gases belonging to the categories as
shown in the following table.
COUNTRY MODEL CATEGORIES
F F 8 2 B S A L C
Make sure, using the labels on the packaging and the data plate on
the appliance itself, that the boiler is in the correct country and that
the gas category for which the boiler was designed corresponds to
one of the categories available in the country where it will be used.
The gas supply piping must be created and measured out in
c legal requirements and in accordance with
the maximum power of the boiler; you should also make sure that
valve is the right size and that it is connected correctly.
Before carrying out the installation, it is recommended that the fuel
pipes are cleaned thoroughly in order to remove any residues which
could prevent the boiler from operating correctly.
Check that the supplied gas corresponds to the type of gas for which
the boiler was designed (see the data plate located on the appliance
itself).
It is also important to check that the pressure of the gas (methane
or LPG) you will be using to feed the boiler is suitable, because if it
cient the power of the generator may be reduced, causing
inconvenience for the user.
Water connection
The illustration shows the connections for the water and gas
attachments of the boiler.
Check that the maximum water mains pressure does not exceed 6
bar; if it does, a pressure reducing valve must be installed.
View of the Boiler Connections
A
B
C
D
E
F
G
H
H
I
Legend:
A. Central heating Flow
B. Domestic Hot Water Outlet
C. Gas Inlet
D. Domestic Cold Water Inlet
E. Central Heating Return
F. Safety Valve Discharge heating circuit
G. Safety Valve DischargeD.H.W. circuit
H. Filling valves
I. Drain Valve
0,0
0,5
1,0
1,5
2,0
2,5
3,0
3,5
4,0
4,5
5,0
0
100 200 300 400 500 600 700 800 900 1000 1100 1200 1300
mCE
l/h
Pression disponible
28 kW
1
2
3
4
For the measuring of the pipes and of the heating bodies in the
heating system, the residual head value should be calculated as a
ow rate, in accordance with the values
shown in the circulation pump graph.
Residual Head of the Boiler ∆T 20°C
Excessive pressure device
Fit the drain pipe for safety valves “
F
” and
"G"
, included in the
hydraulic kit. The excessive pressure device outlet (see Figure) must
be connected to a drainage siphon which can be checked visually in
order to prevent maintenance procedures causing harm to people,
animals or property (the manufacturer shall not be held responsible
for any such damage).
Cleaning the heating system
Where the boiler is used in conjunction with an older system, various
substances and additives may be present in the water and these
ect on the operation and durability of the
new boiler. Before replacing the old boiler, you must arrange for the
system to be cleaned thoroughly in order to eliminate any residue
or dirt which could compromise the correct operation of the water
heater. Make sure the capacity of the expansion vessel is suited to
the amount of water contained in the system.
Drain the storage
NG 12T