Astralpool KEOPS Manuel D'installation Et D'entretien page 12

4.2. BACKWASHING
The solid particles in a pool that are collected in the main drain and skimmers are retained by the sand in the
filter and, therefore, the amount of water that passes through it constantly decreases. This is why the pressure
gradually rises. When the pressure reaches 1,3 kg / cm , a "BACKWASH" must be performed.
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This is done as follows:
The selector valve should be set to the "BACKWASH" position and the pump will start to work. Let it run for 2
minutes. The selector valve's sight glass should nevertheless be observed to check that this is the right time, as
the process will depend on how much dirt has built up in the filter.
4.3. RINSING
After having performed a filter "BACKWASH" and before turning the filtration system on, it is recommended to
"RINSE" the filter to prevent the initially cloudy water following the backwashing process from flowing directly
into the pool. To do so, turn the valve to the "RINSE" position while the pump is off. Then let the pump run for
approximately 1 minute. The selector valve's sight glass should nevertheless be observed to check that this is
the right time, as the process will depend on how much dirt has built up in the filter.
4.4. RECIRCULATION
When the selector valve is in this position, the water from the pump circulates directly into the pool without
going through the filter.
4.5. DRAINING
Should there not be a drain at the bottom of the pool, it can be drained through the filter pump by setting
the valve to the "DRAIN" position. To perform this operation, open the valves on the main drain and close the
skimmers and pool cleaner.
4.6. CLOSED
This position stops water from going into the filter.
5. MAINTENANCE
5.1. FILTER
Do not use solvents to clean the filter, as this could damage the gloss coating on the filter housing.
Replace any damaged components and seals whenever required.
Backwash and rinse the filter as per the operating instructions.
12 COMPACT FILTRATION HOUSING - INSTRUCTION AND MAINTENANCE MANUAL