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Old 07-17-2013, 07:38 PM   #1
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A couple of questions?

This year we decided to set our Sunny up on a seasonal site. Well, summer has finally come to Central Ohio and as usual the heat and humidity are extremely high. As you can guess, it gets really hot in the camper during the day when no one is there. When entering this afternoon the thermometer showed a blazing 104 degrees in the camper.

I noticed the fan that cools the electrical panel was running and continued to run for the entire time I was there...It was actually still running when I left. I have noticed this fan running on occasion in the past but generally for a few minutes and then shuts back off. Is this fan runing for extended periods of time normal in the heat of summer or something I should be concerned about?

I cracked the roof vents and a side window hoping to keep the temperature down a little but I am sure it will not be enough to keep this fan from running.

Another question my wife had was regarding canned goods...Does the extreme heat in an enclosed camper have any negative effect on the canned foods stored in the camper? I told her I did not think so...But I am the husband so I am never right

Anyone know? Will it hurt the canned foods to be in the camper during the summer?

One last question After the camper has sat in the heat I noticed the AC drips from the filter vents when it is running. It only does this for a little while and then quits. I have been careful not to let the watrer drops lay on the floor but I was wondering if this is normal? I suspect it is simply all the parts cooling off and water is condensing as this happens but I wanted to make sure.

Thanks everyone...this site is an absolute great place when us newbies have questions.
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Old 07-17-2013, 10:00 PM   #2
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Mike,
As far as the canned foods go, they should be okay as long as the cans aren't bulging, punctured, or rusted.

Rose,
Husbands are allowed to be right at least once a month.

Sorry I can't help you with the other questions.
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Old 07-17-2013, 10:05 PM   #3
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Quote:
Originally Posted by mike71654 View Post
I noticed the fan that cools the electrical panel was running and continued to run for the entire time I was there...It was actually still running when I left. I have noticed this fan running on occasion in the past but generally for a few minutes and then shuts back off. Is this fan runing for extended periods of time normal in the heat of summer or something I should be concerned about?
I can't imagine it's a good thing, but I'm not sure of the limits.

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I cracked the roof vents and a side window hoping to keep the temperature down a little but I am sure it will not be enough to keep this fan from running.
Good call. You might want to look into getting some MaxxAir covers so that you can leave your vents open all the time.

Quote:
Originally Posted by mike71654 View Post
One last question After the camper has sat in the heat I noticed the AC drips from the filter vents when it is running. It only does this for a little while and then quits. I have been careful not to let the watrer drops lay on the floor but I was wondering if this is normal? I suspect it is simply all the parts cooling off and water is condensing as this happens but I wanted to make sure.
I think I've seen this happen before, but it's rare. As long as it isn't streaming out, because that could do some damage in the ceiling. A little condensation forming around the vents shouldn't cause much harm though.
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Old 07-17-2013, 10:22 PM   #4
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I think I've seen this happen before, but it's rare. As long as it isn't streaming out, because that could do some damage in the ceiling. A little condensation forming around the vents shouldn't cause much harm though.
Well...maybe so, maybe no. There are two potential causes for this.

1. You simply have extremely humid air inside the trailer when you turn on the A/C. The moisture in the interior then condenses (i.e., 'falls out') of the surrounding air as the discharge air cools. Because the discharge air of course leaves the vents first before it circulates to the interior of the RV, and because the vents themselves are steel and cannot absorb moisture, the water in the air collects around their cooler surface and then drips off. This is probably what's going on, as you stated that this takes place after the trailer has sat for a while with no climate control engaged.

2. You are experiencing what's known as 'carry over.' This condition is an indication of a problem with the condensate (water) drain system. Carry over happens when the piping or tubing which allows condensate to flow away from the cooling coil becomes blocked, usually by mold, dirt, etc. The moisture then collects in the drip pan that is beneath the cooling coil to the point that it is easily blown into the cold air stream by the indoor fan. Carry over needs to be addressed right away. I'm not sure how the removal of condensate is accomplished in these RV A/C units, as I've not yet read through our Dometic manual (shame on me, I know). However, it doesn't sound like this is what's happening in your trailer, because if it were, you'd notice it all the time, not simply on startup. Carry over is frequently accompanied by a moldy smell, so if you're not noticing this, you're probably O.K.

Matthew
(Twelve years in HVAC service prior to change of career...)
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Old 07-17-2013, 10:34 PM   #5
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There may be a small leak between AC unit and roof gasket.The gasket can become compressed and loosen after awhile. Make sure your condensate is running off.
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Old 07-18-2013, 06:55 AM   #6
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Is there anyway you can leave your vents open - we have MaxxAir covers on or TH and leave the vents wide open all summer long. Do you go to the TT daily? Can you leave a fan running to circulate the air?

We leave canned good in the TH all the time and never had a problem - but as stated, buldged cans are not good!
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Old 07-18-2013, 10:51 AM   #7
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Quote:
Originally Posted by Wannabes View Post
Well...maybe so, maybe no. There are two potential causes for this.

1. You simply have extremely humid air inside the trailer when you turn on the A/C. The moisture in the interior then condenses (i.e., 'falls out') of the surrounding air as the discharge air cools. Because the discharge air of course leaves the vents first before it circulates to the interior of the RV, and because the vents themselves are steel and cannot absorb moisture, the water in the air collects around their cooler surface and then drips off. This is probably what's going on, as you stated that this takes place after the trailer has sat for a while with no climate control engaged.

2. You are experiencing what's known as 'carry over.' This condition is an indication of a problem with the condensate (water) drain system. Carry over happens when the piping or tubing which allows condensate to flow away from the cooling coil becomes blocked, usually by mold, dirt, etc. The moisture then collects in the drip pan that is beneath the cooling coil to the point that it is easily blown into the cold air stream by the indoor fan. Carry over needs to be addressed right away. I'm not sure how the removal of condensate is accomplished in these RV A/C units, as I've not yet read through our Dometic manual (shame on me, I know). However, it doesn't sound like this is what's happening in your trailer, because if it were, you'd notice it all the time, not simply on startup. Carry over is frequently accompanied by a moldy smell, so if you're not noticing this, you're probably O.K.

Matthew
(Twelve years in HVAC service prior to change of career...)
Hmm, good information Matthew. Thanks for sharing!
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Old 07-19-2013, 08:48 AM   #8
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Thanks for all the responses..It was nice letting my wife know I was right about the canned foods.

I did not want to risk and damage so I had a service guy come out and look at the electrical panel and AC unit. As suspected the AC was simply condensation from the extreme amount of humidity in the air. With the lines and even the plastic experiencing the sharp change in temperature and humidity when turned on it creates condensation. I opened the top vents in the camper and turned on a fan...Just those simple acitions stopped this from occuring when I turn on the AC now.

As for the electrical panel...Well everyting is ok...thankfully! As with the AC is was just so hot in there the cooling fan was running.
Again...the solution was to open the roof vents and turn on a fan. All is well now...The cooling fan comes on and shuts off as it should now.
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Old 07-19-2013, 11:01 AM   #9
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Glad to hear all is well!
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Old 07-19-2013, 02:30 PM   #10
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Glad to hear all is well!
x2! We have had some crazy humidity around here lately, so I guess I'm not too surprised.
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Old 07-20-2013, 07:09 AM   #11
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The fan in the converter is temp sensitive so if it's really hot it is going to run. If there is any load on it (lights etc.) it will be even more likely for it to run. My house A/C collects water in high humidity on the vents where the cold air blows through the due point this morning was 76* just slightly lower then the outside temp! I have a Fantastic Fan vent that has a thermostat and a rain sensor the thermostat is a really great feature the rain sensor not so much but it does work just cycles too much in light rain the "fix" of course is a vent cover.
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