Operation - GRE AR7051 Installation And Maintenance Manual

5 OPERATION

The operation of this filter is based on the filtration capacity of the silica sand which is inside. The water in the pool is driven by the
filter pump and forced to pass through the silica sand. The sand acts as a filtering element which retains the impurities in the water.
The environment, trees, pollen, insects and frequency of bathing, amongst other factors, determine the dirtiness of the water in the
pool. Depending on these factors, the silica sand in the filter should be cleaned with greater or less frequency (see section 5.3).
To keep the pool water in good condition, use the chemical products recommended by the manufacturer (chlorine, alga
protection, flocculants, etc.).
CHEMICAL PRODUCTS SHOULD NEVER BE PLACED IN THE BASKET OR THROUGH THE FILTER, AS THIS WOULD
DETERIORATE THE MATERIALS OF THE UNIT AND LIMIT ITS EFFICACY.
5.1 PRIMNG THE FILTER
The filter must be correctly primed at all times. If the filter is not primed it means that an air chamber has been created inside which
causes defective circulation of water. This prevents proper filtration of the water by the silica sand and is detrimental to the motor.
The filter may become unprimed for several reasons:
• Starting up a new unit.
• Starting up a unit after an extended period of inactivity.
• Following use of a suction bottom cleaner.
• Air absorbed by the skimmer due to the low level of water in the pool.
• Due to incorrect use of the unit, suction cover or skimmer plug.
When is the filter unprimed?
We can see that the filter is unprimed when:
• The water entering the filter sounds like it is falling freely. This indicates that an air chamber has been created between the
water inlet and the silica sand.
• An excess of air bubbles is released through the return nozzle.
• The bottom cleaner (not supplied) does not operate with suction, and the silica sand remains clean after cleaning.
How can we prime the filter?
• Verify that the suction hose is connected to the skimmer and the passage is clear (the plug is not in place).
• With the valve on the filter position, slightly loosen the drain nut which is beside the pressure gauge, so as the air
accumulated inside the filter can leave.
• When you see that only water is released (for 1 to 2 minutes), re-tighten the nut.
5.2 FILTRATION
NEVER HANDLE THE VALVE WHILE THE MOTOR IS RUNNING
Carry out a wash of the sand before the first filtration. (Part 5.3)
The valve should be in the filter position (FILTER). The service life of the filter will be longer if the periods of continuous operation do not exceed 4
hours. The need for daily filtration is determined by the volume of water in your pool in m
of approximately 21ºC and placed 3.5 m from the pool. Leave the motor at a standstill for at least 2 h between each 4 h period of operation.
Pool volume in m
Filter flow rate in m
In the initial filtration treatment it is important to leave the filter at a standstill for the periods indicated. It is recommended
that you increase the amount of time in ratio to any temperature rise in the pool.
6
www.PiscinasDesmontables.es
3
= Hours required
3 /h
www.PiscinasDesmontables.es
3 in relation to the m
42 m 3
Example:
=
5.5 m 3 /h
MONOBLOCK FILTER -
3 /h filter flow rate for a water temperature
7.63 hours
2 cycles of 4 hours with a break of 2 hours
Installation and General Maintenance Manual