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Operating information
OPERATION
DISPLAY
6. If flame is detected, it holds the firing rate steady for a few
seconds to let the flame stabilize, then it begins to modulate the
firing rate based on a set point or some other command.
7. If the space heating call for heat is active and the combi flow
switch starts a DHW call for heat, the diverter valve will move to
the DHW position and the boiler will switch to the DHW Mode.
This will divert the boiler's outlet water from the heating system to
the brazed plate heat exchanger. The control will then modulate
to maintain the DHW outlet temperature at the DHW set point.
8. Once all calls for heat are satisfied, the control will turn off
the burner. The blower will continue to run during the postpurge
period.
9. Any pumps that are running will continue to run for their
respective pump delay times before turning off. A 60 second
anti-cycle period will start, which will delay any new space
heating call for heat until it times out.
10. In Standby, ready to start a new cycle.
Installation & Service Manual
F I R E T U B E C O M B I
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