Air Conditioning - Piston size in evap coil
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BrianCon
06-06-06, 08:03 PM
I have a Bryant 2.5 ton AC unit (561Cj030) and this winter I had to replace my furnace. When the furnace was replaced, the evap coil was replaced with a carrier coil (ck5bxa036017). I notice the part number on the coil indicates it will have the 3 ton piston in it (70 size) instead of the 67 size the manual calls for. Is this going to make a difference in cooling capacity? compressor life? Efficiency?
I realize its best to have the right size piston, but for this difference, now that the system is up and appears to be working just fine, is it worth the hassle to have it evacuated, piston changed, and refilled?
I realize its best to have the right size piston, but for this difference, now that the system is up and appears to be working just fine, is it worth the hassle to have it evacuated, piston changed, and refilled?
Grady
06-06-06, 08:23 PM
The piston may have been changed when the coil was installed.
The factory piston may have been a 70 but it could have been changed in the field. Also that 70 piston may be the correct match for your condensing unit. I don't have access to the Bryant/Carrier match charts. I suggest you talk to the installing dealer.
The factory piston may have been a 70 but it could have been changed in the field. Also that 70 piston may be the correct match for your condensing unit. I don't have access to the Bryant/Carrier match charts. I suggest you talk to the installing dealer.
BrianCon
06-06-06, 08:40 PM
The piston may have been changed when the coil was installed.
The factory piston may have been a 70 but it could have been changed in the field. Also that 70 piston may be the correct match for your condensing unit. I don't have access to the Bryant/Carrier match charts. I suggest you talk to the installing dealer.
Nope piston was not changed. The carrier manual states 67 size for the compressor, the coil has a 70 in it per part number. The hvac guy never took the flared fitting off so I know he did not replace it (he just sweated the line to the bit of tube that was on the coil). The reason I am asking here is because the installer stated it was not an issue.
The factory piston may have been a 70 but it could have been changed in the field. Also that 70 piston may be the correct match for your condensing unit. I don't have access to the Bryant/Carrier match charts. I suggest you talk to the installing dealer.
Nope piston was not changed. The carrier manual states 67 size for the compressor, the coil has a 70 in it per part number. The hvac guy never took the flared fitting off so I know he did not replace it (he just sweated the line to the bit of tube that was on the coil). The reason I am asking here is because the installer stated it was not an issue.
Grady
06-06-06, 09:20 PM
If the manual specs a 67, that is what should be in there. Call the installating company, ask that someone come out & change it. You should not have to pay for them doing this nor should they have to pull out the refrigerant. They should be able to pull the refrigerant back to the condensing unit & capture it there via the service valves, presuming there are valves on that particular condensing unit. A piston being too large could cause the compressor to be slugged with liquid refrigerant under certain conditons.