Hot water boiler WTC-GB series

natural gascondensing

Presentation
The different boiler models from 210 to 300 kW are suited to medium- and large-capacity installations. They are designed to convert almost all the fuel energy into useful heat. Boilers are characterised by silent operation, exemplary safety systems and long service life.

Efficiency
With a standardized efficiency of 110.3% on PCI (resp. 99.4% on PCS), physical limits are reached. Flue gas condensation recovers the heat contained in the water vapour produced by combustion, enabling efficiencies above 100% (on PCI/LHV).

Product benefits

• Wide power range: 210 to 300 kW; cascade capability up to 4 boilers for a total output of 1 200 kW.
• Quiet operation: effective noise reduction thanks to an intake silencer (210 kW).
• Exemplary safety: electronic monitoring via flue, supply and return sensors; integrated low-water protection.
• Quality design: materials and components selected for long service life.

Installation and use

• Base version prepared for optional interfaces to integrate into central management systems.
• Operational comfort: option for remote control WCM-FS; clear-text menus and illuminated 4-line display.
• Wide accessory range: domestic hot water preparation, flue gas exhaust systems, hydraulic accessories, control equipment and solar sensors for heating and DHW support.

Technical solutions (hardware aspects)

• Cascade capability up to 4 WTC-GB 300 boilers to reach 1 200 kW.
• Isolating heat exchanger available for single boilers and cascades (system separation).
• Flue- and air-side pressure switches integrated as standard.

Table - Characteristics by model
Model | Burner power min Qc | Burner power max Qc | Fuels | Efficiency Eta100 (PCI) | Efficiency Eta30 (PCI) | Heating efficiency class | Width | Depth | Height | Weight
WTC-GB-210-A | 44.0 kW | 200.0 kW | Natural gas E/H, Natural gas LL | 98.4% | 108.8% | A | 680.0 mm | 1205.0 mm | | 212.000 kg
WTC-GB-250-A | 48.0 kW | 239.0 kW | Natural gas E/H, Natural gas LL | 98.4% | 108.8% | A | 680.0 mm | 1205.0 mm | | 225.000 kg
WTC-GB-300-A | 53.0 kW | 276.0 kW | Natural gas E/H, Natural gas LL | 98.4% | 108.8% | A | 680.0 mm | 1205.0 mm | | 242.000 kg

Technical characteristics / specifications

• Available power range: 210 to 300 kW (models WTC-GB-210-A, -250-A, -300-A).
• High efficiency: standardized up to 110.3% (on PCI/LHV).
• Fuel: Natural gas (E/H) and Natural gas LL.
• Cascade capability: up to 4 boilers to reach 1 200 kW.
• Safety: electronic monitoring via flue, supply and return sensors; low-water protection.
• Operational comfort: remote control option (WCM-FS), clear menus, 4-line display.
• Installation: optional interfaces for integration into building management systems.
• Accessories: solutions for DHW preparation, flue gas evacuation, hydraulic accessories, controls and solar sensors.
• Main dimensions (example WTC-GB-210-A): width 680.0 mm, depth 1205.0 mm.
• Weight by model (as listed): 212.000 kg / 225.000 kg / 242.000 kg depending on model.