SPX Cooling Technologies CoolingTower Marley MCW - Manual (Page 21)

21
The following is recommended as a minimum routine of scheduled main-
tenance:
Always shut off electrical power to the tower fan motor prior to
performing any inspections that may involve physical contact with
the mechanical or electrical equipment in or on the tower. Lock out
and tag out any electrical switches to prevent others from turning
the power back on. Service personnel must wear proper personal
protective clothing and equipment.
Weekly: Inspect for bacterial growth and general operation conditions.
Bacterial growth should be reported to your water treatment expert for
immediate attention.
Monthly (Weekly at start up): Observe, touch, and listen to the tower.
Become accustomed to its normal appearance, sound, and level of vi-
bration. Abnormal aspects relating to the rotating equipment should be
considered reason to shut down the tower until the problem can be located
and corrected. Observe operation of the motor and fan. Become familiar
with the normal operating temperature of the motor, as well as the sight
and sound of all components as a whole.
Inspect drift eliminators and basin trash screens and remove any debris
or scale which may have accumulated. Replace any damaged or worn
out components. Use of high-pressure water may damage the eliminator
material.
Observe operation of the float valve. Depress the operating lever to make
sure that the valve is operating freely. Inspect the suction screen for plug-
ging. Remove any debris that may have accumulated.
Check for any buildup of silt on the floor of the cold water basin. Mentally
make note of the amount, if any, so future inspections will enable you to
determine the rate at which it is forming.
Every 3 months: Lubricate fan shaft bearings. While rotating equipment
by hand, grease the bearings until a bead forms around the seals—a
maximum charge of 0.40 ounces is recommended. Mobil SHC 460 grease
is recommended.
Semi-annually: Check the belt tension and condition.
Clean and disinfect cooling tower with biocides. Systems with biofouling,
high general bacterial counts, or positive cultures of legionella may require
Maintenance
Warning
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