37
INS
T
ALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
3.21 VARIABLE HEAT OUTPUT.
N.B.:
the power data in the table has been ob-
tained with intake-exhaust pipe measuring 0.5 m
in length. Gas flow rates refer to net heating value
below a temperature of 15°C and at a pressure
of 1013 mbar.
3.22 COMBUSTION PARAMETERS.
G20
G31
Supply pressure
mbar (mm H
2
O)
20 (204)
37 (377)
Gas nozzle diameter
mm
5,15
5,15
Flue flow rate at nominal heat output
kg/h
35
36
Flue flow rate at min heat output
kg/h
5
5
CO
2
at Q. Nom./Min.
%
9,10 / 9,00
10,10 / 10,00
CO with 0% O
2
at Nom./Min. Q. Nom./Min.
ppm
115 / 10
205 / 10
NO
X
at 0% of O
2
at Q. Nom./Min.
mg/kWh
35 / 20
30 / 25
Flue temperature at nominal output
°C
80
84
Flue temperature at minimum output
°C
53
56
METHANE (G20)
PROPANE (G31)
THERMAL POWER
THERMAL POWER
MODULATION
BURNER GASFLOW RATE
BURNER GASFLOW RATE
(kW)
(kcal/h)
(%)
(m
3
/h)
(kg/h)
20,5
17630
85
2,25
1,65
20,0
17200
83
2,20
1,61
19,0
16340
78
2,08
1,53
18,0
15480
74
1,97
1,45
17,0
14620
69
1,86
1,36
16,0
13760
65
1,75
1,28
15,0
12900
60
1,64
1,20
14,0
12040
55
1,53
1,12
13,0
11180
51
1,42
1,04
12,0
10320
46
1,30
0,96
11,0
9460
41
1,19
0,88
10,0
8600
36
1,09
0,80
9,0
7740
31
0,98
0,72
8,0
6880
26
0,87
0,64
7,0
6020
21
0,76
0,56
6,0
5160
16
0,65
0,48
5,0
4300
11
0,54
0,40
4,0
3440
5
0,43
0,32
3,0
2580
0
0,00
0,00
