Teuco 630 Manuel De L'utilisateur page 48

EN
CLEANING THE SAND FILTER
The sand filter consists in a bed of micropearl quartz sand.
During operation, organic impurities suspended in the pool water are trapped by the sand medium as the
stream passes through the filter.
The design of the filter guarantees uniform distribution of the water passing through the sand bed, preventing
any tendency to form localized channels that would significantly reduce the filtering capacity of the medium.
When a new system is started up for the first time,
make a note of the filter pressure gauge reading.
The sand in the filter is cleaned by BACKWASHING:
- when the pressure indicated by the gauge exceeds
the value first recorded (newly installed system) by
0.5 bar
- whenever pressure reaches 1.5 bar, in any
circumstances.
Failure to observe this general rule can result
in serious damage to the system and invalidate
the warranty.
Set the control panel switch to the "STOP"
position every time the SELECTOR LEVER is
shifted.
• Position the selector valve on "BACKWASH"
and run the pump in "MAN" for 1 minute
approximately.
Check the state of the water by inspecting through
the sight glass on the selector valve.
• Position the selector valve on "RINSE" and run
the pump in "MAN" for 30 seconds approximately.
This step serves to resettle the sand bed after
backwashing.
• Return the valve to the "FILTER" position and
start the pump in "MAN". Backwashing uses a
considerable amount of water from the overflow
tank.
If the backwash procedure stops as a result of there
being insufficient water in the tank, wait a few minutes
for the system to make up the level (solenoid valve
opens automatically to allow water in).
After several years operation, the filtering action
of the sand may become less effective; if so, have
the sand renewed.
When this operation becomes necessary, contact
an authorized Teuco service centre.
48
630