Guys, sorry if I am bringing up an already discussed subject.
We are having some problems with a retrofit that we are doing (R22 to R422D) on a Water Cooled Chiller.

Major problem were are up agianst is that they are bespoke units, they were originally manufactured by AMP with AMP compressors and heat exchangers.
Problem is that YORK retrofitted this chiller to YORK JG style Recip compressors and a Danfoss DanBus control system with an ISN building controller as the control interface for the chiller.

I am wondering whether anyone has any manuals or information on the AMP heat exchangers, we have 1 shell and tupe evaporator (approx 750 to 900kW) and three shell and tube condensers.

Any information or help will be gratfully appreciated.