Maintenance/repair
en
Installation and operating instructions Wilo-Atmos TERA-SCH
33
worn. The gasket must be replaced. The service life of a mechanical seal greatly de-
pends on the operating conditions (temperature, pressure, fluid properties).
ƒ
Wilo recommends checking the flexible coupling elements regularly and replacing
them at the first sign of wear.
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Wilo recommends briefly putting the standby pumps into operation at least once a
week to ensure they are always ready for operation.
9.3
Maintenance tasks
Atmos TERA-SCH pumps require little routine maintenance. However, regular observa-
tion and analysis of various working parameters avoids serious troubles.
Keep daily logbook records of working parameters like suction and discharge pressure,
flow rate. It is recommended to record parameters twice a shift. Any sudden change
should be a signal for investigation.
Some of the routine maintenance checks for this purpose are as under:
Parts
Action
Period
Remarks
Mechanical Seal
Check for leakage
Daily
Gland Packing
Check for leakage
Daily
10–120 drops/min
are normal
Gland Packing
Check for leakage
Half yearly
If necessary replace
with new packings
Bearings
Check temperature
Weekly
Bearings are
greased for life and
are maintenance
free
Suction Pressure
Check pressure
Daily
Discharge Pressure
Check pressure
Daily
Flushing
Check for leakage
Weekly
Flow through the
Flushing pipes must
be clear and con-
tinuous
Vibration
Check vibration
Weekly
Voltage and current
Check for the rated
values
Weekly
Rotating element
Check for wear
Yearly
Clearances
Check the clear-
ances between
wear ring and im-
peller
Yearly
If value of clearance
has increased, wear
ring should be re-
placed
Total Dynamic Head
Check on suction
and discharge
Yearly
Alignment
Check the align-
ment of pump with
motor
Half yearly
For reference use
pump motor GA
Drawing
Table 12:
Routine maintenance checks
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The rolling bearings of the motors are to be maintained according to the installation
and operating instructions of the motor manufacturer.
9.4
Draining and cleaning
WARNING
Risk of injury and damage to property!
• Dispose off the pump contents and rinsing fluid by taking the legal regulations
into account.
• Always wear protective clothing, protective gloves and protective goggles when
working.
