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Old 07-15-2013, 10:13 PM   #16
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air handler change out...issues..


Please be be patient with me but what does sc sh mean. Please xplain much appreciated.

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Old 07-15-2013, 10:16 PM   #17
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air handler change out...issues..


SC= Subcooling. SH= Super heat.

Subcooling, the amount of temp the liquid line is below the saturation temp read on the high side gauge. Superheat is the amount of temp the suction line is above the saturation temp read on the low side gauge.
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Old 07-15-2013, 11:09 PM   #18
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air handler change out...issues..


how did you "LET" the Freon back into the system from a standing vacuum?did you purge the charging hose on the flip onto the Freon tank?did you just let the Freon gas enter both hi/lo with the compressor OFF?should of went directly into the liquid line with the reclaimed charge le it equalize and start the unit up...then add the balance of Freon thru the suction...if the space is hot you might see 75-80PSI on that suction with the warm air over the evap 18F split there... coil.head pressure max should be 30F above inlet air at the condenser on that F inside ring on the discharge for 22 guage...then do SH?/SC
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Old 07-16-2013, 04:53 AM   #19
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air handler change out...issues..


In the OP, he said they ran the R22 back up to the compressor.

His way of saying pumped down to condenser.

30 above outdoor temp on a 13 SEER is a gross over charge.
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Old 07-16-2013, 07:38 AM   #20
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air handler change out...issues..


Quote:
Originally Posted by beenthere View Post
In the OP, he said they ran the R22 back up to the compressor.

His way of saying pumped down to condenser.

30 above outdoor temp on a 13 SEER is a gross over charge.
I am not even a hvac tech, but common sense told me when I first say this topic, something was askew. Thanks for coming along beenthere. I could only do what I could, not get into the other details, even though it is easy to understand, after following these topics all the time on hvac, of what is right, and what is wrong.
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Old 07-16-2013, 01:37 PM   #21
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air handler change out...issues..


After we took of the vac at 345 microns standing for 2 hours, we then let the charge out of the compressor slowly and flooded the lineset and coil. Waited about 20 minutes and then fired up the unit. It was cold from there. I said in my last post he came back put gauges back on. I am going to get a tech out here who knows exactly what he is doing and going to have the fine tune the SC/SH for both my units. I may have to pay top dollar to get someone who is actually going to do that but if it going to make my units work right its worth it. I appreciate the help. He wanted to add more R22 to get the air colder but I would not let him as I didn't know if that was correct or not. I am surprised that a certified HVAC tech didn't know all that you guys have taught me in 2 days. People need to pay attention in class and stop chasing a pay check.
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Old 07-16-2013, 02:57 PM   #22
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air handler change out...issues..


You do not have to pay top dollar to find someone that knows what they are doing.

Suggest your cousin either go back for remedial training, or still a Journeyman and not enough time under his belt, listen to the old guys in the shop.
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Old 07-16-2013, 03:41 PM   #23
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air handler change out...issues..


Your right have to agree. Thx
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Old 07-19-2013, 07:39 PM   #24
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air handler change out...issues..


Used the chart sent by gregzoll. Thanks works great now. Also changed the dipswitches around and slowed down the fan speed 7th and 8th dipswitch changed. This unit has variable speed. Works great now. Thanks everyone. Learned a lot.

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