24TECHNICAL DATA TABLEBOILER MODELS ERA 31 S - ERA 31 S PKInput kcal/h 29.950kW 34.8Output* kcal/h 27.100kW 31.5Feeding Methane G20 mbar 20pressure GPL G30/G31 mbar 30/37Burner Methane G20 mbar 10.0pressure GPL G30/G31 mbar 11.0/15.0Burner Methane G20 ø mm 4 x 2.60jets GPL G30/G31 ø mm 4 x 1.85/4 x 1.85Gas delivery Methane G20 m3 /h 3.69(15°C; 1013 mbar) GPL G30/G31 kg/h 2.75/2.70Gas connection 3/4”Primary water content liters 17Ø Delivery / Return 1”Ø Delivery / Return (PK version) 3/4”Max. hydraulic pressure bar 3Primary expansion tank (PK version) liters 10Primary safety valve (PK version) bar 31/2” gasØ fume/air pipe connectionseparate mm 80concentric mm 100/60Power supply 230 V - 50 Hz 70 W (160 W versioni PK)Fume max. delivery g/s 16Fume temperature °C 165Weightversion without accessories kg 170version PK kg 175