DYI Freon, how much is too much/not enough without a gauge?
08-04-2012, 08:14 PM
#1
DYI Freon, how much is too much/not enough without a gauge?
Hey guys,
I want to charge the AC on my 84 T/A, but have no idea how much is in it or now much is "Charged"...and I don't want to put too much in. Also, which port is the high and low? Is the one on the cannister the low or the one on the lower line (by the frame) the low? Simple questions but search hasn't dug up anything concrete and I can't find my Chiltons, it's buried in a box somewhere after our move here.
I want to charge the AC on my 84 T/A, but have no idea how much is in it or now much is "Charged"...and I don't want to put too much in. Also, which port is the high and low? Is the one on the cannister the low or the one on the lower line (by the frame) the low? Simple questions but search hasn't dug up anything concrete and I can't find my Chiltons, it's buried in a box somewhere after our move here.
08-06-2012, 06:55 PM
#3
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Re: DYI Freon, how much is too much/not enough without a gauge?
I'll try to help you since you are a nice guy and I shipped you parts before. Total charge 3 pounds or 48 ounces of R-12 if you have converted to R-134a 80% of the R-12 charge. If you have no refrigerant in the system due to a leak or component replacement, the system will need to be evaccuated with a vacuum pump first to remove all non condensables (air) If you feel you need to add refrigerant, you first need to find the leak unless you feel that it is a very small one.
The line you need to tap onto is one leaving the large aluminum canistor called an accumulator. Running at 1500 rpm R-12 pressure should be 38 psig, R134a 44psig. Make sure you are doing this outside and not in a garage.
BTW, I was in the HVAC industry for 30 years
The line you need to tap onto is one leaving the large aluminum canistor called an accumulator. Running at 1500 rpm R-12 pressure should be 38 psig, R134a 44psig. Make sure you are doing this outside and not in a garage.
BTW, I was in the HVAC industry for 30 years
08-07-2012, 05:11 AM
#4
Re: DYI Freon, how much is too much/not enough without a gauge?
I'll try to help you since you are a nice guy and I shipped you parts before. Total charge 3 pounds or 48 ounces of R-12 if you have converted to R-134a 80% of the R-12 charge. If you have no refrigerant in the system due to a leak or component replacement, the system will need to be evaccuated with a vacuum pump first to remove all non condensables (air) If you feel you need to add refrigerant, you first need to find the leak unless you feel that it is a very small one.
The line you need to tap onto is one leaving the large aluminum canistor called an accumulator. Running at 1500 rpm R-12 pressure should be 38 psig, R134a 44psig. Make sure you are doing this outside and not in a garage.
BTW, I was in the HVAC industry for 30 years
The line you need to tap onto is one leaving the large aluminum canistor called an accumulator. Running at 1500 rpm R-12 pressure should be 38 psig, R134a 44psig. Make sure you are doing this outside and not in a garage.
BTW, I was in the HVAC industry for 30 years
08-19-2012, 04:33 PM
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Re: DYI Freon, how much is too much/not enough without a gauge?
You can also put a thermometer in your vent and watch the temperature of the air. Less than scientific but it works, add refrigerant slowly and watch that thermometer. At 2000 rpm with all climate controls on the high settings you should be fully charged somewhere between 50 or 60 degrees at the vent.
08-20-2012, 07:57 AM
#6
Supreme Member
Re: DYI Freon, how much is too much/not enough without a gauge?
When I did mine they had a refill kit that came with a gauge that wasn't to spendy.
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