70
must be between
1
and
1.2 bar
.
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 pres-
sure by opening the pressure-relief valve.
2.5.1
Emptying the system (fig. 4)
Use the drain tap to empty the system (5
fig. 4). Turn off the boiler before doing this.
2.6
FLUES/CHIMNEYS
A chimney or flue for the evacuation of the
combustion products into the atmosphere
must correspond to the requisites prescri-
bed by the laws in force.
In particular, the specific prescriptions of
law relative to boilers with natural draught
in collective pipes (type B) and those for boi-
lers with forced draught (type C) must be
respected.
2.6.1
Ducting of existing chimneys
To recover or duct existing chimneys, ducts
declared suitable for the purpose by the
manufacturer must be used, and the instal-
lation and use modalities indicated by the
said manufacturer must also be followed
as well as the prescriptions of Standard
UNI 10845.
2.7
INSTALLATION OF COAXIAL
DUCT (versions "BF")
2.7.1
Accessories 60/100 (fig. 5)
The 60/100 coaxial duct is supplied on
request in kit code 8084811.
The diagrams of fig. 5 illustrate some
examples of different types of discharge
modalities allowed and the maximum
lengths that can be reached.
2.7.2
Diaphragm for 60/100
coaxial duct (fig. 5/a)
The boiler is supplied with a diaphragm of
ø 79 (version
25 BF
), ø 81 (version
30
BF
).
Use the diaphragms according to the indi-
cations of fig. 5/a.
C12
C32
C42
3
1
2
7
6
4
3
2
8
x
y
max 5,0 m per vers.
“20”
max 3,5 m per vers.
"25"
max 3,0 m per vers.
"30-35"
x + y = max 5,0 m per vers.
"20"
x + y = max 3,5 m per vers.
"25"
x + y = max 3,0 m per vers.
"30-35"
min 1
,3 m - max 5 m
KEY
1
Coaxial flue kit L. 810 code 8084811
2 a Extension L. 1000 code 8096103
2 b Extension L. 500 code 8096102
3
Vertical extension L. 200 code 8086908
4
Additional 90° curve code 8095801
6
Articulated tile code 8091300
7
Roof outlet terminal L. 1284 code 8091200
8
Vertical condensation collector L. 200 code 8092803
Fig. 5
IMPORTANT:
– Each additional 90° curve
installed reduces the available
length by 1.0 metres.
– Each additional 45° curve
installed reduces the available
length by 0.50 metres.
- The insertion of the condensa-
tion collector (8) is obligatory
for vertical stretches of more
than 1.3 metres.
Fig. 5/a
For discharge types C12-C42, use the diaphragms supplied with the boiler:
- ø 79.0 for version “25” only when the length of the coaxial duct is less than 1 metre.
- ø 81.0 for version “30” only when the length of the coaxial duct is less than 1 metre.
For discharge types C32, use the following diaphragms according to the length of the duct and without
additional curves:
Installations with vertical
Installations with vertical condensation
extension L. 200 code 8086908 *
collector code 8092803 *
Models “25 BF - 30 BF”
Models “25 BF - 30 BF”
Diaphragm
Diaphragm
Without
Diaphragm
Diaphragm
Without
ø 79
ø 81
diaphragm
ø 79
ø 81
diaphragm
L max = 2.5 m
L max = 2.5 m
L max = 5 m
L max = 2.5 m
L max = 2.5 m
L max = 5 m
* Minimum length of duct L = 1.3 m.
