19
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
3.17 VARIABLE HEAT POWER.
N.B.:
Gas flow rates refer to heating power be-
low a temperature of 15°C and at a pressure of
1013 mbar. Burner pressure values refer to use
of gas at 15°C.
3.18 COMBUSTION PARAMETERS.
G20
G30
G31
Gas nozzle diameter
mm
1,30
0,80
0,80
supply pressure
mbar (mm H
2
O)
20 (204)
29 (296)
37 (377)
Mass flow of fumes at nominal power
kg/h
68
65
69
Mass flow of fumes at min. power
kg/h
60
60
69
CO
2
at Q. Nom./Min.
%
5,35 / 1,80
6,50 / 2,10
6,10 / 1,80
CO at 0% di O
2
at Q. Nom./Min.
ppm
79 / 86
151 / 100
95 / 137
NO
X
at 0% di O
2
at Q. Nom./Min.
ppm
58 / 12
110 / 15
97 / 12
Temperature of fumes at nominal output
°C
101
106
102
Temperature of fumes at minimum output
°C
85
85
76
METHANE (G20)
BUTANE (G30)
PROPANE (G31)
HEATING
POWER
HEATING
POWER
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)
23,6
20296
MAX.
2,74
14,00
142,8
2,05
28,00
285,5
2,01
35,60
363,0
9,5
8170
MIN CEN.
HEAT.
1,14
2,77
28,3
0,85
5,00
51,0
0,84
6,43
65,5
7,0
6020
MIN
D.H.W.
0,86
1,70
17,3
0,64
3,00
30,6
0,63
3,00
30,6
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