Circulation Temperature Control
The macro "DHA_CircTempControl" provides control of the domestic hot water circulation temperature.
This macro should be used if a minimum circulation temperature is specified due to legal requirements, or in critical cases where this temperature might be lower than the minimum setpoint.
The macro measures the circulation temperature and compares it with the circulation temperature setpoint. When the measured value drops below the setpoint, the circulation pump speed will be increased. This function does not increase the domestic hot water setpoint if the circulation temperature is too low. When the setpoint cannot be reached in a pre-defined time, the macro generates an alarm.
The macro provides a 0...100% signal for the pump speed control or for a mixing valve. Use the variable fan speed control macro "FNB_ModFan" for the pump speed control.