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Form the SDK documentation, if use addDemandBranchForComponent method, it will create a new ControllerWaterCoil if hvacComponent is a CoilCoolingWater or a CoilHeatingWater.

so from openstudio, should be like this:

however, when I add heating water coils to loop by this ruby scripts:

coils = model.getCoilHeatingWaters
plant = model.getPlantLoopByName('Hot Water Loop')
coils.each do |coil|
   plant.addDemandBranchForComponent(coil)
end

there is no controller in openstudio:

so any suggestions? Thanks!!!!!

Form From the SDK documentation, if use addDemandBranchForComponent method, it will create a new ControllerWaterCoil ControllerWaterCoil if hvacComponent hvacComponent is a CoilCoolingWater CoilCoolingWater or a CoilHeatingWater.CoilHeatingWater.

so So from openstudio, OpenStudio, should be like this:

coils = model.getCoilHeatingWaters
plant = model.getPlantLoopByName('Hot Water Loop')
coils.each do |coil|
   plant.addDemandBranchForComponent(coil)
end

From the SDK documentation, if use addDemandBranchForComponent method, it will create a new ControllerWaterCoil if hvacComponent is a CoilCoolingWater or a CoilHeatingWater.

So from OpenStudio, should be like this:

however, when I add heating water coils to loop by this ruby script:

coils = model.getCoilHeatingWaters
plant = model.getPlantLoopByName('Hot Water Loop')
coils.each do |coil|
   plant.addDemandBranchForComponent(coil)
end

there is no controller in OpenStudio:

So any suggestions?