GRE AR715 Manual Especifico página 9

5.3 FILTER BACKWASH
The backwash process cleans the silica sand from inside the filter. This is achieved by reversing the direction of water circulation
with the top selector valve. This process should be done regularly. For this purpose you should observe several factors which
indicate the dirtiness of the sand:
• A decrease in the return flow rate is detected, after checking that the pump is well primed.
• Pressure gauge indicates that there is excess pressure (> 1.2 bar or needle pointing between yellow and red, or on red).
To clean the filter, proceed as follows according to valve type:
4 function valve: (Fig. 6)
• Disconnect the filter from the mains. Never move the selector valve while the motor is running.
• Loosen the upper triangular knob on the valve until you can lift the cover and turn it (Fig.6). Place the valve on the backwash
setting, reinserting the cover in its housing and re-tightening the knob by turning it. Do not over-tighten the knob so as to
avoid damaging the valve.
• Connect a hose to the valve waste outlet from the valve and direct the other end of the hose to a drain or sewer.
• Run the filter for approximately 2 minutes (until impurities no longer run out with the water).
• Stop the filter and leave it to rest for 2 minutes so as to let the silica settle and stop it from running out into the pool.
• Reset the valve to the desired setting (filtration or closed) (Fig. 6) and remove the hose from the drain outlet.
For 5 and 6 function valves: (Fig. 7 and Fig.8)
• Disconnect the filter from the mains. Never move the selector valve while the motor is running.
• Firmly press the upper selector valve, displacing the front rib, until you can turn it (Fig. 7).
• Turn the control gently until the front rib is in line with the backwash operation (Fig. 7).
• Connect a hose to the valve waste outlet from the valve and direct the other end of the hose to a drain or sewer.
• Run the filter for approximately 2 minutes (until impurities no longer run out with the water). In the valve model fig.8, this
can be seen through the transparent window on the side.
• Stop the equipment.
• Put the valve in the rinse position and connect the filter for a few seconds (Fig. 7).
• Stop the equipment, put it in the desired filter position (Fig. 7) and remove the hose from the waste position, if you desire.
5.4 DRAINING THE POOL
The following accesory is aviable to help drain the pool:Portable submersible pump AR2071.
The filter allows you to drain nearly the entire pool after the bathing season has ended. In order to do so, you should set the
top selector valve on the waste setting (Fig. 6) (Fig. 7) without plugging in the filter and connect a hose to the valve waste
outlet and direct the other end to the drain or sewer.
Depending on the skimmer model (see specific manual), proceed as follows:
5.4.1 With wall skimmer (for Dream Pool swimming pools):
• Remove the inner basket from the skimmer and cover the suction inlet with the plug supplied for this purpose.
• Disconnect the suction hose from the skimmer inlet. Loosen the clamp which secures the hose, supporting it so that no water
leaks and it loses priming.
• Remove the hose, covering the end so it remains primed, and submerge it immediately in the pool.
• Weigh down the end of the suction hose with a heavy object which will not damage the liner so that it is forced to sink to
the bottom of the pool.
• Start up the pump and drain the pool. Remember that the filter will not fully drain the pool. When a few centimetres of
water are left and the pump no longer sucks in water, turn it off.
• If you are going to refill the pool with water, first manually remove the remaining water without damaging the liner.
• If you are going to disassemble the pool, you can fold the bag with the remaining water in the centre and after removing
the plate, unfold the bag to empty it completely. This operation should only be done when you are disassembling the pool.
Installation and General Maintenance Manual
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- MONOBLOCK FILTER 7