Daikin D2C20ND028A5AA, Installation Manual

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3 About the unit
Installation manual
7
D2C20ND0 D2C24ND035A5AA
Wall-mounted condensing boiler
3P469346-10J – 2018.05
3.4 Technical specifications
Technical specifications Unit D2C20ND028A5AA D2C24ND035A5AA
Heat Input Range(Qn) kW 4.8~19.2 4.8~23.5
Nominal Heat Output Range (Pn) at 80-60°C kW 4.6~18.8 4.6~22.9
Nominal Heat Output Range (Pn) at 50-30°C kW 5.2~20.0 5.2~24.0
Efficiency (30% partial load at 30°C return temperature) % 108.9 109.1
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
Comfort Class (EN13203) — ***
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 10
Electrical Connection V AC/Hz 230/50
Electrical Power Consumption (max.) W 92 112
Standby Electrical Power Consumption W 2.7
IP Rating — IPX5D
Boiler Weight kg 37
Boiler Dimensions (Height x Width x Depth) mm 695 x 440 x 295
Flue outlet diameter mm 60 / 100
Combustion specifications Unit D2C20ND028A5AA D2C24ND035A5AA
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 / 2.04 0.51 / 2.45
Natural Gas (G25) Consumption (min./max.) m³/h 0.59 / 2.35 0.59 / 2.85
LPG (G31) Consumption (min./max.) m³/h 0.2 / 0.98 0.2 / 1.19
Combustion products mass flow rate (min./max.) (G20) g/s 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
Combustion products temperature (min./max.) (G20) °C 57.5 / 76.4 57.5 / 81.7
Combustion products temperature (min./max.) (G31) °C 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 D2C20ND028A5AA D2C24ND035A5AA
Model — — D2C20ND028 D2C24ND035
Condensing boiler — — YES YES
Low-temperature
(b)
boiler — — NO NO
B1 boiler — — NO NO
Cogeneration space heater — — NO NO
Combination heater — — YES YES
Central heating efficiency class — — ****/A
Rated heat output P
rated
kW 19 23
Useful heat output at rated heat output and high-temperature regime (a) P
4
kW 18.8 22.9
Useful heat output at 30% of rated heat output and low-temperature regime (b) P
1
kW 6.3 7.7
Seasonal space heating energy efficiency η
s
% 93
Useful efficiency at rated heat output and high-temperature regime
(a)
η
4
% 88.1 87.9
Useful efficiency at 30% of rated heat output and low-temperature regime
(b)
η
1
% 98.1 98.2
Auxiliary electricity consumption
At full load el
max
kW 0.0292 0.0311
At part load el
min
kW 0.0087 0.0093
In standby mode P
SB
kW 0.004
Other items
Standby heat loss P
stby
kW 0.0651
Ignition burner power consumption P
ign
kW —
Annual energy consumption Q
HE
GJ 36 43
Sound power level, indoors (at maximum heat input) L
WA
dB 50 53
Emissions of nitrogen oxides NO
x
mg/kWh 31 32