Zanussi DI 720 Instructions For The Use And Care page 14

To fill the dispenser press the catch A
(fig. 6) to open the lid. Pour rinse aid into
the funnel. The container holds
approximately 150cc of rinse aid, which
will last for about 70 wash cycles.
To the left of the dispenser there is an
indicator which shows the level of liquid
in the dispenser B (fig. 6).
Adjusting the Quantity of Rinse Aid.
It may be necessary to adjust the quantity
of rinse aid dispensed if you live in either
a very hard or a very soft water district.
More is needed for hard and less for soft
water. Leave the dispenser in its preset
position when you first use the machine
and only adjust it if, after a few cycles you
notice any of the following:
A
Crockery remaining dull looking and/or
showing occasional round spots. If this is
so increase the quantity of rinse aid by
turning knob C (fig. 7) to the right.
B
Crockery feeling sticky or showing whitish
spots. If this is so decrease the quantity
of rinse aid, by turning knob C (fig. 7) to
the left.