Troubleshooting; Pump Symptoms; Insufficient Pressure Or Flow; Loss Of Suction Operation - Pentair AURORA LAYNE VERTI-LINE Series Installation, Operation And Maintenance Manual

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Troubleshooting

If you have followed the installation and start
up procedures outlined in this manual, your
pump should provide reliable service and
long life. However, if operating problems
occur, significant time and expense can be
saved if you use the following checklist to
eliminate the most common causes of those
problems.

Pump Symptoms

Insufficient Pressure or Flow

1. Wrong direction of rotation.
a. Reverse any
connections. Check driver 0 & M.
2. Discharge head too high.
a. Change system.
b. Raise wet well level.
c. Install larger impeller & driver.
3. Impeller running clearance too great.
a. Reset impeller clearance per 0 & M
manual.
4. Insufficient suction bell submergence.
a. Raise wet well level.
5. Speed too low.
a. Check driver speed and voltage.
6. Bowl passage partially plugged.
a. Clean bowl passages.
7. Impeller passage partially blocked.
a. Clean impeller passages.
8. Clogged suction.
a. Clean suction passages.
9. Low water level.
a. Raise wet well.
10. Air in liquid.
a. Increase submergence to prevent
vortexing.
11. Improper sump design.
a. Change sump design.
b. Increase submergence to prevent
vortexing.
Layne/Verti-Line
two motor lead
6EM Thru 18GM - 1100 Vertical Turbine Pumps
12. Impeller damaged.
a. Check and repair or replace.
13. Impeller diameter too small.
a. Replace impeller with one with a
larger diameter. Check driver HP.

Loss of Suction Operation

1. Low water level.
a. Raise wet well level.
2. Insufficient suction bell submergence.
a. Raise wet well level.
3. Wrong direction of rotation.
a. Reverse any
connections. Check driver 0 & M.
4. Air or gasses in liquid.
a. Deareate liquid.
b. Increase submergence to prevent
vortexing.

Excessive Power Consumption

1. Improper impeller adjustment causing
rubbing.
a. Readjust impeller clearance setting
as outlined in this manual.
2. Head lower than rating, pumps operating
over capacity.
a. Change system.
speed. Trim impeller.
3. Speed too high.
a. Check driver speed and voltage.
4. Improper voltage to driver.
a. Check driver voltage.
b. Change power source or driver.
5. Misalignment.
a. Check motor/pump
connections. Realign coupling.
6. Packing box gland too tight.
a. Readjust packing gland.
7. Incorrect impeller diameter.
a. Determine correct impeller diameter
and replace or trim impeller.
8. Shaft bent.
a. Replace shaft.
two motor lead
Reduce pump
to base
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