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Wall Type Condensing Boilers

WT-S One Series
WT-S One Series
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WT-S One Series

WT-S ONE OH, OH+EX and BS Series Wall Type Condensing Boiler with Stainless Steel Heat Exchanger

  • OH Series: Heating only wall type condensing boiler
  • OH+EX Series: Heating only wall type condensing boiler + expansion tank support
  • BS Series: Boiler supported wall type condensing boiler
  • High efficiency with Premix condensation technology and micro-flame metal fiber coated steel burner,
  • 4 different thermal capacity options (35 kW, 45 kW, 55 kW, 65 kW) in WT-S ONE OH and BS Series boilers and 2 different thermal capacity options (35 kW, 45 kW) in WT-S ONE OH + EX Series boilers with stainless steel heat exchanger,
  • Low energy consumption with modulating primary circuit pump integrated to the boiler,
  • Energy saving through 5:1 modulating operation,
  • Illuminated LCD panel for ease of use,
  • Operation with natural gas and LPG,
  • Combi boiler operation at low noise levels with its body design allowing high heat and sound insulation,
  • Superior safety features:
    • Flame safety control; ionization,
    • Flue gas temperature control,
    • Heating circuit overheating safety,
    • Frost protection,
    • Low water pressure safety,
  • Optional room thermostat connection,
  • Eco-friendly heating systems with low NOx and CO emission rates,
TECHNICAL SPECIFICATIONS Unit WT-S
ONE 35
OH		 WT-S
ONE 45
OH 		 WT-S
ONE 55
OH		 WT-S
ONE 65
OH
Thermal Capacity
Maximum Heating Capacity kW 35 45 55 65
Minimum Heating Capacity kW 7 10 12 13
Maximum Heat Output (80°C / 60°C) kW 34,3 43,4 54,1 63,8
Minimum Heat Output (80°C / 60°C) kW 6,9 8,1 9,5 11
Maximum Heat Output (50°C / 30°C) kW 36,9 45,9 56,2 68,1
Minimum Heat Output (50°C / 30°C) kW 7,3 8,1 10,3 11,7
Thermal Efficiency
Efficiency @ Pmax. (80°C / 60°C) % 97,2 97,3 97,5 97,6
Efficiency @ Pmin. (80°C / 60°C) % 98,6 98,7 99,1 99,2
Efficiency @ Pmax. (50°C / 30°C) % 105,2 105,3 104,7 105,2
Efficiency @ Pmin. (50°C / 30°C) % 107,2 107,1 107,2 107,3
Efficiency @ %30 (30°C) % 108,6 108,4 108,7 108,3
Central Heating Circuit
Maximum Operating Temperature °C 85 85 85 85
Maximum Operating Pressure bar 3 3 3 3
Minimum Operating Pressure bar 0,8 0,8 0,8 0,8
Gas Specifications
Gas Type - G20-G31 G20-G31 G20-G31 G20-G31
Gas Inlet Pressure (G20) mbar 20 20 20 20
Gas Inlet Pressure (G31) mbar 37 37 37 37
Maximum gas consumption Nm³/h 3,65 4,69 5,73 6,78
Minimum gas consumption Nm³/h 0,73 1,04 1,25 1,36
Combustion Specifications
Maximum Flue Gas Temperature (50°C / 30°C) °C 40 42 43 45
Maximum Flue Gas Temperature (80°C / 60°C) °C 65 65 65 65
Electrical Specifications
Electrical Supply V / Hz 230/50 230/50 230/50 230/50
Protection Class IP X4D X4D X4D X4D
Energy Consumption W 110 110 125 125
Fuse Current A 2 2 2 2
Circuit Specifications
Gas Connection Diameter inch 3/4'' 3/4" 3/4" 3/4"
Central Heating Circuit Inlet/Outlet Diameter inch 3/4" 3/4" 1" 1"
General Specifications
Net Weight kg 44 47 54 61
Flue Diameter (Ø) mm 60/100 60/100 80/125 80/125
NOx Emission Class (EN 15502-1+A1) - 5 5 5 5
G20 Natural Gas , G31 LPG
TECHNICAL SPECIFICATIONS Unit WT-S
ONE 35
OH-EX		 WT-S
ONE 45
OH-EX
Thermal Capacity
Maximum Heating Capacity kW 35 45
Minimum Heating Capacity kW 6,5 11
Maximum Heat Output (80°C / 60°C) kW 34,2 45,5
Minimum Heat Output (80°C / 60°C) kW 7,1 8,2
Maximum Heat Output (50°C / 30°C) kW 36,7 43,2
Minimum Heat Output (50°C / 30°C) kW 7,2 7,9
Thermal Efficiency
Efficiency @ Pmax. (80°C / 60°C) % 97,1 97,6
Efficiency @ Pmin. (80°C / 60°C) % 98,7 98,7
Efficiency @ Pmax. (50°C / 30°C) % 105,2 105,3
Efficiency @ Pmin. (50°C / 30°C) % 107,2 107,1
Efficiency @ %30 (30°C) % 108,6 108,4
Central Heating Circuit
Maximum Operating Temperature °C 85 85
Maximum Operating Pressure bar 3 3
Minimum Operating Pressure bar 0,8 0,8
Gas Specifications
Gas Type - G20-G31 G20-G31
Gas Inlet Pressure (G20) mbar 20 20
Gas Inlet Pressure (G31) mbar 37 37
Maximum gas consumption Nm³/h 3,65 4,69
Minimum gas consumption Nm³/h 0,68 1,15
Combustion Specifications
Maximum Flue Gas Temperature (50°C / 30°C) °C 40 42
Maximum Flue Gas Temperature (80°C / 60°C) °C 65 65
Electrical Specifications
Electrical Supply V / Hz 230/50 230/50
Protection Class IP X4D X4D
Energy Consumption W 110 110
Fuse Current A 2 2
Circuit Specifications
Expansion Tank Volume L 12 12
Gas Connection Diameter inch 3/4" 3/4"
Central Heating Circuit Inlet / Outlet Diameter inch 3/4" 3/4"
General Specifications
Net Weight kg 50 65
Flue Diameter (Ø) mm 60/100 60/100
NOx Emission Class (EN 15502-1+A1) - 5 5
G20 Natural Gas , G31 LPG
TECHNICAL SPECIFICATIONS Unit WT-S
ONE 35
BS		 WT-S
ONE 45
BS 		 WT-S
ONE 55
BS		 WT-S
ONE 65
BS
Thermal Capacity
Maximum Heating Capacity kW 35 45 55 65
Minimum Heating Capacity kW 7 10,5 12 14
Maximum Heat Output (80°C / 60°C) kW 34,1 45,7 54,2 63,6
Minimum Heat Output (80°C / 60°C) kW 6,7 7,7 9,6 10,8
Maximum Heat Output (50°C / 30°C) kW 36,7 43,5 56,2 67,9
Minimum Heat Output (50°C / 30°C) kW 7,2 7,4 10,2 11,4
Thermal Efficiency
Efficiency @ Pmax. (80°C / 60°C) % 97,2 97,4 97,3 97,4
Efficiency @ Pmin. (80°C / 60°C) % 98,1 98,2 98,3 98,4
Efficiency @ Pmax. (50°C / 30°C) % 105,2 104,7 105,8 105,7
Efficiency @ Pmin. (50°C / 30°C) % 107,4 107,2 107,1 107,2
Efficiency @ %30 (30°C) % 108,5 108,6 108,9 108,7
Domestic Hot Water Circuit
Temperature adjustment range with external storage tank usage °C 10-65 10-65 10-65 10-65
Central Heating Circuit
Maximum Operating Temperature °C 85 85 85 85
Maximum Operating Pressure bar 3 3 3 3
Minimum Operating Pressure bar 0,8 0,8 0,8 0,8
Gas Specifications
Gas Type - G20-G31 G20-G31 G20-G31 G20-G31
Gas Inlet Pressure (G20) mbar 20 20 20 20
Gas Inlet Pressure (G31) mbar 37 37 37 37
Maximum gas consumption Nm³/h 3,65 4,69 5,73 6,78
Minimum gas consumption Nm³/h 0,73 1,09 1,25 1,46
Combustion Specifications
Maximum Flue Gas Temperature (50°C / 30°C) °C 40 42 43 45
Maximum Flue Gas Temperature (80°C / 60°C) °C 65 65 65 65
Electrical Specifications
Electrical Supply V / Hz 230/50 230/50 230/50 230/50
Protection Class IP X4D X4D X4D X4D
Energy Consumption W 110 110 125 125
Fuse Current A 2 2 2 2
Circuit Specifications
Gas Connection Diameter inch 3/4" 3/4" 3/4" 3/4"
Central Heating Circuit Inlet / Outlet Diameter inch 3/4" 3/4" 1"  1" 
General Specifications
Net Weight kg 45 48 55 63
Flue Diameter (Ø) mm 60/100 60/100 80/125 80/125
NOx Emission Class (EN 15502-1+A1) - 5 5 5 5
G20 Natural Gas , G31 LPG
 MODEL W
(mm)		 H
(mm)		 D
(mm)
WT-S ONE 35 OH 450 735 378
WT-S ONE 35 OH-EX 450 735 378
WT-S ONE 35 BS 450 735 378
WT-S ONE 45 OH 450 735 378
WT-S ONE 45 OH-EX 450 735 378
WT-S ONE 45 BS 450 735 378
WT-S ONE 55 OH 415 802 403
WT-S ONE 55 BS 415 802 403
WT-S ONE 65 OH 415 802 403
WT-S ONE 65 BS 415 802 403

  • Ecodense WT-S ONE 35-45 [BS] Devre Şeması
  • Ecodense WT-S ONE 55-65 [BS] Devre Şeması
  • Ecodense WT-S ONE 35-45 [OH] Devre Şeması
  • Ecodense WT-S ONE 55-65 [OH] Devre Şeması

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