Maintenance
Precautions
WARNING:
• Always follow safety guidelines when working on the product. See Introduction and
Safety (page 3).
• Disconnect and lock out electrical power before installing or servicing the pump.
• Make sure that the unit cannot roll or fall over and injure people or damage property.
• Rinse the unit thoroughly with clean water before working on the unit.
• Rinse the components in water after dismantling.
WARNING:
Electrical hazard. A permanent magnet motor produces voltage when the shaft is rotating.
The conductors must be insulated.
CAUTION:
• Magnetic stray fields may damage cardiac pacemaker and other medical implants. Stay
clear of any magnetic stray fields that can occur near an open or disassembled
permanent-magnet synchronous motor, or near a separate rotor of such a motor. Keep
magnetic media away, including credit cards and watches.
•
Crush hazard during disassembly or assembly of a permanent-magnet synchronous
motor. Fingers or other body parts can be trapped and injured. Magnetic items such as
tools attracted to the rotor can also cause personal injury.
• Assembly and disassembly of permanent-magnet synchronous motors must be
performed by qualified personnel and according to relevant instructions.
Make sure that you follow these requirements:
•
Check the explosion risk before you weld or use electrical hand tools.
• Allow all system and pump components to cool before you handle them.
• Make sure that the product and its components have been thoroughly cleaned.
• Do not open any vent or drain valves or remove any plugs while the system is
pressurized. Make sure that the pump is isolated from the system and that pressure is
relieved before you disassemble the pump, remove plugs, or disconnect piping.
• If the unit has a permanent magnet motor, ensure that you have read and understood
all safety instructions regarding permanent magnet motors.
Maintenance guidelines
During maintenance and before reassembly, always remember to perform these tasks:
• Clean all parts thoroughly, particularly O-ring grooves.
• Change all O-rings, gaskets, and seal washers.
• Lubricate all springs, screws, and O-rings with grease.
During reassembly, always make sure that existing index markings are in line.
The reassembled drive unit must always be insulation-tested and the reassembled pump
must always be test-run before normal operation.
Maintenance
Flygt 3153 Installation, Operation, and Maintenance Manual 37
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