Controller Water coil configuration

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The sensor is the coil outlet air node temperature and the actuator is the coil water-side inlet node. The set point manager would be placed at the outlet node of the coil.

Controller:WaterCoil,
  Central Cooling Coil Contoller 1,  !- Name
  Temperature,             !- Control Variable
  Reverse,                 !- Action
  FLOW,                    !- Actuator Variable
  Main Cooling Coil 1 Outlet Node,  !- Sensor Node Name
  Main Cooling Coil 1 Water Inlet Node,  !- Actuator Node Name
  0.002,                   !- Controller Convergence Tolerance {deltaC}
  autosize,                !- Maximum Actuated Flow {m3/s}
  0.0;                     !- Minimum Actuated Flow {m3/s}