Aqua Guard SandMaster SM19152STL Manual do Proprietário - Página 7
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Imprimir páginaBackwashing
The function of backwashing is to separate the deposited
particles from filter media grains and flush them from the
filter bed. Backwashing is achieved by reversing the flow of
water through the filter bed at a fairly high flow rate. This
high flow rate expands the filter bed and the water collects
the debris taking it to waste.
Conditions for Backwashing
Time for backwashing is determined by the following
conditions:
1. The flow rate through the filter bed decreases until it is
insufficient to meet the demand.
2. The removal efficiency of the filter bed decreases to the
point where the effluent quality deteriorates and is no
longer acceptable.
3. When the pressure gauge reading is 10psi higher than the
start up pressure.
4. If the filter is connected to mains water, pressure rise is not
an accurate indicator as mains pressure tends to fluctuate.
It is best to rely on the actual flow rate.
NOTE: We recommends that you backwash a swimming
pool sand filter in a residential installation at least once
a month.
Importance of Backwashing
The importance of backwashing cannot be overstated.
Dense filter media can become "packed" without proper and
frequent enough backwashing. Debris will remain trapped
and create channeling within the filter bed. This will result
in the filter bed exhausting early. If debris is not flushed
from the media grains, the filter bed will become dirtier and
dirtier as time goes on until the filter operation fails.
Backwashing Instructions
1. Switch off the Pump/ Close the Inlet Valve.
NOTE: If a pump is installed, switch the pump on and off,
instead of closing and opening the Inlet Valve.
2. Release the filter's pressure by loosening Pressure Release
Valve until the Pressure Gauge needle drops to zero <0>.
3. Re-tighten Pressure Release Valve.
4. Depress and turn Handle 180° to the BACKWASH position.
In the BACKWASH position, the water flow is automatically
reversed through the filter so that it is directed to the
bottom of the filter vessel, up through the sand, flushing
the previously trapped dirt and debris out the waste line.
5. Switch on the Pump/ Open the Inlet Valve. Backwash
water will flow out through drain pipe.
6. When the backwash water in the sight glass appears clear,
Switch off the Pump/ Close the Inlet Valve.
7. Depress and turn the handle to the RINSE position. In the
RINSE water flow is directed through the filter bed and
out of the filter through the backwash outlet. This process
settles the filter media bed into place and ensures any dirt
or debris is rinsed out of the filter, preventing possible
return to the pool.
8. Switch on the Pump/ Open the Inlet Valve. Rinse water will
flow out through the drain pipe.
9. When the rinse water in the sight glass appears clear.
Switch off the Pump/ Close the Inlet Valve.
10. Depress and turn the handle to the Filter position and
Switch on the Pump/ Open the Inlet Valve for normal
operation.
Maintenance
The filter media will only require replacement once it has
reached the limits of its designated life. Refer to the product
information of the particular filter media used.
To ensure the maximum life of the selected filter media,
please follow the procedures below:
1. Backwash the filter regularly according to the instructions
set under "Backwashing".
2. Refer to the specifications of the filter media used and
implement regeneration procedures accordingly.
3. Maintain a correct chemical balance your pool/spa water.
The chemical balance of water is a relationship between
its Ph, total alkalinity, calcium hardness and water
temperature. The water must be maintained at all times to
the following:
PH LEVEL: BETWEEN 7.2 & 7.8.
TOTAL ALKALINITY: BETWEEN 80 & 150ppm.
CALCIUM HARDNESS: BETWEEN 150 & 300ppm.
And within these tolerances be balanced to the Langelier
Saturation Index within a range of -0.2 to +0.2.
NOTE: Testing kits are available to test the water
yourself or alternately bring a sample of the water to a
professional pool store.
4. Mains water and rural water supplies need to be
monitored. Saturation (life) in mains water or bore (rural)
will vary depending on water quality.
5. To prevent damage to the pump and filter and for proper
operation of the system, clean pump strainer and skimmer
baskets regularly.
AquaGuard | SandMaster
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