Project Description

Product benefits:

  • Digital control panel with back-lighted LCD display
  • Wide modulation ratio up to 1÷7: better efficiency thanks to reduced switch-on/switch-off of the boiler
  • Gas Adaptive Control (GAC) system: combustion automatic control to maintain constantly the highest level of efficiency
  • Modulating circulating pump
  • High DHW performances: up to 500 lt in 30 minutes (∆T 30°C)
  • Stainless steel 45 lt cylinder
  • Frontal access for advanced diagnostics
  • DHW expansion vessel supplied with the boyler Nuvola Duo-tec 33 GA VES



Hydraulic system

3 way electric diverter valve
Stainless steel premixing burner
Stainless steel heat exchanger
Stainless steel tank
Modulating fan with electronic speed adjusting system
Automatic by-pass
Modulating low energy pump of the heating circuit with built-in air vent
System to prevent pump and diverter valve sticking operating every 24 hours
Central relief valve set at 3 bar
Tank relief valve set at 8 bar
Sanitary 2 litres expansion vessel available as optional
Sanitary recirculation option

Thermoregulation system

Built-in climatic regulation (outdoor sensor available as optional)
Control of multi-zones system option

Control system

Overheat limit thermostat of the water/flue exchanger
Hydraulic pressure switch to prevent boiler operating in event of low water
Overheat limit thermostat against flues overheat
Electronic temperatures control by NTC sensors
Anti legionella function
Full anti-frost device
Electronic thermometer
Digital heating circuit pressure gauge