Available with “V” inverter execution TECHNICAL AND FUNCTIONAL CHARACTERISTICS • Low NOx and CO emissions gas burner compliant with European standard EN676 “Classe III”. • Two-stage operation (high/low flame). • High ventilation efficiency, low electrical input, low noise. • Air-gas mixing at blast-pipe. • Exhaust gas recycling blast-pipe able to achieve very low pollutant emissions, particularly with regard to nitrous oxides (NOx). • Maintenance facilitated by the fact that the mixing unit can be removed without having to remove the burner from the boiler. • Regulation of air flow rate for first and second stage with damper closure on standby to prevent in-flue heat dispersion. • Gas regulation by means of a two-stage working valve that is electromagnetically driven. • Possibility to chose gas train with valve tightness control. • Equipped with one 4 and 7-pole connector, one flange and one insulating seal for boiler fastening. • Gas train exit from the bottom (PV version). CONSTRUCTION CHARACTERISTICS Conform to: Gas Directive 90/396/CEE E.M.C. Directive 89/336/CEE L.V. Directive 73/23/CEE Reference standard: EN676 The burner consists of: • Air intake with butterfly gate for the regulation of the air combusting flow rate, with sound insulation and designed for optimal air damper opening linearity. • Combustion air input • Sliding boiler coupling flange to adapt the head protrusion to the various types of boilers. • Flame viewer. • Air pressure switch to ensure the presence of combustion air. • Air flow regulation for first and second stage by means of electric servomotor. • Flame detection by ionisation electrode. • Synoptic control panel with led of operation and block and burner off, operation and block indicator. • Automatic control and command Electrical supply equipment for the burner, compliant with European standard EN298. • Printed circuit electrical connections. • Intelligent connectors for burner/train (error proof). • 7 poles plug for the auxiliary feeding and for the thermostatic connection, 4 poles plug to control the second stage operation. • Prepared for microamperometer connection with ionisation cable. • Electrical protection rating IP44. To be ordered separately: • Gas train including safety and 1°/2° stage working valve that is electromagnetically driven, minimum pressure gauge, pressure adjuster and gas filter. Gas burner accessories mbar 10 Boiler coupling kit - 4 and 7 pin plug 4) Equipped with air closure device. 12) Valve tightness control not required by EN676. CTV) Gas train with Valve Tightness Control. **) Maximum gas inlet pressure at pressure regulator in CE version, at gas train for EXP version. Net calorific value of natural gas: Hi = 35,80 MJ/m3 = 8550 kcal/m3, at reference conditions of 0°C, 1013 mbar.

Burner/gas train match CE gas train version complies with EN676, EXP gas train version is for extra-European markets Gas type Curve on Execution P.Max** graph mbar Burner model P.Min* mbar Regulator with incorporated filter Part no. Included Included Included Included Included Included Included Included Included Included Included Included Included Included Included Included Included Included Valve tightness control kit Part no. Regulator with incorporated filter Part no. Valve tightness control kit Part no. Burner/gas train adapter Part no. Included Included Included Included Burner/gas train...