58
INS
TALLER
U
SER
M
AINTEN
AN
CE
TECHNI
CI
AN
TECHNI
CAL
D
AT
A
4.2 COMBUSTION PARAMETERS
Gas type
G20
G31
Supply pressure
mbar (mm H2O)
20 (204)
37 (377)
Gas nozzle diameter
mm
0.82
0.48
Flue flow rate at D.H.W. nominal heat output
kg/h (g/s)
47 (13.13)
50 (13.81)
Flue flow rate at heating nominal heat output
kg/h (g/s)
50 (13.81)
51 (14.14)
Flue flow rate at min heat output
kg/h (g/s)
34.18 (9.85)
33.12 (10.01)
CO2 to nominal Q.
%
7.3 (± 0,2)
7.9 (± 0,2)
CO2 to ignition Q.
%
3.95 (± 0,2)
4.7 (± 0,2)
CO2 to minimum Q.
%
3.95 (± 0,2)
4.7 (± 0,2)
CO with 0% O2 at Nom./Min. Q.
ppm
121 / 25
92 / 38
NOx with 0% O2 at Nom./Min. Q.
mg/kWh
55 / 25
42 / 26
Flue temperature at nominal output
°C
70
69
Flue temperature at minimum output
°C
70
67
Max air combustion temperature
°C
50
50
Combustion parameters: measuring conditions of useful efficiency (flow temperature/return temperature= 80 / 60 °C), ambient tempe-
rature reference = 15°C.
Concentric intake/exhaust available head
with
flue gas diaphragm Ø80
Concentric intake/exhaust available head
with
flue gas diaphragm Ø77
Concentric intake/exhaust
available head
without diaphragm
Pa
Pa
Pa
33
43
60
Ø80 flexible intake/exhaust available head
with Ø45 flue diaphragm
Ø80 flexible intake/exhaust available head
with Ø55 flue diaphragm
Pa
Pa
24
80
