charging an unit

astovall7

what are the first step to the last step in order form in charging an low charge ac unit for your home properly i just finish hvac school and i didnt learn what i needed from the school because of poor instructor and school thank u

Missouri Bound

How have you determined that the unit is low on charge?

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JJboy

Do you have the test tools?

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**Always kill the power ** Hot air rises, but heat will always move from higher to lower temperatures. ** Real man shoot in manual. ** If it ain't grounded, it ain't dead.

Missouri Bound

[quote=astovall7;102399 i just finish hvac school and i didnt learn what i needed [/quote]

Then you didn't learn anything.

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ben's plumbing

take the course over with another school....better to learn 1st... BEFORE YOU GET IN THE FIELD....NOT TRYING TO LEARN WHILE MAKING MISTAKES AT OTHERS EXPENSE...SORRY....ben sr

hvac benny

Start as an apprentice or helper, that's how you will learn

carmon

nothing good to come of this... i hate to say it but you don't know enough to even be dangerous yet... lock your tools away and go back to school..... or work along side someone.... pay attention and learn

beenthere

Step 1. Determine if the system is actually low on charge by taking sub cooling and super heat readings.
Step 2. look for leak.
Step 3. Repair leak.
Step 4. Change liquid line filter drier, and vacuuming system.
Step 5. Add proper refrigerant until sub cooling and super heat are at there proper readings.

evapman

Go out and spend a few grand on tools & test equipment, then back to school and learn how to use them.

bobelectric

If it's a blend like 401-a, you must empty and need to refill because you don't know what happened to the freon mix.

Nickhvactech

1. Verify if there is a leak(superheat and subcool) Verifying its not a restriction, dirty coil, air flow issue with duct work.. return ect.. can go on and on (low sub cool and high superheat-leak)
2. Once verified, find leak.. replace or repair .. pull vacumm
3.Determine metering Device and freon type
4.Charge using superheat or subcool(depends on metering device)
5. Some newer Condensors have tags stating what the require depending on outside temperatures
Good Luck.. but school does help before getting on your own!

carmon

well if your adding refrigerant one must assume there is a leak or the system was undercharged..