Currently replacing a chiller barrel (25 yrs old) on a continental 10 ton water cooled chiller (converted to air cooled some yrs ago) providing water to three air handlers in a one story building. It had corroded causing water and refrigerant mix (killed the compressor of course). While talking to the maintenance supervisor who handles all the equptment in the building except this unit, we decided that refrigerant in the water would cause a rise in pressure. The system is not running but gauges show 60 psi in the water system. The super says that the psi should be no higher than 10 psi. That sounded low to me. What say you. I'll be calling continental direct, but thought I'd put it out there to see what the pros have to say.
Also any suggestions on purging the water from the refrig lines? There are no access points at the rooftop condensor. We blew the lines with nitro until there was no apparent water coming out. Have been running a 5cfm pump for two days and am getting tired of babysitting it. Any suggestions?