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Superheat 1.0 subcoling 18.2 ????? 93.3 Psig Low side, 271 Psig High side R-22

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Discussion starter · #21 ·
Thanks to everybody trying to help.

I am just the owner of the house. The guy who is trying to fix the unit is a friend of my brother in law, which is a HVAC certified and work in the field everyday fixing ac units in an apartment's condo. Obviously, that title does not means knowledge!

Well, he replaced the compressor today, but the AC is not able to reach 75 inside the house (90F outside). I couldn't take pictures of the pressure today, but I was able to see the low pressure in 70psi and the high side in 235psi. I don't know the other values because he didn't bring the digital gauges today.

I have done a lot of research online and I kind of understand very basic HVAC stuff. I would really like to have some advice, at least to be able to know if the way this guy is following is the right one of if I need to go other way.

The compressor he installed is a Copeland CR22k6 and it is tuning off after maybe 30 min. of running, then after couple min. it starts again normally (compressor only, the fan keeps running). For me it is obvious that there is some protection stuff to prevent damages on it, but this guy said it could be normal and that he was going to call Copeland tomorrow just to verify.

Please, it is obvious that I put my unit in somebody without the knowledge, but I already spent to much money to start again empty-handed. So, if anyone knows the problem, I will really appreciate any possible instructions and I promise that I will make this guy do it.

Thanks!
 
#22 ·
Why did he replace the compressor???
Hire a real company. Your waisting your money with this idiot.
 
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#23 ·
...it is tuning off after maybe 30 min. of running, then after couple min. it starts again normally (compressor only, the fan keeps running). For me it is obvious that there is some protection stuff to prevent damages on it, but this guy said it could be normal and that he was going to call Copeland tomorrow just to verify.
Click to expand...
The compressor 'only' shutting down, is not the usually or normal operation...the compressor & condenser fan should shut down at the same time.

The condenser has a 23°F temp-rise.
What SEER is the Condenser?
Was the replacement compressor a proper match?
What type refrigerant metering device; fixed orifice or TXV?
Does metering device match condenser?
 
#24 ·
As mentioned several times, stop wasting money with this moron and hire a real company.
 
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#26 ·
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#27 ·
Ok... Let's get this straight.

The first pic shows a compressor functioning well, but seriously mischarged.

To have changed the compressor is outrageous... To think the compressor shutting down when the fan is still running is complete stupidity.

The guy you have working on your house with his boss's tools is supremely inexperienced in the field of hvac. Call ANY service company, bend over and pull your wallet out... And pay for proper service. At this point, replacing the system may be the only way you are going to get cooling.

Politely tell the neophyte you do not want him touching anything in your house again, and just pay a real tech.
 
#28 ·
henryaga said:
Thanks to everybody trying to help.

I am just the owner of the house. The guy who is trying to fix the unit is a friend of my brother in law, which is a HVAC certified and work in the field everyday fixing ac units in an apartment's condo. Obviously, that title does not means knowledge!

Well, he replaced the compressor today, but the AC is not able to reach 75 inside the house (90F outside). I couldn't take pictures of the pressure today, but I was able to see the low pressure in 70psi and the high side in 235psi. I don't know the other values because he didn't bring the digital gauges today.

I have done a lot of research online and I kind of understand very basic HVAC stuff. I would really like to have some advice, at least to be able to know if the way this guy is following is the right one of if I need to go other way.

The compressor he installed is a Copeland CR22k6 and it is tuning off after maybe 30 min. of running, then after couple min. it starts again normally (compressor only, the fan keeps running). For me it is obvious that there is some protection stuff to prevent damages on it, but this guy said it could be normal and that he was going to call Copeland tomorrow just to verify.

Please, it is obvious that I put my unit in somebody without the knowledge, but I already spent to much money to start again empty-handed. So, if anyone knows the problem, I will really appreciate any possible instructions and I promise that I will make this guy do it.

Thanks!
Click to expand...
You need someone that knows what super heat and subcool values are telling them.


Due to our site rules, members are not allowed to tell you what is wrong and how to fix it. As that would be DIY advise. And even if you aren't going to do the repair. It would be advise someone else could follow down the road.
 
#29 ·
To the OP, let me see if I can get close.
You knew a guy who knew a guy, who is doing uninsured and unlicensed repair side work from his normal apartment maintenance job, because he gave you a "deal" on rates and/or prices. Now you sit here, still hot, after many hundreds, maybe even thousands spent on a unit that still doesn't run, nor has any warranty on what's been done. Now you've spent much more then you would have just calling a professional company, and your wondering what to do now because you don't have much more money to spend on your equipment. You might even be realizing you could have had brand new equipment for what you've invested so far.
Well, nows the time to pony up and open the wallet to pay a real company to fix what your side job guy screwed up.
Did I come close to reality?
 
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Discussion starter · #31 · (Edited by Moderator)
Thanks to everybody again.

I completely understand your point of view. It is completely clear for me now, that this guy is not a real technician and his level of HVAC knowledge is so very very basic, maybe even more than mine now, after all research I have done these days.

I tried to find a normal company before this guy and after the third one coming and giving me the same option to have a warranty of the work done; replace the entire system just after the first question they asked ( how old is your system? ) I just went for the only one giving a chance to the fixing instead of replacing the entire system. Maybe that was not the easiest way to get this problem solved, but at least I am not expending $ as all my neighbors when something happened to their AC units last summer.

Maybe I didn't try the right companies, maybe that's the regular way to fix AC units in this area. I don't know! The only option that I have right now is to keep trying to get a better idea of what is happening and find a way to get that done to the HVAC system in my house ASAP. Once again, I really appreciate all the comments you have already sent.

After trying to get more in the technical data of my unit, I found a wrong setting in the "piston" or metering device as it should be called, the one installed in the furnace is 0.059 and the one the technical data of the outside unit (NAC024AKC) say is 0.053. As I said before the compressor of this outside unit was replaced yesterday, and I know it was replaced for the right model as the Copeland replacement chart stated.

Could somebody help me with the superheat and subcooling chart? I already found some data telling me how to see and compare numbers to find possible causes of problem in the system with that information, but I still need the superheat and subcooling values of my unit and I could not find them.

Thanks a lot for any help,
 
#32 ·
Where are you located? Try our pro locator. These guys know their :oops:
 
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#33 ·
Why was the compressor replaced?
We can't help on technical info, the site doesn't allow DIY information.
I'd say at this point, a professional tech is a requirement
 
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Discussion starter · #34 ·
udarrell said:
The compressor 'only' shutting down, is not the usually or normal operation...the compressor & condenser fan should shut down at the same time.

The condenser has a 23°F temp-rise.
What SEER is the Condenser?
Was the replacement compressor a proper match?
What type refrigerant metering device; fixed orifice or TXV?
Does metering device match condenser?
Click to expand...


The condenser has a 23°F temp-rise.
I am not sure about the question/answer. Outside temp. 90F, inside temp 75F (that's the lowest without let the unit be working all day long), air coming out of the vents 65F

What SEER is the Condenser?
10

Was the replacement compressor a proper match?
Yes

What type refrigerant metering device; fixed orifice or TXV?
Metering device.

Does metering device match condenser?
No. The device installed is 0.059 and the recommended one should be 0.053. I just found out the specs of the unit because I didn't the model number until I found it online couple hours ago.

Thanks!
 
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henryaga
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