Operating instructions

Repair instructions

Lime deposits or dirt on the membrane can result in the valve not opening

or closing correctly. The valve should therefore be cleaned at regular

intervals, depending on operating conditions and water quality.

Valve does not open or close correctly

• Check that the motor is correctly energised

• Check that the piston rod can move freely

• Check that the membrane is not clogged with deposits

When changing the motor and gear assembly, note the following

cable connections:

Brown cable: 60 Hz

Blue cable: Common

Black cable: 50 Hz

Pre-tensioning the return spring

Remove the valve casing.

1. Turn the return spring so that the arm of the spring bears against the

stop screw.

2. Fit the piston rod so that the slot in which the spring is to engage is

aligned with the casing. Place the valve casing over the return spring

so that the pin on the spring fits into the slot in the piston rod.

3. Turn the casing through one turn clockwise. This will engage the pin

on the spring in the piston rod, tensioning the spring by about 1/4 of a

turn due to the rise of the piston rod.

1605

Mechanical and electrical design

Stop screw

Spring extension

Return spring pin

Fig.