KELCO E30, Installation & Programming Manual

34

your speci

fi

 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