Xylem AquaForce Variable Speed Package System - Manual (Page 21)

Maintenance
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.
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.
Maintenance
AquaForce Variable Speed Package System Mechanical Installation, Operation, and Maintenance Manual 19