Quote Originally Posted by beshvac View Post
The bristol I found like that had the same amps in either stage.
It could be that instead there's a busted discharge valve on the second cylinder. Either way the second piston doesn't seem to be providing any refrigeration effect.

If any of you pros don't have or have access to a psychrometric program or calculator, then you should think about locating one. It'll save a lot of head scratching. I have one posted in the educational forums, and there are several psychrometric apps available from itunes and the android market. You could also just use a wet bulb/enthalpy table and the total capacity formula

btuh total = 4.5 x cfm x ΔH