View Full Version : old R410a pipework with a new R32 split

15-05-2017, 12:36 PM
Hi, I've got a dead MHI split on R410a, can i use install a new R32 split onto the pipework without using a flushing agent? New Fuj is same size. Pipe is buried in a wall. Fault was fan motor and PCB not burn out. My quote will be nuts is a need to replace the pipe! Cheers

15-05-2017, 12:56 PM
Dry nitrogen first and then use the same tubes ......

install monkey
15-05-2017, 08:08 PM
same pipework if its a 410a system

16-05-2017, 04:10 AM
I wouldn't have an issue with it. I call it "rounding the corners" not "cutting the corners"

Needs must.

16-05-2017, 12:43 PM
I know the pipe size etc is good, i'm thinking oil problems?

16-05-2017, 03:11 PM
As mentioned above, dry nitrogen purge to remove any remaining oil etc. As R410A is made up of 50% R32, there should not be an oil compatibility or return problem.

27-06-2017, 12:38 PM
Blast it out with nitro and it'll be fine.
If it's not a burn out, your pretty safe.
Mhi 410 models run polyolester oil, I'm certain Fujitsu r32 is the same.