P-69 enter “0.2”, empty damping 0.2 m/min
P-74 enter option “2”, fail-safe low to protect pumps
P-75 enter “.5”, fail-safe timer
at a max. draw rate of 0.2 m/min, this would protect pumps.
If a loss of echo occurred at 0.5 m, after 30 sec. level would
equal that of acceptable low level alarm and pump would
shut off.
press:
to re-enter run mode
Pump Run-on
Pump run-on is a special feature designed to allow the pump assigned, temporarily
(sequential loop) or permanently (fixed roster), to the lowest OFF setpoint to continue
pumping after it has reached that OFF setpoint. The duration of run-on is set by P-30.
Only one run-on duration is allowed per interval. The interval is the time period set by
P-29 which begins upon return to the run mode or resumption of power. No run-on is
allowed during the first interval.
CAUTION
EXTENDED PUMP RUN-ON CAN LEAD TO CAVITATION,
CAUSING AIR LOCK OR PUMP DAMAGE
Conditions of use:
•
Do not use run-on feature during pump-up operation as an overflow
condition may occur. Set P-29 and 30 to 0.
•
Select the loss of echo default “dE” to protect pumps from cavitating in the
event of loss of echo.
•
The run-on interval must be greater than the run-on duration.
e.g. P-29 = 24 and P-30 = 15
After 24 hours from going into the run mode, the HydroRanger I enters the second
run-on interval allowing only one pump run-on cycle of 15 seconds, at the first time the
lead pump turns off. If the lead pump turns off a second time during that 24 hour
interval, no run-on will occur. After the 24 hour interval has elapsed, whether a pump
run-on has occurred or not, the next run-on interval will begin, allowing one run-on cycle.
RUN
CAL
PL-399 6 – 10
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