ABB 9408 750, Instruction Manual

Page: 10 / 20

8
Install a suitable solenoid valve to
an appropriate water supply.
1
Connect a suitable length of
1
/
4
" i.d. reinforced p.v.c. tube
to the outlet of the solenoid
valve; secure with a clamp or
clip.
Push the quick-fit
connector supplied onto
the free end of the tube;
secure with a clamp or clip.
Note that the quick-fit
connector incorporates a
cut-off valve.
To water supply – see
Important Note and
Caution above.
Suitable Solenoid Valve (user supplied)
Plug the quick-fit connector
onto the mating coupling
fitted to the sensing system
incorporating the water wash
option.
Note. Allow enough tubing to permit handling of the
system in and out of the sample. Alternatively,
disconnect tube at the quick-fit connector.
2
3
4
3.3 Water Supply for Water Wash Systems – Fig. 3.6
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 50 psi (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.
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. A general specification for
the solenoid valve is:
Brass body: ....... 2/2, NC
Orifice size: ....... 3.0 / 4.0 mm
Port size: ...........
1
/
4
in –
1
/
2
in BSP or NPT
Pressure: ........... 0 to 6 bar
Coil: ................... 24 V a.c., 110/115 V a.c. or
230/240 V a.c. 50/60 Hz
Note. See Fig. 3.6 for recommended tubing.
Fig. 3.6 Installing the Water Wash Water Supply
…3 MECHANICAL INSTALLATION