Convert Refrigerant tons to lbs

[Powerman81]

Hi,

I have chiller that has 752 tons capacity. How can I determine the mass of R12 refrigerant the chiller is charged with.

Thanks

 

[MintJulep]

Look at the nameplate or commissioning records.

 

[chicopee]

From the two values you gave, you can't. Tables are published about the theoretical performance based on one ton (2000 btu/hr) of refrigeration by Dupont but these tables will not give you the mass value but will have the refrigerant circulation in lbm/min. Best bet is to get the manufacturers design specs. on your system.

 

[Powerman81]

After carefully reviewing the VM I found the refrigerant charging value in LBs. It is a very old manual and the information was embedded.

Thanks all

 

[chicopee]

Powerman81, is your information based on a particular design and manufacturer?

 

[VerneE]

Where are you getting the R12 to charge it or what are you doing with the existing R12?

Are you replacing it with R-134a or R-409A?