shredGnar
Member
I believe too much of the r410 was released, so it's not cooling to capacity.. the air coming out just doesn't feel as cold as my dual hose portable in the veg room..
what should I do if this is the case? how do I find out?
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mini split cooling, but not 100%
- Thread starter shredGnar
- Start date
I believe too much of the r410 was released, so it's not cooling to capacity.. the air coming out just doesn't feel as cold as my dual hose portable in the veg room..
what should I do if this is the case? how do I find out?
Nice find thanks for posting that. you guys still like Mr.slim series?
Hey Evlme2,
Thanks for the link, that coolant tank makes things a lot easier for me. I think the hardest part was running the line sets. I have a 50' run for both indoor units, and I had to replace a line due to a kink.
Anyway, with this, am I right in assuming I don't need to know exactly how much coolant to add? The aircon I bought said it had enough for 25' of lineset. It didn't say if that was total, or for each indoor unit. It also didn't say if the factory charge was for 25' of the 3/8 lineset, or the 5/8 lineset.
Do you need a nitrogen tank to do a pressure test, or is a vacuum test sufficient? One more Q, how do you make your lineset connections? Do you ever have problems with the flare fittings (making/torquing)?
Sorry for the hijack!
edit- I got a Mr Slim 24+9 30k btu for my 6k
Thanks for the link, that coolant tank makes things a lot easier for me. I think the hardest part was running the line sets. I have a 50' run for both indoor units, and I had to replace a line due to a kink.
Anyway, with this, am I right in assuming I don't need to know exactly how much coolant to add? The aircon I bought said it had enough for 25' of lineset. It didn't say if that was total, or for each indoor unit. It also didn't say if the factory charge was for 25' of the 3/8 lineset, or the 5/8 lineset.
Do you need a nitrogen tank to do a pressure test, or is a vacuum test sufficient? One more Q, how do you make your lineset connections? Do you ever have problems with the flare fittings (making/torquing)?
Sorry for the hijack!
edit- I got a Mr Slim 24+9 30k btu for my 6k
G
Guest 18340
I LOVE the Mitsubishi Mr.Slim.
It's sexy, no? I have some pictures I'll post soon to my bunker thread, once the install is done;
https://www.icmag.com/ic/showthread.php?t=209119
G
Guest 18340
PM sent. I'm having issues posting...
yer get the compressor recharged
yer get the compressor recharged
Get it recharged and re install and this time vacumn per instrutions .
I bought a 20,000 btu unit in thailand had indtructions translated from indonesian FFS
after some deliberation a vacumn pump set of gauges and allen keys
which where not called allen keys i got it right .
But yes you need imo to get it recharged the moisture in the system will dammage the compressor eventually. to be sure.A
yer get the compressor recharged
Get it recharged and re install and this time vacumn per instrutions .
I bought a 20,000 btu unit in thailand had indtructions translated from indonesian FFS
after some deliberation a vacumn pump set of gauges and allen keys
which where not called allen keys i got it right .
But yes you need imo to get it recharged the moisture in the system will dammage the compressor eventually. to be sure.A
Here's the PM evl2me sent me:
For some reason I'm having a hard time posting messages. Says it's too short and to lengthen by 1 character.
To answer your questions;
Usually they come precharged with enough freon for the specific application. If it's a dual head unit then it has enough charge for bothe line sets. In your case it should have enough for two 25' line sets.
Check with the manufacturer to be sure. What brand/model is it? I can find out for you.
I don't use Nitrogen. I vacuum the line set, open the valves and use soapy solution sprayed ont eh flares to check for bubbles.
check the factory flares real goo. The MUST be smooth and uniform. If it's not smooth or a perfect shiny ring inside then I cut it off and re flare.
Never had problems with tightening them down.
Hope that helps
evl
I had some problems torquing my 5/8" flare fitted gas line, since it required 55ft/lbs. You need longer wrenches to acheive this, a 10" adjustable won't cut it. I noticed that a lot of installers on youtube will cut off the flare fittings and solder the pipes together using a pipe expander to make a slip fitting on one end.
evl2me, do you ever take this route?
evl2me, do you ever take this route?
A friend of mine has a r134a gauge set, can I use this with an r401a system?
G
Guest 18340
Mind you, I'm a DIY person myself and learned as I went along...
It would seem that you could use r134a gauges because all you're using them for is to read vacuum BUT everything I read up on for 2 years says to use gauge sets designed for r410a. So thats what I bought and use. If an expert chimes in and says it's ok, then so be it. But when in doubt do things the way the manufacturer says to...
They are very inexpensive, 'bout 50-60 bucks on ebay.
I know I said this in an earlier post but it's worth mentioning again; If you can at all spare $150 or so I strongly recommend buying a Digital Micron gauge. Using one is the only true way you'll know that you pulled a deep enough vacuum. Running the pump for hours or overnight is no guarantee you pulled the recommended 500 micron or less...
G
Guest 18340
No. I use an adjustable wrench and (knock on wood) have never had a problem torquing down the nut.
The only thing I may do is cut off the flare and reflare if I don't like the way it looks.
shredGnar
Member
thanks for the link..
so can I just top off the coolant to the recommended pressure using the recharge kit you sent? then vacuum lines and i'm set?
no need to evacuate?
really appreciate all the help!
G
Guest 18340
The way I would do it is top off to the recommended pressure first. Then perform a "pump down" procedure (it should tell you in the install manual how to do it. Pumping down forces all the freon back into the compressor, leaving nothing in the line set) Then I would vacuum the line set. In that order.
shredGnar
Member
thank you very much for all the help man! much appreciated.. I should have this done sometime next week and will let you know how it goes.. if it's cool I'll shoot you a pm with any questions !
how do i give rep?
G
Guest 18340
Shoot me a pm any time
So, using the manifold gauge set to determine vacuum level is not sufficient?
edit- No, the manifold gauge only goes down to -29 hg, which is about 23368 microns. Like evil2me said, you need to pull 500 or less, which is waaay below 29 hg.
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fuck..ive seen how handy you are and you are saying its a pain? I was about to install one of those self installs as well, i have a hard time setting up a ps3... Ill be following this..
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