View Full Version : 10-20-30-method explained a bit more
05-31-2004, 12:41 PM
In a previous post,cobitech suggested a method for charging units.This seems to be a great tip. I appreciate reading and learning things like that very much,as I am sure a lot of people are that use this forum. What I want to make sure of is by low temp does that refer to a freezer,medium temp a fridge or reach-in cooler or the like,and high temp maybe a flower case or similar?My thanks to whoever would like to clarify this for me.I want to be sure of what I pick up in this forum.Thanks again.
05-31-2004, 01:31 PM
I was hired by an HVAC Co. that referred to everything with evap. colder than AC as low temp. I was hired for my low temp. exp. refrigeration and icemakers. PS The more I read the less I know I know.
05-31-2004, 01:32 PM
low temp = 0* or lower
05-31-2004, 01:34 PM
med temp is meat cases , dairy cases...(above freezing)
05-31-2004, 02:27 PM
I hope this may help a little, I'm saying it like
selfemployed The more I read the less I know I know.
The application in which the suction pressure is in the range of 0-10 PSIG with an equivalent evapouration of -30 to -14 C .
Generally used for low-pressure applications like Deep freezer.
The application in which the suction pressure is in the range of 17 - 40 PSIG with an equivalent evapouration of -15 to +15 C .
Generally used for low-pressure applications like bottle coolers.
The application in which the suction pressure is in the range of 25 - 55 PSIG in R-12 / R- 134a and +25 to 95 in R-22 with an equivalent evapouration of - 6.7 to -+12.8 C.
Powered by vBulletin® Version 4.2.0 Copyright © 2013 vBulletin Solutions, Inc. All rights reserved.