air conditioner - Page 3 - Fiberglass RV


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Old 11-07-2013, 01:37 AM   #29
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Name: Joe
Trailer: 1977 Scamp 13'
Iowa
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Originally Posted by Don Meyer View Post
I bought my Scamp used...1979. The original ref was repaced w/a electic one by a previous owner. Also the 5000 btu a/c exhaust the back of the unit thru a wall mounted vent. The sides are open to the interior.

I am thinking of going to a 8000 btu unit but, the winter prices are a lot higher than summer prices at Walmart. The 8000 btu Frigadare units are around $260. An other option is a used roof unit w/a reinforced roof.

Don
just a thought... Check out Amazon.. You might get lucky. I picked up a new frigidaire 5000 for $45 (or 54) shipped....
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Old 11-19-2013, 11:59 PM   #30
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Name: Mary Ann
Trailer: 1992 Scamp 13' Deluxe
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Originally Posted by Don Meyer View Post
I recently bought a 13' Scamp......it has a 5000 btu window type a/c mounted in the closet. The unit does not seem to cool the Scamp.(that's in the fl heat)

I see a 6000 btu unit is available but, do not want to buy another unit that will not cool.

I am looking for advice.
Don

When I bought my Scamp, it had a window air conditioner in one of the cabinets, only the face is showing with a hole cut into the floor to vent it. They put a fan in the back of the cabinet to try and push the air out. It didn't cool, so I thought I would take it out, and try one from my house. My thought is, it just can't get rid of the heat, so it doesn't cool. I don't know what I have to do to vent it properly, but a larger unit won't work either, I have to try and figure out how to get rid of the heat.
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Old 11-20-2013, 12:21 AM   #31
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Name: deryk
Trailer: 2012 Parkliner 2010 V6 Nissan Frontier 4x4
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Is there a vent on the outside behind the air conditioner?
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Old 11-20-2013, 07:34 AM   #32
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Name: Norm and Ginny
Trailer: Scamp 16
Florida
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Mary Ann,

There needs to be two sets of holes for a closet mounted air conditioner. One to exhaust the hot air and another to bring in cool air that eventually exhausts as hot air. The difference in temperature between these two air flows is what makes the AC unit work.

We have a fan in our closet mounted air conditioner to vent the hot air. It is important that the vented hot air not be sucked back into the cool air hole. In our setup the cool air hole is ducted from the center of the trailer to insure that it's really cool air being pulled into the air conditioner. If this is not clear let me know and I'll provide pictures.

We're in FL and have run our AC more than ever because Ginny had a small medical procedure and I've been keeping it cooler in the trailer. Our 5000 btu unit has worked well.
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Old 11-25-2013, 06:01 AM   #33
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I am still confused......could you please send me pictures of what you did?
I am having trouble figuring out how to duct it.

What part of Fl do you live?........I am near Orlando.

Don
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Old 11-25-2013, 06:31 AM   #34
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Don,
We're in Wauchula, FL at the Escapee Park. I sent Mary Ann pictures of our set up. Send me a PM with your normal email address and I value send you the pictures. We plan to leave FL on Tuesday depending on what the doc says today.
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Old 11-25-2013, 10:22 PM   #35
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PM sent....I hope I did it right.

Don
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Old 11-27-2013, 06:12 AM   #36
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Don, got it. I've been sick and we'll get it over the holiday.
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Old 11-28-2013, 09:19 AM   #37
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Hope you get well soon......Don
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Old 12-07-2013, 03:54 PM   #38
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I tore the frigidare 5,000 btu a/c out so I could post a picture of it. I would like to know what the different vents are for so I know how to duct the air flow.

The front has cold air out at the top & cabin air in at the bottom.

The back has warm air out so it has to be ducted out.

But the side & top...should it take air from the outside or cabin also
where does the water drain from.

Don
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Old 12-07-2013, 07:02 PM   #39
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Name: Randy
Trailer: 1980Trillium 1300
Ontario
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Originally Posted by Don Meyer View Post
I tore the frigidare 5,000 btu a/c out so I could post a picture of it. I would like to know what the different vents are for so I know how to duct the air flow.

The front has cold air out at the top & cabin air in at the bottom.

The back has warm air out so it has to be ducted out.

But the side & top...should it take air from the outside or cabin also
where does the water drain from.

Don
Here is my understanding ab window type A/C: Front Lower is for sucking hot air of inside to blow into its rear(A/C). Front Upper is for blowing cold air out into trailer. Both sides are for sucking cool air from outside into A/C and the rear is solely for blowing out hot air out to outside. This is what I would do this spring for my Trillium1300. Instead of installing A/C at rear window as previously thought, I would put it in cabinet and I think the lower A/C to the floor, the harder to achieve max efficiency. I would separate A/C totally off the cabinet by foil/insulation. Higher off from floor about one foot. Both sides of A/C would have ducts separately going to openings of floor to suck cool air from underneath the trailer. Back of A/C is vented directly to outside with opening like the other side which made for fridge. There must be also opening on the floor to drain water to the ground. When I finish my project I will post and hopefully it will work. Right now it is only a...concept. Lol.
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Old 12-07-2013, 08:33 PM   #40
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Name: Eric
Trailer: Scamp 13
Michigan
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Quote:
Originally Posted by Don Meyer View Post
I tore the frigidare 5,000 btu a/c out so I could post a picture of it. I would like to know what the different vents are for so I know how to duct the air flow.

The front has cold air out at the top & cabin air in at the bottom.

The back has warm air out so it has to be ducted out.

But the side & top...should it take air from the outside or cabin also
where does the water drain from.

Don
I have that exact air conditioner and also use it in a closet.

I agree with Randy's description of the airflow. Lower front is inside air coming into the AC and the cool inside air blows out the top front. The rear is hot exhaust air to the OUTSIDE. The top and sides are cool OUTSIDE air into the air conditioner. Keeping the hot outside air and cool outside air separate is key. You don't want the hot outside air just coming back into the air conditioner because that makes the air conditioner work very hard and hurts the cooling.

So to answer your questions. The side and top should take air from the outside. (If you suck your cool air out of the cabin, outside air is replacing that cool air in the cabin and the AC works really hard - usually unsuccessfully).

The water collects in the bottom of the air conditioner and it helps the air conditioner run more efficiently. In humid weather it will overflow and come out. I actually drilled a hole in the bottom so I could more easily predict where the water would come out.

Feel free to ask more questions.
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Old 12-08-2013, 07:55 AM   #41
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In a car you are recirculating interior air if set that way & it cools better than cooling hotter outside air........to duplicate this in the Scamp it
would seem that you should bring cabin air into the side & top of the a/c unit.

This could be done by putting a vent in the side of the closet next to the a/c unit to pull interior air in thus, recirculating cabin air.

Would this work???

Thanks Don
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Old 12-08-2013, 11:30 AM   #42
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Name: Eric
Trailer: Scamp 13
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Originally Posted by Don Meyer View Post
In a car you are recirculating interior air if set that way & it cools better than cooling hotter outside air........to duplicate this in the Scamp it
would seem that you should bring cabin air into the side & top of the a/c unit.

This could be done by putting a vent in the side of the closet next to the a/c unit to pull interior air in thus, recirculating cabin air.

Would this work???

Thanks Don

Simple answer: No, it would not work and I would not recommend it.

Longer answer: When cars recirculate they take most of the air from the inside, cool it more, and put it back into the cabin. But even in recirculate the hot end of the AC is taking cool OUTSIDE air, transferring heat to it, and keeping it OUTSIDE.

When properly setup your trailer will also work like your car in recirculate mode. The trailer's cool air will come in the bottom front of the AC and exit the top front just like your car takes cabin air, cools it even more, and sends it back into the cabin.

You must have normal temperature OUTSIDE air that comes in the sides and top, gets warmed up and then exhausted out the back of the AC to the OUTSIDE.

If you do what you suggested the AC will work hard and not cool off the trailer. The reason is that the fan will be taking "kind of cool" air from the trailer through the sides and top and to the outside. Air from somewhere will have to replace that air that just left the trailer. Every little leak in your trailer will let in a little air to replace that air. That air is warm so your trailer warms up instead of cools down and you end up with a battle of the AC trying to cool it, but warm air coming in trying to warm it and the whole thing doesn't work well.

Thanks to Frederick Simson for the picture below showing the air flow how it should be.


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