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Old 02-12-2010, 06:52 AM   #1859
Join Date: Nov 2008
Posts: 1,690
I got another question.

Assume that I use back the old piping for the new R410A air con and later the old pipe spoil.

Can I then ask the contractor to install new piping which is not hidden (ie it is installed on the walls) for the aircon?

Sorry if this is a stupid question.

Yes sure the contactor can reuse back the existing pipe.
But make sure the contractor have to cleaning and purging for while to cleaning old stick oily base.
To be safe your new runing R410A gas.
If not do that for a short term can hear the compressor runing noisy and un smoothly at all.
It is mix with both gas become chemical reaction.
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