Using a mini split a/c heat pump on your unit - Page 2 - Fiberglass RV


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Old 05-01-2013, 10:36 AM   #15
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Looking forward to seeing the install and hearing a review. Keep us posted. I too would like a smaller unit, maybe with time ....
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Old 05-01-2013, 12:15 PM   #16
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Always something, Thought I found the perfect one which as far as price goes it is but it is not a dc inverter which is a couple of hundred more. Getting one wit a DC inverter you can start and run it on a small generator no problem. I been searching and learning all day! The one I thought I was going to get is a single phase unit like one speed not like a DC inverter with variable speed. The one I was going to get is out of stock for another 2 weeks. I can get the single speed with everything I need for a install for 500. I don't think that is bad. If anyone wants to go that route let me know and I will give you the info. I will keep on searching for what I want...
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Old 05-01-2013, 12:19 PM   #17
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Shawn,

How much current does the 9000 btu unit draw?
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Old 05-01-2013, 01:08 PM   #18
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All depends on brand make model ect ect but 7 amp is about norm!
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Old 05-01-2013, 07:30 PM   #19
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Shawn, Out of curiosity I looked up prices for roof mounted AC units for comparison. They seem to be more expensive than your proposed solution. Definitely your solution could look better than a roof mounted unit.
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Old 05-01-2013, 07:42 PM   #20
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I can't really picture how this works. Could it be a less intrusive (drilling holes) option if you ran it in the little kitchen window? That way it could be connected and used while camping, but totally taken out when you weren't using it. Thinking I might want to use it to work in our garage during the summer too.....
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Old 05-02-2013, 06:27 AM   #21
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They dont work that way. The only hole one would need to drill is a 3 inch hole. behind the outside unit. One could drill from the bottom if they want. I wouldnt have a problem just drilling from the front. But I am not that far yet. These are DIY units as I have learned reading up on them. I asked my a/c buddy and he said it was a great idea. The lines have flare ends to connect to the indoor and outdoor units. It is really made for the DIY guy. I almost bought a unit yesterday for 488 off Ebay but he wanted to charge me tax and 150 for shipping on a no name brand. Yes is was also a heat pump.
There is one and I would like to share the link with you guys so you can see what I am talking about. Everything is pre charged so no a/c man is really needed. Some of these units come with a kit. In the kit the lines are already charged. It is a plug and play setup. Once you hook up the lines the R410A refrigerant is released. It would be nice to be able to undo the lines without releasing the R410A. But one has to think of it like a home unit but smaller. Yes you can always take it off but I am sure you will lose your R410A. Remember these are copper lines. I guess you could put shut off values on the ends so you can remove them without losing much R410A. That is a ideal. Or even buy a extra set of lines for the garage.
Here is the link, watch it and notice how the lines connect to the unit. This is not the system I am looking at, they cost way too much for what I want but they are the top of the line in split units and home units.
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Old 05-02-2013, 09:00 PM   #22
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I already made up my mind that I will be doing it. I am just researching brands and where to buy. Sams, Costco and Amazon are my main hitters. For easy return , just in case. So I hope to have it installed Sat or Sun.


So need to hear how this works out.
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Old 05-03-2013, 03:20 AM   #23
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Still haven't found a deal I like on the system. I am getting tired of researching and looking. I am the type of person that has to feel I am getting a good deal before I buy. And sometimes that means it takes awhile. I wished Costco was selling them again this year.
I was looking forward to a install this weekend but looks like the rain will stop me even if I had the unit now. I only have the weekend to play with my camper so things take forever!
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Old 05-03-2013, 05:18 PM   #24
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Everything is pre charged so no a/c man is really needed. Some of these units come with a kit. In the kit the lines are already charged. It is a plug and play setup. Once you hook up the lines the R410A refrigerant is released. It would be nice to be able to undo the lines without releasing the R410A. But one has to think of it like a home unit but smaller.
Shawn, more than twenty years ago I installed a whole house pre-charged AC system. The inside unit, outside unit and lines were all pre-charged. It was not difficult, worked well, and the price was right. After a few years it started to leak refrigerant and did not cool well. A friend and I recharged it using the proper AC gages, since the correct amount of charge is very important and it worked well again. By the next year it needed to be recharged again. After recharging it each year for a few years, we took all the connections apart and replaced the o-rings in the pre-charged fittings, purged it with nitrogen, evacuated the system and recharged it again . After a few more years it started to leak again. We replaced the entire system with a system that has the fittings brazed on and had it professionally charged. The new system has worked perfectly ever since. I would never get a pre-charged system again.
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Old 05-03-2013, 09:18 PM   #25
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I think Andy has mentioned an important point. Remember, these lightweight all molded towables have been described as an Earthquake Going Down The Road. In other words, some things can shake apart... which wouldn't happen in a sticks 'n bricks home.
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Old 05-04-2013, 05:24 AM   #26
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Yes, I thought about that and the only thing I came up with is the copper lines and the type of fittings used to connect them. The other parts is the same as any ac. They use copper for propane lines for the heaters and stove ect ect so thats the same. Some of the Splits use flexible SS lines which I thought was great and not flare fittings.The unit that goes inside has a weight about 20 lbs over about 30 inches so I would reenforce that area.
Putting in a split unit system is a new thought and I have doing way too much research on this. The pros are great like the dc inverter which mean less draw and low noise level. Also it is a heat pump. At this point the only worry I would have is the flare fittings. I didn't think that was a problem by a ac buddy of mine says he don't like them and when he installed his mothers he took them off.
I like the ideal of a pre charged unit. Makes it a DIY system. I am willing to try this if I can find a low cost system. I found one for 400 plus 100 for shipping but today were going shopping in Orlando at Costco and Ikea store for Boler goodies. Home depot sells Mini split but the fine prints state no returns on them. I hope Costco has them again this year! Like I told my wife. If it dont work out we can always use a low cost, cheap to run ac around the house. I just dont want to spend the big bucks for one. The range for what I want goes from 399 to 2000. And since this is a new idea and I am not sure things would work out.......
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Old 05-04-2013, 10:33 AM   #27
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I think it is worth pointing out too that the window AC units installed in a closet might be marginal in effectiveness in a scorching climate like Florida.
An earlier comment in this mentioned how much easier those might be but if the air is still hot inside the trailer it still is not worth the money or the effort.

I know for me no window AC ever approached the effectiveness of any Overhead ac and I imagine this split unit might well do the job better than a window unit?

So do find one and be the Guinea pig for us to see?!?!
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Old 05-04-2013, 11:38 AM   #28
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Quote:
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I've thought about these and it seems like it could work. Too bad they don't make a 5000 - 6000 BTU unit.
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What is wrong with a 9000 btu system? The weight is good, the size is good. Rather have too much than not enough.
I had a 5,000 BTU window air conditioner in my Fiber Stream. At first it was installed temporarily while camping in the front window, and removed while towing so the rock guard would close.
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Then I got tired of put it in the window, take it out of the window, put it in the window, take it out of the window, put it in the window, take it out of the window... So I permanently installed it in a side window.
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This seemed to be an improvement until I noticed:
  1. Only the front half of the trailer was cool. The rear half stayed warm.
  2. I could never get the unit sufficiently sealed up, and always had a small leak from the caulked up window frame when it rained.
I had not noticed the underwhelming performance when the unit was installed in the front window. I think now that a 5,000 BTU unit is most efficient when mounted in either the front or back for the best air-flow. The wall between the kitchen and the Dinette/Bedwomb blocked the indirect air-flow from the side window mount. This may not be a problem in a 13' trailer with no partitioning of the inside space.
Now I realize that my problem is that the Fiber Stream is not insulated at all. The 5,000 BTU unit mounted with indirect air-flow could not overcome that. So I took it out and got the smallest roof unit I could find.
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The 9,200 BTU roof Air Conditioner can overcome the radiant heat, and the air flows from it both forward and aft cooling the whole trailer.
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