Kärcher HD 1090, Руководство по обслуживанию

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10
1 pressure chamber in front of injector
2 injector
3 ball
4 detergent connection
5 spring
6 high-pressure outlet
Unit function
Detergent injector with non-return valve
Detergent can only be taken in if the changeover
nozzle on the spray lance is set at "CHEM“.
The pressure in the system thereby drops to
approx. 50 bar and the injector generates its
maximum low pressure (approx. 0.8 bar).
The ball (3) of the detergent non-return valve is
lifted out of its seat and detergent is taken in.
With high-pressure operation, the ball of the
non-return valve seals off the detergent connec-
tion, thus preventing any water from flowing into
the detergent tank. With high-pressure operati-
on, no detergent can be taken in.