Centrifugal Purifier Troubleshooting

Question 1

Purifier will not start/run.

Answer 1

PROBABLE CAUSE:

1. No electrical power at controller.
2. Power failure at load center.
3. Faulty wiring.
4. Faulty motor.

REMEDY:

1. Restore power at controller.
2. Restore power at load center.
3. Verify proper electrical connection.
4. Repair/Replace motor.

Question 2

Noisy motor.

Answer 2

PROBABLE CAUSE:

1. Faulty bearing(s).
2. Faulty motor.

REMEDY:
1. Replacing bearing(s).
•Verify proper electrical wiring connection.
•Repair/Replace motor.

Question 3

Water leakage. Upon initial start-up, water is discharged through 1 1/2-inch drain line.

Answer 3

PROBABLE CAUSE:
1. Faulty bowl shell O-ring.

REMEDY:
1. Replace bowl shell O-ring.

Question 4

Bowl overflows through 1 1/2-inch bowl casing drain.

Answer 4

PROBABLE CAUSE:
1.Discharge pressure too high.

REMEDY:
1.Reduce discharge pressure.

Question 5

Fuel overflows through 4-inch water discharge drain.

Answer 5

PROBABLE CAUSE:
1 .Discharge pressure too high.
2. Fuel induced too fast during start-up.
3. Excessive throughput.
4. Discharge ring size incorrect.
5. Faulty or missing discharge ring O-ring.

REMEDY:

1. Reduce discharge pressure by opening back pressure valve.
2. Re-prime bowl and restart fuel flow more slowly.
3. Reduce flow using bypass.
4. Select proper discharge ring size and replace discharge ring.
5. Replace discharge ring O-ring.

Question 6

Excessive amounts of fuel in water discharge.

Answer 6

PROBABLE CAUSE:

1. Discharge ring size incorrect.
2. Bad seal between paring disc and O-ring on inlet
   - outlet housing.

REMEDY:
1. Select proper size discharge ring and replace discharge ring. Check O-ring andreplace as necessary. Ensure mating threads between the paring disc and feed tube assembly are not scarred or galled.

Question 7

Excessive amounts of water in purified fuel.

Answer 7

PROBABLE CAUSE:
1. Discharge ring size incorrect.

REMEDY:
1. Select proper size discharge ring and replace discharge ring.

Question 8

Purifier makes excessive noise or vibrates.

Answer 8

PROBABLE CAUSE:

1. Brake applied.
2. Faulty spindle bearing(s).
3. Faulty drive gear(s).
4. Unbalancedbowl.
5. Baseplate bolts over torqued.
6. Insufficient gap between motor and drive coupling.
7. Improper electrical connections.
8. Paring disc not engaged

REMEDY:
1. Release brake.
2. Replace spindle bearing(s).
3. Replace drive gear(s).
4. Notify TYCOM.
5. Re-torque baseplate bolts.
6. Readjust drive coupling.
7. Re-verify proper electrical connections.
8. Disassemble and inspect paring disc/distributor for
damage; repair or replace as necessary. Reassemble and engage paring disc.

Question 9

Purifier will not come up to speed in prescribed time

Answer 9

PROBABLE CAUSE:

1. Brake applied.
2. Agastat timer setting incorrect.
3. Faulty wiring between controller and motor.
4. Faulty bearing(s).

REMEDY:

1. Release brake.
2. Verify correct Agastat timer setting.
3. Verify proper electrical connection and wire condition.
4. Replace bearing(s).

Question 10

Loss of feed pressure

Answer 10

PROBABLE CAUSE:

1. Loss of transfer pump suction.
2. Transfer pump shutoff via programmable Navy logic controller (PNLC) **switch.
3. Power loss to transfer pump.
4. Transfer pump failure.

REMEDY:

1. Re-establish pump suction.
2. Align a full stowage tank to transfer pump.
3. Determine source for power loss. Restore power.
4. Switch feed pumps.

Question 11

Loss of discharge.

Answer 11

PROBABLE CAUSE:

1. Loss of feed pressure.
2. Loss of water seal.

REMEDY:

1. Re-establish feed supply pressure.
2. Re-establish water seal and feed supply pressure

Question 12

Air in clean fuel discharge sight glass

Answer 12

PROBABLE CAUSE:
1. Discharge pressure not in accordance with prescribed operating parameters of 4–10 psi.

REMEDY:
1. Slowly throttle purifier discharge valve until air
bubbles disappear from fuel.

Question 13

Purifier rpm slows suddenly

Answer 13

PROBABLE CAUSE:

1. Loss of water seal.
2. Loss of power to motor.
3. Faulty bearing(s) in motoror purifier drive assembly.

REMEDY:

1. Re-establish water seal and feed supply pressure.
2. Determine power problem. Re-establish power supply.
3. Replace bearing(s)

Question 14

Excessive blow back through 4-inch water discharge line and bowl casing drain

Answer 14

PROBABLE CAUSE:

1. Drain tank is full.
2. Drain tank flapper valve failed.

REMEDY:

1. Empty drain tank.
2. Verify that flapper valve is installed.

Question 15

Coupling ring will not seat/align properly during purifier re-assembly

Answer 15

PROBABLE CAUSE:

1. Distributor shaft improperly aligned.
2. Disks not aligned with distributor shaft key.
3. Bowl top key not aligned with bowl shell key way

REMEDY:

1. Align distributor shaft properly.
2. Realign disks on distributor shaft.
3. Align bowl top and bowl shell properly.