2011/01 - Indice de révision : B - Code : 0026730
17/44
Before using the filter for the first time, carry out a backwash to clean it and remove any excess sand or impurities.
After back washing the filter, change the valve position to filtration and switch the pump on. The black hand on the pressure
gauge will indicate the filter's nominal pressure. This pressure varies depending on the pump flow rate, static pressure and
pressure drops across the piping.
To preserve a record of this nominal pressure, turn the dial of the pressure gauge until the blue hand is aligned with the black one.
After a certain time, a drop in the flow rate may be noted at the return fittings. This is caused by the gradual build up of impurities in
the filter or the pump pre-filter basket.
1°) filter pressure is below the pressure indicated by the blue hand: clean the pre-filter basket and the skimmers:
- Stop the pump,
- Put the 6-way multiport valve to "CLOSED",
- Close the suction valves A, B, C, D (skimmers, main drain) and the return fitting valve E,
- Open the pre-filter and take out the basket,
- Using a jet of water remove any debris,
- Put the basket back,
- Replace the lid of the pre-ilter making sure that the seal is correctly positioned and that there is enough water to
prime the pump,
- Clean out the skimmers.
- Put the 6-way multiport valve to "FILTRATION",
- Open the suction valves A, B, C, D (skimmers, main drain) and the return fitting valve E,
- Restart the pump,
- Purge air from the filter.
This operation should be carried out each time the pool is vacuumed using a brush on a suction line, and at least
once a week.
2°) filter pressure rises out of the green zone: Back wash the filter
- Stop the filter,
- Check the pre-filter for debris. (If there is a build-up of dirt clean it out as described above),
- Put the 6-way multiport valve to the "WASH" position,
- Open the 1/4 turn valve (F) on the outflow pipe,
- Turn the motor on,
- Monitor the water colour through the turbidity sight glass on the 6-way multiport valve.
Caution, cleaning will start after a few seconds. (The water becomes very cloudy)
- As soon as the water in the turbidity sight glass becomes clear, stop the pump,
- Put the 6-way multiport valve to the "RINSE" position,
- Turn the pump on for about 20 to 30 seconds. The purpose of this step is to evacuate any remaining impurities
and settle the sand,
- Stop the pump,
- Put the 6-way multiport valve to the "FILTRATION" position,
- Restart the pump,
- Close the 1/4 turn valve (F) on the waste line.
After back washing, the black hand on the pressure gauge should be realigned with the blue hand, that is the
pressure reading should return to the nominal pressure
In the event that the pressure indicated by the pressure gauge does not drop after back washing the filter once (or
even twice) contact your installer.
BACk wAShING ThE FILTER
