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valcarmo72 07-14-2013 09:57 PM

air handler change out...issues..
Changed out my airhandler today.
Ran all R22 back up to the compressor.
Ripped out old unit. Very very little air in the lines.
Connected new unit. Shot nitrogeb charged to 100 psi in lineset and a coil and it held for 1 hour.
Vac the lineset and coil down to 300 microns and let stand for 2 hours.
Let the r22 back into the entire system .and. gauges read over charged. DID NOT BLEED off excess yet. Supposed to be 150 on both high and low side. Was reading 165 on both end.
Have ran the unit works great but not that cold. 68 degrees coldest reading at register.
Can it be that the overcharge is making the unit run hotter than normal?

gregzoll 07-14-2013 10:01 PM

You do have a EPA permit for handling R-22, I hope. As for overcharging, it will not necessarily make the unit run hotter, but it can cause the unit to fail, or not run at all, if there is a sensor in the unit to sense under or over pressure. Also over charging, can cause it not to cool at all.

The unit should have come with a chart in the book, that states what the charge needs to be.

valcarmo72 07-14-2013 10:15 PM

My cousin helped me with the gases. He has an EPA card and I just folllowed his lead. So what u are saying is the airhanlder will a chart for charge? The compressor says 150 high and low. I have goodman model aept03000c 2.5 airhanlder. It really didn't say anything about the charge. I thought the charge set to the compresor specs only. Please be patient as I do lack the knowledge of the hvac jargon..and I am not a pro but have researched a lot. Just trying to narrow down to the cause. Other than that he came back 8 hours after it was fired up and the gauges read the same as the first time we started her up. I apprciate the help.

gregzoll 07-14-2013 10:25 PM

Wait til one of the hvac techs come along to give you specifics on the charge for high & low, etc.. As for your cousin, he should know how to charge it, if he did the work. Otherwise if you did it, with his equipment, and anything happened to the equipment if brandnew, good luck with trying to get Goodman to support the warranty.

Need the model# of the outdoor unit, not the indoor. Just giving the info on that air handle, only will state what you have inside, not outside.

valcarmo72 07-14-2013 10:49 PM

Have to get the model number outside. He read the specs and just left it overcharged. He said we should leave it alone for a few days. He did the work. I don't know how the heck those gauge work. They confuse me. LOL. Thanks for the help though. The handler is working great. I did set the dipswitches and wired it though. Really easy..thx again for the help. I don't think its damaged because it cools. But just might need to be fine tuned. I would like it colder. If its possible. I would assume why leave an overcharge. Charging it to specs is the way to go. That's my opinion but he insisted as he said he knows what he's talking about. I'm no hvac tech but I sure as hell can read specs. Specs on my mind are made to be followed. But some people think they know everything. Am I right?

valcarmo72 07-14-2013 10:55 PM

Oh I forgot ...the conpressor sweats a whole lot and leave water and the compressor is louder than the other one right next to it. I have another unit for the second floor that doesn't sweat and is quiet. Isn't that a sign of overcharge?

gregzoll 07-14-2013 10:57 PM

Leave it alone with it being overcharged, time to find a different hvac person. The system is not going to mysteriously lose the overcharge, or compensate for it. There is a reason why the install manual has those tables in there.

As for the noise & water, could just be a sign of a unit with higher noise level, than the other, and that it is pulling more moisture out of the air on that floor. Not necessarily due to overcharge, just that it is doing its job. But yes if you leave it with the overcharge too long, it can ruin the compressor.

My 13 SEER Armstrong Air unit I got in 2010 runs at around no higher than 38db, compared the 10 SEER unit that my next door neighbor has, that runs around 50db, when we checked it with a sound meter.

valcarmo72 07-14-2013 11:06 PM

Definatley going to call someone else to fine tune it. Thanks for the help. Much appreciated.

valcarmo72 07-15-2013 03:09 PM

Goodman gsc130241ae is the model number of the unit outside.

gregzoll 07-15-2013 03:26 PM

Here is the install manual and info on it See page 7 regarding Superheat info. See Pages 4 - 17

valcarmo72 07-15-2013 08:49 PM

Thank you very very much. Tried reading this already and became very confused. Going to print it out and figure it out. Thanks a bunch.

beenthere 07-15-2013 09:48 PM

You can not tell if a system is over charged by the gauge reading when the outdoor unit is not running.

Did you put an R22 TXV in the new air handler, or are you using the factory R410A TXV the air handler came with. Won't work to well then.

gregzoll 07-15-2013 09:51 PM

I tried reading it also. A lot of info on those charts in the second link. Pages 6 & 7 are the two that pertain to your unit. It is stating 76db's for that unit. Yep, that is loud. Too loud for me personally. That is why I like our Armstrong air, at its low db rating.

valcarmo72 07-15-2013 10:03 PM

Yes it does have an r22 txv. For sure because the airhandler manual clearly states it is for r22 only. The upgraded model starts with aruf. They discontinued that model. The unit I bought is from 2006 and it works awesome. He came back today and I showed him this chart. I emailed it him and he said he would ask at work for someone to help him get the specs right. He also measured my lineset and size coil. He said he has to take that into account. He said something about recovering all the gas again. Vac it back down and starting from scratch with the gases. I told him that would be fine. I also mentioned to him that if he pumped it all into the compressor that it could be to.much or too little considering the new coil is double the old one. Not sure if that makes sense but I am going to check out the paper work u sent me. Thx again.

beenthere 07-15-2013 10:07 PM

Even after he weighs the charge in, he is suppose to check it by SC and SH.

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