Question about Mastercool 67680 Evaporative Cooler Air Conditioner

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Why does there have to be a 'bleeder' line from the drain pan of a Master Cooler? Shouldn't the float keep the optimum amount of water in the unit?

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The previous answer is wrong. He describes an overflow line not a bleeder line. An overflow line is not optional for the reason previous answer describes except that if you go away for vacation or other reason the water to the cooler should be shut off.

On the other hand a bleeder line is optional but highly suggested.
The purpose of a bleeder line in any application like brake systems and evpaorative coolers is to get rid of some unwanted elements. In brake lines air is the unwanted element. In evaporative coolers it is particles, scale and mineral build up. This happens because the constant evaporation ( the whole principle of water coolers) leaves behind particles, scale and mineral. without a bleeder line these things build up in the water reservoir. You flush your system manualy with a bleeder line or with the right control box and a separate pump it can be done automatically. If you do it manually, let it run long enuff to discharge at least as much water as your reservoir holds. direct this flow to plants so a not to waste the water.

Posted on Jun 09, 2010

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Floats shut off the water at the proper level and alows filling when level is inadequate. Let's say that for some reason,a roof or wall unit is exposed to inclement weather without proper covering. The matting will cuse what ever liquid that hits it to drain into the pan, or sump. The plumbed supply will shut off if the float or valve doesn't malfunction. If you were away when such failure occured, The water would motr than likely find places to go which you eould prefer it not. Summary: It's a backup flood avoidance necessity. :-)

Posted on Jun 01, 2010

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Posted on Jan 02, 2017

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Send me a message here if you have questions.

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