what is the normal range of superheat?

[varela570]

ITS BEEN A WHILE SINCE IVE BEEN OUT IN THE FIELD AND IM FORGETTING THINGS. SO IF SOMEONE COULD HELP ME WITH THIS QUESTION.WHAT IS THE NORMAL RANGE OF SUPERHEAT?I THINK THE NOMINAL RANGE OF SUBCOOL WAS BETWEEN 10-15 DEGREES,RIGHT?

[fireye03]

what kind of m.d?
orfices/pistons varies with wb/db&ambient temp changes.
several things need to be looked at before you can determine correct s.h


[Edited by fireye03 on 02-24-2005 at 11:52 AM]

[wasp]

There is a superheat/subcooling calculator that I use to get a charge right on the money, involves taking temps and r/h readings. They also have an airflow section on them so you can get that perfect also. These are great for any application.

York and Carrier make these calculators (slide rule type actually).

Superheat can run as high as 25 and still have sufficient cooling to the compressor motor. On some old relics that I have worked on (semi hermetics 06d's, 5h40, 5f20's) I concentrate on a 15 degree superheat, that ensures no flood back and sufficient cooling to compressor motor (motor cooling not applicable to 5f and 5h series, open drives).

[ignitor eric]

15 superheat 10 degree subcool