Operating instructions

Drain valve

Description

The drain valve is operated by using the pressure

in the cold water intake. A tube (1) is connected

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 and the springs (7) on the lid push

the piston back, allowing the water to pass the

solenoid valve and drain out via the return tube

(8).

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 (8) is open.

• Check that the piston (4) doesn’t seize.

Fig.

Mechanical and electrical design

2404