MPE SC2000 - Page 43

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FLOAT BACKUP EXAMPLE - Pump Down
Notes:
1. Pump Down Applications (Parameter P.19 = 1)
Two Float Backup - A simple two float backup system can be made using an Off float and a High float.
High Level Input - Closure of the Float Backup High Level input will cause all pumps to be called to run, provided the
Off float input is closed. The Discrete Input used for the High Level must be set on Function 38.
Low Level input - Closure of the Low Level input will disable all pump operation. When the Low Float input opens, a
delay prevents the immediate calling of the pumps. This delay is set on Parameter P37. The Discrete Input used for
the Low Level must be set on Function 32.
Float Type - For Pump Down applications the Off, 1
st
, 2
nd
, 3
rd
, 4
th
On, and High floats must be normally open float
switches that close as the level rises above the float. The Low Level float must close as the level drops below the
float.
2. Pump Up Applications (Parameter P.19 = 2)
Two Float Backup - A simple two float backup system can be made using an Off float and a Low float.
Low Level Input - Closure of the Float Backup Low Level input will cause all pumps to be called to run, provided the
Off float input is closed. The Discrete Input used for the Low Level must be set on Function 32.
High Level Input - Closure of the High Level Float Switch will disable all pump operation. When the High Float input
opens, a delay prevents the immediate calling of the pumps. This delay is set on Parameter P37. The Discrete Input
used for the High Level must be set on Function 38.
Float Type - For Pump Up applications the Low, Off, 1
st
, 2
nd
, 3
rd
and 4
th
On floats must be normally closed float
switches that close as the level drops below the float. The High Level float must close as the level rises above the
float.
3. The FAULT light comes on and Fault Code 16 is generated, when a pump is called to run by the Float Backup system.