CleaverBrooks CFC-500 Operation, Service And Parts Manual page 179

Parameter
XX pump start delay
XX pump overrun time
XX pump cycles
Pump Exercising
Each of the pumps (A, B, and C) will have an exercise timer
that helps to ensure that pumps do not "freeze up" due to long
periods of no use. However, this is active only if the pump is
attached to some function: a pump output that is not attached
is not exercised.
Parameter
Pump Exercise Interval (Days)
Pump Exercise Time
Frost Protection Requests
The frost protection requests are set or cleared to match the
status generated by the frost protection detection functions for
each Falcon.
Firing For Local Frost Protection
This tells the LL master that although the burner is firing
independently, it is doing so for frost protection and thus is still
available as a lead/lag slave. This will be when 1) frost
Table 29. Pump Control Block Parameters. (Continued)
mm:ss
When the pump demand changes from off to on, this delay time is used to delay the start of
the pump. The pump then starts after the delay expires, assuming that the demand is still
present.
A delay time of zero disables the delay.
For a stand-alone (non-slave) Falcon, this delay is skipped and does not occur if it is already
firing when the pump demand off-to-on event occurs.
For a Falcon in slave mode, this delay is skipped and does not occur if the "Master Service
Status" (defined in the LL specification and noted in the drawing) informs the slave unit that
some slave burner in the system is already firing, when the pump demand off-to-on event
occurs.
mm:ss
This time indicates how long the pump should remain on after pump demand ends.
A time of zero disables the overrun.
However, a pump should overrun to use up the last of the heat only if it is the last pump
running.
Therefore: For a stand-alone Falcon if any local service is active then this status cancels any
overrun that is in-progress.
For a slave Falcon if any master service is active at this time this status cancels any overrun
that is in-progress.
0–999,999
The XX pump cycle counters are mapped to the physical cycle counters; there is one counter
for each of the three physical pump outputs and this counter is visible via this parameter, for
whichever pump block (or blocks) are connected to it via the block's XX pump output
parameter. It is possible for two (or more) pump functions to be assigned to the same
physical pump. In this case, that physical pump's cycle counter is visible in each pump
control block. A pump cycle counter has the range 0 through 999,999 and it can be restarted
if a pump is replaced.
Table 30. Pump Exercising Parameters.
0, or N
If set to zero, the exercise function is disabled. Otherwise this parameter provides the interval
time between exercising the pumps. It is common to all three pump outputs (A, B, and C).
MM:SS
If the time is zero then the exercise function is disabled. Otherwise this parameter provides
the time that a pump should be on when it is exercised. It is common to all three pump
outputs (A, B, and C).
Comment
For pumps that are attached, whenever the pump is off, a timer
will measure the pump-off time. When the day counter reaches
the value provided by the Pump Exercise Interval (Days)
parameter, then the pump will be turned on for the time given
by the Pump Exercise Time parameter.
Whenever the pump is on, for any reason, the counter is set to
zero to begin a new measurement.
Comment
protection is controlling the Falcon per the priority scheme
(which occurs only if frost protection is enabled), and 2) burner
demand is true and the burner is currently firing or preparing to
fire to serve that demand. Otherwise it will be clear.
Pump X, Y, and Z
The pumps of the Slave can be used by the Master control.
The pump X, Y, and Z utilize the pump connections A, B, C of a
specified slave.
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