6 Maintenance
6.1 Precautions
DANGER:
Electrical hazard sufficient to kill. Always disconnect and lock out the power before you
service the unit.
WARNING:
• This manual clearly identifies accepted methods for disassembling units. These
methods must be adhered to. Trapped liquid can rapidly expand and result in a violent
explosion and injury. Never apply heat to impellers, propellers, or their retaining
devices to aid in their removal.
• Make sure that each pump and the package are isolated from the system and that
pressure is relieved before you disassemble the pump, remove plugs, open vent or
drain valves, or disconnect the package piping.
• Always disconnect and lock out power to the package and the driver before you
perform any installation or maintenance tasks. Failure to disconnect and lock out driver
power will result in serious physical injury.
• Crush hazard. The unit and the components can be heavy. Use proper lifting methods
and wear steel-toed shoes at all times.
• Rotating shaft. Make sure that the packing adjustment is performed by qualified
personnel only.
CAUTION:
Equipment damage hazard. Silt buildup is a sign of problems with the wet well and/or
intake screen. Failure to follow these instructions indicates a potentially hazardous
situation, which, if not avoided, may result in property damage.
6.2 Monthly maintenance
Control panel checks
• Verify that all of the operator interface keys and LEDS operate properly (see controller
manual).
• Review the station operation, fault history, and data log for station operation.
• Verify that all surge devices are visually sound, where applicable.
– Check the surge device for the station which is mounted on the back of the control
panel.
– Black soot on or around the device indicates that it has taken a surge and needs to
be replaced.
Motor lubrication checks
• For grease-filled bearings, make sure that grease is not all over the inside of the motor
and in the bottom of the motor. This could be a sign of overfilling. Refer to the
lubrication instructions from the motor manufacturer.
Sound and visual checks of the whole station
• Listen for any odd sounds that rub or grind, electrical arcing, and check for anything
that is binding or unusual. These conditions can indicate a serious problem.
6 Maintenance
TECHNOForce e-HV Mechanical Installation, Operation, and Maintenance Manual 21
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