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Old 05-20-2013, 03:24 AM   #31
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A/C charging question


If your pressures are zero you are a little low on refrigerant.

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Old 05-20-2013, 04:55 AM   #32
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How do I find those out?
You check the saturation temp of the lines, and then take their actual temps.

If a fixed metering device. You also need to take the indoor wetbulb temp. To find out what the target super heat is. Use a super heat slide calculator to find out what the target super heat is.
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Old 05-20-2013, 08:56 AM   #33
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.

Start by reading/research, these guys have pointed you in the right direction as a DIY'er it's your job to dig into the books a bit

http://lmgtfy.com/?q=how+to+determin...at+and+subcool

(I'm a DIY'er too, but am mildly annoyed at your questions, tone etc. toward the professionals here and how you portray us)
After I find superheat and subcool how do I know if its in the correct range?
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Old 05-20-2013, 09:54 AM   #34
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why are you not reading the articles or watching the videos or listening to anyone that's answered your questions ten times already? there is no range, there is an exact target number and that is it.
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Old 05-20-2013, 10:11 AM   #35
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why are you not reading the articles or watching the videos or listening to anyone that's answered your questions ten times already? there is no range, there is an exact target number and that is it.
I did look and where do I find the target number?
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Old 05-20-2013, 01:46 PM   #36
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Look in the book for the condensing unit or on the inside panel of the condenser that should tell you what sub cooling number you should be at.
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Old 05-20-2013, 03:44 PM   #37
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Look in the book for the condensing unit or on the inside panel of the condenser that should tell you what sub cooling number you should be at.
and what about superheat?
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Old 05-20-2013, 03:55 PM   #38
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and what about superheat?
You only need one or the other. No way to tell you which. You have to check your coil to verify if you have a TXV or a fixed orifice metering device. If you have a TXV you use subcooling if you have a fixed metering device you use superheat. Subcooling will be listed on your unit or in the manual.

As has been explained to you multiple times, superheat varies depending on outside temp and indoor wet buld temp. No one can tell you what your superheat needs to be unless you post that information.

The youtube video Doc posted explained all of this but apparently you didn't bother watching it.
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Old 05-20-2013, 04:17 PM   #39
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I did look and where do I find the target number?
Reread post #32.
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Old 05-20-2013, 05:58 PM   #40
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Originally Posted by JScotty View Post
You only need one or the other. No way to tell you which. You have to check your coil to verify if you have a TXV or a fixed orifice metering device. If you have a TXV you use subcooling if you have a fixed metering device you use superheat. Subcooling will be listed on your unit or in the manual.

As has been explained to you multiple times, superheat varies depending on outside temp and indoor wet buld temp. No one can tell you what your superheat needs to be unless you post that information.

The youtube video Doc posted explained all of this but apparently you didn't bother watching it.
When my air kicks on it seems to take a while to lower the temp just 1 degree so the air is on longer. Is this normal? Its an 1100 sq foot house, 2.5 ton system. Also, when the suction line enters the condensing unit should there be continuous insulation because it drips for about the last few inches.
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Old 05-20-2013, 06:10 PM   #41
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When my air kicks on it seems to take a while to lower the temp just 1 degree so the air is on longer. Is this normal? Its an 1100 sq foot house, 2.5 ton system. Also, when the suction line enters the condensing unit should there be continuous insulation because it drips for about the last few inches.
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Old 05-20-2013, 06:15 PM   #42
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i smell a troll and it stinks.
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Old 05-20-2013, 07:16 PM   #43
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http://fieldpiece.com/tech-articles/...x14-asx24-ash3

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