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3.17 VARIABLE HEAT OUTPUT.
N.B.: the pressures indicated in the table repre-
sent the differences of pressures at the ends of
the Venturi mixer and can be measured from
the pressure point in the upper part of the sealed
HEAT
HEAT
OUTPUT
OUTPUT
(kW)
(kcal/h)
26,0
22360
25,0
21500
D.H.W.
24,0
20640
23,6
20253
22,0
18920
21,7
18689
20,0
17200
19,0
16340
18,0
15480
17,0
14620
16,0
13760
15,0
12900
CEN.
14,0
12040
HEAT.
13,0
11180
+
12,0
10320
D.H.W.
11,0
9460
10,0
8600
9,0
7740
8,0
6880
7,0
6020
6,0
5160
5,0
4300
4,0
3440
3,0
2580
3.18 COMBUSTION PARAMETERS.
Supply pressure
Gas nozzle diameter
Flue flow rate at nominal heat output
Flue flow rate at min heat output
CO
at Q. Nom./Min.
2
CO at 0% of O
at Nom. Q./Min.
2
NO
at 0% of O
at Nom.Q./Min.
X
2
Flue temperature at nominal output
Flue temperature at minimum output
chamber (see pressure test 39 and 40 Fig. 1-23).
The adjustments must be performed using a
digital differential manometer with a scale in
tenths of mm or Pascal. The power data in the
table has been obtained with intake-exhaust pipe
METHANE (G20)
BURNER GAS
PRESS. NOZZLES
FLOW RATE
PRESSURE
(m
/h)
(mbar) (mm H
O)
3
2
2,85
5,80
59,1
2,74
5,39
54,9
2,62
4,99
50,9
2,57
4,82
49,1
2,40
4,25
43,4
2,37
4,16
42,4
2,18
3,58
36,6
2,07
3,27
33,4
1,96
2,98
30,4
1,86
2,70
27,5
1,75
2,43
24,8
1,64
2,18
22,2
1,54
1,94
19,8
1,43
1,71
17,5
1,32
1,50
15,3
1,21
1,31
13,3
1,11
1,12
11,4
1,00
0,95
9,7
0,89
0,79
8,1
0,78
0,65
6,6
0,67
0,51
5,2
0,56
0,40
4,0
0,45
0,29
3,0
0,34
0,20
2,0
mbar (mm H
measuring 0.5 m in length. Gas flow rates refer
to heating values below a temperature of 15°C
and at a pressure of 1013 mbar. Burner pressure
values refer to use of gas at 15°C.
BUTANE (G30)
BURNER GAS
PRESS. NOZZLES
FLOW RATE
PRESSURE
(kg/h)
(mbar) (mm H
2
2,13
5,85
59,7
2,04
5,43
55,4
1,96
5,03
51,3
1,92
4,86
49,5
1,79
4,29
43,7
1,77
4,19
42,7
1,63
3,61
36,8
1,55
3,29
33,6
1,47
2,99
30,5
1,39
2,71
27,6
1,31
2,44
24,8
1,23
2,18
22,2
1,15
1,94
19,7
1,07
1,71
17,4
0,99
1,49
15,2
0,91
1,29
13,2
0,83
1,10
11,2
0,75
0,93
9,4
0,66
0,76
7,8
0,58
0,61
6,3
0,50
0,48
4,9
0,42
0,35
3,6
0,34
0,25
2,5
0,25
0,15
1,5
G20
O)
20 (204)
2
mm
5,60
kg/h
42
kg/h
5
%
9,50 / 9,00
ppm
235 / 3
mg/kWh
44 / 12
°C
62
°C
49
PROPANE (G31)
BURNER GAS
PRESS. NOZZLES
FLOW RATE
PRESSURE
O)
(kg/h)
(mbar) (mm H
2,09
7,61
77,6
2,01
7,08
72,2
1,93
6,56
66,9
1,89
6,34
64,7
1,76
5,61
57,2
1,74
5,49
56,0
1,60
4,74
48,3
1,52
4,33
44,2
1,44
3,94
40,2
1,36
3,58
36,5
1,28
3,23
32,9
1,21
2,89
29,5
1,13
2,58
26,3
1,05
2,28
23,2
0,97
2,00
20,4
0,89
1,73
17,7
0,81
1,48
15,1
0,73
1,25
12,7
0,65
1,03
10,5
0,57
0,83
8,5
0,49
0,65
6,6
0,41
0,48
4,9
0,33
0,33
3,4
0,25
0,20
2,0
G30
G31
29 (296)
37 (377)
4,00
4,00
38
43
5
5
12,30 / 11,80
10,60 / 10,10
680 / 4
220 / 4
148 / 26
35 / 13
68
62
54
49
PL
CZ
HU
O)
RO
2
IE
SK
151
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