3 About the unit
Installation manual
8
D035A1/4AA + D035A4AA
Wall-mounted condensing boiler
3P469346-5E – 2017.06
3.4
Technical specifications
Technical specifications
Unit
D2CND028A*AA
D2CND035A*AA
D2TND028A4AA
D2TND035A4AA
Heat Input Range(Qn)
kW
4.8~27.0
4.8~34.0
4.8~27.0
4.8~34.0
Nominal Heat Output Range (Pn) at 80-60°C
kW
4.6~26.3
4.6~33.2
4.6~26.3
4.6~33.2
Nominal Heat Output Range (Pn) at 50-30°C
kW
5.2~28.2
5.2~35.0
5.2~28.2
5.2~35.0
Efficiency (30% partial load at 30°C return temperature)
%
108.9
108.7
108.9
108.7
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
14
16
—
Hot Water Amount DT: 35°C
l/min
12
14
—
Water Installation Pressure (min./max.)
bar
0.5 / 10.0
—
Domestic Hot Water Temperature Interval (min./max.)
°C
35 / 60
Domestic Hot Water Circuit Type
—
instantaneous
storage tank
General
Expansion Vessel Initial Pressure
bar
1
Expansion Vessel Capacity
l
10
Electrical Connection
V AC/Hz
230/50
Electrical Power Consumption (max.)
W
92
112
92
112
Standby Electrical Power Consumption
W
2.7
Electrical Protection Class
—
IPX5D
Boiler Weight
kg
37
35.5
Boiler Dimensions (Height x Width x Depth)
mm
695 x 440 x 295
Flue outlet diameter
mm
60 / 100
Combustion specifications
Unit
D2CND028A*AA
D2CND035A*AA
D2TND028A4AA
D2TND035A4AA
Gas Category
—
II
2N3P
Nominal Gas Inlet Pressure (G20/G25/G31)
mbar
20 / 37
G20 Gas Inlet Pressure (min./max.)
mbar
17 / 25
(a)
G25 Gas Inlet Pressure (min./max.)
mbar
20 / 31
G31 Gas Inlet Pressure (min./max.)
mbar
25 / 45
Natural Gas (G20) Consumption (min./max.)
m³/h
0.51 / 2.89
0.51 / 3.63
0.51 / 2.89
0.51 / 3.63
Natural Gas (G25) Consumption (min./max.)
m³/h
0.59 / 3.32
0.59 / 4.19
0.59 / 3.32
0.59 / 4.19
LPG (G31) Consumption (min./max.)
m³/h
0.2 / 1.09
0.2 / 1.38
0.2 / 1.09
0.2 / 1.38
Combustion products mass flow rate (min./max.) (G20)
g/s
2.2 / 12.35
2.2 / 15.47
2.2 / 12.35
2.2 / 15.47
Combustion products mass flow rate (min./max.) (G31)
g/s
2.2 / 12.02
2.2 / 15.22
2.2 / 12.02
2.2 / 15.22
Combustion products temperature (min./max.) (G20)
°C
57.5 / 76.4
57.5 / 81.7
57.5 / 76.4
57.5 / 81.7
Combustion products temperature (min./max.) (G31)
°C
57.5 / 74.5
57.2 / 80.2
57.5 / 74.5
57.2 / 80.2
CO
2
Emission at nominal and minimum heat input (G20)
%
8.8±0.8
CO
2
Emission at nominal and minimum heat input (G31)
%
11.3 / 10.2±1.0
NOx Class
—
6
(a)
20 / 30 for Hungary
Energy-related products (ErP) specifications
Symbol
Unit
D2CND028A*AA
D2CND035A*AA
D2TND028A4AA
D2TND035A4AA
Model
—
—
D2CND028
D2CND035
D2TND028
D2TND035
Condensing boiler
—
—
YES
YES
YES
YES
Low-temperature
(b)
boiler
—
—
NO
NO
NO
NO
B1 boiler
—
—
NO
NO
NO
NO
Cogeneration space heater
—
—
NO
NO
NO
NO
Combination heater
—
—
YES
YES
NO
NO
Central heating efficiency class
—
—
****/A
Rated heat output
P
rated
kW
26
33
26
33
Useful heat output at rated heat output and high-temperature regime
(a)
P
4
kW
26.3
33.2
26.3
33.2
Useful heat output at 30% of rated heat output and low-temperature regime
(b)
P
1
kW
8.8
11.1
8.8
11.1
Seasonal space heating energy efficiency
η
s
%
93
Useful efficiency at rated heat output and high-temperature regime
(a)
η
4
%
87.8
87.9
87.8
87.9
Useful efficiency at 30% of rated heat output and low-temperature regime
(b)
η
1
%
98.1
97.9
98.1
97.9
Auxiliary electricity consumption
At full load
el
max
kW
0.0356
0.0547
0.0356
0.0547
At part load
el
min
kW
0.0098
0.0111
0.0098
0.0111
In standby mode
P
SB
kW
0.0026
Other items
Standby heat loss
P
stby
kW
0.0651
Ignition burner power consumption
P
ign
kW
—
Annual energy consumption
Q
HE
GJ
48
58
48
58
Sound power level, indoors (at maximum heat input)
L
WA
dB
49
52
49
52
Emissions of nitrogen oxides
NO
x
mg/kWh
36
35
36
35
Domestic hot water parameters
Declared load profile
—
—
XL
—
