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Chapter 11: Testing
to make sure they are all functioning. Have the system go through
a complete automated control cycle of your system to confirm that
the unit and its programming are operating as intended.
Pump Control
To test Pump Control using float switches, force the float switch
inputs open or closed as necessary, to make the output(s) turn on
or off. In a Drain application the first pump would turn on if the
Pumps-Off and Lead float switches were closed. The second pump
would turn on if the Lag float switch also closed. Both pumps
would then turn off when all three float switches opened. In a fill
application, the first pump would turn on when the Pumps-Off and
Lead floats opened. The second pump would turn on when the Lag
float also opens. Both Pumps would turn off when all three floats
closed.
To test Pump Control using a level transducer you can temporar-
ily force the input level to a certain value by adjusting the calibra-
tion for the Analog Input. In a drain application, force the input to
be above the Lead level and the first pump should turn on. If you
then set the input above the Lag level, the second pump should also
turn on. Setting the input below the Pumps-Off setting will turn
both pumps off. In a fill application, setting the input below the
lead level will turn the first pump on. Setting the input below the
Lag level will turn on the second pump. Setting the input above the
pumps-Off level will turn off both pumps.
Once you have confirmed that the WTU-14 is controlling the sys-
tem properly, allow the system to operate automatically. Observe a
complete Drain or Fill cycle and verify that the system is operating
as required.
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