Hey I was wondering if anyone knew what the operating pressure of the high and low side of the AC system is supposed to be? I have access to a AC recharge/ recovery machine and manifold gauge set so I want to know what #'s to look for. Thanks!!
CHad

 

It depends on ambient temp. There is a pressure chart in the SM. Unless you have had HVAC training you can cause more harm than good.

 

I had the SM in my lap top but I just had my hard drive replaced due to a nasty virus.. I will get another copy of the SM and reference it in relation to where I am I guess. I have a ASE refrigerant recovery and recycling certification and am aware of the dangers involved. I just needed some reference #'s since my manual is gone. Speaking of ASE.. I got some more exams this week and next! Wish me luck!

 

You cannot go wrong with weighing in the charge.
Of course your next comment would be you dont have a digital scale.
Or do you?
If you dont your really guessing at this point.
Unless you use the superheat and subcooling method.
If your a HVAC guy you'll know what i mean if not, you need to weigh in the charge.

Marcus

 

There is a HVAC program at my school. Im sure they have the scales. Ill check emm out tommorow if I get a chance.

 

Dont forget to put the lines under a vacuum for about 2 hours after you pressure check it.

Good luck.

 

2 hours isn't required to remove all H2O vapor.

Is there something wrong with the AC you are trying to fix?

 

lol, well technically he has to put a micron gauge on the system and bring it down to 500 microns.
But chances are he doesnt have one, so 2 hours (to be safe) is enough in my eyes.

 

Most AC charging/recovery stations don't have a Micron gauge.

 

i know thats why i suggested 2 hours
Personally i left it on for 2 hours AND i have a micron gauge lol
Laziness.

Marcus