freeze up

8 Ball · 07-14-2008, 08:29 PM

Thats whats so frustrating...cant get my gauges on it...eh! Im really way out there with the internal bypass thing. Volume with no velocity...eh! Whats the head pressure doing? How does the suction pressure go up, and still freeze, that defies logic.

Theres no drying agents that I have ever heard of, except for a proper evacuation, even dessicants dont dry, they absorb and hold.

I have heard of additives that act like glycol, and dont allow moisture to freeze, the problem with them is that you cant get them back out.

I steer clear of all of it...eh. Old school...do it right...eh!

statman · 07-15-2008, 07:15 AM

Thats pretty damn funny, y'all !!!! By the way, ya almost made my canadian beer shoot outta my nose with your "while you're at grainger, pick up an $8 capacitor" comment in one of the other posts!! Good comedy, eh? Now excuse me while I go turn up the heat..the igloo is damn cold this mornin...

geo fan · 07-15-2008, 06:16 PM

you test for non-condensables ( system off gauges on , saturation temp equels outdoor ambiant , if off non-condensables) . what can happen is the moisture in the pipes can freeze causing temp. restrictions in the expansion device. I have never used it ill reclaim- evac-recharge, because i like to sit around and its the right thing to do if your sure.

statman · 07-15-2008, 11:15 PM

I have no problem with the fact it may be a restriction (dirt, moisture, etc) that may be a problem for this guy. As a matter of fact, it is probably the best way for him to truly be able to find the source of his problem (moisture in system = previous leak, current leak or improper evacuation of system from day 1). My concern is that he has a contractor saying the compressor is bad when the suction line is freezing up....this does not ring true to me. It would be great to know the exact operating pressures during operating conditions and then we could tell. As that is not possible, I would more than likely suspect he is either low on refrigerant OR has a restriction (moisture, etc) in the system that must be removed before a proper system analysis can occur. He should try and get a second opinion from another technician so he can attempt to compare one opinion and diagnosis to another.

8 Ball · 07-16-2008, 07:59 PM

What he said...golden.

typhoon55 · 07-17-2008, 08:39 AM

Quote:

Originally Posted by statman

I have no problem with the fact it may be a restriction (dirt, moisture, etc) that may be a problem for this guy. As a matter of fact, it is probably the best way for him to truly be able to find the source of his problem (moisture in system = previous leak, current leak or improper evacuation of system from day 1). My concern is that he has a contractor saying the compressor is bad when the suction line is freezing up....this does not ring true to me. It would be great to know the exact operating pressures during operating conditions and then we could tell. As that is not possible, I would more than likely suspect he is either low on refrigerant OR has a restriction (moisture, etc) in the system that must be removed before a proper system analysis can occur. He should try and get a second opinion from another technician so he can attempt to compare one opinion and diagnosis to another.

second opinion complete....
system low on gas period
what i do not understand is the first tech supposedly charged the system ( i watched) but i think his guages and / or tank were faulty. the freeze up continued and the pulsing of the small tube were present.

the second tech explained that the pulsing was a sign of low gas and it dissappeared when he charged the system. I was concerned that it may be a leak but seemed to hold the charge so will see ...

statman · 07-17-2008, 09:05 AM

Glad to hear ya got it working. Just a word of caution - if the system worked great for years before and now it needs refrigerant, you more than likely have a leak in the system. Dont be surprised if you have the same problem again in a month or so.

8 Ball · 07-17-2008, 10:57 PM

Sitting there....all smug in your igloo...eh!.

Ruslan · 07-19-2008, 02:34 PM

Can any body help me answear these questions? Im studying for my certification its hard as hack. I hape many more questions if yo can please help me out you can email me at ruslan33760@yahoo.com thanks.

1.when recharging a refrigeration system with R-11 what vapor pressure is necessary in the shells befour charging with liquid?
A.21.1'' Hg vacuum
B.19.7'' Hg vacuum
C.18.1'' Hg vacuum
D.16.9'' Hg vacuum

2. where is the lowest access point on the low pressure centrifugal air-conditioning appliance?
A. the evaporator charging valve
B. the condenser service valve
C. the compressor cooler jacket
D. the purge unit exhaust port

3. After system servicing, why is refrigerant vapor re-introduced to the refrigeration system befour refrigerant liquid?
A. vapor charging increases pressure slowly, preventing failure of the rupture dick.
B. vapor charging is faster than liquid charging
C. liquid charginf is more difficult to control then vapor charging.
D. liquid charged into a deep vacuum will boil and may lower temperatures enough to freeze water in the tubes.

8 Ball · 07-20-2008, 07:44 AM

Somebodys trying to get thier Universal Certification.

The answers are in the study guide.

Ruslan · 07-20-2008, 04:44 PM

see that is the thing, that i dont have the styde guide's, and i have no were to get answeas. I tryid all kiend of books ni luck all all, all even pay somebody to give me answears so i can styde let me now.

ruslan33760@yahoo.com