Cleaning - Pentair Sand Dollar SD40 Guide D'installation Et D'utilisation

12
1. To clean the exterior of the pump and sand filter system of dust and
dirt, wash with a mild detergent and water and then hose off. Do not
use solvents.
2. If internal filter maintenance is required, sand may be removed by
removing the entire drain spigot from the bottom of the filter and
flushing with a garden hose.
3. The filter is a pressure vessel and should never be serviced while under
pressure. Always relieve tank pressure and open air bleeder on filter
before attempting to service the filter.
4. When restarting the filter always open the manual air bleeder on the
filter and STAND CLEAR OF FILTER.
5. The strainer basket in the pump should be inspected and cleaned twice
each week. Remove the clear lid and the basket, and clean debris from
basket. Inspect the lid o-ring; if damaged, replace. The pump seal
requires no lubrication. The pump motor should only be serviced by a
motor service center.

Cleaning

1. The filter on a new pool should be backwashed, and cleaned after the
first 48 hours of operation to clean out construction debris. There are
three different ways to identify when the filter needs backwashing:
a) The most accurate indicator on pool systems with a flow meter is to
backwash when the flow decreases 30% from original (clean filter)
flow. For example, if the original flow was 60 GPM, the filter should
be backwashed when the flow is reduced by about 20 GPM (or 30%)
to 40 GPM.
b) A more subjective and less accurate indicator is to observe the
amount of water flowing from the flow directionals located in the wall
of the pool. The filter should be backwashed once it is detected that
the flow has been reduced.
c) The most commonly used but least accurate indicator is to
backwash when the filter gauge reading increases 10 psi over the
initial (clean filter) reading.
2. It is important not to backwash the filter solely on a timed basis such
as every three days. It is also important to note that backwashing too
frequently actually causes poor filtration. Factors like weather
conditions, heavy rains, dust or pollen, and water temperatures all
affect the frequency of backwash. As you use your pool, you will
become aware of these influences.
Pump and Sand Filter System Installation and User's Guide