How to repair a Carrier or Trane multiple orifice header without removal
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- čas přidán 29. 08. 2024
- This is a procedure to clear the restrictions from the Carrier and Trane multiple orifice header assemblies that like to restrict with debris. Typically the debris are some sort of wax build up from the oil.
Initially I just rep[laced the restricted tiny OEM filter driers which were indeed so restricted that I could not blow through them.
Circuit #1 on this still had some restriction in the orifice header assembly. The suction pressure wasn't very low it was restricted enough to have over 30 degrees of superheat on a dry hot day.
So I pulled the charge again and performed this procedure to clear the orifices.
So far this has worked every time on a Carrier unit and today I was successful with a Trane unit as well.
Just tried this today and it worked. Thanks man!
Nice!
I spoke to a Trane tech support on this issue. They have a TXV conversion kit and I was told to install crankcase heaters that is one of the reasons why there's some waxing the oil gets thickened up or something like that if there's no crankcase heater. Where I work at a school district main server room is served by one carrier with that style of metering and I put crankcase heaters on there and haven't had a problem in almost 10 years
Thank you for this advise!
Cool, these headers are a huge pain in the ass to change out. I agree that a TXV retrofit would be the way to go if no success
I hear u brother When my daughter call me I may be in a ladder ,,,,,,,roof......under a mob home.....or an attic and I ll drop everything to answer the phone......,I guess is her mom legacy for me..,,,.she is gone but I got her........hey You are a great mechanic being in RTU in roofs many times n sometimes we do our best or all we know,,,,,,this is a great video. Tnks n bless you and your family
Your are a MASTER! I just saw your video and saved my ass..! BIG TIME Thank you so much for sharing your tricks
Thanks for this great video about restriction in trane and career, i have all the time the same problem , high head pressure and low suction r 22
Great video, I come across a lot of trane and carriers with these metering devices running high head and low suction lol
Thank you for this video. These old Carriers, Bryant’s and Tranes are surrounding me …:). I’ve got one 10 ton Carrier for tomorrow (this one is only 4-5 years old) and one Dino Carrier that is ~25 years old for another day. For r-22 I usually drill them with pretty good outcomes. Will try your method with acetylene torch. It seems a bit easier.
I have done the TEV upgrade on a Precedent unit like that. I was done in less than two hours. I recommend it over the orifice header system.
It works we do it too, we usually add driers with flares and ball valves. End up having to clear them several times and keep changing the driers. Love ur videos long time fan
Wow that's a bit of work. SO far I've been fine if I just add a larger drier.
Good trick. Thanks. Every day is a school day
Thanks for the great technical tip.
That pinch-off tool is familiar; I haven't seen mine in a while... Guess I haven't needed it too bad haha
I used the old thing again today.
It is 15+ years old I think.
I think I still have one somewhere, been probably over 20 years since I used it.
Ahh, the god old days, when you could pinch off the liquid line on a unit with no service valves to pump it down, do your repair, and just purge the lines with refrigerant, reround the pinched off pipe, and get on to the next call. :D
Very cool to have worked..
Will try that on next restriction!
Appreciate.
Bryan Tyler refrigeration
Good job Buddy
Nice, I have one tomorrow. Hope it works
How did it go? I’ve got two of these guys in a line. .
Great job man👍
Great tip, thanks.
So you put the nitrogen in on the suction side
Some of these videos I watched they blow the stuff into the coil
Was looking for the metering device is just a pipe nothing more , so you recommend me to cut the liquid line before the evaporator and heat up the orifices the blow nitrogen through the suction line and didn't need to flash the system with r 11
Very helpful
Great video. Why does carrier and trane design these this way. What's wrong with a txv and distributor?
is it possible to be successful by just heating and running the compressor without opening it up?
Thanks in advance. Great vid
It could be scary if the system pipe came apart under pressurized refer so I never tried that.
Has anybody tried a additive Trane sells. I think it's called MJX. Heard about it from my Rheem sales rep but haven't tried it yet
Someone was mentioning how one manufacture wanted the techs to run some sort of chemical through the system (on warranty) before getting parts to repair the restriction.
Nice!! did you make that jumper?
How hot is your ambient temperature? And how hot was the return air temperature ?
I’ve worked on the same model unit and cleared the metering device and I’ve been able to bring it down to 240 psi on a 93 degree day with 80 degree return temperatures
Pressure dropped further when return temperature cooled down
I don't recall what it was when I made the video but as of mid October were just now getting down to high temps of ONLY 100.
We run high temps of 100 to 120 degrees from May through October.
I posted this on Sept 7th of that year so it was done then or days earlier.
So probably 105 to 110 degree high temps.
Hey brother, just curious, why is 3degrees SH acceptable? In class we were thought 5 to 20 as the range, anything under 5sh you’re getting into risky territory
This was years ago so I don't recall more details but in the video I noted it was a little low at that moment.
Pulling panels off and on repeatedly during the recording may have skewed it a few psi vs degrees etc.
It is a fixed multi piston device. Only adjustment would be adding load via more supply fan cfm to increase superheat.
Fixed metering devices otherwise have no adjustment.
Replaced a compressor for trane and the filter drier and my head pressure is about 320 - 330 psi and low suction about 38 -40psi
Do you believe it's absolutely necessary to use that much heat? Or maybe a better way to ask the question , have you had success using less Heat? Thanks, Pete.
I figure go big or go home. LOL
Thank you for the tip! I’ve got two of these guys lined ahead of me :)
I used to drill these headers. Drilling does work great, but it is time consuming and it’s not very easy thing. Will try MAP gas this time.
@@edlauren9434 how did that work out for you? I’m might be doing this soon
Muy chingon
Do you have a video of converting it to txv?
Yes. However that only works on straight cool units.
Heat pumps have header check valves and the coil feeds all tunes in parallel for evaporator mode but separate a subcool loop in condenser mode.
Is there any way you can send me a wiring diagram for that cool jumper tool you have?
Sir can you tell me the right size of orfice in mm
Is have no reason to have that information.
The orifices aren't something you buy by themselves.
If replaced you order the orifice header manifold for the specific system.
replace the whole units and have all the bad units drop shipped to their corporate offices, right at the entrance's..
COND COIL DIRTY AS HELL
Did you watch the video?
The coil face wasn't shown in the video and the readings do not indicate a "dirty as hell" condenser coil.
A very used unit and all however the OD Coil was not the issue.
The issue was a restriction in both the filter drier and the multiple parallel indoor coil fixed pistons.
Something that occurs in these units occasionally and was repaired in the video.
Temporary unplug a system with overheated chemically broken down oil still circulating. Also old R-22. You didn't do anyone any favors playing cowboy tech.
Installing an actual filter drier ahead of the metering device has done wonders.
I've yet to go back to any of these fixes and find them plugged again.
Even the compressor has hung in there on most of them.
And this repair is like $2k cheaper than replacing a coil (what most techs do to fix it) so yeah. I did them a favor and saved some $ not too mention could fix the unit in the same day.