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Old 03-14-2012, 02:38 PM   #1
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low side R22 gauge reading at 80 degrees


What should my lowside gauge reading be at 80 degrees with proper charge?

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Old 03-14-2012, 03:12 PM   #2
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low side R22 gauge reading at 80 degrees


If you are checking the charge then you need to check it by Sub-cooling (TXV) or Super heat (Piston). If you are doing it any other way you are just guessing.

The are to many variables to say what should the reading be with an outside temp of 80.

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Old 03-14-2012, 03:43 PM   #3
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low side R22 gauge reading at 80 degrees


What was the indoor wetbulb temp.
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Old 03-14-2012, 04:59 PM   #4
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low side R22 gauge reading at 80 degrees


I assume its in cooling. the compressor isnt pumping. If it is running then the clutch plate in the compressor is possibly stuck or the reversint valve is malfunctioning. Granted I have made a lot of very broad assumptions in this post.
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Old 03-14-2012, 05:00 PM   #5
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low side R22 gauge reading at 80 degrees


Sorry. I just realized you meant the outdoor temp is 80.
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Old 03-14-2012, 10:29 PM   #6
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low side R22 gauge reading at 80 degrees


quick and dirty:

outdoor air temp 80 deg (thinking indoor air temp is mid 70s- 60ish psig -
light load on the evaporator - all other things being equal - but like the other response without subcooling (if TXV) and/or superheat and maybe a charging chart blowing around inside the unit you can never tell on charge.

an ok gauge reading by itself now but come to PHX in July and its looooooow without subcool/superheat. lots of 'tune-ups' around here with this problem
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Old 03-15-2012, 04:57 AM   #7
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low side R22 gauge reading at 80 degrees


I believe the OP is in a somewhat humid area. So his indoor load may have been higher then what you think.
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Old 03-15-2012, 08:36 AM   #8
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low side R22 gauge reading at 80 degrees


Absolutely agree and a factor (like 20 other things), I was going to keep any psychrometrics out of it to save everyone a headache.

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