air conditioning with existing pipe work may not be an issue 2013 R22,
R407C to R410A & R32
happens when refrigerant oil is mixed in air conditioning systems?
If a mineral oil was
to be used with R32, R407
the oil starts to solidify and stick to the side of the pipes and
orifices as the refrigerant breaks it down. This can be a problem in
long pipe runs where oil can get trapped in the undulations of the pipe
work installation. If installing a new R32 or R410A
air conditioning unit and the existing air conditioning pipe work was
used by a R407
air conditioning system then the pipe work theoretically can be used.
The oil is the same synthetic variant and if the installer was to blast
the pipe through with nitrogen to clear any residue of oil out of the
run then there would be no problem.
Saving to be made
when reusing air conditioning pipe work
When air conditioning companies are quoting there may be significant savings in not changing the pipe work especially on long pipe runs. There is a environmental issue in replacing pipe work and if it isn't unnecessary then why do so. If the pipe sizes are the same or larger by one size i.e if the new air conditioning units are 1/4 + 1/2 gauge pipe and the old system is 1/4 + 5/8 gauges then there will not be a problem but more refrigerant may need to be added. Any larger may not be advised. For complete peace of mind use Mitsubishi Electric Air Conditioning.
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UK: +44 (0)1234 841221
Last updated - 05/04/2019