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3. Pump priming CAUTION
Before starting or while operating the pump, the casing and suction line must be
completely filled with the liquid being pumped. The rotating parts depend on this liquid for
lubrication and the pump may seize if operated without liquid.
4. Pump by pass line CAUTION
When operating for some time at reduced capacity, much of the pump horsepower will go
into the liquid in the form of heat. A by pass must be provided under these conditions to
prevent the liquid in the pump from becoming hot enough to vaporize.
5. Operation at reduced capacity CAUTION
Damage to pump may result from prolonged operations at capacities less than 25% of the
best efficiency point
6. Bearing lubrication WARNING
Operation of the unit without correct lubrication can result in overheating of the bearings,
Bearing failures, pump seizures and actual breakup of the equipment, exposing operating
personnel to injury.
7. Operation inspections WARNING
Do not attempt any maintenance, inspection, repair or cleaning in the vicinity of rotating
equipment. Such action could result in injury to operating personnel.
8. Coupling guards WARNING
The unit must not be operated unless coupling guard is in place. Failure to observe this
warning could result in injury to operating personnel.
1.5 Maintenance safety procedures
1. Tagging for inspection or repair WARNING
Before attempting any inspection or repair on the pump the driver controls must be in the
"off" position, locked and tagged to prevent injury to personnel performing service to the
pump.
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