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Gas condensing boiler
MGK-2_390-630

Floorstanding gas condensing boiler for condensing operation and DHW heating for natural gas E, LL
Model / Performance
  • MGK-2-390
  • MGK-2-470
  • MGK-2-550
  • MGK-2-630
  • Key Facts
  • Specification
  • Downloads
  • Modulation range 17 - 100 %
  • Standard seasonal efficiency [to DIN] net cv up to 110 %
  • No minimum volume of circulation water
  • Option to integrate neutralising system set with booster and condensate removal pump
  • Extremely quiet operation
  • Can be split for transportation – largest module 1460 x 1295 x 790 mm
  • ISM7i LAN/WLAN module allows communication via smartphone, laptop or PC
  • 0-10 V input for BMS system
  • 230 V fault message output
  • Common sensor connection option for low loss header
  • Integral back draught safety device for flue cascade operation
  • Possibility of cascade operation with up to 5 appliances
  • Fully encased and thermally insulated
  • Compact design, fits through an 800 mm door
Please choose model
Gas condensing boiler MGK-2_390-630
Type MGK-2 390 470 550 630

General data

Rated heating output at 80/60 °C kW 366.7 434.7 511.6 584.4
Rated heating output at 50/30 °C kW 392 467.1 549.2 626.6
Rated heat input kW 371.2 443.6 521 593.9
Lowest heating output (modulating) at 80/60 °C kW 58.5 70.7 84.5 96.7
Lowest heating output (modulating) at 50/30 °C kW 64.2 78.7 94 106.8
Lowest heat input (modulating) kW 59.5 73.2 86.8 98.5
Heat input modulation range % 17-100 17-100 17-100 17-100
Amount of condensate at 40/30 °C l/h 39 46 52 59
Condensate pH value approx. 4,0 approx. 4,0 approx. 4,0 approx. 4,0
Water capacity of the heating water heat exchanger l 50 56 62 68
Max. permissible boiler pressure bar 6 6 6 6
Max. permissible flow temperature °C 90 90 90 90
Available gas fan draught Pa 150 150 150 150
Standby losses excess temperature 30 / 50 K % 0,11 / 0,18 0,10 / 0,17 0,09 / 0,15 0,09 / 0,14
Flue gas temperature 80/60-50/30 at Qmax °C 65-35 65-35 65-35 65-35
Flue gas temperature 80/60-50/30 at Qmin °C 60-30 60-30 60-30 60-30
Max. flue gas mass flow rate g/s 156.3 185.2 225.3 247.4
Flue gas category to DVGW G 635 G 52 G 52 G 52 G 52
Heating water pressure drop with 20 K spread mbar 120 113 126 118
IP rating IP20 IP20 IP20 IP20
Sound power to EN 15036 Part 1, room sealed dB(A) 61 66 68 68
Sound pressure level 1 m in front of MGK-2, room sealed 2) dB(A) 44 49 50 50
Sound power to EN 15036 Part 1, open flue dB(A) 78 82 84 84
Sound pressure level 1 m in front of MGK-2, open flue 2) dB(A) 60 64 65 65

Efficiency

η 80/60 at Qmax % 98.8 98 98.2 98.4
η 50/30 at Qmax % 105.6 105.3 105.4 105.5
η TR30 at 30% % 107.8 108.9 108.6 107.6

Standard seasonal efficiency [to DIN]

at 40 / 30°C % 109.9 110.1 110.3 110.4
at 75 / 60°C % 106.4 106.4 106.3 106.3
Total height A mm 1460 1460 1460 1460
Total width / width excl. gas/air connection B mm 1860/1295
Total depth / depth excl. casing C mm 850 / 790 850 / 790 850 / 790 850 / 790
Flue diameter mm 250 250 250 250
Combustion air supply mm 200 200 200 200
Heating flow DN 80 PN6 80 PN6 80 PN6 80 PN6
Heating return DN 80 PN6 80 PN6 80 PN6 80 PN6
Gas connection R 2“ 2“ 2“ 2“
Air/flue gas routing Type B23, B23P, C33, C43, C53, C63, C83, C93

Gas supply details:

Natural gas E/H (net cv = 9.5 kWh/m³ = 34.2 MJ/m³) 39.1 46.7 54.8 62.5
Natural gas LL (net cv = 8.6 kWh/m³ = 31.0 MJ/m³) 43.2 51.6 60.6 69.0
Gas supply pressure: natural gas E/H/LL mbar 20 20 20 20

Weight

Total weight (empty) kg 390 420 450 480

Electrics

Electrical connection for fuse protection V~/Hz 1~ NPE / 230VAC / 50Hz / 10A/B alternativ: 3~ NPE / 400VAC / 50Hz / 10A/B


Output heating circuit pump/ZHP fuse V~/Hz 1~ NPE / 230VAC / 50Hz / 4A alternativ: 3~ NPE / 400VAC / 50Hz / 4A


Power consumption (partial load/full load) W 42 - 410 45 - 490 48 - 580 50 - 660
Standby power consumption W 8 8 8 8