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Can I install a R419a condenser with an R-22 evaporator?

Customer Question
Customer: ***** *****: Can...
Customer: ***** *****: Can I install a R419a condenser with an R-22 evaporator?
JA: Thanks. Can you give me any more details about your issue?
Customer: I have a 10 year old R-22 evaporator and would like to replace the outside condensing unit with a new R410A unit. Is that recommended and will it work right if I do it?
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Submitted: 2 years ago.Category: HVAC
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Answered in 8 minutes by:
12/21/2015
HVAC Technician: Phil, Mechanical Engineer replied 2 years ago
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6,938
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial
Verified

Hello, you can do it, but the R-22 coil will be leak prone, especially if its older. R 410a runs at roughly twice the pressure that R-22 does,

You will also have to flush any of the mineral oil from the R22 evaporator, mineral oil tends to form clots when mixed with the oil used in R410a systems (POE, Polyol Ester Oil, an organic oil). You can buy a refrigerant flush kit from your local refrigeration wholesaler.

You will also need to change the refrigerant metering device to match your R410a system.

If you appreciate my input so far, locate the "rate your expert" link, and rate my work positively... we can go from there.

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