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Does a Wall Mounted MINISPLIT Need a CONDENSATE TRAP? Ductless vs Ducted Air Handlers!
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- เผยแพร่เมื่อ 14 ส.ค. 2024
- In this HVAC Training Video, I Compare a Ductless Wall Hung Minisplit to a Ducted Air Handler to Explain if a Ductless Unit needs a Condensate Trap in order to Drain the Water Out! Supervision is needed by a licensed HVACR Tech while performing tasks as Experience and Apprenticeship garners Wisdom and Safety.
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Information in this video is intended for educational purposes only. Any work related to the topics in this video should be performed by licensed technicians or by apprentices under the supervision of licensed technicians. AC Service Tech LLC is not responsible for any possible damages or injuries caused by the use or misuse of any information provided.
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If you accidently trap the condensate on a mini-split system the water will run down the wall the indoor unit is mounted to. I've seen this many many times when someone runs a vinyl tube and puts the hangers to far apart on a pitched horizontal run. Better of using pvc for any horizontal runs
@5:10 I’ve had a few calls where the indoor unit is leaking water and found the drain pigtailed outside. Just straightened it and the whole drain line and pan cleared right out.
It’s important to remember when installing a mini-split that the drain has a downward slope and not travelling uphill. It gets overlooked more than you’d think.
I know this is an old video, but thanks for the clear explanation. I installed a mini split this week and I was wondering about this.
You are the Rainman of HVAC. Thanks for another great video.
Another good one...I've never installed a mini and now if I do, I know, not to trap the drain line...Thanks for sharing the experience...I have learned again.
Even when I already know the answer I love watching your video. You explain it so well and I end up describing concepts like this similarly to other techs or customers.
This was a great video explaining a basic thing that many newbies did not understand. Thank you
I am licensed hvac contractor. Love your videos. Thank you!
Really enjoy your video and find them very helpful to all the techs that have been in the field for some time! Sort of a refresher! Keep doing what you are doing. We appreciate you!! Old Marine.
One of the best channels on TH-cam
Love your vids man. Thanks!
Thanks for sharing the information !
Positive pressure - no ptrap.
Negative pressure such as air handlers - ptrap
Any water draining into a drain that could emit a bad smell - ptrap
I remember this in technical school. I hope Craig makes a video with some examples of the different types of pressures and system designs. Thanks for mentioning this..
@@stan-r a positive pressure system is where a blower PUSHES air past a coil and drain pan.
A negative pressure system is when a blower is SUCKING air past a coil and drain pan.
If a negative pressure system does not have a ptrap, it will also suck air up from the drain (like a vacuum) making water unable to go down drain.. In this case, water will build up and overflow over the drain pan until blower is de-energized and then all the water will then rush down the drain since the vacuum is now gone. In this case a P trap is required so the water in the Ptrap stops the blower from sucking air up from the drain.
Hope this helped
@@jessestewart3835 Thank you so much for the detailed explanation. This is extraordinarily helpful!
@@stan-r you’re welcome. Also keep in mind that you can only have one ptrap. Double ptraps will also cause water to not drain.
Also very important to size the trap correctly in line with the static pressure the unit is creating. A lot of larger AHUs suck the water seal clean out as the heights are not sufficient, sometimes the drop to the trap is too short other times the water seal hight is too short. Also good practice on longer drain lines to add a vent after the trap to eliminate any airlocks that can occur
If only inspectors in S. Florida agreed. They require a trap mostly for an insect/pest barrier. I had one in Coral Springs that wanted a check valve and a trap on each line to pass inspection. Of course we removed the check valve after passing the mechanical final.
I came here to say that same thing, I’m a contractor down here in broward abs an inspector wanted a trap on 7 minis I installed.
Thanks again for the videos!
🍺🍺🍺🥃🥃⛳🎳
Stay safe.
Retired (werk'n)keyboard super tech. Wear your safety glasses!
Great explaining and proving why or why not to use a trap. Thanks!
Thank you for watching and enjoying our content!
Complete and detailed information as usual. Much thanks.
Thanks for the video. Very informative!
When in doubt read through the installation manual. That information is in there it was for mine.
@ Ja Kurt. My immediate reaction may be quite unscientific but if the equipment manufacturer does not advise to install something additional, do not. In fact the equipment manual warns the user that modifications will void the warranty.
A confusing example as usually the blower is upstream of the coil not downstream with a furnace so the pressure at condensate drain is positive.
Great tips . Thanks Craig.
Awsome explanations
Hello, could you please explain in one of the next videos how to use that velometer to determine bad airflow from the vent? Always was interested. I think that topic is not very answered.
Did not know that. Good info! THANK YOU
Your videos are always helpful,i was wondering if you can make some videos on water cooled equipment,cooling towers and piping.
I'd like to see this comparison done on 90+ Efficiency Furnaces on their condensate drains.
Question….. On my mini-split heat pump, there is a vertical condensate pvc pipe that runs directly outside. My concern is preventing spiders and other crawling bugs from making their way into the house through the pipe. Any idea how to prevent it? Thank you.
What about a slim ducted mini split system like the Fujitsu ARU18RGLX? This is not the wall mounted units. The installation instructions state it is prohibited to add a trap, rise or air bleeding when naturally (gravity) drained.
thank you for the great video. quick question, how about a mini split ducted unit? does that need a trap?
It depends, if the drain outlet is on the positive side of the unit then no. But if it is on the negative side then yes
Another great video
At the end of the ductless condensate line, flex tube I would do a N bend trap so bugs dont go into drain line. This would be any run over 6 foot, I have never had a problem
Is the condensate from a mini split acidic? or can it just drain onto the ground? (and eventually evaporate)
Thank you for the info
Great information.
Partially false in some areas. Water traps aren't needed, but BUG traps are required like that check valve. Our area gets tons of gnats, millions of grasshoppers/locust swarms and wasps every year. Frustrating to search for answers as they all say 'no', yet when we did a full EVAP cleanout, there was a whole array of dead bug carcasses in the drain pain of the indoor unit. Basic biology that living things look for moisture/water.
Thanks for the video =)
What if someone has their air handler in an attic and they are using the secondary condensate drain line as well ( that would never be used unless the main line is plugged), water would dry up in there relatively fast ?
Bosch preasure washer is too powerful to wash AC ...can u suggest a preasure washer with regulator?
Nice
It would have been better to place the anemometer closest to the equipment drainage outlet
Is it true that if the blower motor is below the condensate pan it creates a positive pressure condition making a trap on condensate line unnecessary?
I would think the air flow over the small drain opening would create a suction.
Yes as long as the situation you mention is an upflow.
Forget the location of the blower what is important is the location of the coil relative to the blower. If the coil is downstream the blower you have a blow through configuration and the drain pan will have positive pressure. You should still trap keep air leaks to minimum.
But what about sewer gas???
👍
Positive pressure=no trap Negative pressure=trap needed
If you trap minisplit wall mounts they won't drain.
My God what dumb dumb would ask if a mini split needs a P trap? The only time you need a P trap is when the drain system is in the negative pressure section of the cabinet.