This is the end of the menu. Select “Yes” to confirm all your previous settings
or use the up and down buttons to select “No” to return to the top of the
menu. If you accept “Yes” and press P you are then asked to press the Reset
(R)
button to start the pump. The IPG20 will start the pump and attempt to
run the system using the settings you have programmed in. If the settings
you have initially made prove unsatisfactory then simply pressing and
holding down the P button for about 1 second and then releasing it will shut
the pump down and take you to the top of the menu where you can step
through the settings and make appropriate changes.
The system can be restarted automatically after a fault condition has shut
the pump off. The switch will only restart the pump once after a
predetermined time, and if the fault reoccurs it will stay off and close the
alarm relay if that option is selected. This option is not available if auto
terrain compensation is selected.
For most applications an initial setting of a few seconds is quite adequate.
The self-resetting action of the run-on timer means it will keep a pump
running in spite of repeated or continuous interruptions to flow. In
applications where entrained gas is present in the water, the run-on timer
will ignore the continuous bouncing back and forward of the paddle by
constantly resetting its time clock instant by instant.
Once running, the controller runs for whatever time you set it to in cyclic
running and then stops. As soon as it stops it closes the alarm relay
contacts (if you have set it to valve sequencing mode). The contacts remain
closed for the duration of the stopped time and then open. In valve
sequencing mode it displays the message “Value sequencing (min to go)”
rather than “Fixed stop time (hrs to go)” as it does in normal cyclic running.
This is simply to differentiate valve sequencing from normal cyclic running.
Each time the switch restarts the system after the stop time, it will reapply
the set point learnt in the initial start-up process, unless valve sequencing
has been selected. In which case “Relearn the pressure” can be used to
accommodate changes in pressure due to zone changes.
ACCEPT SETTINGS
AUTO RESTART ON A FAULT
39
