My Girlfriend's Superheat

[summerblues]

Hi

where can I find a generic superheat chart,

my fixed orifice, using interior wet bulb and outside DB temps.

[rohalon]

google would probly be easiest

[ARPA]

summerblues:

I deleted your other two posts. Please read the rules about multiple postings.
Click on the link in my signature line.

[jrbenny]

http://hvac-talk.com/vbb/showthread.php?t=21500

[tpa-fl]

Are you looking to check your girlfriend's superheat or her air conditioning's superheat? The tools needed for each job are quite different in nature.

[dan sw fl]

Are you looking to check your girlfriend's superheat or her air conditioning's superheat?

The tools needed for each job are quite different in nature.


Camera and Refrigerant Gauges will determine
extent of superheat in each sight review.

[summerblues]

actualy the reason I need a generic chart for superheat curves is that I have mismatched coils in residential units so superheat is the only way to acurately measure the charge, am I correct ?

[skpkey9]

Hope this helps.

[summerblues]

Thank you for the chart but why do other charts insist on return air wet bulb ?

or some books say that for fixed orifice you need to measure wet bulb at the return ?

seome articles say use wt bulb if humidity is over 65 %

mystery,

[HPLearner]

Are you looking to check your girlfriend's superheat or her air conditioning's superheat? The tools needed for each job are quite different in nature.

:D :D And remember, HOs, to always call a professional first!

[summerblues]

You Nary Bugger, You Mock ME,

Nay you shall see the vengence of my wrath,

[HPLearner]

You Nary Bugger, You Mock ME,

Nay you shall see the vengence of my wrath,

Your pardon, sir, a jest only, no offense meant. but isn't subcool a more reliable way of checking your charge?

[skpkey9]

subcool measurement is only used in TEV systems or to aid in diagnosing a restriction.

[summerblues]

I'm checking fixed orifice units,residential units so I assume superheat is the best way,

also the ambient temp now is a bit too low most likely I should wait
until the outdoor temp is about *% or more, would this be a good tactic ?

Thanks

[summerblues]

I ment 85 degrees or more

[skpkey9]

Answer to your question is simply different prefrences.

[skpkey9]

In cooler temps you can block off condenser venturi to bring up head pressure other than that just go by chart and you should be fine.

[skpkey9]

And Yes, fixed orifaces you use superheat to charge.

[summerblues]

Thanks

[jrbenny]

You should read the article in the link that I provided.

[HPLearner]

Superheat chart by Jim Wheeler previously posted by Bald loonie, via the "Boss".

In Excel - http://www.hvaccomputer.com/hvactalk...WHEELER_CHARGING_CHART
.xls (http://www.hvaccomputer.com/hvactalk...WHEELER_CHARGING_CHART.xls)

Hope this helps

[jrbenny]

That's what I linked. However, there's also a lengthy article in the link that explains the charging chart.

[rogerk]

Thank you for the chart but why do other charts insist on return air wet bulb ?

or some books say that for fixed orifice you need to measure wet bulb at the return ?

seome articles say use wt bulb if humidity is over 65 %

mystery,
Some charts use the wet bulb temp as you can have the same dry bulb temp, and still have 2 different wet bulb temps. The wet bulb temp is the measurement of the moisture in the air. More moisture = less wet bulb dry bulb differnece. Less moisture = more wet bulb dry bulb difference . I think thats right.