75
2.5
SYSTEM FILLING
(fig. 5)
Filling of the boiler and the system is done by
the charge cock (2). The charge pressure,
with the system cold, must be between
1
and
1.2 bar
. During system filling you are recom-
mended to keep the main switch turned OFF.
Filling must be done slowly so as to allow
any air bubbles to be bled off through the
air valves. Should the pressure have
risen well above the limit expected,
discharge the over pressure by opening
the pressure-relief valve.
2.5.1
Emptying the system
(fig. 5)
Use the drain tap to empty the system (9).
Turn off the boiler before doing this.
2.6
FLUES/CHIMNEYS
The flue or chimney used to release the
products of combustion into the atmosphe-
re must comply with current legislation.
2.6.1
Passing flue pipes through
an existing chimney
When renovating or passing flue pipes
through an existing chimney, use only flues
which are declared suitable for the purpose
by the manufacturer, following the instruc-
tions for installation and use provided by the
manufacturer.
2.7
INSTALLATION COAXIAL DUCT
The air inlet-smoke outlet assembly ø
60/100 is supplied in a kit code
8084805/8084811
complete
with
mounting instructions.
With the curve supplied in the kit the maxi-
mum horizontal length of the flue must not
exceed 3.4 metres in model “25 BF” or 3
metres in model “30 BF”. Each additional
curve code 8085601 installed reduces
the available length by 1.4 metres.
The diagrams in fig. 6 illustrate a number
of examples of different coaxial outlets.
2.7.1
Coaxial flue diaphragm
The boiler is normally supplied with Ø 87.5
diaphragm. Insert the diaphragm only if
the length of the coaxial flue is less than
1.8 me tr es in model
“ 2 5 B F ”
or 1.5
metres in model
“30 BF”
. Refer to fig. 7
for positioning.
2.8
INSTALLATION
SEPARATE PIPES
When installing the pipes, follow closely
8
5
7 6
4
2
3
1
9
Fig. 5
5
8
3 2
9
4
KEY
1 D.H.W. inlet/outlet manifold
2 Fill tap
3 D.H.W. filter
4 Manifold by-pass
5 Water rate adjuster
6 D.H.W. exchanger
7 Microswitches
8 Water flow switch
9 Boiler discharge
max 3,4 m
"25"
max 3,0 m
"30"
C12
C32
C42
3
1
2
7
6
4
5
2
min 1,3 m - max 4 m
KEY
1 Coaxial flue kit code 8084805/8084811
2 Extension L. 820 code 8084804
3 Vertical extension L. 590 code 8086905
4 Additional 90° curve code 8085601
5 Adapter code 8086901
6 Articulated tile code 8091300
7 Roof outlet terminal L. 1280 code 8091200
Fig. 6
With outlet type C32, use the following diaphragms, depending on flue
length and without any additional curves:
Optional diaphragm Ø 86 (Code 6028623) Standard diaphragm Ø 87.5
L min = 1,3 m
L min = 2,5 m
L max = 2,5 m
L max = 4 m
IMPORTANT: Each additional curve code
8085601 installed reduces the available
length by 1.4 metres.
Fig. 7
IMPORTANT: Install diaphragm Ø 87.5
only if the coaxial flue is less than 1.8
metres long for model “25 BF” or 1.5
metres long for model “30 BF”.
“25 OF” model
“25 BF - 30 BF” model
