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21-07-2009, 02:46 PM #1
Suction pressure temperature chart Goodman unit
This weekend I just fired up a brand new Goodman system. R-410A refrigiant. The Suction pressure temperature chart in the Condensing Unit installation & service reference that came with the unit only goes up to 80 psig, yet I'm seeing 135 psig at the low side service valve. Looking elwhere I found that 135 psig is 47F. High side 285 psig which is 92F. Spec is SH 7-9F and SC 7-9F (using TXV).
At 74F indoor stabilized temp I get:
SH: 58F - 47F = 11F (too high)
SC: 92F - 79F = 13F (too high).
So I need to recover charge, right?
About 17 feet of line set. Did not charge the system, only used what came with the compressor.
Did anyone else find it odd that the chart in the manual is below what appears to be the operating range?
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