The BOB_ModBoiler macro provides modulating control of the boiler burner and a setpoint output for external boiler controllers. The macro can be used for standalone and multiple boilers always in combination with the heating control strategy macro.
A boiler macro cannot be used without a heating strategy macro.
The boiler has different start and stop procedure depending on the configurations for large and small water volume and the return temperature control mode.
When a boiler stage switches on it starts its minimum on time and the blocking time to switch on the next stage or boiler.
When a boiler stage switches off it starts its minimum off time and the blocking time to switch off the next stage or boiler.
The macro also controls the boiler pump and valve.
If you need status and alarm inputs for the pump, you have to add an extra pump macro and connect the pump datapoint to both macro outputs. The pump command macro also provides pump exercise.
All the communication signals with other heat generators and the heating strategy will be connected automatically via global registers. The user has the option to assign a heat generator to three heat generator groups with different sequences depending on outside air temperature or a manual switch.