High Side
What pressures do the high and low side run at on central air conditioners?
I do car AC but never my house, does anyone know the high and low side pressures that a central air unit runs, at present its 75PSI on the suction side and 225PSI on the high side, its a 3 ton 10 seer.running r22
any answers would be welcome.
Chris
It is according to the tempature outside and your indoor heat load.
Normal Low side at 80 degree outdoor and 76 indoor would be about 72psi suction 225 head pressure.
If your head is higher than 250psi check you outdoor coil for dirt.
hope this helps
High Side
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