I am faced with an outside unit change out following a failed compressor (original outdoor unit was a 2003 YORK ). My indoor unit is an Aug 2008 manufactured Payne PF1MNC031 (which was a replacement for the failed YORK indoor unit by the home warranty company in Sep 2008).
I have been given these two options by 2 different HVAC companies
1. A matched Payne 13 SEER outdoor R22 dry ship unit OR
2. Upgrade to a Carrier 13 SEER 25HBC330 comfort series unit with R410a after purging and flushing existing line set while keeping the same indoor unit after changing the TXV valve
Due to the cost of the R22 for option 1, the price difference is tolerable between the two.
I have read the posts about the risks of "oil mixing" and "higher pressure related coil failure" on this forum. I am unable to confirm if the Payne PF1MNC031 coil can handle the R410a (even though the HVAC salesperson was not concerned about it). The sticker on the unit states Refrigerant 22 DESIGN PSIG 300. Does this mean that it CANNOT handle anything greater than 300 psi thus excluding 410 upgrade? Switching both indoor and outdoor to 410a is not economically viable for us now.
Appreciate the input of the PROs. Thanks in advance.