Deltec TC 2561 Instructions D'emploi page 14

open the water level adjuster (WAL) fully by turning it anti-clockwise (Diagram f)
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switch on water supply through skimmer
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adjust the water level inside the skimmer with the feed line shut-off cock and the WAL
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to somewhere between the top and bottom of the skimmer neck, see (Diagram g)
check the skimmer for possible damage and check the whole skimmer installation for
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leaks.
switch on the skimmer pump
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to prevent initial over foaming and flooding of the skimmer cup, adjust the fine foam
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level in the cup's riser tube to the bottom plate of the skimmer cup. This is achieved
by turning the WAL
wait a minimum of 24 hours for the final adjustment. Turn the WAL so that the fine
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bubbles start bursting app. half way up the cup's riser tube.
for dry foam turn the (WLA) anti clockwise, for wet foam clockwise.
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Important: Never allow the pump to run dry.
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f) Water level adjuster (WAL)
Starting the skimmer
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g) Skimmer cup