too much air

[dino1]

Have a 5 ton unit in a moblie home. At first the cap. went bad. After replacement unit started freezing up. Pulled vac. and pulled inside unit out(cond.-fan) and cleaned. Cleaned outside coils. Unit runs better than ever. But it still is freezing-up. Having to cover half of unit outside with pastic to keep from freezing-up. Any ideas of what has happened?

[cuchulain]

A couple of things will cause a unit to freeze up the most common are lack of refrigerant, lack of air flow across the evaporator. make sure these are correct, via proper charging methods and airflow measurements.

[Shophound]

You did not say which cap you replaced.

[dino1]

Outside cap. was swollen and checked bad.

[dino1]

Would it be wise to put a valve inline for flow?

[wahoo]

Not a DIY site. You need to join the pro section and ask. Frankly I've never seen a mobile home with a 5 ton AC unit but there is always a first!!

[SkyHeating]

Not a DIY site. You need to join the pro section and ask. Frankly I've never seen a mobile home with a 5 ton AC unit but there is always a first!!

Sounds like an oversized unit from a contractor who doesn't know how to size or a homeowner who purchased their equipment online without a warranty and tried to Do It Themselves.

Have a professional come to your house and work on the unit, the money you pay for this will easily be saved in trying to work on it yourself and all the hassles that come with it.

[jkv]

A 5 ton unit is to large for a moble home, if it is single it only has mabe 920 sf. you are moving too much air over the evaperator and not removing enough humitiy out of your air. I would not think that the cap would be the problem as much as overcharged.
how much super heat and sub cooling do you have?

[wahoo]

jkv.....too much air??? I've also NEVER seen a 5 ton blower in a mobile home. Sounds like the HO has a LOT of problems!!! Your answer of "too much air" can't be even close to the mark. Largest blower I've ever seen is 4 ton, and if someone put a 5 ton on this system it would probably do just what it's doing.....duh??? Sorry for hard time, but if you're gonna post something just try and make sense when you do.

[RoBoTeq]

Mobile homes always need to be grossly oversized due to the heat gain factor. They also always have high static air issues. Having the indoor blower motor replaced with the next larger HP motor (along with proper capacitor) will help overcome SP and increase air volume.

If you are a professional in the HVAC field, get your post count up to 15 posts and apply for professional membership.

[dino1]

Thanks RoBo, sounds like the best idea so far. This is not the original unit to the home. when I bought it the owner had replaced the unit someone has given to her. So I'm not sure if it is over sized or not? The tech that came out suggested more air flow, return? Or maybe a valve inline, for control? For now am wrapping pastic around half of outside unit, to keep from freezing.

[RoBoTeq]

Most mobile home returns are also undersized.

[biggi]

5 ton units on mobile homes down here is very common. my home is 2500 square feet and i have a 5 ton system "package" on my mine. however with any unit many things can cause a freeze up. call a pro have them check it out.

[dan sw fl]

5 ton units on mobile homes down here is very common. my home is 2500 square feet and i have a 5 ton system "package" on my mine. however with any unit many things can cause a freeze up. call a pro have them check it out.

http://homebuying.about.com/cs/modul...dularhomes.htm

TERMS here are significant.

It appears that you have a modular home.

[rickboggs]

Thanks Dan,
I always thought modular was a nice word for mobile

[biggi]

we call them mobile homes here no matter. no body really cares either way. if they are on blocks it's a trailer. mine is a triple wide "mobile home". however nicer then most. 10 foot ceilings huge living spaces. but no matter. it's still a trailer. LOL.