I am trying to start and stop a york max-e centrifugal chiller remotely via a BMS. Wiring diagram shows terminals 1, 7 and 8 on the I/O board. The control source on the optiview display is currently showing local. All I am doing with the terminals on the I/O board is closing a set of contacts on my BMS and sening the signal back. This seams to be digital to me. My York tech is telling me Analog. The wiring diagram says the chiller must be in remote mode, but remote is not a choice. The choices are local, digital, analog, and YSN. I think it should be digital. What do you guys think? I would like to trust my service guy but his explaination just seems wrong.