Put the selector under the gear box on empty and pump the water in using the Manual switch...after it gets full (to the level you want it) put the selector switch on "recirculate"...then use the "automatic" switch or "manual" switch to recirculate the water per your desire. If you use the "automatic" switch to recirulate the water you can adjust the timing switch to recirculate the water at the timed interval you want.



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