Hey all, looking for some assistance with some process chillers. I'm new to them and there doesnt seem to be any manufacture support as these particular machines aren't made anymore. Hard to believe since it was made in 1997. No model or serial number for the machine as a whole. It's a 404a system, Grasso open drive recip, M# RC69, Allen-Bradly controls. They have liquid level sensors, assuming controlling unloading, flooded evaporator, very large receivers. Need wiring diagrams and an IOM manual which states sequence of operation with all components in operation. Any help would be great.