Wolf FGB-28 - Specification

3064458_201811
9
Type FGB-28 FGB-35 FGB-K-28 FGB-K-35
Rated heating output at 80/60 °C kW 24.4/27.3
1)
31.1/34
1)
24.4/27.3
1)
31.1/34
1)
Rated heating output at 50/30 °C kW 27.3 34.9 27.3 34.9
Rated heat input kW 25/28
1)
32/35
1)
25/28
1)
32/35
1)
Lowest heating output (modul.) at 80/60 °C kW 4.8 6.7 4.8 6.7
Lowest heating output (modul.) at 50/30 °C kW 5.3 7.5 5.3 7.5
Lowest heat input (modul.) kW 4.9 6.9 4.9 6.9
Heating ow connection G 3/4"(DN 20) 3/4"(DN 20)
Heating return connection G 3/4"(DN 20) 3/4"(DN 20)
DHW connection / DHW circulation G 1/2“ 1/2“
Cold water connection G 1/2“ 1/2“
Gas connection R 1/2“ 1/2“
Balanced ue connection mm 60/100 60/100
Dimensions Depth mm 310 310
Width mm 408 408
Height mm 720 (incl. device connection ange)
Balanced ue system Type B23P, B33P, C13(x), C33(x), C43(x), C53(x),
C63(x), C83(x), C93(x)
Gas category see table an page 44
Gas supply details
Natural gas E/H (Hi [net cv]=9.5 kWh/m³=34.2 MJ/m³) m³/h 2.63/2.94 3.36/3.68 2.63/2.94 3.36/3.68
Natural gas LL (Hi [net cv]=8.6 kWh/m³=31.0 MJ/m³) m³/h 2.90/3.25 3.72/4.06 2.90/3.25 3.72/4.06
LPG (Hi [net cv]=12.8 kWh/m³=46.1 MJ/m³) kg/h 1.95/2.18 2.5/2.73 1.95/2.18 2.5/2.73
Natural gas supply pressure (permissible min./max.) mbar see table on page 44 see table on page 44
LPG supply pressure (permissible min./max.) mbar see table on page 44 see table on page 44
Efciency at rated load at 80/60 °C (Hi[net cv]/Hs[gross cv]) % 98/88 98/88 98/88 98/88
Efciency at 30 % partial load and TR=30 °C (Hi[net cv]/Hs[gross cv]) % 109/98 109/98 109/98 109/98
Flow temperature. factory setting °C 75 75
Flow temperature up to approx. °C 85 85
Max. overall positive pressure. heating circuit bar 2.5 2.5
Max. residual head for heating circuit: High efciency pump (EEI<0.20)
1075 l/h pump rate (25 kW at dt=20 K) mbar 450 450 450 450
1376 l/h pump rate (32 kW at dt=20 K) mbar - 350 - 350
Max. permiss. overall positive pressure bar 10 10
DHW throughput l/min 2.0-14.4 2.0-14.4
Minimum ow pressure 15502-2-2 bar 0.2 0.3
DHW temperature range (adjustable) °C 30-65 30-65
Spec. water throughput "D" at ΔT = 30 K l/min 13.4 16.3
Expansion vessel. total capacity l 8 8 8 8
Expansion vessel. pre-charge pressure bar 0.75-0.95 0.75-0.95 0.75-0.95 0.75-0.95
Flue gas temperature 80/60-50/30 at Qmax °C 85-65 70-50 85-65 70-50
Flue gas temperature 80/60-50/30 at Qmin °C 50-40 50-40 50-40 50-40
Flue gas mass ow rate at Qmax g/s 11.2/12.50 14.26/15.50 11.2/12.50 14.26/15.50
Flue gas mass ow rate at Qmin g/s 2.33 3.25 2.33 3.25
Available gas fan draught at Qmax Pa 150 160 150 160
Available gas fan draught at Qmin Pa 8 12 8 12
Flue gas category G52 G52
NOx class 6 6
Amount of condensate at 50/30 °C l/h ca. 1.0 ca. 1.7 ca. 1.0 ca. 1.7
pH value of condensate ca. 4.3 ca. 4.3 ca. 4.3 ca. 4.3
Power consumption in standby W 2 2 2 2
Power consumption W max. 102 max. 114 max. 102 max. 114
IP rating IP IPX4D IPX4D IPX4D IPX4D
Power supply/fuse/MCB protection 230V / 50Hz / 3.15A 230V / 50Hz / 3.15A
Total weight (wall mounted gas condensing boiler) kg 27 28 27 28
CE ID number CE-0085CQ0261 CE-0085CQ0261
1) Heating mode / DHW mode
4. Specication