3 About the unit
Installation Manual
7
D2CNL024A1AA
Wall-mounted condensing boiler
3P469346-12R – 2021.09
3.4
Technical specifications
Technical specifications
Unit
D2CNL024A1AA
Heat Input Range(Qn)
kW
4~23.5
Nominal Heat Output Range (Pn) at 80-60°C
kW
3.8~22.8
Nominal Heat Output Range (Pn) at 50-30°C
kW
4.4~24
Efficiency (30% partial load at 30°C return temperature)
%
109
Central Heating Circuit
Operating Pressure (min./max.)
bar
0.6 / 3.0
Heating Circuit Temperature Interval (min./max.)
°C
30 / 80
Domestic Hot Water Circuit
Hot Water Amount DT: 30°C
l/min
12
Hot Water Amount DT: 35°C
l/min
10.3
Water Installation Pressure (min./max.)
MPa
0.05 / 1
Domestic Hot Water Temperature Interval (min./max.)
°C
35 / 60
Domestic Hot Water Circuit Type
—
instantaneous
General
Expansion Vessel Initial Pressure
bar
1
Expansion Vessel Capacity
l
7
Electrical Connection
V AC/Hz
230/50
Electrical Power Consumption (max.)
W
100
Standby Electrical Power Consumption
W
2.5
IP Rating
—
IPX4D
Boiler Weight
kg
27
Boiler Dimensions (Height × Width × Depth)
mm
590 × 400 × 256
Flue outlet diameter
mm
60 / 100
Combustion specifications
Unit
D2CNL024A1AA
Gas Category
—
I
2H
Nominal Gas Inlet Pressure (G20/G25/G31)
mbar
20
G20 Gas Inlet Pressure (min./max.)
mbar
17 / 25
Natural Gas (G20) Consumption (min./max.)
m³/h
0.4 / 2.5
Combustion products mass flow rate (min./max.) (G20)
g/s
1.88 / 10.4
Combustion products temperature (min./max.) (G20)
°C
56 / 77
Maximum combustion products temp. at nominal heat input
°C
90
CO
2
Emission at nominal and minimum heat input (G20)
%
8.7 / 9.3±0.2
NOx Class
—
6
Energy-related products (ErP) specifications
Symbol
Unit
D2CNL024A1AA
Model
—
—
D2CNL024
Condensing boiler
—
—
YES
Low-temperature
(b)
boiler
—
—
NO
B1 boiler
—
—
NO
Cogeneration space heater
—
—
NO
Combination heater
—
—
YES
Central heating efficiency class
—
—
A
Rated heat output
P
rated
kW
23
Useful heat output at rated heat output and high-temperature regime
(a)
P
4
kW
22.7
Useful heat output at 30% of rated heat output and low-temperature regime
(b)
P
1
kW
7.7
Seasonal space heating energy efficiency
η
s
%
93
Useful efficiency at rated heat output and high-temperature regime
(a)
η
4
%
87.9
Useful efficiency at 30% of rated heat output and low-temperature regime
(b)
η
1
%
98.2
Auxiliary electricity consumption
At full load
el
max
kW
0.041
At part load
el
min
kW
0.016
In standby mode
P
SB
kW
0.0025
Other items
Standby heat loss
P
stby
kW
0.053
Ignition burner power consumption
P
ign
kW
—
Annual energy consumption
Q
HE
kWh
11355
Sound power level, indoors (at maximum heat input)
L
WA
dB
51
Emissions of nitrogen oxides
NO
x
mg/kWh
42
Domestic hot water parameters
Declared load profile
—
—
XL
Energy-related products (ErP) specifications
Symbol
Unit
D2CNL024A1AA
Daily electricity consumption
Q
elec
kWh
0.18
Annually electricity consumption
AEC
kWh
40
Water heating energy efficiency
ŋ
wh
%
87
Water heating energy efficiency class
—
—
A
Daily fuel consumption
Q
fuel
kWh
22.08
Annual fuel consumption
AFC
GJ
17
(a)
High-temperature regime means 60°C return temperature at heater inlet and 80°C feed temperature at heater outlet.
