Carrier RTU fixed metering device to TXV conversion
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- čas přidán 29. 08. 2024
- It's been a while since I did a conversion from the "Manifold header" multiple piston metering devices to a Thermal Expansion Valve feeder setup.
I used to do this a lot on Carrier and Trane RTU's. They operate better than original setup in these cases.
My heart goes out to you working in that 110+*F heat. And then on a roof....wow. And here I thought Texas HVAC work was tough!
Great work! I would have condemned that unit all day long. Hats off to you
Great video. Thank you! I am headed to do the same on 4 years old 10 ton RTU tomorrow. These damn header assembly is on back order and estimated time is 2 months… It’s end of March in Memphis now. So, usual temperature at the end of May is 90-95F here….
Great job!
I've been told by some techs that this kind of repair is not possible.
George Ballard How is it NOT possible? LOL
I've done this a few dozen times but it had been a while.
Lookin a little hot out there. Awesome work. Triple digit OG!
This video saved my life today tyty 🙏🏽🙏🏽🙏🏽🙏🏽🙏🏽
Good video fixing to do one here in two three weeks
Good vid ! bummer about the missed video part. the same happened to me the other day. best part of video never recorded or something.
Nice job! I haven't seen this one on video before. Keep passing on the knowledge.
Matthew Maslak I might have some really old video of this mod but maybe not from start to finish like this.
I've done this several times to Trane Voyager and Precedent units.
They are coming from the factory now with TXVs the last few I installed had them.
That looked like a lot of work
zack9912000 It is. But not too bad.
That's really awesome!
wow, that repair must have cost a fortune. pretty intense
2020tesla I've done it a bunch of times but not in a while.
The OEM part, which Carrier distributor doesn't even stock, costs more than a TXV and the small copper tubing.
It is also almost impossible to un-sweat the copper out of each bell end at the coil without at least one tearing apart or breaking clean off right down to the galvanized plate.
That is why even the Carrier distributor reps will be like "Sure you don't want to just order an entire new coil"?
The mod to a TXV is not just a repair it is also an improvement over the original design. Which sucks.
Nice work buddy.
Bang up job! Hand fab.ed distributor? great handiwork!
Good job bro but i must say you need a set of sporlan guages. No hoses and wires through doors. Its perfect for commercial units and refrigeration.
ben kubesh There is a hole on top with a plug that you can remove to drop the hoses through but it's just easier to run them out the bottom and hold the panel over the opening.
I see lots of guys running the new electronic ones but they look too delicate to survive my use.
Great video.
good job
Nice job hackfreehvac
***** Thanks
Tazzman228
Thanks man
***** Most of the day but I don't rush it.
No weighing in the charge? Does the txv conversion basically change what was on the data plate for factory charge?
Absolutely. Different orifice type
Great job. I hope you were able to rig some shade while reworking that coil -- the sun must've been brutal. Did you use your ordinary brazing rod on the feeder lines or something with more silver than you use on larger piping?
Straycurrent It was brutal. I actually felt sick at about 2PM when I realized I skipped lunch and hadn't taken a break.
I need to get an umbrella to screw to the side of the units.
I do however have that awesome little Stanley blower fan thing that keeps a breeze on me.
great work looks good what every company you work for most have charged alot for that
what size feeder tubes did you use? I tried this for the first time about a month ago
with a adjustable TXV and 1/8" feeders to be safe and it worked great.
Yea, thats what i would have used too. add a sight glass to help out.
Hey guys . Im having a similar issue.
So how are the feeds going to feed properly without a distributor orifice??
Thank u ❤
Why didnt you heat them and blow nitrogen to clear like your other video?
Replacing fixed metering devices with a TXV has always been Plan A.
The reason I use the nitrogen with heat trick is that most of these units are heat pumps with complicated check valve loops that repurpose part of each coil differently for heat vs cool.
On a straight cool line this unit it doesn't have that mess and I can upgrade it to a TXV type.
The feeders are 1/8” OD? Like Supco BC-4 (0.64) ID. Made one with those, but had very high head pressure with TXV.
Nice work, how are the feeder tubes sized? You need a 10"X10" camping canopy to set up to get out of the sun. thanks for posting.
Dave Miller 1/8" copper tube. Probably about as small as I could go before it would start effecting the feed.
What number of capillary sizes, and how long please Ripley
For 5ton
Does that unit have an actual conversion kit from carrier ? Or u gotta make em ?
Was this a R-22 unit? I’m assuming so, especially with that recip compressor
2:35 that’s a scroll compressor but carrier used those on their r 22 system along with the newer 410a systems
It appears to be r22
are you wearing a sweater?
Kyle Faubertq A light weight one that is night and day cooler than the normal fire retardant uniform. (It meets safety specs for industrial jobs).
It is like t-shirt material but long sleeve.
how mad do you get when you accidentally delete shit? i deleted 4 folders full of pics last week. tried all sorts of ways to get them back. GONE! i was not happy. especially since they were still unposted pics of jobs that are done and gone.
jeff leonard Oh that sucks. It didn't just go to the "trash can" or was this right on a phone or something?
was my laptop, i checked the recycle bin. not there. and did some google searching of how to recover them. GONE.....i survived. not like i dont do this stuff everyday. ill gather up more pics. LOL still irritating though
jeff leonard
I had a hard drive crash a while back with some videos that I wish I still had. It really can suck.