Teikoku DynaPump LE Series, Инструкция по эксплуатации

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Page 8
Table 2-2. Trouble Shooting
Trouble
I. Failure to Deliver
Required Capacity
II. Insufficient Pressure
III. Pump Loses Prime After
Starting
IV. Pump Takes Too Much
Power
V. Pump Vibrates
VI. Motor Running Hot
Cause
a. Pump not primed.
b. Air leaks in suction piping.
c. Motor not energized.
d. Motor windings burnt out or
grounded.
e. Low suction head.
f. Discharge head too high.
g. Discharge valve closed or
partially opened.
h. Impeller clogged.
i . Wrong direction of rotation.
j . Damaged impeller.
a. Pump not primed.
b. Air leaks in suction piping.
c. Motor not energized.
d. Motor windings burnt out or
grounded.
e. Low suction head.
f. Discharge valve open too wide.
g. Impeller clogged.
h. Wrong direction of rotation.
i . Damaged impeller.
a. Pump not properly primed at
starting.
b. Air leaks in suction piping.
c. Air or gas in fluid.
d. Low suction head.
a. Shaft bent.
b. Rotating element binds.
c. Electrical short.
d. Wrong direction of rotation.
a. Foundation not sufficiently rigid.
b. Impeller partially clogged.
c. Shaft bent.
d. Worn bearings.
e. Rotating element rubbing stator
liner.
a. Motor operating at overload
condition.
b. Pump is operating below
minimum flow.
c. Pump is running dry.
Remedy
a. Re-prime pump in accordance with Paragraph 3-2.
b. Locate leaks and eliminate.
c. Check motor wiring. See Paragraph 2-3.
d. Check electrical continuity of windings and if
negative response, stator assembly needs to be
replaced.
e. Correct suction side of system to insure availability
of design NPSH.
f. Correct discharge side of system to insure proper
operating conditions.
g. Open discharge valve until rated discharge pressure
is obtained.
h. Remove obstructions in the impeller.
i . Reverse any two motor leads and check with phase
sequence meter. See Paragraph 3-3.
j . Impeller must be repaired or replaced.
a. Re-prime pump in accordance with Paragraph 3-2.
b. Locate leaks and eliminate.
c. Check motor wiring. See Paragraph 2-3.
d. Check electrical continuity of windings and if
negative response, stator assembly needs to be
replaced.
e. Correct suction side of system to insure availability
of design NPSH.
f. Close down discharge valve until rated discharge
pressure is obtained.
g. Remove obstructions in the impeller.
h. Reverse any two motor leads.
i . Impeller must be repaired or replaced.
a. Reprime pump in accordance with Paragraph 3-2.
b. Locate leaks and eliminate.
c. Locate source of gas or air entrainment and correct.
d. Correct suction side of system to insure availability
of design NPSH.
a. Replace rotor assembly or straighten shaft if bend is
not too great.
b. Replace bearings (See Paragraph 4-1) as a result
of excessive wear, or check for presence of foreign
material in rotor chamber.
c. Check electrical continuity of all phases of the motor
winding and replace stator assembly if necessary.
d. Reverse any two motor leads.
a. Tighten all bolts on with the pump base and base
supporting structure.
b. Remove obstructions in the impeller.
c. Replace rotor assembly or straighten shaft if bend is
not too great.
d. Replace bearings (See Paragraph 4-1).
e. Replace bearings (See Paragraph 4-1) as a result
of excessive wear or check for presence of foreign
material in rotor chamber.
a. Make sure pump is operating at design point and
conditions specified when purchased.
b. Increase the flow thru the pump.
c. Check suction line for obstructions and closed valves.