Technical Data And Characteristics - Ferroli SFL Instructions For Use, Installation And Maintenance

Regularly or the end of every period of operation, carefully clean the boiler, and also the
flue if necessary. To clean the boiler, open both cast-iron doors, remove the coal grate
then, with a flexible metal tube brush, carefully clean the combustion chamber and the
various flueways. Then remove any soot deposited in the ashpan. Also make sure the
fume exhaust pipes and flue are clean and perfectly tight.
Periodical check
To ensure correct operation of the unit over time, have qualified personnel carry out a
yearly check, providing for the following:
• Check and if necessary clean the boiler and fume ducts as described in the previous
section.
• Check the burner plates.
• Check the tightness of the loading and ash door; replace the seal if necessary.
• The control and safety devices must function correctly.
• The fume exhaust circuit must be perfectly efficient.
• The fume ducts must be free of obstructions and leaks
• The water pressure in the system when cold must be approx. 1 bar; otherwise, bring
it to that value.
• The circulating pump must not be blocked.
• The expansion tank must be filled.
• A possible pellet burner (with optional kit) must be checked according to the instruc-
tions provided with the burner.

5. TECHNICAL DATA AND CHARACTERISTICS

520
260 260
213
fig. 16 - Dimensions and connections
Model
SFL 3
SFL 4
SFL 5
SFL 6
SFL 7
a1 System delivery
a2 System return
a3 System drain cock
a4 Flue
a5 - a6 Safety coil connections
a7 Safety coil sheath connection
14
EN
a7 a1 a5 a6 a4
a2
a3
L
L
510
620
730
840
950
cod. 3540Z902 - 01/2012 (Rev. 00)
5.1 Technical data table
The column on the right gives the abbreviation used on the dataplate.
Data Unit
Heat output Wood kW
Heat output Coke kW
Heat output Pellets kW
Efficiency Wood %
Efficiency Coke %
Efficiency Pellets %
Max. working pressure bar.
Water content
Chamber volume
dm
Loading opening dimen-
mm 384x210
sions Wood/Coke
Temperature adjustment
°C
range Wood/Coke
Max. heating tempera-
°C
ture Wood/Coke
Recommended tempera-
°C
ture setting
Boiler return min. temper-
°C
ature
Min. pressure - bar
Safety coil cooling
Min. flow rate - l/min
water supply line require-
Max. temperature -
ments
°C
Duration of one wood
load
Duration of one coke load
Min. flue draught Wood Pa
Min. flue draught Coke Pa
Min. flue draught Pellets Pa
Efficiency class EN303-5
Empty weight kg
5.2 Diagrams
Pressure loss
14
12
10
8
6
4
2
0
500 1000 1500 1500
0
fig. 17 - Pressure loss
SFL 3 SFL 4 SFL 5 SFL 6
19 27 36 43
22.5 32.5 42.5 52.5
22 30 36 42
77 78 78 78
79 79.5 80 80.5
87.6 87.7 87.7 87.7
4 4 4 4
L. 26 30 34 38
3
48 68 88 108
384x210 384x210 384x210
30-90 30-90 30-90 30-90
95 95 95 95
>60 >60 >60 >60
50 50 50 50
2.0 2.0 2.0 2.0
10 10 10 10
25 25 25 25
h
2.5 2.5 2.5 2.5
h
4.5 4.5 4.5 4.5
12 14 16 18
8 10 15 20
23 25 28 30
3 3 3 3
193 241 289 337
2000 2500 3000 3500
SFL
SFL 7
50 (P)
62.5 (P)
48 (P)
78.5
81
87.8
4
42
128
384x210
30-90
95
>60
50
2.0
10
25
2.5
4.5
20
25
32
3
385
4000 4500
lt/h