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Condensing Boilers

Wall Type Condensing Boilers

WT-SS Series WT-SS Series
WT-SS Series
WT-SS Series
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WT-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,
  • Enhanced combustion efficiency with flash back flap,
  • Low energy consumption with the modulating primary circuit pump integrated to the boiler with capacities 45-50-55-60-65 kW,
  • 12 different large capacity options as 45, 50, 55, 60, 65, 80, 90, 100, 110, 115, 125, 150 in single boiler
  • Wide thermal capacity option up to 2,400 kW, thanks to the cascade connection of 16 boilers in cascade systems
  • Maximum air and water tightness with hermetic case,
  • 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 WT-SS
45		 WT-SS
50		 WT-SS
55		 WT-SS
60		 WT-SS
65		 WT-SS
80		 WT-SS
90		 WT-SS
100		 WT-SS
110		 WT-SS
115		 WT-SS
125		 WT-SS
150
Thermal Capacity
Maximum Heating Capacity kW 45 50 55 60 65 80 90 100 110 115 125 143
Minimum Heating Capacity kW 9,72 10,8 11,8 12,9 14 14,15 14,18 14,27 19,9 19,9 20 20
Maximum Heat Output (80°C / 60°C) kW 43,7 48,6 53,3 58,2 63.2 77,8 87,5 97,2 106,9 111,7 121,4 138,5
Minimum Heat Output (80°C / 60°C) kW 9,5 10,5 11,5 12,6 13,7 13,8 13,8 13,9 19,4 19,4 19,5 19,5
Maximum Heat Output (70°C / 50°C) kW 45,6 50,7 55,5 60,7 65,9 81,1 91,3 101,4 111,5 116,4 126,5 144,5
Minimum Heat Output (70°C / 50°C) kW 10,0 11,1 12,1 13,3 14,4 14,6 14,6 14,7 20,4 20,4 20,5 20,5
Maximum Heat Output (50°C / 30°C) kW 47,6 52,8 57,8 63,2 68,6 84,4 95 105,5 116,1 121 131,5 150,4
Minimum Heat Output (50°C / 30°C) kW 10,4 11,6 12,7 13,9 15,1 15,3 15,3 15,4 21,3 21,3 21,5 21,5
Thermal Efficiency
Efficiency @ Pmax. (80°C / 60°C) % 97,1 97,2 96,9 97,1 97,2 97,3 97,2 97,2 97,2 97,1 97,1 97
Efficiency @ Pmin. (80°C / 60°C) % 97,6 97,6 97,9 97,9 97,9 97,5 97,3 97,4 97,5 97,5 97,5 97,5
Efficiency @ Pmax. (70°C / 50°C) % 101,4 101,4 101,0 101,2 101,4 101,4 101,4 101,4 101,4 101,2 101,2 101,0
Efficiency @ Pmin. (70°C / 50°C) % 102,6 102,6 102,9 102,9 102,9 102,8 102,6 102,7 102,3 102,3 102,5 102,5
Efficiency @ Pmax. (50°C / 30°C) % 105,8 105,5 105,1 105,4 105,5 105,5 105,6 105,5 105,5 105,2 105,2 105,2
Efficiency @ Pmin. (50°C / 30°C) % 107,2 107,5 107,9 107,9 107,9 108,1 107,9 107,9 107 107 107,5 107,5
Efficiency @ %30 (30°C) % 108,1 108,2 108,3 108,3 108,4 108,2 108,2 108,3 108,1 108,1 108,3 108,4
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 10-65 10-65 10-65
Central Heating Circuit
Maximum Operating Temperature  °C 90 90 90 90 90 90 90 90 90 90 90 90
Water Volume L 5 5 5 5 5 6 6 7 7 8 8 9
Maximum Operating Pressure bar 6 6 6 6 6 6 6 6 6 6 6 6
Minimum Operating Pressure  bar 1 1 1 1 1 1 1 1 1 1 1 1
Water Resistance ΔT = 20 °C bar 260 270 290 300 310 360 370 390 340 360 380 410
Gas Specifications 
Gaz Type - G20-G31 G20-G31 G20-G31 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 20 20 20
Gas Inlet Pressure (G31) mbar 37 37 37 37 37 37 37 37 37 37 37 37
Maximum Gas Consumption  Nm³/h 4,69 5,21 5,73 6,25 6,78 8,34 9,38 10,42 11,47 12 13,03 14,91
Minimum Gas Consumption  Nm³/h 1,01 1,13 1,23 1,34 1,46 1,48 1,48 1,49 2,07 2,07 2,08 2,08
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 56,2 57,2 57,5
Maximum Flue Gas Temperature (70°C / 50°C) °C 63,7 65,6 68,0 67,9 68,1 68,6 69,1 71,3 72,7 72, 68,9 69,8
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 80,5 81,2 80,6 82
NOx Emission Class (EN 15502-1+A1) - 6 6 6 6 6 6 6 6 6 6 6 6
Electrical Specifications
Electrical Supply V / Hz 230/50 230/50 230/50 230/50 230/50 230/50 230/50 230/50 230/50 230/50 230/50 230/50
Protection Class IP X4D X4D X4D X4D X4D X4D X4D X4D X4D X4D X4D X4D
Energy Consumption W 62 65 70 80 90 110 120 130 140 170 220 260
Fuse Current A 6 6 6 6 6 6 6 6 6 6 6 6
Circuit Specifications
Gas Connection Diameter inch 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4
Central Heating Circuit Inlet/Outlet Diameter inch 3/4 3/4 1 1 1 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2
General Specifications
Net Weight  kg 60 60 65 65 65 75 75 75 80 80 80 80
Flue Diameter (Ø) mm 60/100 60/100 80/125 80/125 80/125 100/150 100/150 100/150 100/150 100/150 100/150 100/150
G 20 Natural Gas, G 31 LPG  

 MODEL W
(mm)		 H
(mm)		 D
(mm)		 C1
(mm)		 C2
(mm)		 C3
(mm)		 C4
(mm)		 C5
(mm)		 C6
(mm)		 C7
(mm)		 C8
(mm)
WT-SS 45 450 756 380 123 342 175 205 127 63 170 107
WT-SS 50 450 756 380 123 342 175 225 127 85 170 107
WT-SS 55 465 820 465 54 354 260 224 68 68 232 118
WT-SS 60 465 820 465 54 354 260 229 68 68 232 118
WT-SS 65 465 820 465 54 354 37 301 68 68 232 118
WT-SS 80 546 670 640 90 470 500 74 450 523 104 139
WT-SS 90 546 670 640 90 470 500 74 450 523 104 139
WT-SS 100 546 670 640 90 470 500 74 450 523 104 139
WT-SS 110 546 750 640 90 470 500 74 450 523 104 139
WT-SS 115 546 750 640 90 470 500 74 450 523 104 139
WT-SS 125 546 750 640 90 470 500 74 450 523 104 139
WT-SS 150 546 750 640 90 470 500 74 450 523 104 139
  • WT-SS Flow Chart

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