ABB AP100 Series Manuale - Pagina 7

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2.2 Water Supply for Water Wash Systems – Fig. 2.4

and 2.5

Important Note. Installation must only be carried out in

accordance with the local water authority and council

bylaws.

Caution. The maximum water pressure at the electrode

should not exceed 4 bar. At NO time should the sample

pressure be allowed to exceed that of the water wash

water supply. Fit a non return valve if this possibility exists.

Information. As all quick-fit connectors used in Water

Wash systems incorporate cutoff valves, tubes may

subsequently be disconnected on operational equipment

without sample loss or water wash discharge.

Suitable Solenoid Valve (user supplied)

Connect a suitable length of

solenoid valve. This tube terminates at the electrode installation point.

1 /4

in. i.d. p.v.c. tube to the outlet of the

Fig. 2.4 Installing the Water Wash Water Supply

Liquid

Junction

Water Wash

Nozzle

Fig. 2.5 Location of Water Wash Nozzle

Note. For optimum performance of the Water Wash

function in flow systems, the sample pressure should be at

least 2 bars lower than that of the water wash water

supply.

The water supply for the water wash system must come from a

suitable supply via a solenoid valve. The general specification

for the solenoid valve is:

Brass body: 2/2, NC

Orifice size: 3.0 / 4.0 mm

Port size:

" –

" BSP

Pressure:

0 to 6 bar

Coil:

110/115 V a.c. or 230/240 V a.c. 50/60 Hz

Before fitting the electrode cartridge system, install the water

supply as shown in Fig. 2.3.

Note. See Fig. 2.4 for recommended tubing.

Install a suitable solenoid valve to

the mains water supply feed.

Note. It is advisable to use a suitable

hose clamp.

Sensor

2 INSTALLATION...

To water supply – see

Important Note and

Caution, above.

P u s h

t h e

q u i c k - f i t

connector supplied, onto

the free end of the tube.

Note that the quick-fit

connector incorporates a

cut-off valve.