SFL
14
EN
cod. 3540Z902 - 01/2012 (Rev. 00)
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
fig. 16 - Dimensions and connections
a1
System delivery
a2
System return
a3
System drain cock
a4
Flue
a5 - a6
Safety coil connections
a7
Safety coil sheath connection
5.1 Technical data table
The column on the right gives the abbreviation used on the dataplate.
5.2 Diagrams
Pressure loss
fig. 17 - Pressure loss
Model
L
SFL 3
510
SFL 4
620
SFL 5
730
SFL 6
840
SFL 7
950
520
940
L
A
684.5
167.5
260
260
201
78
213
a1
a7
a5 a6 a4
a2
a3
Data
Unit
SFL 3
SFL 4
SFL 5
SFL 6
SFL 7
Heat output Wood
kW
19
27
36
43
50
(P)
Heat output Coke
kW
22.5
32.5
42.5
52.5
62.5
(P)
Heat output Pellets
kW
22
30
36
42
48
(P)
Efficiency Wood
%
77
78
78
78
78.5
Efficiency Coke
%
79
79.5
80
80.5
81
Efficiency Pellets
%
87.6
87.7
87.7
87.7
87.8
Max. working pressure
bar.
4
4
4
4
4
Water content
L.
26
30
34
38
42
Chamber volume
dm
3
48
68
88
108
128
Loading opening dimen-
sions Wood/Coke
mm 384x210
384x210
384x210
384x210
384x210
Temperature adjustment
range Wood/Coke
°C
30-90
30-90
30-90
30-90
30-90
Max. heating tempera-
ture Wood/Coke
°C
95
95
95
95
95
Recommended tempera-
ture setting
°C
>60
>60
>60
>60
>60
Boiler return min. temper-
ature
°C
50
50
50
50
50
Safety coil cooling
water supply line require-
ments
Min. pressure
- bar
2.0
2.0
2.0
2.0
2.0
Min. flow rate
- l/min
10
10
10
10
10
Max. temperature
-
°C
25
25
25
25
25
Duration of one wood
load
h
2.5
2.5
2.5
2.5
2.5
Duration of one coke load
h
4.5
4.5
4.5
4.5
4.5
Min. flue draught Wood
Pa
12
14
16
18
20
Min. flue draught Coke
Pa
8
10
15
20
25
Min. flue draught Pellets
Pa
23
25
28
30
32
Efficiency class EN303-5
3
3
3
3
3
Empty weight
kg
193
241
289
337
385
14
12
10
8
6
4
2
0
mbar
0
500
lt/h
1000
1500
1500
2000
2500
3000
3500
4000
4500
