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LR, LRK, LR-NT, LRK-NT 21 - 32
We reserve the right to make changes to dimensions and construction 17 edition 30.10.2007
Technical specifications LR (natural gas, low NOx) with ARF
LR 21 22 23 24 25 26 27 28 29 30 31 32
Power
Boiler nominal power qN (80/60°C)
max.
4
380 430 470 585 600 755 935 935 1185 1455 1865 2325
min.
4
84 108 108 148 148 215 263 263 308 389 560 569
Calorific power qF
max. 413 463 509 632 649 814 1009 1009 1285 1577 2011 2535
min.
3
88 113 113 155 155 224 275 275 321 406 584 594
Modulation rate
3
21% 24% 22% 25% 24% 28% 27% 27% 25% 26% 29% 23%
Efficiencies
Overall efficiency 60 / 80 °C
100%
%
92.0 92.8 92.4 92.6 92.4 92.7 92.6 92.6 92.2 92.3 92.7 91.7
Overall efficiency 60 / 80 °C
30%
%
95.4 95.5 95.5 95.6 95.6 95.8 95.8 95.8 95.7 95.7 96.0 95.7
Mass flows
Gas flow, NG type E
max.
1,2
41.5 46.5 51.0 63.4 65.1 81.7 101.3 101.3 128.9 158.3 201.7 254.3
min.
1,2
8.8 11.4 11.4 15.5 15.5 22.5 27.6 27.6 32.2 40.8 58.6 59.6
Exhaust gas mass flow
max. wet 0.17 0.19 0.21 0.26 0.27 0.34 0.42 0.42 0.54 0.66 0.84 1.06
min. wet 0.04 0.05 0.05 0.06 0.06 0.09 0.12 0.12 0.14 0.17 0.24 0.25
Exhaust gas data, losses
Overpressure combustion chamber
max.
mbar
4.27 3.20 3.85 4.85 5.12 5.44 6.00 6.00 6.89 7.79 7.68 7.71
Exhaust gas temperature ati 80/60 °C
max. 184 167 177 173 175 168 171 171 180 179 169 189
min.
3
97 98 98 97 97 97 98 98 99 100 98 99
Exhaust gas losses at 80/60 °C
max.
%
7.76.97.47.27.37.07.27.27.67.67.18.0
Stand-by loss qB
70 °C
W
780 883 883 1020 1020 1178 1382 1382 1565 1742 2073 2330
Hydraulic data
Water resistance
Δt=10K
22 28 33 51 54 85 54 54 86 63 103 50
Δt=20K
6 7 8 13 14 21 14 14 21 16 26 13
Water flow
max. 32.6 36.9 40.4 50.3 51.6 64.9 80.3 80.3 101.8 125.0 160.2 199.8
Operating temperatures
max.
SCO
Values acc. EN303-3 at:
3zugskessel, V-07/06
- lamda=1.15, CO2=10%
GB
- T-air=20°C, rel. humidity=60%, p-baro=100kPa
1: LCV = 9.97 kWh/nm3
2: nm3 at 0°C, 1013 mbar
3: S max = 10 mg / nm3
4: with 15% internal exhaust gas recirculation, constant amount at partial load.
110
95
°C
m3/h
mbar
°C
kW
kW
kg/s
nm
3
/h
90
100
110
120
130
140
150
160
170
180
190
200
0 500 1000 1500 2000 2500
QN [kW]
[°C]
GB-ARF
LR21
LR22
LR23
LR24
LR25
LR26 LR27
LR28 LR29
LR30
LR31
LR32
Flue gas temperature diagram LR, low-NOx, natural gas and ARF with clean boiler
© Copyright YGNIS AG CH-Ruswil
19


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