8.6 Solenoid valve 8.6.1 General characteristics The solenoid valve ducts water through the detergent dispenser, and is controlled electrically by the pressure switch. 1. Water intake 2. Solenoid valve body 3. Filter 4. Flow reducer 5. Coil 6. Spring 7. Moving core 8. Rubber seal 10. Membrane 11. Water outlet When at rest, the core, upon which pressure is exerted by a spring, holds the hole in the centre of the membrane closed; as a result, the membrane hermetically closes off access to the water intake duct. When the coil is powered, it attracts the core, which therefore opens the small hole in the centre of the membrane, and the valve opens. Various types of solenoid valve may be fitted:
solenoid valves with one inlet and one outlet solenoid valves with one inlet and two or three outlets. In this case, each section of the solenoid valve is controlled by a coil. ѓ Cold water solenoid valve The cold water solenoid valve is fitted to all models, and has a nominal delivery of about 6.5 - 9.5 litres per minute. The water pressure must be between 3 and 100 N/cm 2. ѓ Hot water solenoid valve The hot water solenoid valve is added to the cold water valve on models designed for hot water fill. Its nominal delivery is about 5 - 6 litres per minute. ѓ Condensation solenoid valve This solenoid valve, with one inlet and two or three outlets, is used in washer-dryers.
One section is used for the introduction of cold water; the other, whose delivery is about 0.4 litres per minute, is used for condensation of the steam during the drying phase. SOI/DT 2002-05 eb 67 599 35 23-17