Trap line AC Lineset - Problem?

[HamAndEggs]

Any experts here can give me any advice on if this will cause me a problem. With how much space was above the wall and where the lineset needed to go, there was no way I could get it right down and into the hole in the wall to the inside unit. So I had to make this loop. Its a 9000BTU Fujitsu mini split

I assume no issue, but I got reading up on lineset traps and its got me worried



Here is a very rough diagram of the rest

 

[larry4406]

Looks like your lineset loop and condensate pump are in a shelf with some depth.

Any chance you can pull the loop toward you while still staying within the confines of shelf?

No clue if the trap is a concern.

 

[HamAndEggs]

I'm not following what you are meaning, to get it through the hole more?

 

[larry4406]

Pull the loop towards you. Use the front/back depth of the alcove to use up length while pitching to avoid trap.

Again I’ve no clue if a trap is a problem.

 

[HamAndEggs]

Ahh! I see what you mean

Perhaps, maybe I'll mess with it

My gut says what I have going is no problem

 

[nine-14]

I'm watching this thread. I have a similar set up. (no loop, but have the same type of trap. mine is a multi-zone and one zone is the longest and like this!)

 

[HamAndEggs]

I'm watching this thread. I have a similar set up. (no loop, but have the same type of trap. mine is a multi-zone and one zone is the longest and like this!)

How long has it been installed, out of interest?

I've read lots of forums and a lot of people say not to make traps like this, but I don't really understand how it can be an issue, mounting indoor mini splits is almost impossible sometimes without it!

 

[nine-14]

it's not online yet. (all plumbed, but not charged) From what I read, the compressor oil, which is typically suspended in the gas will settle in the trap and cause issues.
I agree with you on sometimes you have to make a trap, especially if the air handler in on an inside wall! Is your system online and cooling the room?

 

[HamAndEggs]

Yes, its been on 24/7 for about a week now, working perfectly and using much less power than I could ever imagined, even compared to my other splits

Everything I've read warns against multiple loops more than anything. I'm going to assume that oil won't get easily trapped for me, but I wanted to be 100%

 

[Highbeam]

Minimum bend radius per the install manual of my Mrcool 24k (Big lines) was just 4". You have plenty of room there to avoid the low point if you want but be careful not to kink it!

I'm just not sure that it's as important to avoid low points as some would have us believe. I went to great efforts to avoid them and probably won't on my next one.

 

[mike93lx]

Many minisplits have excess lineset wrapped into a loop to eat up space, including one I installed years ago. I can't picture why that run would pose a problem.

 

[HamAndEggs]

Yeah, I'm not too worried about it anymore

Mini split has been running 24/7 since 8/7/22, no problems so far!

 

[LS6 Tommy]

Your fine. The indooor unit is above the ouitdoor unit. Oil won't get trapped, even with a loop. If any oil manged to get trapped, as the line diameter decreased from the oil collection, the refrigerant velocity goes up and the oil gets moved back to the outdoor unit

Tommy

 

[HamAndEggs]

Thanks! glad to know its not an issue

 

[fitter30]

Just bend the loops level. There is no problem other than looks to keep loops level. Vertical loops trap oil.

 

[mike93lx]

Just bend the loops level. There is no problem other than looks to keep loops level. Vertical loops trap oil.

How do so many mini split installs not have problems then? And why do manufacturers recommend vertical loops to eat up excessive lineset length?

 

[fitter30]

How do so many mini split installs not have problems then? And why do manufacturers recommend vertical loops to eat up excessive lineset length?

Have never read in a manual that oks the use of vertical loops that i can remember.

 

[mike93lx]

Have never read in a manual that oks the use of vertical loops that i can remember.

I had a freidrich system in my last house that called for storing the lineset between the condensor and wall. Maybe that was an exception

 

[Mzungu]

It's not a problem. Nor is having a couple of vertical loops a problem. They have been installing lots of mini splits in Asia that way since the 70's . Most mini splits in Africa are also sold as kits too with pre-flared tubing hence they have loops too. I have a floor mount unit that I will be installing in a walkout basement, the condenser connections will be at least 12 inches above the indoor unit. The distance between them is also only 3'. I plan on leaving enough coils to get the recommended 10 feet. Coils will be tucked in vertically behind the condenser.