Ed, the early vans just had the low and high side fittings right near
the compressor.  The SUC is the low side (suction) where you would
normally add refrigerant.  If you have a gauge set you can hook up both
and see what the high side is doing (I would recommend this to be sure
it is doing OK).  Let me know if you need any more parts or info.

Ken Wilford
John 3:16
www.vanagain.com

Ed Duntz wrote:
> I'm trying to get my a/c system working on my 1.9 Vanagon, using a conversion kit from Interdynamics. (I'd also like to try the same on my 2.1 eventually) My trouble is that the compressor seems to have two low-side connections a few inches out on the lines. I've compared this to my 2.1, which has one low-side fitting a few inches out on the line. I thought that I should have one low-side fitting near the compressor, and a high-side connection somewhere near the evaporator.
>
> One line says SUC (I'm assuming for suction) and one says DIS (I'm assuming for discharge) Does this mean that someone has installed the wrong fitting on one of the lines? Which side (suction or discharge) should the low-side (the one I'm adding the refrigerant to) be on?
>
> Thanks,
> Ed in CT
>
>