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Model BB4000 Controller Instruction Manual
5.4. Alternator Sequence Mode - Parameter P.16
This Parameter is provided to allow the Controller to accommodate a variety of special
sequence requirements.
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arameter
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efault
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etting
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efinitionS
P.16
1
Alternator Sequence Mode
1 = Standard Alternation See Page 15.
2 = Pump 1 Always Lead - Stays On With Other Pumps See Page 15.
3 = Pump 1 Always Lead - Turns Off With Other Pumps See Page 16.
4 = Split Alternation - Pumps 1&2, and Pumps 3&4 See Page 16.
5 = Fixed Sequence Pump - 1 Always Lead See Page 17.
6 = Stepped On/Off - Only One Pump Runs at a Time See Page 17.
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6.1. Pump Stop Mode - Parameter P.17
This Parameter establishes which pump is the next one to be stopped, when there are two or
more pumps on.
The Controller has a corresponding “Pump Off Level” setting for each of the “Pump On Level”
settings. For the “Pump Stop Mode” feature to operate, the “Pump Off Level” settings must be
set on different levels. If all the “Pump Off Level” settings are set on the same level it does not
matter what Parameter P.17 is set on.
First On Last Off
- In this mode, as the level reaches one of the “Pump Off Level” settings, the
pump that was most recently turned on is turned off, leaving the one that was called to run first
still running.
First on First Off
- In this mode, as the level reaches one of the “Pump Off Level” settings, the
pump that was most recently turned on is left on and the pump that has been on the longest is
turned off. This results in a longer cool down period for each pump between starts. This mode
works the best in stations where one pump is required to run for a long period of time, with an
occasional need for an additional pump.
P
arameter
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efault
V
alue
S
etting
D
efinitionS
P.17
2
Pump Stop Mode 1 = First On Last Off 2 = First On First Off