idrania XPERT Manual De Instalación Y Mantenimiento General página 7

• With the valve in the filter position, slightly loosen the drain nut that is beside the pressure gauge, so as to
expel the air accumulated inside the filter.
• When you see that only water is released (for 1 to 2 minutes), re-tighten the nut.
4.2. FILTRATION
NEVER HANDLE THE VALVE WHILE THE MOTOR IS RUNNING
Backwash 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 in relation to the m
3
ºC 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
3
=
Hours required
Filter flow rate in m /h
3
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.
4.3. FILTER BACKWASHING
The backwashing process cleans the silica sand 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 that indicate the dirtiness of the sand:
• When a reduction in the return flow rate of over 30% of the system' s nominal flow rate is detected.
• When the manometer indicates excessive pressure (see the maximum working pressure given in the ins-
truction manual included with the device).
To clean the filter, proceed as follows according to valve type:
• 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.
• Turn the lever gently until the front rib is in line with the backwashing mode.
• 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 unit.
• Put the valve in the rinse position and connect the filter for a few seconds.
Installation and General Maintenance Manual
/h filter flow rate for a water temperature of approximately 21
3
42 m
3
Example:
5.5 m /h
3
- MONOBLOCK FILTER
= 7,63 hours
2 cycles of 4 hours with a break of 2 hours
7