View Full Version : R134a

19-03-2006, 11:44 PM

I have a small cooling system with a display case and 3 small storage cabinets, its charged with R134a and has a LŽunite hermetique compressor.
What is the ideal suction and discharge pressure for the R134a?
it has a water cooled condenser.

I have been told to run it at about 1 bar lp and 8 bar hp, is that correct?


20-03-2006, 02:33 PM
Condensing pressure depends on water temperature, and evaporating temperature depends on case setpoint.

old gas bottle
20-03-2006, 08:24 PM
does not sound far out though,high pressure sides a bit low is it over condensing,ie too much water, is the liquid line too cold, mind you if its working o/k who cares !

10-04-2006, 08:17 AM
Sounds good. Low head pressures are always a good thing.
When you say bar. are you talking gauge pessures or absolute????????????
I'm guessing gauge or you have a dam good compressor.