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34
Drain valve
Description
The drain valve is operated by using the pressure
Fig.
in the cold water intake. A tube (1) is connected
56
between the cold water intake and a solenoid
valve (2). When the solenoid valve is activated,
it opens and allows water to flow into the feeder
tube (3). The water presses up a piston (4),
which uses the pressure lid (5) to close the drain
valve rubber membrane. When the solenoid
valve cuts out, the water pressure push the
piston back, allowing the water to pass the
solenoid valve and drain out via the return tube
(7).
Trouble shooting
If the drain valve doesn't close:
• Check that the solenoid valve (2) receives
electricity.
• Check that the solenoid valve and the tubes
are clear by:
- removing the drain hose (3).
- Check that water exits the hose when the
valve is activated.
• Check that the diaphragm (9) is undamaged.
If the drain valve doesn't open:
• Check that the return tube (7) is open.
• Check that the piston (4) doesn't seize.
Mechanical and electrical design
56
3
7
2
1
6
5
4
8
1159
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