122
A p p e n d i x I
In addition to the floats described above, a discrete system has the option of using a Low float and a High float as a backup
and alarm system. The behavior of the pumps depends on the pumping mode - pump down mode (used to empty a well)
or pump up mode (used to fill a tank).
To use High and/or Low floats as a backup and alarm system, the floats must be wired to the corresponding input on the
TCU and the Low Float and/or High Float option must be enabled in the TCU.
To prevent the pumps from short cycling on a High float condition, minimum run and off times can be configured for the
pumps. The same pump timer rules apply to the Low float. In the event of a High and Low float condition at the same time,
the high float condition takes precedence and pumps will continue to run until the high float condition clears.
TCU Settings (Discrete System)
Name
Setting
Description
For more information, see...
Transducer Type
Floats
Select floats for a discrete system.
page 52
Number of Pumps
1, 2, or 3
Select the number of pumps at the
station.
page 52
Low Float
Enabled or Disabled Enable this setting to use a low level
float to override normal pump control if
a transducer fault occurs.
page 54
High Float
Enabled or Disabled Enable this setting to use a high level
float to override normal pump control if
a transducer fault occurs.
page 54
High Float Override Enabled or Disabled Enable this setting to give the High float
precedence in the event of an Off float
failure when the TCU is in Floats fault
mode.
page 54
Minimum Run
1.0
Minimum time pumps should run. Used
to prevent short cycling.
page 52
Minimum Off
0.5
Minimum time pumps should remain
off. Used to prevent short cycling.
page 52
Response to Fault Conditions (Discrete System)
Fault(s)
Alarms
Pump Operation
Behavior
High float condition High well alarm
All pumps on
A high well alarm is generated. All pumps are
staggered on. When the high float turns off,
the high well alarm clears and normal pump
operation resumes.
Содержание TCU800
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Страница 49: ...39 S e t u p Externally Powered Non submersible Transducer TCU Powered Non submersible Transducer ...
Страница 56: ...46 C h a p t e r 5 Quick View Analog View Pump Statistics ...
Страница 57: ...47 U s e r I n t e r f a c e Alarms Settings Screen 1 Settings Screen 2 ...
Страница 58: ...48 C h a p t e r 5 Advanced Settings About ...
Страница 77: ...67 O p e r a t i n g P r o c e d u r e s TCU Installed in Existing Control Panel ...
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Страница 162: ...Data Flow Systems Inc 605 N John Rodes Blvd Melbourne Florida 32934 321 259 5009 www dataflowsys com ...