Originally Posted by durbin
I had a friend come over with gauges and r-12. He works a a boat yard and recharges units all summer. He said that he can not charge the unit because he can't find the lowside valve. On the armstrong tr22-12 unit there is a high side valve on the left rear, but we can not find a low side valve. If anyone knows how to charge this unit or has a good diagram for this unit and the wiring. I would love to see them. I contacted Armstrong via email and guess what they do not have any documatation for this unit. So as you would say it I am up $#@%s creek without paddles.
thanks for all the help
There are many things wrong with your post.
R-12 was used in automobiles, not Airstreams.
Armstrong always installed low-side ports because that is the only port necessary to charge a system.
You trolled in another post this morning that both the high side and low side ports are necessary to charge a system (contrary to Andy's (aka Mr. Airstream
) post. But you did not explain your reasoning.
But the kicker is that Armstrong Furnace Company went out of business so long ago that Google has never even heard of them. There is no way that you could have swapped email