Table of Contents
Advertisement
9. FILLING THE PUMP [- B -]
DO NOT START the pump until it has been
WARNING!
positioned and installed the final place of operation.
The pump and suction line must be filled with water. Running
the pump without water will cause serious damage to the pump.
Extreme caution should be used if priming the
pump in a hot water application
9.1. FILLING PUMP IN SUCTION LIFT ARRANGEMENT [B-1]
a) Unscrew the fill plug (large plug) located above the outer
jacket in front of the coupling guard (remove coupling
guards if necessary).
b) Using a funnel, fill the suction line and pump casing
with water to overflowing.
c) Screw the fill plug back on until tight.
d) Areas that have become wet as a result of water leaks
must be dried thoroughly.
e) Reinstall the coupling covers if they have been removed;
9.2 FILLING PUMP IN A FLOODED INSTALLATION [B-1a]
a) Loosen the vent plug (small plug) several turns. Complete
removal of the plug is not necessary to prime the pump;
b) Open the suction valve until the water flows out around the
vent plug;
c) Retighten the vent plug.
10. USE, STARTING AND RUNNING [- B -]
Never allow the pump to operate without water.
WARNING!
Doing so can seriously damage internal
components.
10.1. GENERAL WARNINGS
a) The pumps are designed to operate at ambient temperature
no higher than 104°F (40°C) and elevation no higher than
3280 feet (1000 m);
b) The pumps cannot be used in swimming pools or similar
plants;
c) Prolonged operation with the discharge pipe closed can
cause damage;EVMU and EVMSU pumps are designed for
continuous and normal off/on operation. Rapid cycle may
cause high heat and loading that can damage the motor or
the pump.
WARNING!
EVMU and EVMSU pumps are designed for
continuous and normal off/on operation.
Rapid cycling may cause high heat and loading
that can damage the motor or the pump.
d) Avoid starting the pump more than 50,000 times per year. If
the pump is started more than 50,000 times per year, the
pump life may be shortened and there is a risk of
premature failure.
e) During power outages, it is advisable to disconnect the
power to the pump.
f) Select the pump so that it will operate near the best
efficiency point. Operate the pump within the allowable
operating region of the pump curve.
EBARA
www.pumpsebara.com
10.2 STARTING
Once the pump has been properly installed and primed, check
the direction of rotation before operating the pump. [B-3]
a) Start the pump with the discharge valve closed.
b) Check the motor rotation. Rotation should be clockwise
c) If motor rotation is in the wrong direction,
d) With the motor running, vent air from the pump by loosening
e) Start the pump two or three times to check system conditions;
f) With the motor running, partially close, then re-open the
g) Run the pump for a few minutes, checking that noise,
h) Shut off power to the motor and wait for the coupling to
i)
j)
k) Reinstall the two coupling guards.
10.3. RUNNING
Start the pump with the isolating valve on the discharge line
closed, then open it gradually. The pump must operate
smoothly and quietly. Close the isolating valve again and make
sure that the reading on the discharge line pressure gauge is
close to the that indicated in the pump specifications. (This
approximation is mainly attributable to tolerances and to possible
suction lift). If the pressure gauge reading is much lower than
specified, repeat the priming procedure in section 9 of this manual.
The pump is working properly if the two readings are close in
value. If the trouble with the isolating valve open continues, it
typically is an electrical or mechanical motor system problem or
of pump cavitation due to:
Note: motor output is reduced if ambient temperature and ele-
vation are higher than those specified. In this case, a larger
motor may be required.
Fast-closing valves (exceeding 1.5 times the pump nominal
pressure) can cause pressure peaks or water issues and damage
to the pump.
Operating the pump continuously at a flow rate below the
minimum rate indicated on the nameplate will result in potential
overheating of the pumped liquid and overloading of the motor
bearings.
10.4 STOPPING
a) Gradually shut off water to the discharge line to avoid over-
pressure in the piping and pump;
b) Cut off the power supply.
Pumps Americas Corporation
when viewed from the top (fan end) of the motor. Rotation
is most easily seen immediately after the motor is turned
off. [B-3]
(counterclockwise), disconnect the power supply and swap
two of the motor's power phases in the electrical enclosure
or teminal block.
the vent plug until water comes out, then retighten to close.
discharge line isolation valve a few times to cause a rapid
pressure increase.
vibration, pressure, voltage, and current are within
acceptable range.
come to a stop.
Unscrew the 4 screws and remove the two coupling guards
Inspect the interior of the motor bracket for water. If water
is present, drain the pump and reposition the coupling.
Repeat the process from step 4 to step 20 of section 8.1.1.
– excessive difference in height or excessive pressure loss
along suction line,
– low backpressure in the discharge line;
– temperature of the liquid being pumped.
Do not operate the pump continuously with the
discharge line isolating valve closed.
10
rev. 01/19
Hide quick links:
Advertisement
Table of Contents
