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Jerry Liebler (165.121.35.52)

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Posted on Tuesday, July 13, 2004 - 2:11 am:   

As I promissed I'm trying portables. So far my results aren't all that great. But my bus is completely uninsulated (no interior at all). I had 1 Sunpentown 12,000 Btu and 1 10,000 Btu Sunpentown with 1 sitting behind the driver and 1 sitting behind the copilot on a recent 5000 mile trip accross the country & back (Oregon to Kentucky). My only installation was a pair of Styro foam adapters to exaust the hot air out the grills that used to be fresh air inlets. My intention was to run both off of the Trace SW2512 and the bus alternator. It didn't work, I had to use the generator to run both. When the temperature rises the 12,000 btu unit draws way more than rated current, rating is 9 amps & at 100F it was drawing 16 amps. But the 10,000 Btu unit rises less going from 6 rated to 7 or 8 amps. I complained to Sunpentown & got them to allow me to exchange the 12 for another 10 so on my next trip I'll be able to run both off the engine. It's hard to judge the effectiveness due to the lack of insulation but the driver and copilot were comfortable with both running and the fan on the windshield blowing even when we were traveling thru 95 degree sunny areas.
I need to get some insulation to have any useful data. To improve the performance I may try to duct outside air to the condensors or I may cut them apart to make homebrew ductless splits but even as bought they do work somewhat.

Regards
Jerry 4107 1120
madbrit (67.136.110.123)

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Posted on Tuesday, July 13, 2004 - 5:16 am:   

The ones I tried 10 years ago from Sears never worked worth a damn, but then again I said that at the beginning of the other thread about portables. The ones I bought would not even run for more than 10 minutes without shutting down due to over heating, we even tried using a swamp cooler to cool the trailer to give the a/c a fighting chance but it still shut down. Sears refunded our money and never stocked them again it that town.

Peter.
John that newguy (199.232.244.148)

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Posted on Tuesday, July 13, 2004 - 7:10 am:   

This topic seems to come up pretty often. Does anyone have experience
converting either a home window unit, or a conventional automotive AC
unit to be operated in a bus 120v (and/or 12v) system? It would seem to
me, that the compressor in either type unit should be able to run with
either a 12 or 120v motor. One unit should be enough to cool a specific
area, with possibly three needed to cool the entire coach?
Ed Roelle (68.62.25.203)

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Posted on Tuesday, July 13, 2004 - 12:26 pm:   

I have successfully built split A/Cs from 3 window air conditioners. Cools excellent. If you would like details, just email with any questions.

Ed Roelle
edroelle@yahoo.com
Flint, MI
John that newguy (199.232.244.27)

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Posted on Tuesday, July 13, 2004 - 9:40 pm:   

Ed... Do you have any pictures, etc of that conversion? I'm sure there's
at least a few dozen of us that'd love to know everything about how
you did it.

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