Aqua Guard SandMaster SM16102S Gebruikershandleiding - Pagina 7

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Backwashing

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.

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