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your specifi c pump. In operation, the anti-cycling system monitors both
time and the number of starts and compares the two. If the starts per hour
rate is exceeded for a settable number of consecutive times in any one
hour period the pump will be automatically shut down and the controller
will display a message indicating the starts per hour rate was exceeded.
NUMBER OF STARTS IN SEQUENCE
After setting the required number of starts per hour and pressing (P) you
are asked how many starts in a row you are prepared to accept. The
default setting is 5 starts. This can be adjusted between 2 and 50 starts.
Assuming you accept the default of 5 sequential starts then as a simple
example of the way the anti-cycling system works, if starts per hour rate is
set to 360 (one start every 10 seconds maximum) and the pump started 4
times in a row at less than 10 seconds between each start and then did not
start again for 12 seconds the anti-cycling shutdown will not be invoked.
If, however, the pump started 5 times in a row with less than 10 seconds
between the starts the anti-cycling system would be invoked and the pump
would be shut down. In a conventional pressure system, the anti-cycling
function can be used to protect the pump from damage in the event of the
system’s air cell losing its air charge. If air is lost from a system’s air cell
due to a ruptured diaphragm or leaking air valve, the pump will hunt on and
off rapidly. Such rapid cycling will cause the pump to overheat very quickly.
LOW-PRESSURE TRIP Mode 2
The low-pressure trip point can be set to any value from zero to 2000 kPa
or from zero to 290 psi. The low-pressure trip point must be set to some
value that is less than the high-pressure trip point. If you attempt to set the
low-pressure trip point to a pressure that is greater than the high-pressure
trip point you will invoke a warning from the E30 alerting you to the problem.
If the pressure falls to below the low-pressure trip point, it is the trip pressure
that invokes the run-on timer and ultimately shuts the system down if
pressure fails to rise above its set point by the end of the run-on period.
The trip pressure will normally be set to some value that is well below the
high-pressure trip point setting.
HIGH-PRESSURE TRIP Mode 2
The high-pressure trip point can be set to any required value above the
low-pressure trip point. The range of adjustment is zero to 2000 kPa or 0
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