Gorman-Rupp Pumps 612M60-B 1453214 and up - Manual (Page 14)

OM−04407 60 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
This is not a self-priming pump, so an external
priming device must be used if the pump is in-
stalled on a suction lift. A foot valve may be in-
stalled at the end of the suction pipe to maintain the
prime; however, this may adversely affect pump
performance due to friction loss. Many standard
centrifugal models are equipped with a hand-oper-
ated vacuum pump, exhaust primer, or ejector for
this purpose. If a priming device was not furnished
with the pump, it may be ordered from the factory
as an option.
Before attempting to operate the priming device,
close the discharge throttling valve. (Installation of
a spring-loaded check valve is also recommended
to facilitate priming.) Once the pump is fully
primed, close the valve between the priming de-
vice and pump to preserve the prime. Start the
pump and open the discharge valve slowly to fill
the discharge line.
When installed in a flooded suction application,
simply open the system valves and permit the in-
coming liquid to evacuate the air. After the pump
and piping system have completely filled, evacu-
ate any remaining air pockets in the pump or suc-
tion line.
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.
STARTING
Consult the operations manual furnished with the
power source.
Rotation
The pump could be damaged and performance
adversely affected by incorrect rotation. If pump
performance is not within the specified limits (see
the curve on page E-1), check the direction of
power source rotation before further troubleshoot-
ing.
The pump must operate in the direction in-
dicated by the arrow on the pump, or ac-
companying decals.
Consult the operating manual furnished with the
pump power source before attempting to start the
power source.
If an electric motor is used to drive the pump, re-
move V-belts, couplings, or otherwise disconnect
the pump from the motor before checking motor
rotation. Operate the motor independently while
observing the direction of the motor shaft, or cool-
ing fan.
If rotation is incorrect on a three-phase motor, have
a qualified electrician interchange any two of the
three phase wires to change direction. If rotation is