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78
Pump Duty
Description
4= Alternate duty backup
If a pump fails to meet the
demand (due to malfunction,
intake blockage etc.), then it is
stopped and another pump shall
take over. Each pump has its own
setpoints, (P2
1
3, 2
2
3, 2
3
3, 2
4
3,
2
5
3, 2
6
3, 273, 2
8
3, 2
9
3, 5
7
3 &
P2
1
4, 2
2
4, 2
3
4, 2
4
4, 2
5
4, 2
6
4,
2
7
4, 2
8
4, 2
9
4, 5
7
4). but each time
all pumps have stopped, then the
setpoints are sequentially rotated
between the pumps to ensure
equal pump use.
5= Duty backup and assist
First pump comes on, if it cannot
cope, it goes off and next pump
comes on (duty backup). This
continues until the last pump
comes on and if it cannot cope the
first pump comes back on to
assist the last pump (duty assist)
if the level continues to rise all
other pumps will come on (assist)
in turn until the level decreases to
the pump off points. Each pump
has its own setpoints, (P2
1
3, 2
2
3,
2
3
3, 2
4
3, 2
5
3, 2
6
3, 2
7
3, 2
8
3,
2
93
, 5
7
3 & P2
1
4, 2
2
4, 2
3
4, 2
4
4,
2
5
4,2
6
4, 2
7
4, 2
8
4, 2
9
4, 5
7
4).
Содержание QUANTUM3
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