www.techsys.com.au
Version 1.3 11/12/11
7
C o r p o r a t io n
System Operation
The operating constraints for the system are detailed below.
Single Level Mode
When the system level rises above the System Cut In Level the controller will start the
first pump. If one pump cannot satisfy the level requirement another pump will start after
the IN delay timer has timed out (Single Level Mode) and the system level remains above
the Cut Out level. More pumps will be started until there are no further pumps available or
the system level drops below the Cut Out Level. If at any time the level drops below the
Cut Out Level then the OUT delay timer (Single Level Mode) is started and when it times
out a pump will be turned off (Providing the minimum run time for that pump has also
timed out). Multilevel Mode utilises individual cut in / out level for each pump.
Multilevel Mode
Out Delay
In Delay
Pump 1
off
Pump 2
off
Pump 2
on
Pump 1
on
Pump 1
on
Low
Level
Shutdow
n
High
Level
Shutdow
n
L
E
V
E
L
Pump 3
on
Pump 3
off
PUMP CUT
OUT
PUMP CUT
IN
TIME
LE
V
E
L
Cut In Level 1
Cut In Level 2
Cut In Level 3
Cut Out Level 3
Cut Out Level 2
Cut Out Level 1
Low Level Alarm or Shut Down
High Level Alarm or Shut
own
In Delay
Out Delay
