Gorman-Rupp Pumps 81 1/2D3-E.75 3P 252952 and up - Manual (Page 13)

OM−00753 80 SERIES
OPERATION PAGE C − 1
OPERATION − SECTION C
Review all SAFETY information in Section A.
Follow the instructions on all tags, labels and
decals attached to the pump.
This pump is designed to handle most
non-volatile, non-flammable liquids
containing specified entrained solids.
Do not attempt to pump volatile, corro-
sive, or flammable liquids which may
damage the pump or endanger person-
nel as a result of pump failure.
Pump speed and operating condition
points must be within the continuous per-
formance range shown on the curve (see
Section E, Page 1).
PRIMING
Install the pump and piping as described in IN-
STALLATION. Make sure that the piping connec-
tions are tight, and that the pump is securely
mounted. Check that the pump is properly lubri-
cated (see LUBRICATION in MAINTENANCE
AND REPAIR).
This pump is self-priming, but the pump should
never be operated unless there is liquid in the
pump casing.
Never operate this pump unless there is
liquid in the pump casing. The pump will
not prime when dry. Extended operation of
a dry pump will destroy the seal assembly.
Add liquid to the pump casing when:
1. The pump is being put into service for the
first time.
2. The pump has not been used for a consider-
able length of time.
3. The liquid in the pump casing has evapo-
rated.
Once the pump casing has been filled, the pump
will prime and reprime as necessary.
After filling the pump casing, reinstall
and tighten the fill plug. Do not attempt
to operate the pump unless all connect-
ing piping is securely installed. Other-
wise, liquid in the pump forced out un-
der pressure could cause injury to per-
sonnel.
To fill the pump, remove the pump casing fill cover
or fill plug in the top of the casing, and add clean
liquid until the casing is filled. Replace the fill cover
or fill plug before operating the pump.
STARTING
Consult the operations manual furnished with the
motor.
Rotation
The correct direction of pump rotation is counter-
clockwise when facing the impeller. The pump
could be damaged and performance adversely af-
fected by incorrect rotation. If pump performance
is not within the specified limits (see the curve on
page E-1), check the direction of motor rotation be-
fore further troubleshooting.
Briefly apply power to the motor while observing
the direction of shaft rotation through the window"
in the side of the intermediate.
If rotation is incorrect on a three-phase motor, have
a qualified electrician interchange any two of the
three phase wires to change direction.