The Riello BS 4 is an automatic monobloc forced-draught Low NOx gas burner with single-stage operation and a firing range of 110–249 kW.
Product Specification
- Forward-curved centrifugal fan and a sound-insulated cover.
- Air damper closes fully in standby; adjustment is accessible without removing the cover.
- Combustion head with a stainless-steel end cone, ignition electrodes, ionisation probe, gas distributor and flame-stabilising disc.
- Adjustable air-pressure switch with a graduated selector.
- Microprocessor burner safety control with diagnostics and remote reset.
- Flame inspection window.
- Radio-interference filter.
Electrical and Operating Data
- Power supply: 230 V, single-phase, 50 Hz.
- Electrical protection: IPX0D (IP40).
- Total electrical input: 0.53 kW.
- NOx emission class: Class 3 to EN 676.
Standard Equipment
- Gas-train connection flange, flange gasket and four fixing screws.
- Thermal screen and four boiler-flange fixing screws.
- Three electrical connection plugs.
- Installation, operation and maintenance manual; spare-parts catalogue.

