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Model BB4000 Controller Instruction Manual
8.4. On Generator - Function 7
In cases where the Emergency Generator is not sized large enough to run all the available
pumps, closing a Discrete Input programmed for “On Generator” will limit the number of
pumps called to run to the number preset using Parameter P.15. Typically contacts from the
Transfer Switch are connected to this input.
8.5. All Pump Disable - Function 8
When a Discrete Input programmed for “All Pump Disable” is closed, all the pumps are dis
-
abled (not allowed to run), the Fault indicator will come on, the Power indicator will flash, and
Fault Code 18 will be generated. This Function also disables pump operation from Float Back-
up using Functions 32 - 38, or Level Probe Backup using Parameters b.01 - b.07. The Discrete
Input is typically connected to Phase Monitor contacts.
When the Discrete Input opens, the Lag Pump Delay must expire before the first pump is allowed
to run. If any additional pumps are required, the Lag Pump Delay must expire between each
one called to run.
8.6. Sequence Input 1 (2, 3, 4) - Functions 9 - 12
When a Discrete Input programmed as a “Sequence Input 1 (2, 3, 4)” is closed, it disables
normal alternation and forces one of the pumps to always be lead pump. For example, closing
“Sequence Input 1” forces pump 1 to be lead and sets the sequence of 1 - 2 - 3 - 4 (assuming
Parameter P.16 = 1). See page 50 for connection diagrams.
8.7. Call Pump 1 (2, 3, 4) Last - Functions
When a Discrete Input programmed for “Call Pump 1 (2, 3, 4) Last” is closed, it assigns the
respective pump to standby status where it will always be called to run last.
If more than one, but not all, of the pumps are assigned to standby status, they will all be avail-
able to run if needed, but in a fixed order, and always after the pumps not assigned standby
status.
If all the pumps are assigned to standby status, then alternation will occur normally, as though
none of them were assigned standby status.
8.8. Low Level Alarm - Function 17
When a Discrete Input programmed for “Low Level Alarm” is closed, the Low Level indicator will
come on and the Low Level Alarm relay contacts will close. This Function is for alarm and indi-
cation only and will not disable pump operation. Also see Function 32.