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Why does window A/C have a bellows controlled drain valve?


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5 replies to this topic

#1 dougwalker

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Posted 29 June 2012 - 06:30 PM

LG thru-the-wall 1 ton A/C unit with heat... there's a drain valve in the rear corner of the pan, but why not just have a hole? The darn thing appears to be thermostatically controlled, here's it's part number:
5220A30006A

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#2 jumptrout

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Posted 29 June 2012 - 07:32 PM

It is there because accumulated condensation assist in cooling the refrigerant lines for correct operation.

#3 dougwalker

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Posted 30 June 2012 - 01:17 PM

Oh, as much sense as that makes, then when does it ever open? I haven't seen it open yet, and there are no wires going to it...
It appears to have a bellows so it must be thermostatically controlled.

#4 nickfixit

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Posted 01 July 2012 - 10:55 AM

Maybe it drains when it gets cold, or when heat functions are selected. They would not want water to freeze in the pan, and the water would not aid the heat functions.

When in cooling mode, the condenser fan slings water onto the hot condenser thus aiding the heat dissapation.

Yes, I need spell check... but why itsn't there one in Windows 7, or IE, or AOL, or this forum?

Stupid brain lets me down

Edited by nickfixit, 01 July 2012 - 11:00 AM.

" Giving numerical data to Sears management is like giving a monkey a machine gun. No one knows for certain what will happen, but you can be sure of two things... It will be real messy, and only the monkey will be unharmed"

#5 dougwalker

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Posted 04 July 2012 - 04:17 PM

hmmm.... opens when cold? That's a twist. One of these days I'm going to pop one of these in the freezer and then hit it with a blow dryer just for poops n giggles. THANKS FOR SHARING!
Best regards ~
Doug

#6 DADoESTX

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Posted 04 July 2012 - 05:03 PM

I do recall reading some tech info on a window unit of a brand I don't recall. A heat/cool unit, which had a condensate drain valve as NickFixIt suggests ... opens when cold so any standing water doesn't freeze and jam the condensor fan.




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