What causes formicary corrosion
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- Опубликовано: 29 сен 2024
- Formicary corrosion is not caused by chemicals in your air. In this video I explain what I believe is the cause and how you can fix it. Links below to my leak playlist, Carrier paper, and papers on flow electrification.
Carrier paper: aplusair.ca/wp...
Leak playlist: • Leaking Coils
Link to letter to our customers written in 2011: docs.google.co...
Letter about flow electrification: docs.google.co...
Flow Electrification papers:
www.aidic.it/c...
ijpest.secures...
papers.ssrn.co...
Really enjoying the videos. I've been looking for some information about how to pick a reliable system that will avoid issues like leaks. Do you have any suggestions about how to go about getting a replacement system. I have old ducts and a 30 year old Trane that is about dead due to leaks. So far I've gotten all aluminum evap and get a load calc as part of the install. Would love some more info. Location is gulf south. Thanks!
You have special needs that we don't have here in California, humidity. Humidity plays such an important role in large sections of the country. In your case you need a system that can provide the cooling while dehumidifying. We slow down the fan speed from 400 cfm per ton to usually 350 cfm or 325 cfm to remove more moisture from latent cooling (wet bulb). In California we actually bump up the fan speed to 450 cfm or better because of our dry climate to get more sensible cooling (dry bulb) for higher efficiencies.
In your case sizing takes on an important role, thus the load calculation, because an oversized unit will cycle on and off too quickly to remove humidity properly. Going with a variable speed can help but setting them up can be problematic to keep the humidity down and keep you cool.
Some people install a separate dehumidifier that works independently or in conjunction with your A/C. Trane makes such a product, Integrated dehumidification Solution IDS. You could also have a reheat coil installed on the system that allows for the system to dehumidify and not overcool the air. Trane used to build a system like that but I never had to use it because of our low humidity in California.
You should look for a contractor in the area that has been around for a while and will actually do a load calculation on the home, then ask how they handle humidity issues with the systems that they sell.
Im a service tech working in South Florida and have an office building with LG vrf systems. We typically lose two or three evaporator coils per year ever since the building opened. We changed out half of the building to Daikin vrv and still have the same issue even with coated coils. We've had third-party testing done, and the manufacturer has been out also, but no one can give us a straight answer of what exactly is causing. I worked in buildings with Chinese drywall that has high sulfur, but that's not the case here (the copper is not black).
I am telling you its flow electrification making a corrosion that would occur naturally over time happen much faster.
Some university student looking for their masters should take this up, hell they might win a Nobel prize.
Excellent content. What are your thoughts on large commercial air handlers using chilled water? Have you seen any corrosion similarities?
Sorry, don't work on chilled water systems. However, I know a couple of people that do and I will ask them. However, I don't think this is an issue with chilled water systems as they are usually nickel plated to prevent such corrosion.
Excellent video. Hard to believe no one at the university level will take this up.
I’m not surprised at all. Nothing in it for them to go against Carrier’s study that said it is the customer’s fault……and potentially opens them up to a lawsuit.
There lies the conundrum, if they actually say what it is, are they liable because they knew all along?
I've had 2 coils gone in my Fujitsu. First one 5 yrs, second one 2 years. If it goes again I'm back to wood.
Sorry you have had such bad luck. Unfortunately, mini splits use only copper aluminum. We too have had to change many coils out for mini splits. This is one reason I don't recommend them to my customers and instead go with central heating and air.
Thanks for the comment.
@@baileysair I also had the air coil go on my ground floor pump from a bad soldering job. All are ducted in , no mini splits. I've paid out over $3k the last couple years plus $800 in increased hydro because the leak. I could have bought fire wood and heated for 3 yrs on that. They painted the coil on the Fujitsu with a corrosion inhibitor. If it goes again I'm done with it.
@@edwardthompson9981 On a few of the mini split coils we have replaced we were able to get a coated coil from the manufacturer and they all worked out and are so far leak free. So, good luck.
Is there any connection to when the white armor flex linesets came out to when all the leaking coils started happening? We had all kinds of problems with the white armor flex. I was thinking that some kind of reaction was happening to the copper coming from the white armor flex because you would see the copper refrigerant lines get holes from the outside in also not just the coils
We have been using the easy pull linesets for quite awhile now and none have popped up with corrosion. In your case it might be the environment you are in with lots of excessive moisture coupled with, as I stated in the video, some type of electrolysis going on. If you switch over to another brand of insulation do they get the same corrosion?
On my personal coils and my families coils I epoxy coat them three coats. I offered to my customers, but of course I had a fee we quit substantial one..
Great tip! Did you measure the capacity after coating? I wonder if it reduced it by much.