23MODELSLEGENDERA S PKa1 = System delivery R 1” R3/4a2 = System return R 1” R3/4a3 = Gas connection R3/4”a4 = System load R 1/2”a7 = Fumes outlet Ø 80 mma8 = Air inlet Ø 80 mm600850705600 115190345EFa1a4a2a3D120a7a8ERA 31 S PKERA 31 S31,531,5600600280270395-45553027.10027.100Model kW L D E FKcal/hDimensionsOutput