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Old 08-19-2017, 02:10 PM   #1
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Pan or no pan

I am trying to replace my old duo-therm a/c with a new 13,500 coleman unit.
I managed to remove the old a/c but there is still a pan stuck to the roof that has a 14" square hole and a condensate tray that is piped to under the trailer.
The tray is one piece and part of the pan.
If I remove the pan the tray will go with it.
My question is what do I do about the condensate,where will it go?
Nowhere in the installation instructions is there any reference to the condensation. In fact I couldn'even find reference to it in the installation manual for the unit I'.m removing.

Somebody please help !
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Old 08-19-2017, 02:39 PM   #2
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All air conditioners produce condensation, unless you find somewhere on earth that has 0% relative humidity (even the Sahara has some humidity in the air). So you do need a tray to catch condensation, and a drain line to safely channel it away.

Two questions present themselves:
1 - does the new Coleman unit come with a condensate tray to replace the one that's already there on your trailer?
2 - does the Coleman unit fit the tray that's already there?

If the answer to (2) is "Yes" then leave it in place and install the new unit.

If the answer to (2) is "No" and the answer to (1) is "Yes" then remove the old tray, install the new one, and reconnect the drain line to the new tray.

If the answer to both questions is "No" then you'll need to purchase or fabricate a new condensate tray.
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Old 08-19-2017, 05:30 PM   #3
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The new ac may be designed for the condensate to drain onto the roof by default. I think I just read somewhere that someone put domestic drain cups on a Coleman.

Found it.
http://www.airforums.com/forums/f44/...ml#post1994718

You may want to pm (private message)them.
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Old 08-19-2017, 06:14 PM   #4
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Rivet Possibly No Pan, Depending on Which Coleman

The Coleman Mach 8 low profile is available with a condensate pump to send the water down the existing drain hose.

You need to be aware that not all Mach 8 units come with the pump. (Ask me how I know. ) They all have a fiberglass bottom pan that is the actual bottom of the unit. The ones without the pump have a couple of small holes drilled in the bottom to allow the condensate to drain onto the roof. These can easily be plugged with sealer if you are adding the pump.

Of course, it would (theoretically) be easier to get one with the pump already installed in the first place. If you're buying online, ask...ask again. The condensate pumps remain a mystery to some online sellers. Even ones who are extremely helpful dealing with it later.

That said, I installed a Mach 8 15,000 Heat Pump on my 34. I couldn't be happier. (After adding the pump.)

I don't know about other Coleman models.
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Old 08-19-2017, 09:17 PM   #5
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I have a Coleman Mach 8 cub. It did not come with the pump, and is designed to drain on to the roof. Some of the larger units do come with one. If yours has one, there will be a pretty obvious nylon tube in the return air to hook up to the drain line.

Because mine didn't come with a pump, I ordered it separately and installed it myself. No big deal, just a couple of screws and wires with spade connectors. You have to seal two drain holes when you install it. The pump turns on whenever the compressor runs.

Remove the old pan. Get some 1-1/2" aluminum angle, channel, or square tube to frame out the 14" opening so the Coleman mounting bracket has something to grab onto. Buck rivets into the screw holes from the old air conditioner, use some sealant in each rivet hole to be sure they seal tight. If yours doesn't have the pump kit, buy one separately and install it.

I have lots of pictures of what I did on the blog.
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Old 08-19-2017, 11:15 PM   #6
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Thanks to the Greatleys

Quote:
Originally Posted by TheGreatleys View Post
...

Because mine didn't come with a pump, I ordered it separately and installed it myself. No big deal, just a couple of screws and wires with spade connectors. You have to seal two drain holes when you install it. The pump turns on whenever the compressor runs.

...

I have lots of pictures of what I did on the blog.
I referred to the Greatleys' blog many times while I was searching for the pump. Detailed photos showing everything, including sealing the holes I referred to in my previous post.

Their page of links has one to a source for the Condensate Pump. I found it to be the best price and the correct pump to fit my 15,000 heat pump as well as their Cub. The dealer I got my unit from tried to help, but the pump I got from them would not fit the Mach 8.

I wanted to thank them for their help in my AC upgrade
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Old 08-20-2017, 06:17 AM   #7
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Quote:
Originally Posted by vswingfield View Post
I wanted to thank them for their help in my AC upgrade
You're welcome! I couldn't find pictures when I was shopping for the unit, so I figured I should make some available for others. Glad to hear it's helping.
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Old 08-20-2017, 08:20 AM   #8
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Of course if your trailer did not have A/C or drain lines then just let the water run off the roof like millions of other trailers.
I know, I know ... How uncouth .
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Old 08-20-2017, 08:35 AM   #9
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My motorhome AC's drained onto the roof and it ran to the lowest corner and dripped off.
I guess Airstream didn't want streaks on the curved aluminum.
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Old 08-20-2017, 08:54 AM   #10
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Quote:
Originally Posted by Mollysdad View Post
I guess Airstream didn't want streaks on the curved aluminum.
Yes they are are very couth conscious at Airstream
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