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quanchai 08-01-2012 10:02 PM

Discharging ac unit
 
Hi guys i am just wondering

how do discharging a split unit without lossing the compressor oil ?

COLDIRON 08-02-2012 07:09 AM

It's illegal to discharge your unit you have to call a PRO to do it.

biggles 08-02-2012 08:07 AM

the service fittings are on the lines going in with the unit iff the oil is in the compressor lower section.it only moves out in droplets as the system runs...better use recovery/reclaim instead of discharging...:wink:

ben's plumbing 08-02-2012 08:02 PM

Quote:

Originally Posted by quanchai (Post 979391)
Hi guys i am just wondering

how do discharging a split unit without lossing the compressor oil ?

you don't discharge a unit...you recover the refrigerant as per requirement by law....:yes::yes:

quanchai 08-02-2012 08:04 PM

Well i am not able to get any pro to fix this for me as i am outside the US

I have connected my gauges to the suction line and turned on the ac unit
and after 5 min i let some gas out but with the gas oil is coming out ?

beenthere 08-02-2012 08:13 PM

Great way to ruin your compressor.

ben's plumbing 08-02-2012 08:20 PM

Quote:

Originally Posted by quanchai (Post 980107)
Well i am not able to get any pro to fix this for me as i am outside the US

I have connected my gauges to the suction line and turned on the ac unit
and after 5 min i let some gas out but with the gas oil is coming out ?

ok i have to ask....why are you doing this anyway.... what is wrong with your a/c

carmon 08-02-2012 08:29 PM

oh my.....

quanchai 08-02-2012 09:04 PM

i want to uninstall the unit

ben's plumbing 08-02-2012 10:26 PM

Quote:

Originally Posted by quanchai (Post 980160)
i want to uninstall the unit

WHY:huh:

quanchai 08-03-2012 01:38 AM

I am installing a larger unit so i need to unistall the old one and empty its gas befor i store it

the point is that i want to store it without gas in the unit and without lossing the oil in the compressor

scottmcd9999 08-03-2012 05:42 AM

You can't just install a larger outdoor unit without also upsizing the indoor section. Condensers are not "one size fits all". I realize you're trying to save money, but you're going about this entirely the wrong way.

Why do you want to replace the unit in the first place? Is it not working?

quanchai 08-03-2012 07:36 AM

Money is not a problem

I am not just installing a new outdoor unit i am hooking up a complete unit outdoor+indoor
the old one is 1,5 ton the new one is 3 ton

my problem is that i cant get any pro to fix this at the mean time as i am working to far away from the nearest city and stuck with the old and new unit

scottmcd9999 08-03-2012 07:55 AM

You're doubling the size of the system. Is this connected to a duct system, by chance, or is this a free blowing system (like a mini-split, for example).

If it's connected to a duct system, then doubling the size of the system without changing out the ductwork is a bad idea. Ducts are designed to handle a specific amount of airflow. Think of reducing a 2" water pipe down to a 1/2" pipe - you'd get a very strong stream of water (i.e. high velocity) but not a lot of it (i.e. low volume). This tends to create a lot of backpressure on the system, which is not a good thing. Air conditioners need a specific amount of airflow across the evap coil to work correctly, and if you dramatically change the back pressure (and therefore reduce the volume) you'll end up with poor performance, poor humidity control, poor cooling, and high power consumption.

With that said: the only way to remove refrigerant from your old system is to recover/reclaim that refrigerant. You could perhaps pump the old unit down, if it's equipped to do so (and we wouldn't know unless you give us brand, model and serial numbers). Pumping the system down doesn't remove the refrigerant, it simply stores the refrigerant in the condenser section.

quanchai 08-03-2012 08:20 AM

dont worry the unit is ductless - split unit

the unit is going to be stored so i dont want any gas in it

when i try to let the gas out of the system by opening the low pressure valve oil gets out with the gas the same thing happens when doing this by the high pressure side

any way to empty the gas by what is called the ghetto why without lossing the comp oil ?


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