Emptying The System - Sime MURELLE 25 OF Manual Del Usuario

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.
N.B. The OFT/BFT versions are loaded by
means of the special coupling indicated in
figs. 1/a - 1/c
2.5. 1

Emptying the system

Use the drain tap to empty the system (9
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 - BFT")
2.7. 1 Accessories 60/100
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
For discharge types C12-C42, use the diaphragms supplied with the boiler:
- ø 84.0 for version "20" only when the length of the coaxial duct is less than 2 metres,
- ø 86.0 for version "25-35" only when the length of the coaxial duct is less than 1 metre,
- ø 87.5 for version "30" only when the length of the coaxial duct is less than 2 metres.
For discharge types C32, use the following diaphragms according to the length of the duct and without
additional curves:
Installations with vetrical
extension L. 200 code 8086908 *
"20 BFT" models
Diaphragm Diaphragm
ø 84 ø 86
(code 6028622) (code 6028623)
L max = 4 m L max = 5 m
"25 BF - 25 BFT - 30 BF - 35 BF" models
Diaphragm Diaphragm
ø 86 ø 87,5
(code 6028623) (code 6028624)
L max = 2.5 m L max = 4 m
* Minimum length of duct L = 1.3 m.
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"
IMPORTANT:
– Each additional 90° cur ve
installed reduces the available
length by 1.0 metres.
– Each additional 45° cur ve
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.
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
lengths that can be reached.
2.7.2 Diaphragm for 60/100
coaxial duct
The boiler is supplied with a diaphragm of
Installations with vertical condensation
collector code 8092803 *
"20 BFT" models
Without Diaphragm
diaphragm ø 84
(code 6028622) (code 6028623)
---- L max = 3 m
"25 BF - 25 BFT - 30 BF - 35 BF" models
Without Diaphragm
diaphragm ø 86
(code 6028623) (code 6028624)
L max = 5 m ---
x
2
4
y
3
C42
max 5,0 m per vers. "20"
max 3,5 m per vers. "25"
max 3,0 m per vers. "30-35"
C12
84 (version 20 BFT), 86 (versions 25-35
BF/25 BFT) and 87.5 (version 30 BF). The
diaphragms 87.5 (code 6028824) and 86
(code 6028623) can be requested separa-
tely. Use the diaphragms according to the
indications of fig. 5/a.
Diaphragm Without
ø 86 diaphragm
L max = 5 m ---
Diaphragm Without
ø 87,5 diaphragm
L max = 2.5 m L max = 4 m
7
6
2
3 8
C32
1
Fig. 5
Fig. 5/a
ES
PT
GB
79