Automotive Air Conditioning Information Forum (Archives)

Provided by

We've updated our forums!
Click here to visit the new forum

Archive Home

Search Auto AC Forum Archives

condenser orientation

scooterk on Mon April 20, 2009 10:46 PM User is offline

Year: 1977
Make: Porsche
Model: 911
Engine Size: 2.7
Refrigerant Type: 134a

Does a PF condenser have to be mounted with the entry/exit fittings horizontal? I'm adding an aux condenser w/fan in my fender. The one I ordered will only fit if the fittings are vertical. When I measured for the condenser, I didn't take into consideration the hose fittings.



TRB on Mon April 20, 2009 11:09 PM User is offlineView users profile

It will work but it is not recommended. I personally think you lose a little performance when doing this. How much, that's open for debate as I have never tested it.


When considering your next auto A/C purchase, please consider the site that supports you:

mk378 on Tue April 21, 2009 9:06 AM User is offline

Parallel flow condensers depend on gravity for best performance. The idea is that already-condensed liquid refrigerant will drop to the bottom of the side header and flow through the bottom tube in each group. This keeps it out of the way of the condensation process in the other tubes.

HECAT on Tue April 21, 2009 10:26 AM User is offline

Gravity is always best to work with, than to fight against; but sometimes we do. Given the higher pressure environment of a condenser, the gas to liquid phase change will occur from the adequate removal of heat, regardless of port orientation.


HECAT: You support the Forum when you consider for your a/c parts.


scooterk on Mon April 27, 2009 11:16 PM User is offline

Thanks for the help. Installed the condenser with the inlet and outlet pointing down. That worked best with the hose layout.

I've got the system completely installed and it's blowing 40 degree air driving down the road (54 degree air setting still), that's COOL compared to no air at all!! I think there's more potential though.

I'm getting some crazy gauge readings. Low side 35 to 45, high side around 55 - 60.

I've installed a new Sanden 507 compressor, all new barrier hoses (approx 33'), a 12 x 14 condenser in the left rear fender w/fan, a 14 x 14 condenser in the left rear fender w/fan, a 9 x 27 condenser in the rear deck lid, new dryer, new expansion valve and new blower motor. Everything new except the evaporator, three speed blower switch and thermostat. Using HC 12a - Duracool coolant( approx 3.75- 6oz cans).

Anyone got any ideas for the wacky gauge readings? I'm taking the readings from the R-12 fittings located in the top of the compressor. I did not install gauge ports in the hoses, now I'm wishing I had.

Thanks for any help,

FishFinger on Thu April 30, 2009 2:54 PM User is offline

To save starting another thread, does this apply to serpentine condensers too? Can I fit it upside down?

mk378 on Thu April 30, 2009 3:13 PM User is offline

As much as possible, condensers should always be plumbed so the gas from the compressor goes in at the top and liquid out at the bottom. A serpentine wouldn't care though if the direction of flow is reverse from originally intended (i.e. mount it upside down, and swap the lines to compensate) if that's what you're asking.

FishFinger on Thu April 30, 2009 4:54 PM User is offline

I was think more like having the line from the compressor at the bottom, and the liquid line at the top. Space is very tight and it saves using some very awkward pipe runs.

Back to Automotive Air Conditioning Forum

We've updated our forums!
Click here to visit the new forum

Archive Home

Copyright © 2016 Arizona Mobile Air Inc.