401a
Do refrigeration techs normally carry a refrigerant identifier as a part of their arsenal?
It was common in MVAC shops to keep the shops R12 from getting dirty from all kinds of creative mixtures people put in their car AC.
[Avatar photo from a Florida training accident. Everyone walked away.]
2 Tim 3:16-17
RSES CMS, HVAC Electrical Specialist
Member, IAEI
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134a with cap tubes.... thanks for that little gem whoever thought up that combination.... grumble grumble
Yep, and so is that fridge
Is there anything that can clear that wax?
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There's a tool that you attach to a cap tube and push it out with thousands of psi with oil or solvent. It's pressurized with a screw down oil pump or hand driven hydraulic pump.
It was in the same refrigeration and HVAC book that talked about cutting open a hermetic compressor for repair.
Thank you.
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Officially, Down for the count
YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET
I know enough to know, I don't know enough
Why is it that those who complain the most contribute the least?
MONEY CAN'T BUY HAPPINESS. POVERTY CAN'T BUY ANYTHING
Changing the cap tube is still the best option since you're assured of "fresh from the factory" passage of refrigerant. If they brazed the cap tube to the suction line as a heat exchanger, duplicate it by making a new line set. The cap tube doesn't need to be brazed to the suction line. Soldering the lines together will serve the same purpose, requires less heat and far easier to apply.
I learned AC&R in the Navy and Coast Guard, and before I retired the Coast Guard went on a binge of upgrading all their R-12 units to R-134A. The AC's were fine, but, the refrigeration units were a problem. All the systems used a semi hermetic compressor. Inorder to maintain the same box temps as had been kept with the R-12, the suction pressure would drop into a good vacuum causing air and non condensable gases to build up in the system. I've seen ship A Gangs in arms as to whether they will accept the higher freeze box temp or accept the air needing to be vented off the condensor. The Vigerous and the Reliance had to use the same ship one summer. The Reliance bought a small chest freezer to use for ice cream and prepared to accept the higher freeze box temp. When the Vigorous used the ship for a patrol, they maintained the lower temps, yet had to vent off the air from the condensor from time to time. When they returned the ship to New Hampshire, there was a battle between the engineers on each crew as to why the air was being vented every other watch, and why the box temp was not being maintained by the other crew.
I know that several AC's are sold that use R-134A, and even a couple refrigerators, but, R-134A is not a good replacement for R-12 for use in refrigeration. I would never recommend that anyone simply upgrade their R-12 to a R-134A system, unless it's an AC, like in their car.