The Riello 40 GS 20/M is an automatic monobloc forced-draught gas burner with progressive two-stage or modulating operation and a firing range of 43/82–194 kW.
The standard burner operates progressively between low and high fire. An optional output regulator and temperature or pressure probe enable continuous modulation at intermediate firing rates, with a modulation ratio of 1:4.
Product Specification
- Servomotor-driven air damper with low-fire, high-fire and fully closed standby positions.
- Air/fuel ratio control gas train with combustion-head and combustion-chamber pressure impulse connections.
- Forward-curved centrifugal fan and a metal cover.
- Two pressure switches supervise the combustion-air and flue operating conditions.
- Combustion head with a stainless-steel end cone, ignition electrodes, ionisation probe, gas distributor and flame-stabilising disc.
- Combustion-head device for a compact flame shape.
- Remote reset and a radio-interference filter.
Electrical and Operating Data
- Power supply: 230 V, single-phase, 50 Hz.
- Fan motor: 0.15 kW.
- Total electrical input: 0.25 kW.
- Electrical protection: IPX0D (IP40).
- Burner control: LANDIS LMG 22.
- Duty: intermittent, with at least one shutdown every 24 hours.
Standard Equipment
- Reversible service hinge for left- or right-side maintenance access.
- Flange insulation screen, boiler fixing screws and nuts.
- 7-pin plug with EMC capacitor and 4-pin high/low thermostat plug.
- Installation, operation and maintenance manual; spare-parts catalogue.
Gas train: supplied separately.

