Came across a Skymark (JCI) heat pump in a highrise building which seems to be giving me odd readings. Its a 2 ton chasis/cabinet unit. with water cooled condenser (from cooling tower)
Found unit with shot compressor, so we replaced it with a new compressor. Checked for leaks and tested ok.
After vacuuming it down to about 400 microns we added freon as per mfg specs. We noticied that the txv valve was freezing up and the evaporator was not getting cold at all. Low side pressures were about 20-30psi and high side was at 200psi. Compressor keeps cutting out after 2-3 minutes on high pressure. tried to add more freon but still nothing.
Could it be a dirty txv valve? or dirty water cooled condenser?
what is the best way to clean water cooled condenser heat pumps?