Condensing Boilers

Floor Type Condensing Boilers

FT-SS Series

  •  High efficiency with Premix condensation technology and micro-flame metal fiber coated steel burner,
  •  High performance and long-lasting durability with expanded surface area and sheet thickness in the stainless steel heat exchanger,
  •  Heat exchanger protection with magnetic residue protection integrated in the boiler,
  •  Low back pressure thanks to the collector structure,
  •  9 different large capacity options as 250, 350, 450, 550, 650, 750, 850, 950, 1050 in single boiler,
  •  Wide thermal capacity option up to 16,800 kW, thanks to the cascade connection of 16 boilers in cascade systems,
  •  Energy saving through 5:1 modulating operation,
  •  Illuminated LCD panel for ease of use,
  •  Daily and weekly operation schedule can be programmed,
  •  Preparing summer and winter seasonal heat program,
  •  Option of use with Natural gas and LPG,
  •  Operation at lower noise values,
  •  Frost protection feature,
  •  Eco-friendly heating systems with low NOx and CO emission rates,
TECHNICAL SPECIFICATIONS Unit FT-SS
250
FT-SS
350
FT-SS
450
FT-SS
550
FT-SS
650
FT-SS
750
FT-SS
850
FT-SS
950
FT-SS
1050
Thermal Capacity
Maximum Heating Capacity kW 250 350 450 550 650 750 850 950 1050
Minimum Heating Capacity kW 56,3 75 89 114 110 125 135 146 150
Maximum Heat Output (80°C / 60°C) kW 243,1 341 440,6 534,7 632,8 730 827,5 924,8 1023
Minimum Heat Output (80°C / 60°C) kW 55 73,4 86,6 111,5 107,7 122 132,0 142,5 146,5
Maximum Heat Output (70°C / 50°C) kW 253,2 355 458 557 659 760 861 963 1065
Minimum Heat Output (70°C / 50°C) kW 57,7 77 91 117 113 128 139 150 154
Maximum Heat Output (50°C / 30°C) kW 263,2 369,2 475,0 578,8 685,7 790,1 895 1000,8 1106,5
Minimum Heat Output (50°C / 30°C) kW 60,4 80,6 95,6 122,5 118,5 134,7 145,2 157 161,4
Thermal Efficiency
Efficiency @ Pmax. (80°C / 60°C) % 97,2 97,3 97,9 97,2 97,4 97,3 97,4 97,3 97,4
Efficiency @ Pmin. (80°C / 60°C) % 97,7 97,8 97,3 97,8 97,9 97,6 97,8 97,6 97,7
Efficiency @ Pmax. (70°C / 50°C) % 101,3 101,4 101,7 101,2 101,4 101,3 101,3 101,3 101,4
Efficiency @ Pmin. (70°C / 50°C) % 102,5 102,6 102,4 102,6 102,8 102,7 102,7 102,6 102,6
Efficiency @ Pmax. (50°C / 30°C) % 105,3 105,5 105,6 105,2 105,5 105,3 105,3 105,3 105,4
Efficiency @ Pmin. (50°C / 30°C) % 107,3 107,5 107,4 107,5 107,7 107,8 107,6 107,5 107,6
Efficiency @ %30 (30°C) % 108,2 108,1 108,3 108,3 108,4 108,2 108,2 108,3 108,1
Domestic Hot Water Circuit 
Temperature adjustment range with external storage tank usage °C 10-65 10-65 10-65 10-65 10-65 10-65 10-65 10-65 10-65
Central Heating Circuit
Maximum Operating Temperature  °C 90 90 90 90 90 90 90 90 90
Water Volume L 25 32 40 47 54 62 69 76 84
Maximum Operating Pressure bar 6 6 6 6 6 6 6 6 6
Minimum Operating Pressure  bar 1 1 1 1 1 1 1 1 1
Water Resistance ΔT = 20 °C bar 250 260 260 280 270 280 300 290 310
Gas Specifications 
Gaz Type - G20-G31 G20-G31 G20-G31 G20-G31 G20-G31 G20-G31 G20-G31 G20-G31 G20-G31
Gas Inlet Pressure (G20) mbar 20 20 20 20 20 20 20 20 20
Gas Inlet Pressure (G31) mbar 37 37 37 37 37 37 37 37 37
Maximum Gas Consumption  Nm³/h 26,06 36,48 46,91 57,33 67,76 78,18 88,61 99,03 109,45
Minimum Gas Consumption  Nm³/h 5,87 7,82 9,28 11,88 11,47 13,03 14,07 15,22 15,64
Combustion Specifications
Maximum Flue Gas Temperature (50°C / 30°C) °C 52,4 52,6 54,7 55,2 55,3 55,7 56,2 57,5 57,1
Maximum Flue Gas Temperature (70°C / 50°C) °C 62,1 62,4 64,5 64,6 64,9 65,4 65,9 67,5 68,8
Maximum Flue Gas Temperature (80°C / 60°C) °C 69,4 72,1 74,6 74,2 74,5 75,1 75,6 78,2 79,5
NOx Emission Class (EN 15502-1+A1) - 6 6 6 6 6 6 6 6 6
Electrical Specifications
Electrical Supply V / Hz 230/50 230/50 230/50 230/50 230/50 230/50 230/50 230/50 230/50
Protection Class IP X4D X4D X4D X4D X4D X4D X4D X4D X4D
Energy Consumption W 260 280 350 400 520 600 670 750 840
Fuse Current A 6 6 6 6 6 6 6 6 6
Circuit Specifications
Gas Connection Diameter inch 1 1/2" 1 1/2" 2" 2" 2" 2" 2" 2" 2"
Central Heating Circuit Inlet/Outlet Diameter inch 2" 2" 2 1/2" 2 1/2" 2 1/2" 2 1/2" 2 1/2" 2 1/2" 2 1/2"
General Specifications
Net Weight  kg 200 222 255 291 351 455 525 612 667
Flue Diameter (Ø) mm 200 200 200 200 200 200 200 200 200
G 20 Natural Gas, G 31 LPG  
МОДЕЛЬ W
(mm)
H
(mm)
L
(mm)
C1
(mm)
C2
(mm)
C3
(mm)
C4
(mm)
C5
(mm)
C6
(mm)
C7
(mm)
FT-SS 250 890 1250 1450 430 275 675 165 480 110 500
FT-SS 350 890 1250 1610 430 275 675 165 640 110 500
FT-SS 450 890 1265 1770 430 275 675 165 800 110 500
FT-SS 550 890 1265 1925 430 275 675 165 955 110 500
FT-SS 650 890 1265 2085 430 275 675 165 1110 110 500
FT-SS 750 890 1265 2245 430 275 675 165 1270 110 500
FT-SS 850 890 1265 2400 430 275 675 165 1430 110 500
FT-SS 950 890 1265 2560 430 275 675 165 1585 110 500
FT-SS 1050 890 1265 2715 430 275 675 165 1745 110 500
  • FT-SS Flow Chart