Wascomat EXSM 230 S, Руководство по эксплуатации и техническому обслуживанию

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Mechanical and electrical design
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1161
1185
Supply injection valve
Construction
The valve has a single-inlet with either one, two
or three outlets, each with its own solenoid coil.
The body is made of heat-resistant polyamid
plastic and the solenoids encased in water-tight
plastic. The electrical connector terminals are
spade lugs.
A filter screen on the inlet side prevents dirt from
entering the valve. Flow restrictors can be placed
at either the inlet or any of the outlets.
Operation
When the solenoid is energized, the spring-
loaded plunger is drawn up and the pilot valve in
the centre of the diaphragm open. Because of the
difference in diameter between the pilot valve
opening and the ventilating hole in the
diaphragm, the pressure above the diaphragm
drops to a point where the admission pressure
below the diaphragm can lift the diaphragm, thus
opening the valve.
When the current to the solenoid is cut off, the
plunger spring will press the plunger against the
pilot opening of the diaphragm. The pressure
above the diaphragm then rises to correspond to
the water inlet pressure and the pressure of the
spring will close the valve.
Fig.
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Fig.
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solenoid
pilot valve
diaphragm
ventilating hole
plunger