I'm a Refrig and Burner tech, working at a plant type facility and am no expert on chillers, but we're having an issue regarding staging of 3 chillers, and I thought I'd post my question here to get your opinion. We have 3 York chillers, and the maintenance and repairs are done by York. The issue we have is that the way the units are setup, when there is a low load on the system, instead of running 1 chiller at 75%, they'll run all 3 at 25%, and when load is satisfied, all 3 shut down, then when there is a load again they'll start running again distributing the load across all 3, instead of having a lead/lag situation where 1 chiller carries the load until the next one is required, and so on. Before the chillers shut down when load is satisfied and when they startup, we hear a lot of surging and groaning from them. Despite having brought this up with the chiller techs several times, he keeps telling us this is normal, and that distributing the load across all 3 is the way they're supposed to run, but this still doesn't sound right to me. I've always been taught that running equipment in a constant low load situation isn't good, as well as the more frequent stop start situation this seems to cause. Any thoughts?