Xylem Bell & Gossett e-80SCXL Series, Инструкция по эксплуатации

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Cause Remedy
Foreign bodies in the pump unit Remove the foreign bodies
Motor bearings worn or faulty Replace the motor bearings
The pump unit does not turn freely due to a
mechanical fault
Send the pump unit to an authorized workshop for
testing
Motor turns in the wrong direction Check the direction of rotation and change it if
necessary
7.9 The pump starts up too frequently (automatic start/stop)
Cause Remedy
Incorrect priming (there are air bubbles in the
suction pipe or in the pump units)
Repeat the priming procedure
Check valve locked in closed or partially closed
position
Replace the check valve
Foot check valve locked in closed or partially
closed position
Replace the foot valve
Starter (pressure switch, sensor, etc.) set
incorrectly, or faulty
Adjust or replace the starter
Expansion vessel
• No pre-charge, or
• Undersized, or
• Not installed
• Pre-charge the expansion vessel, or
• Replace the expansion vessel with another
suitable one, or
• Install an expansion vessel
Pump unit oversized Contact Xylem or the Authorized Distributor
7.10 The pump unit never stops (automatic start/stop)
Cause Remedy
The required flow rate s greater than the one
expected
Reduce the required flow rate
Delivery pipe leaking Eliminate the leaks
Motor turns in the wrong direction Check the direction of rotation and change it if
necessary
Pipes, valves or filter clogged with impurities Remove the impurities
Starter (pressure switch, sensor, etc.) set
incorrectly, or faulty
Adjust or replace the starter
The pump unit runs but delivers too little or no liquid See “The pump unit runs but delivers too little or no
liquid”
7.11 The mechanical seal is leaking
Cause Remedy
Worn mechanical seal • Replace the mechanical seal, or
• Fit a mechanical seal with harder contact
surfaces
Mechanical seal damaged due to thermal shock
(presence of air bubbles in pump unit)
Replace the mechanical seal
Defective mechanical seal Replace the mechanical seal
Mechanical seal damaged due to temperature of
the liquid outside the rated limits
Replace the mechanical seal with another of a
suitable make
7 Troubleshooting
30 Series e-80SCXL INSTRUCTION MANUAL