Hot water boiler WTC-GB series

gasnatural gascondensing

Overview
Although compact, the gas condensing boiler Weishaupt Thermo Condens® WTC-GB delivers up to 620 kW and can reliably heat large residential or commercial buildings. The high-performance heat exchanger is made of aluminium-silicon, providing significantly higher thermal conductivity and strong corrosion resistance.

Key benefits

• High-performance aluminium-silicon heat exchanger (thermal conductivity up to 7 times stainless steel) for excellent efficiency and enhanced corrosion resistance.
• Modulating operation: continuous power adjustment (modulation ratio 1:10 for the 620 version, 1:8 for the 470 version) to reduce short-cycling and improve efficiency.
• PLN burner with Premix and surface combustion technology for low emissions and continuous operation from 60 kW.
• Synchronous modulation burner motor reducing electrical consumption, efficiency class IE5.
• Cascade installation possible (up to 2,480 kW) for higher demands; cascade managed via the WEM energy management system.
• Standard dual combustion-air filtration, with easy-to-clean filter material.
• Easy maintenance thanks to wide lateral inspection hatches enabling cleaning of the heat exchanger.
• Standard control capable of managing up to 4 circuits; extension modules available and remote monitoring/optimization via the WEM portal.

Installation and practical aspects

• Compact dimensions: depth approx. 1.6 m, height about 1.53 m and width only 680 mm; fits through standard doors.
• Indicated weight (burner included): approx. 450 kg for the 620 version, ~370 kg for the 470 version.
• Extensive Weishaupt accessory program (flue systems, hydraulic components, safety devices) and insulating shells for hydraulic components to facilitate insulation and installation.

Features / technical specifications

• Product designation: Weishaupt Thermo Condens® WTC-GB (series 470-A, 620-A).
• Fuels: Natural gas (E/H, LL) and liquefied gases (B/P) depending on version.
• Boiler power min (at 50/30 °C): 59.0 kW (WTC-GB 470), 62.0 kW (WTC-GB 620).
• Boiler power max (at 50/30 °C): 471.0 kW (WTC-GB 470), 620.0 kW (WTC-GB 620).
• Modulation ratio: 1:8 (470) / 1:10 (620).
• Max flue gas temperature at 80/60 °C: 68 °C.
• Sound pressure: 64 dB.
• Maximum operating pressure: 6.0 bar.
• Width: 680.0 mm.
• Height: 1,531.0 mm.
• Depth: 1,592.0 mm (note: page indicates depth of about 1.6 m).
• Weight: 370,000 kg (WTC-GB 470), 430,000 kg (WTC-GB 620); weight including burner (620: ~450 kg indicated elsewhere on the page).
• Heat exchanger material: aluminium-silicon (low hydraulic pressure drop, optimized flow distribution).
• Burner: PLN, Premix and surface combustion technology (low emissions).
• Burner motor: synchronous modulation motor, efficiency class IE5.
• Cascade: possibility to install boilers in cascade up to 2,480 kW; control possible via WEM.
• Control: standard control up to 4 circuits; extension modules available; monitoring and optimization via WEM portal.