Gorman-Rupp Pumps 810A2-F5L 1299234 thru 1322932 - Manual (Page 16)

OM--02396 80 SERIES
OPERATION PAGE C -- 4
Pump Vacuum Check
With the pump inoperative, install a vacuum gauge
in the system, using pipe dope on the threads.
Block the suction line and start the pump. At oper-
ating speed the pump should pull a vacuum of 20
inches (508 mm) or more of mercury. If it does not,
check for air leaks in the seal, gasket, or discharge
valve.
Open the suction line, and read the vacuum gauge
with the pump primed and at operation speed.
Shut off the pump. The vacuum gauge reading will
immediately drop proportionate to static suction
lift, and should then stabilize. If the vacuum reading
falls off rapidly after stabilization, an air leak exists.
Before checking for the source of the leak, check
the point of installation of the vacuum gauge.
STOPPING
Manual Stopping
In the manual mode, reduce the throttle speed
slowly, and allow the engine to idle briefly before
switching the HAND-OFF-AUTO switch to ‘OFF’.
If the application involves a high discharge
head, gradually close the discharge
throttling valve before stopping the pump.
After stopping the pump, switch off the engine igni-
tion and disconnect the positive battery cable to
ensure that the pump will remain inoperative.
Automatic Stopping
In the automatic mode, the pump will stop when
the liquid in the wet well or sump lowers and acti-
vates the “Off” float switch(s). The pump will restart
automatically when the liquid rises and activates
the “On” float switch(s).
Safety Shutdown System
The unit is equipped with a safety system to auto-
matically shut down the engine under certain con-
ditions. The engine will automatically shut down:
1. If the engine exceeds its safe operating tem-
perature.
2. If the engine oil pressure drops below design
limits.
3. If the engine fails to start within a pre-set peri-
od of time.
4. If the engine speed exceeds the safe operat-
ing range.
5. If the engine fan belt breaks.
Lights on the control panel will indicate which of the
safety features has caused the engine to shut
down.
Should any of the safety features cause the engine
to shut down,
the cause must be determined and
corrected before putting the unit back into service.
The engine
will not restart until the HAND-OFF-
AUTO switch has been returned to the ‘OFF’ posi-
tion for at least 10 seconds.
All safety shutdown features are pre-set at the fac-
tory for optimum performance and safety;
do not
attempt to adjust these settings.
Never disconnect any of the safety shut-
down features; this will void the warran-
ty and could result in serious damage to
the unit and/or injury to personnel. Safe-
ty shutdown features are pre-set at the
factory; do not attempt to adjust any of
the settings. Determine the cause of
shutdown before putting the unit back
into service. Consult the factory for ad-
ditional information.
OPERATION IN EXTREME HEAT
The safety shutdown system will automatically
stop the unit if engine operating temperature ex-
ceeds design limits. If engine over-temperature
shutdown occurs, allow the unit to cool before re-
starting.
If engine overheating continues, check the engine
lubricant level and viscosity. Consult the engine