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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 Visually inspect the cooling tower to assess general operating
conditions and for signs of microbial growth and appearance of debris,
scale and corrosion. Refer to ASHRAE Standard 188 and Guideline 12 for
specific frequency recommendations. Consult a knowledgeable water treat-
ment professional to maintain cooling tower hygiene.
Monthly (Weekly at start up) Observe, touch, and listen to the tower.
Become accustomed to its normal appearance, sound, and level of vibration.
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, belt, sheaves 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 air inlet louvers, 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,
fill and louver 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 plugging.
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.
View the water pattern as
it exits the fill section. Con-
sistent coverage indicates
that all nozzles are flowing
properly. If there are dry spot
Warning
maintenance
