Xylem 19 001 200 R2 SILENT STORM VFD Pumping System - Manual (Page 25)

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MAINTENANCE
REGULAR MAINTENANCE = INVESTMENT
Maintenance is an investment that will pay
dividends in the form of improved reliability and
durability. Site maintenance checks are a matter of
day to day, week to week care that is important to
the proper operation of the pumping equipment.
Periodic equipment checks will ensure that the
recommended lubricants, fluids and service parts
are available and planned for. Flowtronex
recommends Preventative Maintenance be
performed quarterly.
DANGER: Personal Injury Hazard
Performing maintenance work on your pump
station can be dangerous. You face the risk of
electrical shock or related injuries, and must be
trained in the danger of electricity. If you have any
doubt, have a qualified technician do the work.
Contact the factory for the closest authorized
FlowNet service office to you.
Failure to follow these instructions will result in
death or serious injury.
REGULAR MONTHLY MAINTENANCE
INTERVALS
1. Heat exchanger:
a. Verify that the flow through the heat
exchanger is a solid streamline out of
the exhaust line into the wet well. Too
little flow reduces cooling capacity.
2. Control panel:
a. Using the operator interface, verify that
all the buttons operate properly. Also
review the station operation, fault
history, and data log for station
operation.
b. Verify that all surge devices are
visually sound. Check the surge device
for the station (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.
3. Motor lubrication:
a. If your motor has an oil bath thrust
bearing, you need to ensure that it is
filled to the recommended fill line on
the sight glass (that is, filled to the
minimum line).
b. If it is a grease filled bearing, ensure
that grease is not all over the inside of
the motor and down in the bottom of
the motor. This could be a sign of over-
filling. Refer to the motor
manufacturer's lubrication instructions.
4. Pumps - vertical turbine:
a. Verify that the area surrounding the
pump shaft has no silt built up around
the head. If there is silt build up, fix it
immediately.
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.
5. Pumps - horizontal:
a. For a horizontal pump, verify that the
mechanical seal is not leaking between
the pump and the motor.
6. Exercise the DSR using the following
procedure. With system switch and all pump
switches in the off position, close the pump
station discharge isolation valve. Place the
system switch in manual and start a VFD
pump. Slowly ramp up the VFD speed. The
DSR should open and relieve system pressure
when it exceeds set point pressure by
approximately 12-15 psi. Adjust DSR as
required to meet this requirement. Repeat test
at least once to ensure repeatability.
7. Sound and visual checks of whole station:
a. Just listen. Do you hear any odd
sounds rubbing or grinding or maybe