410a/r22 Chart

johnjohn89

Does Anyone know where I can found 
410a/r22 pressure  compare to outdoor ambient temperature chart?

mattmia2

what do you mean compart to ambient?

you can find charts that show the boiling point at various pressures but the suction and discharge pressures will vary depending on the load on the system and the design of the system. you need to measure subcooling or superheat to measure the chare depending on the type of metering device.

STEVEusaPA

Airflow first before worrying about pressures.

HVACNUT

It was literally the first thing on a Google search. 

ratio

The Danfoss Ref Tools app has a nice refrigerant slider that is basically a P/T chart for lots of refrigerants. I use it occasionally.

STEVEusaPA

HVACNUT said:

It was literally the first thing on a Google search. 

Might not be what he's looking for. Google 'Approach method' or "Checking the Charge without gauges".
Combined with the other post, putting gauges on the equipment should not be the first thing you do. Airflow is first.
Download the measurequick app. You can do many of the diagnosis for free. Advanced features and printable/email results cost a few bucks, but you can get pretty good idea for troubleshooting.

I'm still working on my 'Approach Method' app or I'd share it.

johnjohn89

HVACNUT said:

It was literally the first thing on a Google search. 

Thanks but I am not looking for pt chart

johnjohn89

@all thanks guys Iam not looking for pt chart

ratio

Huh. What are you looking for then?

johnjohn89

ratio said:

Huh. What are you looking for then?

For example! R410a at embient temperature 100 degree, head pressure should be around
375 to 400 psi ! Thats what am I looking for something like that chat?

johnjohn89

@allFor example! R410a at embient temperature 100 degree, head pressure should be around
375 to 400 psi ! Thats what am I looking for something like that chat?
Iam look for chart for head pressure and suction pressure compare to different ambient temperature.

RPK

https://hvacrschool.com/tag/ctoa/

pecmsg

johnjohn89 said:

@allFor example! R410a at embient temperature 100 degree, head pressure should be around
375 to 400 psi ! Thats what am I looking for something like that chat?
Iam look for chart for head pressure and suction pressure compare to different ambient temperature.

You need to measure Super Heat and Subcooling, along with air flow.

johnjohn89

@all thanks everyone!

pedmec

head pressure above ambient depends on the seer rating of unit. the higher the seer rating the lower the head pressure above ambient.

EBEBRATT-Ed

people say add 40 psi to temp at ambient that is a rough rule of thumb not to be relied on.

ChrisJ

EBEBRATT-Ed said:

people say add 40 psi to temp at ambient that is a rough rule of thumb not to be relied on.

I agree with pedmec.
I've seen lower seer units running the liquid line hot while higher seer units it's barely above ambient, so little you almost can't tell by hand.