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Old 02-07-2014, 03:26 PM   #29
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the big "Two Ton" sucker wants 25A when both compressors are running... you'd probably want to wire for 50A, or put in 2 30A systems and know that you could just run the lights/fridge/etc. off the 15A plug on the pedestal and have the heat pump running on its own off the 30A plug. I wonder if it's quiet enough to live under a bed... you'd be giving up under-bed storage where the unit is, but just glancing at the plan for a '60 Sov it looks like it might fit aft of the wheel well, partially under the bed and partially under a wardrobe?
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Old 02-07-2014, 03:28 PM   #30
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Ah, and the cool part is my 1960 sovereign is a custom 33 footer so it's basically crying out for a beast of an AC unit.
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Old 02-24-2014, 08:21 PM   #31
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William, sent you a PM. Thanks for the offer.

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Old 02-24-2014, 10:20 PM   #32
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I just stumbled across this thread and find it very interesting. Thanks for starting it truckasaurus.

I bought my 66 Airstream because I thought it was particularly attractive, especially for a old Airstream, but the Armstrong AC unit on top was an abomination. I have since removed it and use a window unit when I find it necessary to have AC. This works fine for this trailer as we use it mostly in the mountains and rarely use the AC. I can actually run the AC off my 1000 watt Honda Genny.

I just bought a 95 34'. It has one AC unit on top. I am not sure how well the AC will work, but I know that we will probably use it a fair amount when we are camping in this trailer. A split system might work in this trailer. Of the units mentioned in this thread it looks like the 2 ton Dometic RV split system heat pump might work the best for my 34' trailer. I am thinking of a 2 zone design- one small zone with the air handler in front hidden behind the front cabinet and a second zone with a larger air handler in the upper area of the large wardrobe.

I look forward to following this thread.

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Old 02-24-2014, 10:33 PM   #33
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Note- I made a mistake. The 2 ton unit is a Coleman and not a Dometic.

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Old 02-25-2014, 04:03 AM   #34
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I want to step into the light and stop lurking…
Most truck units do not run off of the truck. They have a separate diesel motor that runs the AC. The condenser is rather small and could be hidden easily, but the motor is about 2 foot cubed. With a large enough trailer, it might be built into the trailer much like the Onan generators used to be. I get a lot of truck traffic in my business park and I am always talking to the guys about their AC units. I am told the motor for the AC is very efficient, burning about 1 gallon a day.
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Old 02-25-2014, 05:51 AM   #35
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I wonder if a split system runs quieter...
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Old 02-25-2014, 06:58 AM   #36
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I spent 50 bucks on a slightly used window unit, mounted as needed using a small wooden table with the legs cut off on one side so they rest on my propane tanks. The base of the table sits over the window frame. It keeps us cool and is pretty quiet. When not in use it sits covered up in the truck.

My 66 looks better without an a/c on the roof.
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Old 02-25-2014, 08:30 AM   #37
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Hey Frank, good to have you along for the split air con adventure. I'm actually pretty excited that the split AC route seems to be gaining a bit of momentum at the moment as it means there may be more installs underway by the time I very slowly get around to working on my Sovereign.

I had a quick look at the those truck APU generators out of curiosity and they looked so heavy duty I didn't even think about adding one to my trailer. I read that truckers are being pushed towards using shore power at their rest stops or even blue power units that store the cold and release it slowly to cut down on all the diesel idling.

Even with my megalomaniacal nature I think a diesel APU might tip me over the edge especially after dolling out all the cash on a Honda EU3000. Still, I do like the idea of onboard power generator….
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Old 02-25-2014, 01:15 PM   #38
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I bet the mini motor could power the trailer too. They are very quite.
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Old 02-26-2014, 07:53 AM   #39
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I see lots of lower priced split units, and you know these are popular all around the world..Anyone used one that doesn't break the bank?
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Old 02-28-2014, 09:59 AM   #40
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Foreign Dometic

I'm liking some of these a lot. I'd need two units. They're not super cheap and are 240 Volt spec'd in these links but at least they look like well engineered RV AC units. Just more info to consider.

Truma Saphir comfort RC airconditioner - brought to you by Dometic - YouTube

TRUMA: Saphir Comfort Air Conditioner, 2.4kW Cool, 1.7kW Heat | Caravan Built-in Airconditioners | CaravansPlus

44080-02 Truma Saphir Compact Air-Conditioning Unit For Sale at The Truma Centre

AIRCOMMAND Jabiru reverse cycle Airconditioner | Caravan Built-in Airconditioners | CaravansPlus

Also I've been looking at the BAL air exchanger for fresh air replenishment, at least it's cheap….
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Old 02-28-2014, 10:56 AM   #41
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what exactly does the BAL thing do?
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Old 02-28-2014, 11:46 AM   #42
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http://norcoind.com/bal/downloads/af...20Products.pdf

It allows you to switch out stale air for fresh and retain a high percentage of the ambient in trailer heat or cold. If you scroll down the linked pdf a bit to the Air-port it describes it better than I would. I'm sure it's not a must have but I was thinking how my super sealed up trailer would allow me to keep breathing and this was the first product my Googling came up with. Granted I will most likely have a bath vent fan and a cooktop fan but they would not always be open. Just thinking.
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