I WANT IT COLD! Charging 410A by superheat and subcooling
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- čas přidán 30. 05. 2024
- In this video I responded to a customer that moved to Central Florida from up north and thought he was having an issue because his system wouldn't cool down to 65 degrees in 95 degree with 100% humidity weather. I show you how to set the charge when it's really cold with low humidity inside the home using superheat and subcooling. #marioncounty #florida #acrepair #410a #superheat #subcool #accompany @VictorofHVAC
Very good video. Thank you.
Your welcome 🤝🏻
Long time no see Victor. Good to see you again man!
Yessir, been building and haven’t had the time to make any videos in a while. I realized that my techs could use these for training so I’ll be making videos and posting them here. Thanks brother, glad to be back
So glad I'm out of the residential field I'd be the one to go back out after someone charged to gas a unit up and I go back to remove a dirty filter or tell them their coil is dirty.
Ooof! I feel your pain buddy. That’s no fun
Hey that Guy looks familiar!
Interesting how MVAC testing is so different. In MVAC, the manifold gauge tells you everything. Superheat and sub cooling isn't calculated. Charts are very common showing operating pressures at different temps and humidity. As well as vent temp.
You will go back .... to adress air flow
No, I wrapped it up. The homeowner had a portable unit sitting in front of the air return causing a really low return air temp. The home was 65 but the return air temp was 57 degrees. Causing a freezing temperature evaporator coil. The filter was clean and the static pressure was .06 😎
Low load ,charge is low as well I would bring sub cooling to specifications if specs are not listed bring sub cooling to 7-10 degrees .
The charge was spot on. It was definitely a low load issue 👍
@@ironshieldheatingair5751 disagree with you charge is low. Superheated is to high at them conditions and subcooling is low . That tells us to little refigerant on low side to little on high side what does that indicate? Sh 20 Sc 3-4 to low .
How cold is he trying to keep the inside? Someone told me that your central unit can only cool 10 to 15 degrees below the outside temp. I dont know how true this holds. I prefer window units i can get my bedroom about 68 degrees on a 100 degree day. But my bedroom is on the north side. He needs a freeze protector stat on the evap coil. Its wired in with the 24 volt contactor in the outdoor unit so if it detects freezeing conditions on the evaporator it will shut off the condensor blower will run till frost melts, and outdoor unit will restart again. I worked on a trane unit that was set up as a low ambient unit to cool a server room, and it had a freeze protect device on the evap coil.
I’m anxious to see the answer to this. Just installed $15k system sep-2023 that can’t cool my house below 82 degrees when it was 98 outside. Feeling pretty scammed.
A freeze stat should be standard on all systems in my opinion. But a properly sized air conditioner with proper ventilation in the attic space where the duct work is located should keep the home 20-25 degrees cooler than the outside temperature. A slightly oversized 2 stage system is the way to go in Florida in my opinion so it can ramp up on the hot days and ramp down on the mild days 👍
I’m in mesa az. When it’s 115f out I can keep it 72f if I want to watch that power meter spin. I also have 8 tons of cooling on a 2800 sq ft home.
Man You Ain’t Lying About Them Window Units Especially If you Close The Door To That Room 🙌🏾
@@ericnewton5720that’s 100% on how the install was performed. Something’s definitely going on because I’m a hvac tech myself and I have a 20 year old r-22 system that works perfect on 95 degree days . Something’s going on there w
That is a little low as well. Txv? You’re lsat is like 3 degrees above outdoor. Should be 15 minimum 8 degrees subcool. You’re VSAT will go up and low side. The indoor temp of 78 will not effect that maybe 65-68 degrees indoor would
Txv indoor and the charge was spot on per charging table. Every system has a different subcool and superheat target. The indoor temp was 67 degrees and the return air temp was even colder due to a portable unit installed next to the return air. The homeowner wanted it cold. I see you didn’t watch the whole video based off of your comment 👍
looks like an airflow issue possible low heat load, you will be returning to address ice up coil good luck
Did you measure indoor airflow with a manometer? Kind of looked like low indoor airflow to me.
Just what I was thinking.
The issue ended up being that he had a portable unit sitting in front of the air return so the return air temp was 57 degrees 😂. The guy was from Wisconsin and wanted it freezing cold in the home. I like my house cold but this guy was on a different level. The air flow was spot on. The static pressure across .06
@@ironshieldheatingair5751 I have never seen or ever heard of static pressure reading of .06 in my entire career. That is basically no static pressure at all. .6 I can buy and see all the time, but .1 or .2 is hard enough to achieve with the newest systems. The rest of the video I am onboard with. In Colorado, everything is de-rated, so we have to adjust charges differently. But that SP is hard to believe.
@@Balticblue93 nice catch! 😂 I meant to put .6 🙌🏼
@@Balticblue93 I’ll be in Colorado next summer. Looking forward to it.