Not a problem I don't think. How much is a little?
Brian

--
----- --
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
"Cynic" wrote in message
...
I've been online reading up a bit about air conditioning after seeing a
neighbour having it fitted. I notice some installation manuals stress the
need for the pipework to be nitrogen purged and pressure tested then a
full(ish) vacuum be drawn before introducing the refrigerant. Other sources
don't seem to mention this. Is a small proportion of nitrogen in the system
a serious defect and what would it's effect be during operation?