FULTON VSRT-60 - Page 86

TROUBLESHOOTING - 8
Fulton Ltd
8.2 TROUBLESHOOTING FEEDWATER PUMP
Problem
Cause
Remedy
8. Noise.
1. Cavitation occurs in the pump.
Check the suction conditions and the feed water
temperature into the pump is not exceeding 90°C.”
2. Pump does not rotate freely
(frictional resistance because
of incorrect pump shaft
position.
Adjust the pump shaft.
3. Frequency converter operation.
See Grundfos manual.
4. Boiler feedwater non-return
valve letting water passed
the valve seat, (normally
accompanied by banging in the
feedwater tank).
Check and clean boiler feed water non-return valve (NRV)
and replace if damaged or faulty
9. Water pump runs
intermittently
1. Scale on probes.
Check and clean probes, replace as necessary.
2. Faulty pump contactor
Check the contactor has power. Check the contactor is
pulling in.
Replace if necessary.
3. Faulty pump motor.
Check the pump has power.
If the pump has power but is not running, replace it.
4. Faulty Level Control Relay
Check the relay has power and is secure on its base.
Replace if faulty.
10. Boiler flooding
1. Pump does not shut off.
Dirty probes. Clean or replace as necessary.
2. Relay failed.
Ensure the relay is secure on its base.
If so replace the water level relay.
3. Earth connection.
Clean and tighten as required.
4. Vacuum created with boiler
off.
As the boiler cools, it pulls water from the system piping.
To prevent this, add a check valve on the steam gauge
assembly piping, which closes under
pressure and opens under vacuum.
VSRT-IOMM-2019-1
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