135 of 204MAINTENANCE AND USE MANUALvap 6 - vap 6A - AD 8ENA valve knob (30) is installed on the AD 8 water softener: this can be adjusted to four differentpositions:2827Figure 1POSITION 1Fig. 1: Used during routineoperation.283127Na ClFigure 2POSITION 2Fig. 2: Used during steamrelease and salt (1 kg)loading for softenerregeneration.2827Figure 3POSITION 3Fig. 3: Used duringregeneration.28Figure 4POSITION 4Fig. 4: Used duringbackflow.3.4DESCRIPTION OF THE AD 8 VALVE DIAL POSITIONS1234