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–
37 140
MURELLE 25 11
.
6÷27
.
613
.
5÷30
.
6
–37 148
MURELLE 20 BF 9.3
÷
23.3
10
.
8÷25
.
7 IP 44
37 148
MURELLE 25 BF 15
.
1÷29
.
618
.
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
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