Power
Smokes
Smokes
D.H.W.
D.H.W. flow rate
Minimum
D.H.W. pressure
BOILER MODEL
consumption
temperature
flow
Heat Output
∆t 30°C
D.H.W. flow rate
Min.
Max.
°C
gr/s
kW
I/min
I/min
bar
bar
MURELLE 20
105 (150 vers. TX)
100
24.7
23.3
11.0
2
0.5
7
MURELLE 25
120
100
29.4
27.6
12.9
2
0.5
7
MURELLE 20 BF
150
136
17.2
23.3
11.0
2
0.5
7
MURELLE 25 BF
160
136
22.8
29.6
12.9
2
0.5
7
TABLE 2
Main burner nozzles
Pilot injector
Gas consumption (*)
BOILER MODEL
Quantity
Natural gas
G30-G31
Natural gas
G30-G31
Natural gas
L.P.G. G30
L.P.G. G31
N°
ø mm
ø mm
ø mm
ø mm
m
3
/h
kg/h
kg/h
MURELLE 20
13
1.30
0.75
0.25
0.20
2.72
2.02
1.99
MURELLE 25
15
1.30
0.77
-
-
3.23
2.41
2.37
MURELLE 20 BF
13
1.30
0.75
0.27
0.20
2.72
2.02
1.99
MURELLE 25 BF
15
1.30
0.77
-
-
3.47
2.58
2.54
1.3
TECHNICAL FEATURES
Heat Output
Heat Input
Electr. protection
Maximum
Expans. vessel
Expans. vessel
Weight
BOILER MODEL
(adjustable)
(adjustable)
grade
water head
contents
preloading
kW
kW
W
bar
l
bar
Kg
MURELLE 20
9.3 ÷ 23.3
10.8 ÷ 25.7
–
3
7
1
40
MURELLE 25
11.6 ÷ 27.6
13.5 ÷ 30.6
–
3
7
1
48
MURELLE 20 BF
9.3 ÷ 23.3
10.8 ÷ 25.7
IP 44
3
7
1
48
MURELLE 25 BF
15.1 ÷ 29.6
18.0 ÷ 32.8
IP 44
3
7
1
54
TABLE 1
TABLE 3
Burner gas pressure
Gas supply pressure
BOILER MODEL
Natural gas
L.P.G. (G30)
L.P.G. (G31)
Natural gas
L.P.G. (G30)
L.P.G. (G31)
mbar
mbar
mbar
mbar
mbar
mbar
MURELLE 20-20 BF
10
28
35
20
30
37
MURELLE 25-25 BF
11
28
35
20
30
37
TABLE 4
NOTE:
The burner header gas pressure and inputs shown in the table refer to the boiler max. capacity. These values must be kept to
in the D.H.W. production.
2
(*) The gas consumptions refer to the calorific value at standard conditions at 15°C - 1013 mbar
