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The evaporator fan power input you see in the DX coil object is for calculating standard ratings (e.g., SEER or IEER). This input is not used during the simulation.

Coil:Cooling:DX:SingleSpeed,
  N5 , \field Rated Evaporator Fan Power Per Volume Flow Rate
  \note Enter the evaporator fan power per air volume flow rate at the rated test conditions.
  \note The test conditions vary external static pressure based on total cooling capacity.
  \note This value is only used to calculate Seasonal Energy Efficiency Ratio (SEER), Energy
  \note Efficiency Ratio (EER), Integrated Energy Efficiency Ratio (IEER), and the Standard
  \note Rating (Net) Cooling Capacity which will be outputs in the EnergyPlus eio file.
  \note This value is not used for modeling the evaporator fan during simulations.
  \type real
  \units W/(m3/s)
  \minimum 0.0
  \maximum 1250.0
  \default 773.3