Gorman-Rupp Pumps T6A60S-4045T-ESP 1473164 and up - Manual (Page 22)

OM-06331 SUPER T SERIES
OPERATION PAGE C - 6
liquid from the pump by removing the
casing drain plug. Use caution when re­
moving the plug to prevent injury to per­
sonnel from hot liquid.
As a safeguard against rupture or explosion due to
heat, this pump is equipped with a pressure relief
valve which will open if vapor pressure within the
pump casing reaches a critical point. If over‐heat­
ing does occur, stop the pump immediately and al­
low it to cool before servicing it. Approach any
over‐heated pump cautiously. It is recom­
mended that the pressure relief valve assembly be
replaced at each overhaul, or any time the pump
casing over‐heats and activates the valve. Never
replace this valve with a substitute which has not
been specified or provided by the Gorman‐Rupp
Company.
Strainer Check
If a suction strainer has been shipped with the
pump or installed by the user, check the strainer
regularly, and clean it as necessary. The strainer
should also be checked if pump flow rate begins to
drop. If a vacuum suction gauge has been in­
stalled, monitor and record the readings regularly
to detect strainer blockage.
Never introduce air or steam pressure into the
pump casing or piping to remove a blockage. This
could result in personal injury or damage to the
equipment. If backflushing is absolutely neces­
sary, liquid pressure must be limited to 50% of the
maximum permissible operating pressure shown
on the pump performance curve.
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
turning the kewswitch to `OFF'.
If the application involves a high discharge
head, gradually close the discharge
throttling valve before stopping the pump.
After stopping the pump, close and lock the control
panel cover, or disconnect the positive battery
cable to ensure that the pump will remain inopera­
tive.
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) or “Off” setpoint
stored in the optional EPS. The pump will restart
automatically when the liquid rises and activates
the “On” float switch(s) or “On” setpoint stored in
the optional EPS.
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 in five attempts.
The control panel display 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