Our customer supplies hot water from a heat exchanger to other users and charges them for kilowatt hours (kW.h) used. The customer supplied calculation to compile the macro was: The difference between water temperature out and water temperature returned x a factor x flow in liters per second. For flow rate in liters/min -> kW - Flowrate (1/m) / 60 x dT (C) x 4.190
-> kW - Flowrate (1/m) x dT (C) x 0.06983333

This application uses a Tiger 320 Series controller with RTD Frequency RTD input module and boiler energy calculation macro Version 1.3.

27_Boiler Energy Calculation Macro


  • View kW.
  • View flow rate.
  • Use a Tiger 320 Series DI-503 and view three parameters.