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Old 07-30-2012, 09:24 PM   #1
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Second air conditioner

We have a Sabre 32RCTS with a 15,500 BTU a/c in the living area. On really hot days it does not cool down the bedroom in the front even if we close the vent in the back. It is wired and set up for a second a/c in the bedroom. Our question is what size a/c is appropriate?
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Old 07-30-2012, 09:34 PM   #2
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Quote:
Originally Posted by Jenrnfnp View Post
We have a Sabre 32RCTS with a 15,500 BTU a/c in the living area. On really hot days it does not cool down the bedroom in the front even if we close the vent in the back. It is wired and set up for a second a/c in the bedroom. Our question is what size a/c is appropriate?
13,500 BTU in the bedroom is what my 2012 Sabre 31 RETS came with. You can come close to using the bedroom to cool your beer when it is on high in 100 degree weather. The living area 15,000 BTU unit keeps the main area comfortable, not cold, in 100 degree heat but it runs continuously. With all the windows that is about all you can expect. I put some Reflectix on some of the windows facing the afternoon sun. That helps a lot. I am sure glad my dealer orders all his Sabres with the second air conditioner. Not a Sabre on his lot that does not have two A/Cs.
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Old 07-30-2012, 09:44 PM   #3
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We have a 32RCTS and live in Texas so we had a 2nd a/c installed as part of our purchase . If memory serves me correctly it's a 13,500 BTU and makes all the difference in the world. It still takes a while to cool the rig down when you pull in to camp in the early afternoon in 90+ degree heat but it will get the job done. You will need 50 amp service to run your 2nd a/c, but when the weather cools you can go back down to 30 amp service and use the primary a/c only. Get yourself a 50 amp to 30 amp "pigtail" and you will be set.
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Old 07-31-2012, 01:04 AM   #4
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I can't tell you too much on what size second air conditioner to put in, but looking at other posts it looks like a 13.5k is recommended. One thing I would recommend before you make the investment in a second air conditioner though is that you go through all of your vents and check for "gaps" between the vent shaft and the vents themselves. I would also recommend pulling down the air conditioner cover from the inside and look at both the right and the left hand side shafts (when the quick cool vent is closed the air is forced through them.) Check to make sure that there are no gaps or holes around the shafts themselves.

I had a similar problem to yours with the camper not cooling down and was going to invest in a second AC unit, unfortunately my Sabre was not wired up for a second AC from the factory so it would have been a little more costly. When I pulled all of the vents and the AC cover I found multiple areas where the cold air from the AC unit was essentially escaping into the area between the vent and the roof. The side that forced air up to the living room and front bunkhouse actually had about a 1/2 inch to 1 inch gap nearly all the way around it. Closed them all up with some aluminum tape and was ready to give it a whirl.

Just got back from a trip to the Lake of the Ozarks where it was 100+ every day (no shade on the camper). Amazing what the difference in air flow was and the inside of the camper was a comfortable 78-80 degrees, which I never would have achieved before doing this (I also have a 15k AC unit). Total cost for me, about $6.00 in tape and my time.
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Old 07-31-2012, 07:09 AM   #5
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QCCowBoy,
Can u post pics..I'm having trouble visuallizing the gaps you speak of.


Thanks
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Old 07-31-2012, 01:16 PM   #6
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I will see about taking some pics this evening. I wont be able to show you the gaps as I have sealed them up, however I will try to outline the areas where they used to exist.
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Old 08-01-2012, 01:34 AM   #7
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Sorry it took a while to get these, had a few things going on this evening. I will admit I am not an expert, but here are the steps and some pictures of what I did. The difference after I was done was night and day (made my wife and kids very happy!)

Here are some of the pictures that I captured (going to have to split this into a couple of posts):

First start off with the air vent:

You need to remove the cover:

Once you have the cover off you will most likely see some tape already:

You will actually need to feel around the inside of the vent for small gaps or holes where taping was missed. When you are done you should not have any gaps, took me quite a bit of tape as there were some big holes.

To put the vents back on, just do the reverse of taking them off, the louvers in the vents can be a bit of a pain at times and I had a couple that would actually continually shut from the force of the air. I just put some of that tacky putty used for handing my kids artwork on the walls in between the ends of the louvers and all is well!

Repeat for each air vent in your camper.
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Old 08-01-2012, 01:37 AM   #8
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Now on the the AC unit itself.
You need to remove the filter first then there will be a couple of plugs that cover two screws. Remove these. In total on my unit there were six screws.

Once you have them off, here are the areas that you want to focus in on:

Looking at the picture above, the bottom part is where the air is forced into the vents that feed into the cabin when the quick cool is closed. The top part is the return vent from the cabin where the air is recycled. In the picture below I tried to outline where the gaps existed (as you can see they are now taped up, and yeah I probably went a bit crazy with the tape

There are two different air shafts in my unit, one on the right and one on the left (these would be found where the air is forced into the cabin.) One feeds the back of the camper and the other the front. You need to check them both out.
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Old 08-01-2012, 01:38 AM   #9
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Some other pics:





You also want to check all of the corners for any holes (don't want any of the cold air escaping)

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Old 08-01-2012, 01:39 AM   #10
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Probably also want to peel back the foam tape and look behind it as well as there are corners in which air can pass through. I just taped these up.



Last but not least, do a double check around all of the potential openings.


Took a little bit of time, but not really that difficult and well worth it!
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