I have a Carrier 19 DH that is going to be mine. My centrifugal is limited to turbo core compressors. I'm going to be firing up a 19DH after it has not run for a year or so due to operator knowledge (my customers).
We are cleaning the condenser (punching the tubes) then going to restart the machine. There is a concern that it may be low on charge (R-11). My PT chart tells me it will run in a vacuum on the suction side and low pressure on the discharge side. In my 12 years as a tech I have mostly worked with 22 ranged pressures. So never having had to check for leaks on a system like this (low pressure) will the normal methods I use for R22 be OK?
I have the IOM for this chiller, What other material I can read to get me better prepared for this style machine?
If there is more info needed, or you would rather not post it here, I can PM you my cell or I could call you. Up to you.