Smeg WO-20, Manual Use And Maintenance, Page: 11 / 24

7596040 – MANUALE WO-20 EN 21052018 REV.1
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4 FUNCTIONING
4.1 FIRST START-UP
WARNING
The first start-up of the machine must be done by the installer.
The installer checks the correct functioning of the machine. Before starting the system,
carry out the conditioning procedure of the cartridge: with the conditioning tap open,
open the tap upstream and wait 5 minutes
Insert the power plug in a grounded socket 230V 50Hz equipped with efficient grounding.
The machine is ready to operate.
It’s recommended to do two cycles of filling/emptying to drain out the substances for the
preservation of the membranes.
Check for leaks from the hydraulic circuit.
CONSIDER: for the complete filling of the presurized tank about 5 min are needed
4.2 NORMAL USE
For normal use of the equipment it is necessary to keep the system always on and hydraulically powered.
The system starts up automatically for each request to the tap.
Every 6 hours, the machine automatically opens the inlet valve, so that the membranes are washed for 2
minutes.
4.3 MIX - BY-PASS
The mixing valve, installed on the back of the machine, allows to vary the produced water salinity: it uses the
filtered water taken after the pump and it mixes it with the permeated water downstream of the
membranes. The device must be calibrated in the installation phase.
With WO-20, treated water retains about 10-15% of the original saline.
In the event of a machine malfunction, this valve allows to exclude the osmosis system and to supply filtered
water downstream.
4.5 LOW PRESSURE ALARM
If low pressure alarm occurs, machine stops and makes three BEEP and display alarm.
The machine restarts automatically after 1 minute. The min pressure switch is ignored for 20 seconds at
machine start.
If low pressure alarm repeats consecutive, the restart delay increases automatically.
4.6 LEACKAGE ALARM
The machine has two leackage sensors inside. In chase of leackage, the machine makes a long BEEP and stop
the machine. To restart the machine, disconnect and reconnect the power plug pressing the button.
When the alarm is pre-set the card makes three BEEPs.
WARNING
The opening and the control of the anti-flooding probe must be done by qualified
personnel (see §7).
4.7 INACTIVITY
WARNING
Absolutely avoid the membrane dehydration that would irreparably damage its
functioning.
We recommend that, whenever the unit remains stationary for a period of almost one
week, let the water run for at least 10 minutes before to take water.
For longer periods of stop it is recommended to follow the instructions given in the
paragraph "set aside" (see §6.4.1).