140
IE
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
METHANE (G20)
BUTANE (G30)
PROPANE (G31)
HEAT
OUTPUT
BURNER
GAS FLOW RATE
PRESS. BURNER
NOZZLES
BURNER
GAS FLOW RATE
PRESS. BURNER
NOZZLES
BURNER
GAS FLOW RATE
PRESS. BURNER
NOZZLES
(kW)
(kcal/h)
(m
3
/h)
(mbar) (mm H
2
O)
(kg/h)
(mbar) (mm H
2
O)
(kg/h)
(mbar) (mm H
2
O)
26,0
22360
D.H.W.
2,82
5,10
52,0
2,11
5,10
52,0
2,07
7,50
76,5
25,0
21500
2,71
4,69
47,8
2,02
4,70
47,9
1,99
6,92
70,6
24,0
20640
2,60
4,30
43,9
1,94
4,32
44,0
1,91
6,37
64,9
23,6
20296
CEN.
HEAT.
+
D.H.W.
2,55
4,15
42,4
1,91
4,17
42,5
1,87
6,15
62,7
22,0
18920
2,38
3,59
36,6
1,77
3,61
36,8
1,74
5,34
54,5
21,3
18354
2,30
3,37
34,3
1,72
3,40
34,6
1,69
5,03
51,3
20,0
17200
2,16
2,94
30,0
1,61
2,98
30,4
1,58
4,42
45,1
19,0
16340
2,05
2,65
27,0
1,53
2,69
27,4
1,51
4,00
40,8
18,0
15480
1,94
2,37
24,2
1,45
2,41
24,6
1,43
3,60
36,7
17,0
14620
1,84
2,11
21,5
1,37
2,16
22,0
1,35
3,22
32,8
16,0
13760
1,73
1,87
19,0
1,29
1,92
19,5
1,27
2,86
29,2
15,0
12900
1,62
1,64
16,7
1,21
1,69
17,2
1,19
2,53
25,8
14,0
12040
1,52
1,43
14,6
1,13
1,48
15,1
1,11
2,22
22,6
13,0
11180
1,41
1,23
12,6
1,05
1,28
13,1
1,03
1,93
19,7
12,0
10320
1,30
1,05
10,7
0,97
1,10
11,2
0,96
1,66
16,9
11,0
9460
1,20
0,88
9,0
0,89
0,94
9,5
0,88
1,41
14,4
10,0
8600
1,09
0,73
7,5
0,81
0,78
8,0
0,80
1,18
12,1
9,0
7740
0,98
0,60
6,1
0,73
0,65
6,6
0,72
0,98
10,0
8,0
6880
0,88
0,48
4,9
0,65
0,53
5,4
0,64
0,79
8,1
7,0
6020
0,77
0,37
3,8
0,57
0,42
4,3
0,56
0,62
6,4
6,0
5160
0,66
0,28
2,9
0,49
0,33
3,3
0,49
0,48
4,9
5,0
4300
0,55
0,21
2,1
0,41
0,25
2,5
0,41
0,35
3,6
4,0
3440
0,44
0,15
1,6
0,33
0,19
1,9
0,33
0,25
2,6
3,0
2580
0,33
0,11
1,1
0,25
0,14
1,4
0,25
0,17
1,7
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.
3.21 COMBUSTION PARAMETERS.
G20
G30
G31
Gas nozzle diameter
mm
5,60
4,00
4,00
supply pressure
mbar (mm H
2
O)
20 (204)
29 (296)
37 (377)
Flue flow rate at max heat output
kg/h
42
38
43
Flue flow rate at min heat output
kg/h
5
5
5
CO
2
at Nom Q./Min.
%
9,50 / 8,90
12,30 / 11,60
10,60 / 10,20
CO with 0% O
2
at Nom Q /Min.
ppm
211 / 4
670 / 4
190 / 3
NO
X
with 0% O
2
at Nom Q /Min.
mg/kWh
64 / 21
250 / 29
66 / 11
Flue temperature at nominal output
°C
57
63
57
Flue temperature at minimum output
°C
58
64
59
