... controls6 2-1 6 2-5 6 2-9 6 2-4 76 2-4 86 2-4 96 2-5 36 2-5 56 2-5 66 2-6 16 2-6 26 2-6 46 2-6 56 2-6 662HEATINGGeneralOperating principleDistribution unitFan unitRadiatorResistance unitControl panelControl cables616 1-1 6 1-4 6 1-7 6 1-9 6 1-1 06 1-1 16 1-1 26 1-1 3 9193 6-2 RHEATINGGeneral61AIR ... system.R19 Phase I R19 Phase II6 1-4 9203 3-3 R19 2196 -1 R95717R3HEATINGOperating principle61AIR DISTRIBUTION KNOB (B)Controls the air distribution flaps (4).R19 Phase I R19 Phase II6 1-5 9203 3-1 R1HEATINGOperating ... unitRadiatorResistance unitControl panelControl cables616 1-1 6 1-4 6 1-7 6 1-9 6 1-1 06 1-1 16 1-1 26 1-1 3 9193 6-2 RHEATINGGeneral61AIR DISTRIBUTION AND CIRCULATIONR19Phase IA External air intakeB Air distributionC Air outlet...