Only the return line should have to come back. A 2nd evaporator set up
may require a larger compressor and more condenser capacity. You also
need solenoids and controls for when you only want to run one. Two sets
of evaporator fans may also require a larger alternator and definitely
improved wiring from the existing. Simply adding a second AC may result
in disappointment.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
Of Christopher Gronski
Sent: Wednesday, June 15, 2005 6:16 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Question adding BEHR front AC to existing rear AC

I am bringing my van in to a local VW shop to convert from R12,
replace the compressor (there is one leak in the system at the
compressor - but that is getting replaced anyway). The shop indicated
that they'll have to have some AC lines fabricated as part of the
install, which leaves me wondering...

The existing AC system goes from compressor in the rear to condensor
in the front then back to an evaporator in the rear. Since the BEHR
unit has its own internal evaporator wouldn't the AC line just T off
of the existing lines coming out of the evaporator? Is there any
reason that new lines would need to be run back to the compressor?

Thoughts?
Chris