Burnham K2WTC Installation, Operating And Service Instructions page 115

"Press"
Factory Setting Range / Choices
Central Heat,
No Priority,
Central Heat,
No Priority
Central Heat,
Optional Priority
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XIII. Operation
F. Changing Adjustable Parameters (continued)
button to adjust the system pump operation:
System Pump run pump for:
Activates the system pump output according to selected function.
Central Heat, No Priority:
Central heat, Optional
Priority:
Parameter and Description
Pump Runs during central heat, auxiliary heat and frost
protection call for heat. Pump does not start for a DHW call for
heat, but will run during Domestic Hot Water Priority if there is
also a call for space heat.
Pump Runs during central heat, auxiliary heat and frost
protection call for heat. Pump does not start for a DHW call for
heat and will be forced off if there is a DHW call for heat and
Domestic Hot Water Priority is active.
115