Is it OK to keep the existing A/C evap. coil for R-410A with the new condensing unit?

Question

My home has a split A/C system. The condensing unit is outside and the furnace and evap coil is inside the house. The evap coil was replaced on March 2008 with Trane model # 2TXCC049BC3HCAA. I need to replace the condensing unit with a new Trane unit model # 4TRR3048A100A that uses R-410A refrigerant. My existing system uses R-22.

My question is: Is it OK to keep the existing evap. coil for R-410A with the new condensing unit? What problems might occur if I do this?

Answer 1

NO NO NO, the oil from an R-22 system does not mix with the R-410 System.R-22 is low pressure refrigerant and R-410 is a high pressure refrigerant, The metering device in the R-22 coil will not work with the R-410 system. Put in A R-22 condenser or change out the whole system!

Answer 2

The coils are not compatible with those gases.