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Thread: Help
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14-01-2011, 10:07 AM #1
Help
A novice!
Can anyone advise what temperature i should expect on an R22 a/c System after the condenser (expansion device is in the outdoor unit).i pressume at 250psig it shoul be 45 deg c
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14-01-2011, 10:30 AM #2
Re: Help
hi welder,
on my compariter 250psig=47c
the psig after the ex , valve which is now part of the evaporator< thats why its got armaflex on it< can drop to 58psig but most a-c units run a little higher, up to 70 psig.
the reason for having the ex, valve in the condencing unit is to save on the ammount af gas in a system,
hope this clears up your question,
sedgy,
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14-01-2011, 04:02 PM #3
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14-01-2011, 04:14 PM #4
Re: Help
hi welder,
I retiered years ago so I would not comment on this new stuff, but when setting up your system , you can normally trim your suction temp by first weighing in the refrigerant, and if you are lucky you can adjust the con,d fan to give a ideal temp to the liquid < the higher the liquid temp , the higher the suction temp < to a limit of couse
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15-01-2011, 10:20 AM #5
Re: Help
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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15-01-2011, 10:23 AM #6
Re: Help
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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15-01-2011, 11:28 AM #7
Re: Help
peter, thank you for your views about inverters, I did not know that, I have never worked on one, welder never told me it was an inverter, and with it being on R22 I doubt it. as I said in my thread , I have been retired a few years now, and I did say if you are lucky you can adjust the con,d fan to trim the temp,
regards sedgy
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17-01-2011, 05:41 PM #8
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26-01-2011, 04:11 PM #9
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Re: Help
If you are talking about split system, than in cooling mode, both lines are part of evaporator and what you see as 5°C is line with flash gas between expansion device and indoor unit heat exchanger (that mean saturation temperature) and 13°C is line between heat exchanger and 4 way valve in indoor unit which mean that temperature represent superheated vapour. 13°C-5°C = 8K superheat.
Is it correct or not, depend on superheat table given by equipment manufacturer and value depend on indoor air wet bulb temperature and outdoor air dry bulb temperature and correct air amount.