20
INS
T
ALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
3.17 COMBUSTION PARAMETERS.
- Flue gas temperature values refer to an air inlet
temperature of 15°C.
- The data relevant to domestic hot water perfor-
mance refer to a dynamic inlet pressure of 2 bar
and an inlet temperature of 15°C; the values are
measured directly at the boiler outlet consider-
ing that to obtain the data declared mixing with
cold water is necessary.
- The maximum sound level emitted during
boiler operation is
<
55dBA. The sound level
value is referred to semianechoic chamber tests
with boiler operating at max. heat output, with
extension of flue gas exhaust system according
to product standards.
3.18 TECHNICAL DATA.
Nominal heat input
kW (kcal/h)
26,3 (22614)
DHW minimum heat input
kW (kcal/h)
8,3 (7124)
CH minimum heat input
kW (kcal/h)
11,0 (9489)
Nominal heat output (useful)
kW (kcal/h)
23,6 (20296)
DHW minimum heat output (useful)
kW (kcal/h)
7,0 (6020)
CH minimum heat output (useful)
kW (kcal/h)
9,5 (8170)
Efficiency at nominal heat output
%
89,8
Efficiency at 30
%
nominal heat output load
%
86,5
Heat loss at case with burner On/Off
%
2,40 / 1,25
Heat loss at flue with burner On/Off
%
7,90 / 0,10
Central heating circuit max. operating pressure
bar
3
Central heating circuit max. operating temperature
°C
90
Adjustable central heating temperature
°C
38 - 85
System expansion vessel total volume
l
4,2
Expansion vessel factory-set pressure
bar
1
Water content in generator
l
1,9
Head available with 1000 l/h flow rate
kPa (m H
2
O)
32,4 (2,5)
Hot water production useful heat output
kW (kcal/h)
23,6 (20296)
Domestic hot water adjustable temperature
°C
30 (38) - 60 (77)
Domestic hot water circuit flow limiter at 2 bar
l/min
7,7
Domestic circuit min. pressure (dynamic)
bar
0,3
Domestic hot water circuit max. working pressure
bar
10
Minimum D.H.W. flow rate
l/min
1,5
Specific flow rate (
∆
T 30°C)
l/min
11,1
Flow rate capacity in continuous duty (
∆
T 30°C)
l/min
- - -
Weight of full boiler
kg
26,1
Weight of empty boiler
kg
24,2
Electrical connection
V/Hz
230/50
Nominal absorption
A
0,4
Installed electric output
W
55
Pump consumption
W
39
Value EEI
-
≤
0,20 - Part. 3
Equipment electrical system protection
-
IPX4D
Boiler flue circuit resistance
Pa
1,3
NO
X
class
-
1
Weighted NO
X
mg/kWh
260
Weighted CO
mg/kWh
93
Type of appliance
B11BS
Category
II2H3
+
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)
Flue flow rate at nominal heat output
kg/h
71
69
71
Flue flow rate at min heat output
kg/h
61
55
58
CO
2
at Nom./Min.
Q
.
%
5.20 / 1.80
6.20 / 2.34
6.00 / 2.21
CO with 0
%
O
2
at Nom./Min.
Q
.
ppm
61 / 85
104 / 96
64 / 106
NO
X
with 0
%
of O
2
at Nom./Min.
Q
.
mg/kWh
147 / 88
242 / 106
242 / 98
Flue temperature at nominal output
°C
112
116
114
Flue temperature at minimum output
°C
91
80
96
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