58
4
TECHNICAL DATA.
4.1 VARIABLE HEAT OUTPUT.
N.B.:
the power data provided in the table are obtained with 0.5
m long intake/exhaust pipe.
Gas flow rates refer to net calorific value at a temperature of 15°C
and at a pressure of 1013 mbar.
METHANE (G20)
PROPANE (G31)
PROP. AIR (G230)
POWER
THERMAL
POWER
THERMAL
MODULA-
TION
GAS FLOW RATE
BURNER
MODULA-
TION
GAS FLOW RATE
BURNER
MODULA-
TION
GAS FLOW RATE
BURNER
(kW)
(kcal/h)
(%)
(m
3
/h)
(%)
(kg/h)
(%)
(kg/h)
28.3
24295
D.H.W.
99
3.06
99
2.25
99
2.38
27.5
23650
97
2.98
97
2.19
97
2.31
26.5
22790
93
2.87
92
2.11
94
2.23
25.5
21930
89
2.76
88
2.03
90
2.14
24.1
20717
CH.
+
D.H.W.
85
2.61
82
1.91
85
2.02
23.5
20210
81
2.54
80
1.87
83
1.97
22.5
19350
78
2.44
75
1.79
79
1.89
21.5
18490
74
2.33
71
1.71
75
1.81
20.5
17630
70
2.22
67
1.63
71
1.72
19.5
16770
66
2.11
63
1.55
68
1.64
18.5
15910
62
2.01
59
1.47
64
1.56
17.5
15050
58
1.90
55
1.39
60
1.47
16.5
14190
54
1.79
51
1.31
56
1.39
15.5
13330
50
1.68
47
1.24
52
1.31
14.5
12470
45
1.58
42
1.16
47
1.22
13.5
11610
41
1.47
38
1.08
43
1.14
12.5
10750
37
1.36
34
1.00
39
1.06
11.5
9890
33
1.26
30
0.92
35
0.97
10.5
9030
29
1.15
26
0.84
30
0.89
9.5
8170
24
1.04
22
0.76
26
0.81
8.5
7310
20
0.93
18
0.68
21
0.72
7.5
6450
16
0.82
14
0.61
17
0.64
6.5
5590
11
0.72
10
0.53
12
0.56
5.5
4730
7
0.61
6
0.45
7
0.47
4.5
3870
2
0.50
2
0.37
2
0.39
4.3
3689
1
0.48
1
0.35
1
0.37
4.2 COMBUSTION PARAMETERS.
Combustion parameters: measuring conditions of useful efficien-
cy (flow temperature/return temperature= 80 / 60 °C), ambient
temperature reference = 15°C.
G20
G31
G230
Supply pressure
mbar (mm H
2
O)
20 (204)
37 (377)
20 (204)
Gas nozzle diameter
mm
5.00
3.80
5.60
Flue flow rate at nominal DHW/heat output
kg/h (g/s)
44 (12.22) - 38 (10.55) 43 (11.94) - 37 (10.27) 49 (13.61) - 41 (11.38)
Flue flow rate at min heat output
kg/h (g/s)
8 (2.22)
7 (1.94)
8 (2.22)
CO
2
at Nom./Min. Q.
%
9.70 (- 0.2 / + 0.5) /
8.80 (- 0.3 / + 0.2)
11.40 (- 0.3 / + 0.1)/
10.60 (- 0.1 / + 0.3)
11.00 (- 0.3 / + 0.1)/
10.00 (- 0.1 / + 0.3)
CO with 0% O
2
at Nom./Min. Q.
ppm
360 / 7
560 / 9
386 / 12
NO
X
with 0% O
2
at Nom./Min. Q.
mg/kWh
65 / 22
81 / 55
80 / 52
Flue temperature at nominal output
°C
70
70
62
Flue temperature at minimum output
°C
64
63
58
Max air combustion temperature
°C
50
50
50
