Discharging ac unit

scottmcd9999 · 08-03-2012, 11:05 AM

I don't know what the "ghetto way" is. The only legit way to remove refrigerant is to reclaim/recover it.

Why would you NOT want to store it with refrigerant? Doing so will keep the system in much better shape, and would be a lot easier on you.

raylo32 · 08-03-2012, 01:12 PM

Why don't you just pump it down and store it with the refrigerant in it for now. Nothing wrong with that as that is how they usually come from the mfg. Do what you need to do with the new system and then decide how to recover/discharge the refrigerant from the old unit later at your leisure.

quanchai · 08-03-2012, 06:08 PM

Ok but can some one just tell me why oil comes out with the gas ???

**beenthere** · 08-03-2012, 06:11 PM

Because they are mixed together. As they should be, to assure oil return to the compressor.

quanchai · 08-03-2012, 06:17 PM

so if recovering the gas would the com not lose oil ?

PS
how do you add oil to home AC compressors ?

Marty S. · 08-03-2012, 06:34 PM

Quote:

Originally Posted by quanchai

how do you add oil to home AC compressors ?

The correct way would be to remove all the oil from the compressor then put the specified amount on the compressor tag back in. Those mini splits are touchy. You can't just add/remove oil or refrigerant willy nilly.

quanchai · 08-05-2012, 06:20 AM

there must be a way to add oil ?

scottmcd9999 · 08-05-2012, 06:51 AM

There are pumps you can use to force oil into the system through your charging hoses, but it's hardly a precise process, and over-oiling can cause problems too. Almost all residential systems are semi-hermetics, which basically means they are sealed systems, with the only openings being those designed for charging and checking pressures. There are no oililng ports for the refrigerant system.

**beenthere** · 08-05-2012, 06:53 AM

I think you mean hermetic. Haven't seen a semi hermetic on a resi system.

scottmcd9999 · 08-05-2012, 07:05 AM

Doooh ... you're right, got the terms backwards.

Didn't Carrier make a low speed residential system with a semi-hermetic? I remember dragging one of those beasts out of a back yard many years back. One of the heaviest residential condensers I ever dealt with - my back remembers it to this day! Might have been one of the old low speed compressors, though, now that I think about it. Those were monsters too.

I know Chrysler had some old tanks, but I don't recall those being semi-hermetic.

**beenthere** · 08-05-2012, 07:10 AM

Quote:

Originally Posted by scottmcd9999

Doooh ... you're right, got the terms backwards.

Didn't Carrier make a low speed residential system with a semi-hermetic? I remember dragging one of those beasts out of a back yard many years back. One of the heaviest residential condensers I ever dealt with - my back remembers it to this day! Might have been one of the old low speed compressors, though, now that I think about it. Those were monsters too.

I know Chrysler had some old tanks, but I don't recall those being semi-hermetic.

Carrier did a lot of strange things over the years. So I can't say they never had a semi in a resi. I just don't recall one. I'm senile though, so that doesn't mean much. LOL

The old compressors were made like a tank, to last for a long time back then, so they were heavy.

quanchai · 08-05-2012, 09:28 AM

Lets say you over charge a unit with gas and you want to let some of the gas out
this happend to me ones so i had to purge the over charged gas out and with the gas oil came out (TO MUCH OIL)

**beenthere** · 08-05-2012, 09:41 AM

Quote:

Originally Posted by quanchai

Lets say you over charge a unit with gas and you want to let some of the gas out
this happend to me ones so i had to purge the over charged gas out and with the gas oil came out (TO MUCH OIL)

Even Kuwait signed the Montreal Protocol.

You don't purge out extra refrigerant, you recover it.

ben's plumbing · 08-05-2012, 09:41 AM

Quote:

Originally Posted by quanchai

Lets say you over charge a unit with gas and you want to let some of the gas out
this happend to me ones so i had to purge the over charged gas out and with the gas oil came out (TO MUCH OIL)

ok I have listened to this post long enough ..have to say this....if you are a hvac mechanic with proper tools and equiptment you would not overcharge a unit..you would not release freon into the air..and i know you said you were in tim buck too...lets say you call a service company and wait ..before you end up hurting yourself...IMO ben sr

quanchai · 08-05-2012, 10:14 AM

Well i want to fix this by my self i got a vacum pump + a empty gas recovey tank
will i lose oil from the compressor if i use this GREEN method ?