Stager Parameters; Functions Common To All Stager States; Drop-Stage Interstage Delay; Burner Demand - CleaverBrooks CFC Operation, Service & Parts Manual

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The stager has the following variables:
StagerState: encodes the current state of the stager.
StagerTimer: multipurpose 1 second timer used by states
which measure time.
StagerTimeLimit: the timeout value for the StagerTimer
LeadStartup: flag indicating the lead boiler is starting
AddStageA: the stage being added to those already firing

Stager Parameters

ADD-STAGE INTERSTAGE DELAY: MM:SS
This specifies the minimum time that the Stager waits after
adding one stage before adding another stage or dropping
a stage.
DROP-STAGE INTERSTAGE DELAY: MM:SS
This parameter specifies the minimum time that the Stager
waits after dropping one stage before dropping another
stage or adding a stage.

Functions common to all stager states

These functions handle overall burner demand responsibil-
ity, and take care of cleaning up any anomalous conditions.

BURNER DEMAND

The stager checks the Master's LL burner demand. If this
demand is off all slaves with SlaveStates of AddStage,
SuspendStage, or Firing are set to Available by the Rate
Allocator turning them all off and the StagerState is set to
be Idle.
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CB FALCON LEAD/LAG