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3.20 VARIABLE HEAT POWER.
N.B.: the pressures indicated in the table represent 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 chamber (see pressure test 18 and 19 Fig. 1-25).
The adjustments must be performed using a digital differential manometer
HEAT
OUTPUT
(kW)
(kcal/h)
26,0
22360
25,0
21500
D.H.W.
24,0
20640
23,6
20296
22,0
18920
21,3
18354
20,0
17200
19,0
16340
18,0
15480
17,0
14620
16,0
13760
15,0
12900
14,0
12040
CEN.
HEAT.
13,0
11180
+
D.H.W.
12,0
10320
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
3.21 COMBUSTION PARAMETERS.
Gas nozzle diameter
supply pressure
Flue flow rate at max heat output
Flue flow rate at min heat output
CO
at Nom Q./Min.
2
CO with 0% O
at Nom Q /Min.
2
NO
with 0% O
at Nom Q /Min.
X
2
Flue temperature at nominal output
Flue temperature at minimum output
METHANE (G20)
BURNER
PRESS. BURNER
GAS FLOW RATE
NOZZLES
(m
/h)
(mbar) (mm H
O)
3
2
2,82
5,10
52,0
2,71
4,69
47,8
2,60
4,30
43,9
2,55
4,15
42,4
2,38
3,59
36,6
2,30
3,37
34,3
2,16
2,94
30,0
2,05
2,65
27,0
1,94
2,37
24,2
1,84
2,11
21,5
1,73
1,87
19,0
1,62
1,64
16,7
1,52
1,43
14,6
1,41
1,23
12,6
1,30
1,05
10,7
1,20
0,88
9,0
1,09
0,73
7,5
0,98
0,60
6,1
0,88
0,48
4,9
0,77
0,37
3,8
0,66
0,28
2,9
0,55
0,21
2,1
0,44
0,15
1,6
0,33
0,11
1,1
mbar (mm H
IE
with a scale in tenths of mm or Pascal. The power data in the table has been
obtained with intake-exhaust pipe 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
PRESS. BURNER
GAS FLOW RATE
NOZZLES
(kg/h)
(mbar) (mm H
2,11
5,10
52,0
2,02
4,70
47,9
1,94
4,32
44,0
1,91
4,17
42,5
1,77
3,61
36,8
1,72
3,40
34,6
1,61
2,98
30,4
1,53
2,69
27,4
1,45
2,41
24,6
1,37
2,16
22,0
1,29
1,92
19,5
1,21
1,69
17,2
1,13
1,48
15,1
1,05
1,28
13,1
0,97
1,10
11,2
0,89
0,94
9,5
0,81
0,78
8,0
0,73
0,65
6,6
0,65
0,53
5,4
0,57
0,42
4,3
0,49
0,33
3,3
0,41
0,25
2,5
0,33
0,19
1,9
0,25
0,14
1,4
G20
mm
5,60
O)
20 (204)
2
kg/h
42
kg/h
5
%
9,50 / 8,90
ppm
211 / 4
mg/kWh
64 / 21
°C
57
°C
58
140
PROPANE (G31)
BURNER
PRESS. BURNER
GAS FLOW RATE
NOZZLES
O)
(kg/h)
(mbar) (mm H
2
2,07
7,50
1,99
6,92
1,91
6,37
1,87
6,15
1,74
5,34
1,69
5,03
1,58
4,42
1,51
4,00
1,43
3,60
1,35
3,22
1,27
2,86
1,19
2,53
1,11
2,22
1,03
1,93
0,96
1,66
0,88
1,41
0,80
1,18
0,72
0,98
0,64
0,79
0,56
0,62
0,49
0,48
0,41
0,35
0,33
0,25
0,25
0,17
G30
G31
4,00
4,00
29 (296)
37 (377)
38
43
5
5
12,30 / 11,60
10,60 / 10,20
670 / 4
190 / 3
250 / 29
66 / 11
63
57
64
59
O)
2
76,5
70,6
64,9
62,7
54,5
51,3
45,1
40,8
36,7
32,8
29,2
25,8
22,6
19,7
16,9
14,4
12,1
10,0
8,1
6,4
4,9
3,6
2,6
1,7
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